A cyclone hood

Abstract

This application discloses a swirling fume hood, including an air inlet for introducing cooking fumes and an oil mesh frame. The oil mesh frame is disposed at the air inlet. A first frame and a second frame are connected at a certain angle, and the groove formed by the two frames faces the outside of the fume hood along a first direction to receive airflow. Airflow enters the fume hood from the first frame and the second frame respectively. The airflow entering from the first frame is symmetrical to the airflow entering from the second frame. Under the Bernoulli effect of the airflow, a low-pressure zone is formed at the connection between the first frame and the second frame, and the two airflow segments interact to form a strong swirling airflow. The low-pressure zone generates additional suction, which improves the efficiency of the fume hood in extracting cooking fumes. The groove formed by the first frame and the second frame gradually narrows. Under the Venturi effect of the airflow, the airflow velocity is further accelerated during the process of flowing into the fume hood, which improves the efficiency of extracting cooking fumes.

Description

Technical Field

[0001] This application relates to the field of kitchen fume treatment equipment technology, and in particular to a vortex-type fume hood. Background Technology

[0002] In the existing field of household and commercial kitchen fume treatment technology, the range hood, as a core device, primarily functions to capture and expel cooking fumes during cooking to ensure indoor air quality and user health. Currently, traditional range hoods generally employ single-point or dual-point suction designs. This involves creating negative pressure through one or two air inlets directly above the cooktop to draw cooking fumes into the hood, which are then exhausted outdoors through ductwork. However, the effective negative pressure coverage of traditional range hoods in the horizontal direction is limited. They often only effectively extract fumes from a localized area directly below the air inlet, allowing fumes to easily escape into the room. In poorly ventilated spaces like apartments, fumes are difficult to expel. Traditional range hoods suffer from limited fume extraction efficiency and poor airflow organization. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a vortex-type fume hood, which has high efficiency in extracting cooking fumes and a wide range of extraction areas.

[0004] According to an embodiment of this application, a swirling fume hood includes: a fume hood frame, the fume hood frame having an air inlet in a first direction for introducing fumes; a fan, disposed inside the fume hood frame, for discharging gas from inside the fume hood frame to the outside; and an oil mesh frame, disposed at the air inlet, the oil mesh frame including a first frame and a second frame, the first frame and the second frame being arranged along a second direction and connected at a certain angle, the first frame being connected to the second frame, the first frame and the second frame together forming a groove in the first direction, the groove facing the outside of the fume hood for receiving fumes; when the fan is started, the fumes enter the fume hood through the groove formed by the first frame and the second frame, creating a low-pressure area at the connection between the first frame and the second frame, the low-pressure area further driving the fumes to form a swirling airflow and flow towards the first frame and the second frame.

[0005] According to one aspect of the embodiment of this application, the first frame and the second frame have the same structural dimensions, and the first frame and the second frame are symmetrically distributed about the connection between the first frame and the second frame.

[0006] According to one embodiment of this application, the oil mesh frame includes a third frame, which is disposed on the air inlet of the fume hood frame and is inclined in a second direction.

[0007] According to one embodiment of this application, the swirl-type fume hood includes a second filter element installed in an oil mesh frame for filtering larger oil droplets and particulate matter with a diameter of 10 micrometers or more in the fumes.

[0008] According to one embodiment of this application, the swirl-type fume hood includes a second filter element installed inside the fume hood frame, with an oil mesh frame located in a first direction of the second filter element. The second filter element is used to filter particulate matter with a diameter of 1 micrometer to 10 micrometers in the oil fumes.

[0009] According to one embodiment of this application, a first air duct is provided inside the fume hood frame. The fume hood frame, the oil mesh frame, and the second filter element form the first air duct. The first air duct is used to receive the oil fumes entering through the first filter element and guide the oil fumes to the second filter element.

[0010] According to one embodiment of this application, the swirl-type smoke hood includes a third filter element installed within the smoke hood frame, and a second filter element located in a second direction of the third filter element. The third filter element is used to filter particulate matter of 0.1 micrometers to 1 micrometer. According to one embodiment of this application, a second air duct is provided inside the fume hood frame, and the third filter, the second filter and the fume hood frame form the second air duct.

[0011] According to one embodiment of this application, a third air duct is provided inside the fume hood frame, and a third filter element is located in the second direction of the fan. The third filter element, the fan, and the fume hood frame form the third air duct.

[0012] According to one embodiment of this application, the swirl-type fume hood includes an exhaust hood, which is mounted on a fan located in a first direction of the exhaust hood. The fan is used to exhaust gas from the fume hood frame.

[0013] The swirling fume hood according to the embodiments of this application has at least the following beneficial effects: In the oil mesh frame, the first frame and the second frame are connected at a certain angle, and the groove formed by the two is oriented towards the outside of the fume hood frame along the first direction to receive airflow. The airflow enters the fume hood frame from the first frame and the second frame respectively. The airflow entering the fume hood frame from the first frame is symmetrical to the airflow entering the fume hood frame from the second frame. Under the Bernoulli effect of the airflow, a low-pressure area is formed at the connection between the first frame and the second frame, and the two airflows interact to form a strong swirling airflow. The low-pressure area generates additional suction, which improves the efficiency of the fume hood in extracting oil fumes. The groove formed by the first frame and the second frame gradually narrows. Under the Venturi effect of the airflow, the airflow velocity is further accelerated during the process of flowing into the fume hood, which improves the efficiency of extracting oil fumes.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the overall structure of a swirling smoke hood according to one embodiment of this application; Figure 2 for Figure 1 A top view of a vortex-type smoke hood; Figure 3 for Figure 2 A cross-sectional view at section line AA of the vortex-type fume hood; Figure 4 This is an explosion diagram of the main structure of a vortex-type smoke hood.

[0016] Figure label: 100. Fume hood frame; 110. First air duct; 120. Second air duct; 130. Third air duct; 140. Air inlet; 200. Fan; 300. Oil filter frame; 310. First frame; 320. Second frame; 330. Third frame; 400. First filter element; 500. Second filter element; 600. Third filter element; 700. Fume hood; 800. Side panel; 900. Lighting. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] In the existing field of household and commercial kitchen fume treatment technology, the range hood, as a core device, primarily functions to capture and expel cooking fumes during the cooking process to ensure indoor air quality and user health. Currently, traditional range hoods generally employ a single-point or dual-point suction design, which uses one or two suction vents located directly above the cooktop to create negative pressure, drawing cooking fumes into the hood before expelling them outdoors through ductwork. However, traditional range hoods suffer from the following four technical shortcomings: (1) The range of oil fume absorption is limited. Traditional single-point or dual-point suction structures have limited effective negative pressure coverage in the horizontal direction, often only effectively capturing a local area directly below the suction port. During cooking, the generation of fumes is instantaneous and the direction of their flow is uncertain. Once the fumes deviate from the central axis of the suction port, they are very easy to escape into the indoor environment and cause a decline in indoor air quality.

[0023] (2) High energy consumption and high noise To compensate for the limited range of oil fume extraction, existing technologies typically increase fan speed and power to expand the fume extraction coverage. However, while this method improves fume extraction, it also increases energy consumption and fan noise, severely impacting the user experience.

[0024] (3) Poor airflow organization Traditional range hoods lack a systematic design for airflow organization, failing to create a stable and controllable negative pressure capture zone between the air intake and the cooking area. As the fumes rise, they are easily disturbed by lateral airflow within the room (such as open doors and windows, and people walking around), leading to turbulent airflow, fume dispersion, and further reducing capture efficiency.

[0025] (4) The escaping fumes cannot be recovered. For cooking fumes that have already escaped beyond the negative pressure range of the air intake, traditional range hoods lack an effective secondary capture or recirculation mechanism, which means that these fumes cannot be re-absorbed and processed. Ultimately, they can only be slowly diluted and discharged through the indoor ventilation system, resulting in a significant reduction in overall processing efficiency.

[0026] To address the aforementioned problems, this application proposes a vortex-type fume hood, which has high efficiency in extracting cooking fumes and a wide range of extraction areas.

[0027] It is worth noting that, please refer to Figures 1 to 4 In the diagram, the X-axis points in the first direction, which is below the swirling smoke hood, and the Y-axis points in the second direction, which is in front of the swirling smoke hood.

[0028] The following is for reference. Figures 1 to 4 A swirling smoke hood is described according to an embodiment of this application.

[0029] Please refer to Figure 1 and Figure 3 One embodiment of this application discloses a swirling fume hood, which includes a fume hood frame 100, a fan 200, and an oil mesh frame 300. The fume hood frame 100 has an air inlet 140 for introducing oil fumes in a first direction. The fan 200 is disposed inside the fume hood frame 100 and is used to discharge the gas inside the fume hood frame 100 to the outside. The oil mesh frame 300 is disposed at the air inlet 140 and includes a first frame 310 and a second frame 320. The first frame 310 and the second frame 320 are aligned along the second... The first frame 310 and the second frame 320 are arranged in a certain direction and connected at a certain angle. One side of the first frame 310 is connected to one side of the second frame 320. The first frame 310 and the second frame 320 together form a groove in the first direction. The groove faces the outside of the fume hood and is used to receive oil fumes. When the fan 200 is started, the oil fumes enter the fume hood through the groove formed by the first frame 310 and the second frame 320 and form a swirling airflow. This creates a low-pressure area at the connection between the first frame 310 and the second frame 320. The low-pressure area further drives the oil fumes to flow towards the first frame 310 and the second frame 320.

[0030] like Figure 1 As shown, the vortex-type range hood includes an upper range hood frame 100 and lower side panels 800. The range hood frame 100 is mounted to the wall via its rear side. There are two side panels 800, located below the left and right sides of the range hood frame 100, respectively. It can be understood that the arrangement of the left and right side panels 800 controls the fumes from escaping through the left and right sides of the range hood, without affecting cooking. Figure 3As shown, a fan 200 is installed inside the fume hood. The fan 200 can exhaust the gas inside the fume hood frame 100 and create a negative pressure inside the fume hood frame 100. The fume hood frame 100 has an air inlet 140 at the bottom, specifically located at the lower front part of the fume hood. The fume hood draws in oil fumes through the air inlet 140. A first frame 310 and a second frame 320 are fixedly installed on the air inlet 140. The first frame 310 and the second frame 320 are arranged along the front-back direction of the fume hood and connected at a certain angle, which can be 120°. One side of the first frame 310 is connected to one side of the second frame 320. The first frame 310 and the second frame 320 together form a groove. The cross-section of the groove is formed such that the groove faces downwards from the fume hood to receive oil fumes. It is understood that the included angle formed by the connection of the first frame 310 and the second frame 320 can be any angle other than 120°, such as 90°, 150°, etc.; the first frame 310 and the second frame 320 can be connected by a plate, and the first frame 310, the second frame 320 and the plate together form a groove. The cross-section of the groove is similar to a trapezoid or other quadrilateral structure. It is only necessary to ensure that when the oil fumes enter from below the air inlet 140, the groove narrows upward from the bottom where the oil fumes enter; the fixed installation method of the first frame 310 and the second frame 320 to the air inlet 140 can be a threaded connection, welding, snap-fit, etc., which are well known to those skilled in the art, and therefore are not limited here.

[0031] When the fan 200 starts, the airflow enters the fume hood frame 100 from the first frame 310 and the second frame 320 respectively. The airflow entering the fume hood frame 100 from the first frame 310 is symmetrical with the airflow entering the fume hood frame 100 from the second frame 320. Under the Bernoulli effect of the airflow, a low-pressure area is formed at the connection between the first frame 310 and the second frame 320, and the two airflows interact to form a strong swirling airflow. The groove formed by the first frame 310 and the second frame 320 gradually narrows. Under the Venturi effect of the airflow, the airflow velocity is further increased during the process of flowing into the fume hood, and the efficiency of extracting oil fumes is improved.

[0032] Furthermore, such as Figure 3As shown, the first frame 310 and the second frame 320 have the same structural dimensions, and the first frame 310 and the second frame 320 are symmetrically distributed about the connection point between the first frame 310 and the second frame 320. It can be understood that when the first frame 310 and the second frame 320 are identical in structural dimensions, the first frame 310, the second frame 320, and the air inlet 140 together form an isosceles triangle. This arrangement is beneficial because the airflow and velocity of the two airflow segments flowing into the first frame 310 and the second frame 320 are almost the same, so as to ensure that the airflow entering the fume hood frame 100 from the first frame 310 is symmetrical with the airflow entering the fume hood frame 100 from the second frame 320. The swirling airflow formed by the interaction of the two airflow segments is also more stable.

[0033] In some embodiments, such as Figure 3 As shown, the oil mesh frame 300 includes a third frame 330, which is disposed on the air inlet 140 of the fume hood frame 100. The third frame 330 is inclined in the second direction. That is, the third frame 330 is disposed at the bottom of the front side of the fume hood, with one side of the third frame 330 connected at an angle to the lower part of the fume hood frame 100 and the other side connected at an angle to the front side of the fume hood frame 100. The third frame 330 is inclinedly disposed at the lower front part of the fume hood, and the third frame 330 is arranged in a chamfered manner. Understandably, the generation and dissipation of cooking fumes are highly unstable during cooking. Even if the first frame 310 and the second frame 320 can effectively form a stable airflow organization so that the fumes flow into the fume hood in a swirling airflow direction, there may still be situations where the amount of fumes generated is too large and the first frame 310 and the second frame 320 are insufficient to receive all the fumes. In this case, the fumes will dissipate. Since the rear side of the fume hood is installed on the wall, the left and right side panels 800 of the fume hood can control the fumes from dissipating through the left and right sides of the fume hood. The dissipated fumes move towards the front of the fume hood. Then, the third frame 330 extracts the fumes that have dissipated to the front of the fume hood, completing the compensation extraction of the dissipated fumes and preventing the fumes from dissipating into the room and causing harm to the human body.

[0034] In some embodiments, see Figure 3 and Figure 4 The swirling fume hood includes a second filter element 500, which is installed in the oil mesh frame 300 and is used to filter larger oil droplets and particles with a diameter of more than 10 micrometers in the fumes.

[0035] In other words, there are three second filter elements 500, which correspond to the first frame 310, the second frame 320, and the third frame 330, respectively. The second filter elements 500 are fixedly installed on the side of the first frame 310, the second frame 320, and the third frame 330 facing the inside of the hood frame 100. The second filter element 500 is formed as a metal foam filter. When the fumes pass through the second filter element 500, larger oil droplets and particles larger than 10 micrometers collide with the metal foam filter of the second filter element 500 due to inertia. The oil droplets and particles larger than 10 micrometers are effectively filtered by the second filter element 500. The function of the second filter element 500 is also to protect the subsequent finer filters inside the hood and prevent larger oil droplets and particles from damaging and contaminating the subsequent filters. In order to achieve the above objectives, the second filter element 500 needs to be cleaned regularly.

[0036] Further, please see Figure 3 and Figure 4 The swirling fume hood includes a second filter element 500, which is installed inside the fume hood frame 100. The oil mesh frame 300 is located in the first direction of the second filter element 500. The second filter element 500 is used to filter particulate matter with a diameter of 1 micrometer to 10 micrometers in the oil fumes.

[0037] In other words, the fume hood frame 100 is equipped with a second filter element 500, which is installed above the oil mesh frame 300. After the fumes enter the fume hood frame 100 from bottom to top through the oil mesh frame 300, they continue to flow upwards to the second filter element 500 for further filtration. The second filter element 500 is made of synthetic fibers, glass fibers, or their composite materials treated with electrostatic or other enhancement processes. The second filter element 500 is formed as a filter bag structure. The filter bag itself is relatively thin, but through a multi-bag design, its filtration area can be increased to 3-10 square meters. When the fumes pass through the second filter element 500 from bottom to top, oil droplets and particulate matter with particle diameters between 1 and 10 micrometers are filtered by inertial collision and interception by the second filter element 500. To maintain the overall filtration effect of the fume hood, the second filter element 500 needs to be replaced periodically. Understandably, the second filter element 500 can also be formed into a plate type, pleated type, or other structures. Plate type and pleated type filter elements can increase the filtration area to 3-10 square meters through pleating processes, achieving the same filtration effect.

[0038] In some embodiments, see Figure 3 The fume hood frame 100 has a first air duct 110 inside. The fume hood frame 100, the oil mesh frame 300, and the second filter element 500 form the first air duct 110. The first air duct 110 is used to receive the oil fumes entering through the first filter element 400 and guide the oil fumes to the second filter element 500. That is to say, as Figure 3As shown, the fan 200 is located at the rear end of the hood frame 100, and the oil mesh frame 300 is located at the lower part of the front end of the hood frame 100. During the installation of the hood, the oil mesh frame 300 is aligned downwards with the source of the fumes, such as the stove or induction cooker. During cooking, the fan 200 is activated and drives the airflow inside the hood from front to back. The airflow enters from the air inlet 140 located at the lower front of the hood and flows backwards towards the fan 200. Correspondingly, the fumes enter the hood through the oil mesh frame 300. The first filter element 400 filters out large oil droplets and particulate matter from the fumes. The filtered fumes flow into the first air duct 110 formed by the hood frame 100, the oil mesh frame 300, and the second filter element 500.

[0039] In some embodiments, see Figure 3 and Figure 4 The swirling smoke hood includes a third filter element 600, which is installed inside the smoke hood frame 100. A second filter element 500 is located in the second direction of the third filter element 600. The third filter element 600 is used to filter particulate matter with a particle diameter of 0.1 micrometer to 1 micrometer. In other words, after being filtered by the first filter element 400 and the second filter element 500, the fumes continue to flow towards the rear of the fume hood under the drive of the fan 200 to the third filter element 600 for further filtration. The third filter element 600 is a fiber-type filter medium made of materials such as PP / PTFE. This filter medium forms dense and tortuous microporous channels, which can comprehensively utilize filtration methods such as interception, inertial collision, diffusion, and sieving to filter particulate matter with a diameter of 0.1 micrometers to 1 micrometer that remains in the fumes. The fumes filtered by the third filter element 600 can be directly discharged into the natural environment, meeting the modern kitchen's pursuit of environmentally friendly kitchen equipment. In addition, the fumes filtered by the third filter element 600 can also significantly improve indoor air quality, making it particularly suitable for scenarios with high air quality requirements or where it is impossible to exhaust the fumes outdoors.

[0040] Further, please see Figure 3The range hood frame 100 has a second air duct 120 inside, which is formed by the third filter element 600, the second filter element 500, and the range hood frame 100. That is to say, the fan 200 is located at the rear end of the range hood frame 100, and the oil mesh frame 300 is located at the lower part of the front end of the range hood frame 100. During the installation of the range hood, the oil mesh frame 300 is aligned downwards with the place where oil fumes are generated, such as the stove, induction cooker, etc. During cooking, the fan 200 is activated and drives the airflow inside the fume hood to flow from front to back. The airflow enters from the air inlet 140 located at the lower front of the fume hood and flows backward toward the fan 200. Correspondingly, the fumes enter the fume hood through the oil mesh frame 300. The first filter element 400 filters the large oil droplets and particulate matter in the fumes. The fumes filtered by the first filter element 400 flow into the first air duct 110 formed by the fume hood frame 100, the oil mesh frame 300, and the second filter element 500. Driven by the fan 200, the fumes continue to flow upward toward the second filter element 500. After being filtered by the second filter element 500, the fumes flow into the second air duct 120 formed by the third filter element 600, the second filter element 500, and the fume hood frame 100.

[0041] Further, please see Figure 3 The fume hood frame 100 has a third air duct 130 inside, and the third filter element 600 is located in the second direction of the fan 200. The third filter element 600, the fan 200, and the fume hood frame 100 form the third air duct 130. That is to say, the fan 200 is located at the rear end of the fume hood frame 100, and the oil mesh frame 300 is located at the lower part of the front end of the fume hood frame 100. During the installation of the fume hood, the oil mesh frame 300 is aligned downwards with the place where oil fumes are generated, such as the stove, induction cooker, etc. During cooking, the fan 200 is activated, driving the airflow inside the fume hood from front to back. The airflow enters through the air inlet 140 located at the lower front of the fume hood and flows backward toward the fan 200. Correspondingly, the fumes enter the fume hood through the oil mesh frame 300. The first filter element 400 filters out large oil droplets and particulate matter from the fumes. The fumes filtered by the first filter element 400 flow into the first air duct 110 formed by the fume hood frame 100, the oil mesh frame 300, and the second filter element 500. Driven by the fan 200, the fumes continue to flow upward to the second filter element 500. After being filtered by the second filter element 500, the fumes flow into the second air duct 120, which is formed by the third filter element 600, the second filter element 500, and the fume hood frame 100. Then, the fumes continue to flow behind the fume hood to the third filter element 600. After being filtered by the third filter element 600, the fumes flow into the third air duct 130, which is formed by the third filter element 600, the fan 200, and the fume hood frame 100.

[0042] Further, please see Figures 1 to 4The vortex-type fume hood also includes an exhaust hood 700, which is mounted on a fan 200. The fan 200 is located in the first direction of the exhaust hood 700 and is used to exhaust the gas inside the fume hood frame 100. That is to say, as Figure 2 As shown, the exhaust hood 700 is located at the rear of the hood frame 100, as... Figure 3 and Figure 4 As shown, the fan 200 has an exhaust port at the top, and the smoke hood 700 is installed above the exhaust port of the fan 200. When the fan 200 is started, it can drive the gas in the smoke hood frame 100 to flow into the fan 200 and upward through the exhaust port into the smoke hood 700. The smoke hood 700 discharges the gas from the swirling smoke hood.

[0043] Further, please see Figure 1 The vortex-type fume hood also includes a light 900, which is mounted on the fume hood frame 100 to provide light for cooking. In other words, as... Figure 1 As shown, there are two lights 900, which are installed on the front surface of the fume hood frame 100. The lights 900 face downwards from the vortex-type fume hood and are used to illuminate the stove or induction cooker and other cooking equipment to provide sufficient lighting for cooking.

[0044] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A cyclone smoke hood, characterized by, include: A fume hood frame, wherein the fume hood frame has an air inlet for introducing oil fumes in a first direction; A fan is installed inside the fume hood frame to exhaust the gas inside the fume hood frame to the outside of the fume hood frame. An oil mesh frame is disposed at the air inlet. The oil mesh frame includes a first frame and a second frame. The first frame and the second frame are arranged along a second direction and connected at a certain angle. The first frame is connected to the second frame. The first frame and the second frame together form a groove in a first direction. The groove faces the outside of the fume hood and is used to receive oil fumes. When the fan is started, the oil fumes enter the fume hood through the groove formed by the first frame and the second frame, creating a low-pressure zone at the connection between the first frame and the second frame. The low-pressure zone further drives the oil fumes to form a swirling airflow and flow towards the first frame and the second frame.

2. The cyclone chimney according to claim 1, characterized in that The first frame and the second frame have the same structural dimensions, and the first frame and the second frame are symmetrically distributed about the connection point between the first frame and the second frame.

3. The cyclone chimney according to claim 1, characterized in that The oil mesh frame includes a third frame, which is disposed on the air inlet of the fume hood frame and is inclined in a second direction.

4. The cyclone chimney according to claim 1, characterized in that It includes a second filter element, which is installed in the oil mesh frame and is used to filter oil droplets and particulate matter with a diameter of 10 micrometers or more in the oil fumes.

5. The cyclone chimney according to claim 1, characterized in that It includes a second filter element, which is installed inside the fume hood frame. The oil mesh frame is located in a first direction of the second filter element. The second filter element is used to filter particulate matter with a diameter of 1 micrometer to 10 micrometers in the oil fumes.

6. The cyclone chimney according to claim 5, characterized in that The fume hood frame is provided with a first air duct inside. The fume hood frame, the oil mesh frame and the second filter element form the first air duct. The first air duct is used to receive the incoming oil fumes and guide the oil fumes to the second filter element.

7. The cyclone chimney according to claim 6, characterized in that It includes a third filter element, which is installed inside the fume hood frame, and a second filter element is located in a second direction of the third filter element. The third filter element is used to filter particulate matter from 0.1 micrometers to 1 micrometer.

8. The cyclone chimney according to claim 7, characterized in that The fume hood frame is provided with a second air duct inside, and the third filter, the second filter and the fume hood frame form the second air duct.

9. The cyclone chimney according to claim 7, characterized in that The fume hood frame is provided with a third air duct inside, and the third filter element is located in the second direction of the fan. The third filter element, the fan and the fume hood frame form the third air duct.

10. The cyclone chimney according to claim 1, characterized in that Includes a smoke hood, which is installed on the fan, which is located in a first direction of the smoke hood, and the fan is used to exhaust gas from the smoke hood frame.

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