Air duct structure, range hood, and cooktop and range hood integrated machine

Abstract

An air duct structure, a range hood, and a cooktop and range hood integrated machine. The air duct structure comprises an air guide housing (10), a partition plate (20), and a grease filter member (30); the air guide housing (10) is provided with an air inlet (110); the partition plate (20) is arranged below the air inlet (110) in a gravity direction (X), and divides the interior of the air guide housing (10) into a grease separation cavity (120) and an air return cavity (130) which are communicated with each other; the air return cavity (130) is used for accommodating a fan (2) of a range hood; main air discharge ports (100) are formed for at least one of the air guide housing (10) and the partition plate (20); the partition plate (20) is provided with flow dividing air ports (200); and the grease filter member (30) is provided in the grease separation cavity (120) and is used for filtering an airflow entering the grease separation cavity (120) from the air inlet (110).

Description

Air duct structure, range hood and hob-integrated machine

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese Patent Application No. 202411337546.6, filed on September 25, 2024, entitled "Heating Pump and Dishwasher", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of range hoods, and in particular to an air duct structure, a range hood and a hob-integrated machine. BACKGROUND

[0004] In order to improve the smoke absorption efficiency and liberate the space above the cooking hob, in a lower exhaust type hob-integrated machine, the range hood is arranged below the cooking hob, the air inlet and the fan of the range hood are arranged below the cooking hob operation plane, and a baffle is arranged between the air inlet and the fan to block food residues, oil droplets and other sundries entering from the air inlet during cooking.

[0005] In order to adapt to the scene where the oil fume cannot be exhausted, the baffle also plays a role of forced flow guiding, and forces the airflow entering the range hood to flow to both sides of the baffle and pass through the purification structure, so as to remove the oil fume and other pollutants in the airflow, so that the gas exhausted by the range hood can return to the cooking environment, and the range hood realizes internal circulation. However, in the scene where the oil fume can be exhausted, the range hood does not need to be equipped with a purification structure. SUMMARY

[0006] The present application provides an air duct structure, a range hood and a hob-integrated machine.

[0007] In a first aspect, the present application provides an air duct structure for a range hood, the air duct structure comprising a wind guide shell, a baffle and an oil filter, the wind guide shell having an air inlet; the baffle is arranged below the air inlet in the direction of gravity and separates the internal space of the wind guide shell into an oil separation chamber and an air return chamber in communication, the air return chamber is used for accommodating a fan of the range hood, at least one of the wind guide shell and the baffle forms a main air outlet, and the baffle has a shunt air inlet; the oil filter is arranged in the oil separation chamber and is used for filtering the airflow entering the oil separation chamber from the air inlet; wherein the air duct structure has an internal circulation mode and an external exhaust mode: in the external exhaust mode, part of the airflow filtered by the oil filter enters the air return chamber through the main air outlet, and another part of the airflow enters the air return chamber through the shunt air inlet; in the internal circulation mode, the oil filter comprises a flow resistance part, the flow resistance part blocks the shunt air inlet, and all the airflow filtered by the oil filter enters the air return chamber through the main air outlet.

[0008] In some embodiments, the air inlet has an air inlet central axis; the partition plate includes a plurality of plate bodies, which gradually move away from the air inlet along a first horizontal direction towards the air inlet central axis, and are at least partially inclined to a side away from the air inlet, and two adjacent plate bodies are spaced apart along a gravity direction and partially overlap to form the flow distribution air inlet connecting the oil separation cavity and the return air cavity.

[0009] In some embodiments, the overlapping part of two adjacent plate bodies along the gravity direction has an overlapping width L in the first horizontal direction, and L satisfies 3mm≤L≤10mm.

[0010] In some embodiments, one of the plurality of plate bodies is a first plate body, which is located at the air inlet central axis and is inclined to a side of the air inlet from the air inlet central axis along a first horizontal direction away from the air inlet central axis.

[0011] In some embodiments, the partition plate includes two plate bodies, one of which is a second plate body, which is located at a side of the first plate body towards the air inlet along the gravity direction; and at least part of the second plate body is inclined to a side of the first plate body along a first horizontal direction towards the air inlet central axis, and forms an oil guide opening corresponding to the first plate body, so that fluid on the second plate body flows to the first plate body through the oil guide opening.

[0012] In some embodiments, the partition plate further includes a support portion, which is arranged at the flow distribution air inlet and connected between two adjacent plate bodies spaced apart along the gravity direction.

[0013] In some embodiments, the oil filter includes an oil receiving shell arranged in the oil separation cavity and mounted on the air guide shell, the oil receiving shell has an oil receiving main plate arranged below the air inlet along the gravity direction, and the flow resistance portion is arranged at a side of the oil receiving main plate away from the air inlet; and an oil filter screen mounted on the oil receiving shell and arranged between the air inlet and the oil receiving main plate to filter air flow entering the oil separation cavity from the air inlet.

[0014] In some embodiments, the flow resistance portion is detachably mounted on the oil receiving shell; or in the internal circulation mode, the flow resistance portion is integrally arranged on the oil receiving shell.

[0015] In some embodiments, the air duct structure includes two air outlet plates, which are arranged at opposite sides of the air inlet along a first horizontal direction, and each air outlet plate has a main return air inlet connecting the oil separation cavity and the return air cavity.

[0016] In some embodiments, the air duct structure further comprises a filter, which is arranged at the main air outlet and detachably mounted to the air outlet plate to filter the airflow passing through the main air outlet.

[0017] In some embodiments, the air outlet plate is arranged at a side of the filter away from the air inlet and used to stop the filter, the air outlet plate comprises: two first stop portions, one of which is connected to the inner wall of the air guide shell, and the other of which is connected to the plate body close to the air inlet in the direction of gravity, the two first stop portions are oppositely arranged in the direction of gravity and extend towards each other, the height of the first stop portion in the direction of gravity is h1, and h1 satisfies: 0mm≤h1≤1.5mm; and two second stop portions, each of which is connected between the two first stop portions, the two second stop portions are oppositely arranged in a second horizontal direction and extend towards each other, the height of the second stop portion in the second horizontal direction is h2, and h2 satisfies: 3mm≤h2≤5mm; wherein, along the first horizontal direction, the filter is at least partially connected to the first stop portion and the second stop portion, and the first horizontal direction is perpendicular to the second horizontal direction.

[0018] In some embodiments, the air outlet plate further comprises a plurality of stop protrusions, which are spaced apart along the second horizontal direction and connected to the first stop portion, and the filter is at least partially connected to the stop protrusions.

[0019] In a second aspect, the embodiments of the present application provide an extractor hood, comprising the air duct structure and a fan, the fan is arranged in the air return cavity and below the partition plate in the direction of gravity.

[0020] In a third aspect, the embodiments of the present application provide a combination of a range hood and a stove, comprising a stove and an extractor hood as described above, the stove has at least one cooking module, the extractor hood is arranged below the stove in the direction of gravity, and the air duct structure of the extractor hood is arranged below the at least one cooking module in the direction of gravity.

[0021] According to the air duct structure, the range hood and the oven range all-in-one machine, the air inlet of the air guide shell, the baffle and the fan are sequentially arranged from top to bottom along the gravity direction, at least one of the air guide shell and the baffle forms a main air outlet, and the baffle has a shunt air outlet. In the embodiment of the present application, the user can select the mode of the air duct structure according to different use scenarios: in the external exhaust mode, the shunt air outlet is communicated with the oil separation chamber and the return air chamber, part of the airflow enters the return air chamber from the main air outlet, and another part of the airflow enters the return air chamber through the shunt air outlet. In this way, the air inlet path between the oil separation chamber and the return air chamber is increased, the air inlet path through the shunt air outlet into the return air chamber is shorter, which helps to reduce the air resistance; after the airflow hits the baffle, part of the airflow is guided to flow to the return air chamber from the shunt air outlet, the separation of the airflow is reduced, and thus the vortex and the turbulent flow are improved. In this way, a more uniform and stable airflow distribution is formed in the air duct structure in the external exhaust mode, the noise of the air duct structure is improved, and the oil smoke suction and exhaust efficiency is improved. In the internal circulation mode, the flow resistance part of the oil filter is blocked in the shunt air outlet, and all the airflow enters the return air chamber from the main air outlet. The filter is installed between the air inlet and the main air outlet, so that the oil smoke can be filtered, and internal circulation exhaust is realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] FIG. 1 is a structural schematic diagram of a range hood according to an embodiment of the present application;

[0024] FIG. 2 is a perspective sectional view of an air duct structure in an external exhaust mode according to an embodiment of the present application;

[0025] FIG. 3 is a perspective sectional view of an air duct structure in an internal circulation mode according to an embodiment of the present application;

[0026] FIG. 4 is a sectional view of an air duct structure in an external exhaust mode according to an embodiment of the present application;

[0027] FIG. 5 is a local enlarged view of B in FIG. 2;

[0028] FIG. 6 is a local schematic view of an air duct structure according to an embodiment of the present application;

[0029] FIG. 7 is a sectional view of an air duct structure in an internal circulation mode according to an embodiment of the present application;

[0030] FIG. 8 is a local enlarged view of C in FIG. 3;

[0031] Figure 9 is a structural schematic diagram of an oil filter element according to an embodiment of this application;

[0032] Figure 10 is a structural schematic diagram of another oil filter element according to an embodiment of this application;

[0033] Reference numerals: 1. Duct structure; 2. Fan; 3. Outer shell; 10. Air guide shell; 20. Partition; 30. Oil filter; 50. Filter element; 21. First plate; 22. Second plate; 23. Support; 31. Flow obstruction; 32. Oil receiving shell; 33. Oil filter screen; 41. Air outlet; 100. Main exhaust port; 110. Air inlet; 111. Air inlet center axis; 120. Oil separation chamber; 130. Return air chamber; 200. Diverter air outlet; 321. Oil receiving main plate; 322. Oil receiving side plate; 411. First stop; 412. Second stop; 413. Stop protrusion; X. Gravity direction; Y. First horizontal direction; Z. Second horizontal direction. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] In some downdraft range hoods and cooktops, the fan is positioned directly below the air inlet. To prevent food residue, oil droplets, and other debris from falling into the fan and causing contamination or damage, a baffle is commonly installed between the air inlet and the fan. Simultaneously, the baffle in a downdraft range hood and cooktop also acts as a forced airflow guide. The range hood has purification structures installed in the air ducts located on both sides of the baffle. The baffle forces the airflow entering the range hood to flow to the sides and pass through the purification structures, thus removing oil fumes and other pollutants from the airflow. This allows the exhaust gas to return to the cooking environment, achieving internal circulation. This type of downdraft range hood and cooktop is well-suited for scenarios without a shared exhaust duct and where external exhaust is not possible. However, in scenarios where external exhaust is possible, its extraction efficiency is limited by the filtration structure and baffle, resulting in poor smoke extraction.

[0036] The inventor found that in a scene where oil fume can be exhausted, the baffle easily blocks the airflow, so that the airflow of the air inlet cannot directly flow to the fan, but needs to bypass the baffle to reach the fan, increasing the resistance of the air inlet path, causing the air volume to decrease, affecting the suction and exhaust effect of the oil fume, and generating higher noise. In addition, when the range hood is running, the flow direction and flow rate of the airflow change sharply after hitting the baffle, and the airflow separates near the baffle, part of the airflow backflows, and interferes with the airflow flowing from the air inlet to the baffle, forming a vortex, which increases the turbulence of the airflow, and at the same time, the fan needs to increase the working load to overcome the increased air inlet resistance, which will produce higher operating noise, and adversely affect the user's cooking experience.

[0037] To solve the above problems in the related art, the embodiment of the present application provides a duct structure, a range hood and a hood-stove integrated machine. In the direction of gravity, the air inlet of the air guide shell, the baffle and the fan are sequentially arranged from top to bottom. At least one of the air guide shell and the baffle forms a main exhaust outlet. The baffle has a shunt air outlet, and the oil filter element is selectively provided with a flow resistance part for plugging the shunt air outlet, so that the duct structure can realize an internal circulation mode and an external exhaust mode. In the external exhaust mode, the shunt air outlet communicates the oil separation chamber and the return air chamber, a part of the airflow enters the return air chamber from the main exhaust outlet, and another part of the airflow enters the return air chamber through the shunt air outlet. It is suitable for a scene where oil fume can be exhausted. The air inlet path between the oil separation chamber and the return air chamber is increased, the air inlet path into the return air chamber through the shunt air outlet is shorter, which helps to reduce the air resistance. After the airflow hits the baffle, part of the airflow is guided to flow from the shunt air outlet to the return air chamber, reducing the separation of the airflow, thereby improving the vortex and turbulence. In this way, a more uniform and stable airflow distribution is formed in the duct structure in the external exhaust mode, the noise of the duct structure is improved, and the suction and exhaust efficiency of the oil fume is improved.

[0038] In the internal circulation mode of the duct structure, the flow resistance part of the oil filter element plugs the shunt air outlet, and all the airflow enters the return air chamber from the main exhaust outlet. The filter element is installed between the air inlet and the main exhaust outlet, which can filter the oil fume and realize internal circulation exhaust. Compared with the closed baffle of the lower exhaust type hood-stove integrated machine in the related art, the baffle in the present application has a shunt air outlet, and a flow resistance part is selectively arranged in the oil filter element, so that the duct structure has an internal circulation mode and an external exhaust mode, so that the user can select different modes based on different use scenes.

[0039] Referring to FIG. 1-3, FIG. 1 is a structural schematic diagram of a range hood according to an embodiment of the present application, a sectional view of a wind channel structure 1 of an external exhaust mode along A-A is shown in FIG. 2, and a sectional view of a wind channel structure 1 of an internal circulation mode along A-A is shown in FIG. 3. The wind channel structure 1 is used in a range hood, and the wind channel structure 1 includes a wind guide shell 10 and a baffle 20. The wind guide shell 10 has an air inlet 110. The baffle 20 is arranged below the air inlet 110 in a gravity direction X, and separates an internal space of the wind guide shell 10 into an oil separation chamber 120 and a return air chamber 130 in communication. The oil separation chamber 120 is in communication with the air inlet 110, and the return air chamber 130 is used to accommodate a fan 2 of the range hood. The fan 2 is located below the baffle 20 in the gravity direction X. In a specific implementation, the wind channel structure 1 is arranged at the rear of the range hood, and the air inlet 110 is located below a cooking module of a cooking bench. Oil fume generated during cooking is introduced into the wind channel structure 1 from the air inlet 110 under the action of the fan 2, which effectively shortens the rising path of the oil fume, helps to improve the capture rate and smoke suction efficiency of the oil fume, and reduces the diffusion of the oil fume in the cooking environment.

[0040] In the embodiment of the present application, the wind channel structure 1 has a main exhaust port 100 and a shunt air port 200 which are in communication with the oil separation chamber 120 and the return air chamber 130. When the shunt air port 200 is unblocked, the main exhaust port 100 is the main air flow passage between the oil separation chamber 120 and the return air chamber 130, and is arranged at one side of the air inlet 110 along a first horizontal direction Y. Most of the oil fume gas flow that has been preliminarily separated will pass through the main exhaust port 100 and enter the return air chamber 130. The shunt air port 200 is an auxiliary air flow passage between the oil separation chamber 120 and the return air chamber 130, and is arranged on the baffle 20 to reduce the wind resistance of the baffle 20. Part of the oil fume gas flow that has been preliminarily separated is dispersed and guided to the shunt air port 200 and then enters the return air chamber 130, so that the air flow distribution is more uniform.

[0041] Referring to FIG. 4-5, FIG. 4 is a sectional view of a wind channel structure 1 of an external exhaust mode according to an embodiment of the present application, and FIG. 5 is an enlarged view of a portion B in FIG. 2. The air inlet 110 has an air inlet center axis 111. The baffle 20 includes a plurality of plate bodies. Adjacent two plate bodies are arranged in a spaced manner in the gravity direction X to form the shunt air port 200 which is in communication with the oil separation chamber 120 and the return air chamber 130. The design of the shunt air port 200 increases the air inlet path between the oil separation chamber 120 and the return air chamber 130, and the air inlet path from the shunt air port 200 to the return air chamber 130 is shorter, which helps to reduce the wind resistance. After the air flow entering the oil separation chamber 120 from the air inlet 110 hits the baffle 20, part of the air flow is guided to flow to the return air chamber 130 from the shunt air port 200, which reduces the separation of the air flow, thereby improving the vortex and turbulent flow, so that a more uniform and stable air flow distribution is formed in the wind channel structure 1, and the noise of the wind channel structure 1 is improved.

[0042] In the gravity direction X, the adjacent two plate body parts overlap, so that there is no gap between the multiple plate bodies in the first horizontal direction Y, and the baffle 20 can effectively shield between the air inlet 110 and the fan 2. In the first horizontal direction Y towards the air inlet center axis 111, the multiple plate bodies gradually move away from the air inlet 110, and at least part of each plate body is inclined to the side away from the air inlet 110. After the airflow flows to the baffle 20, part of the airflow flows on the plate surface of each plate body towards the side away from the air inlet 110, and then enters the return air chamber 130 from the shunt air inlet 200. The condensate on the plate surface of each plate body and the oil accumulated after a long time use, the water and oil flow in the direction away from the air inlet 110 under the action of gravity, and then drop to the plate body below, without polluting the fan 2.

[0043] In the gravity direction X, the overlapping width of the overlapping part of the adjacent two plate bodies in the first horizontal direction Y is L, and L satisfies: 3mm≤L≤10mm. If L<3mm, the overlapping width of the overlapping part of the adjacent two plate bodies in the first horizontal direction Y is too small, and the oil and condensate formed on the plate surface of each plate body is easy to drop into the return air chamber 130 under the disturbance of the airflow, polluting the fan, and even affecting the normal operation and service life of the fan; if L>10mm, the overlapping width of the overlapping part of the adjacent two plate bodies in the first horizontal direction Y is too large, and the path of the airflow entering the return air chamber 130 from the shunt air inlet 200 is longer, which will increase the resistance of the airflow, causing the airflow to be not smooth, which is contrary to the original intention of reducing the air resistance through the shunt air inlet 200.

[0044] Please continue to refer to FIGS. 4-5, one of the multiple plate bodies is a first plate body 21, which can be seen that the first plate body 21 is located at the bottom layer of the multiple plate bodies. The first plate body 21 is located at the air inlet center axis 111, and in the first horizontal direction Y away from the air inlet center axis 111, the first plate body 21 is inclined from the air inlet center axis 111 to the side where the air inlet 110 is located, that is, in the direction from the center area to the edge area of the first plate body 21, the first plate body 21 gradually inclines to the side where the air inlet is located, so that the first plate body 21 forms an inwardly concave upper plate surface and can store a certain amount of oil and condensate.

[0045] The baffle 20 comprises two plate bodies, one of which is a second plate body 22, which is arranged on the side of the first plate body 21 facing the air inlet 110 along the gravity direction X. At least part of the second plate body 22 is inclined toward the side of the first plate body 21 along the horizontal direction Y toward the air inlet center axis 111, and forms an oil guide opening corresponding to the first plate body 21, so that the fluid on the second plate body 22 flows to the first plate body 21 through the oil guide opening. During the oil fume separation process, the oil and condensed water attached to the surface of the second plate body 22 are collected and stored in the low-lying part of the first plate body 21 under the action of gravity, and the liquid collected in the first plate body 21 will not easily overflow into the air return cavity 130.

[0046] In some embodiments, the second plate body 22 comprises a plurality of sub-plate bodies, each of which is inclined toward the side of the first plate body 21 and partially overlaps the first plate body 21 along the gravity direction X. Taking the air duct structure 1 shown in FIGS. 1-2 as an example, the air duct structure 1 comprises two main air outlets 100 arranged on both sides of the air inlet 110 along the first horizontal direction Y, in order to ensure the uniformity of the flow field in the oil separation cavity 120, the second plate body 22 comprises two sub-plate bodies, which are arranged on both sides of the oil guide opening along the first horizontal direction Y, and each sub-plate body and the first plate body 21 form a shunt air outlet 200. During the oil fume separation process, the oil and condensed water on the two sub-plate bodies flow along the surface of the sub-plate bodies under the action of gravity, and are collected and stored in the low-lying part of the first plate body 21.

[0047] Alternatively, the second plate body 22 can also comprise four sub-plate bodies, two of which are arranged on both sides of the oil guide opening along the first horizontal direction Y, and the other two are arranged on both sides of the oil guide opening along the second horizontal direction Z, so that the four sub-plate bodies and the first plate body 21 form four shunt air outlets 200, and the oil and condensed water on each sub-plate body can be guided to the first plate body 21.

[0048] Please refer to FIG. 6, which is a partial schematic view of an air duct structure 1 according to an embodiment of the present application. In the embodiment, the plurality of plate bodies of the baffle 20 are directly exposed to the airflow, which will be impacted and worn by the airflow during long-term operation. In order to enhance the structural strength of the baffle 20, the baffle 20 further comprises a support part 23, which is connected between adjacent two plate bodies arranged at intervals along the gravity direction X. Please refer to FIG. 3, which is a partial structural schematic view of an air duct structure 1 according to an embodiment of the present application. A plurality of support parts 23 are connected between adjacent two plate bodies arranged at intervals along the gravity direction X, and the plurality of support parts 23 are arranged at intervals along the second horizontal direction Z. The support parts 23 can effectively transfer and disperse the load, avoid deformation of the plate bodies due to airflow impact or self-weight, ensure the relative position stability of each plate body, and improve the overall structural stability and load-bearing capacity of the baffle 20.

[0049] Please refer to Figs. 4-5, the air duct structure 1 has an external exhaust mode, in which the shunt air outlet is unblocked, and a part of the airflow filtered by the oil filter 30 from the air inlet 110 enters the return air chamber 130 through the main air outlet 100, and another part of the airflow enters the return air chamber through the shunt air outlet 200. The main air outlet 100 ensures that most of the airflow can be smoothly exhausted, and the flow of the shunt air outlet 200 is relatively small, but it effectively disperses the air pressure and reduces the air resistance of the air duct structure 1, so as to increase the air volume.

[0050] It can be seen that, along the gravity direction X, the air guide shell 10 further comprises a shielding part provided between the main air outlet 100 and the fan 2, and the shielding part has a grid that can effectively disperse and uniformize the airflow flowing from the return air chamber 130 to the fan. This helps to reduce vortex and turbulence in the airflow and improve the stability and efficiency of the airflow. As a physical barrier, the grid can block large particles, insects and other foreign matters in the kitchen from entering the interior of the fan 2, especially in the external exhaust mode, to protect the fan 2 and other internal components from damage.

[0051] In the embodiment of the present application, the air duct structure 1 further comprises an oil filter 30, which is arranged in the oil separation chamber 120 and is used to filter the airflow entering the oil separation chamber 120 from the air inlet 110. The oil filter 30 has a flow blocking part 31, which is used to block the shunt air outlet 200, so that the air duct structure 1 realizes an internal circulation mode.

[0052] Please refer to Figs. 7-8, Fig. 7 is a sectional view of an air duct structure 1 in an internal circulation mode according to an embodiment of the present application, and Fig. 8 is an enlarged view of part C in Fig. 3. In the internal circulation mode, the flow blocking part 31 blocks the shunt air outlet 200, and all the airflow filtered by the oil filter 30 enters the return air chamber 130 through the main air outlet 100. Therefore, by arranging the filter 50 at the main air outlet 100, it can be ensured that all the airflow entering the return air chamber 130 passes through the filter 50 to filter the oil fume and other pollutants in the airflow, so that the gas exhausted by the air duct structure 1 can return to the cooking environment. Alternatively, the baffle 20 has a plurality of shunt air outlets 200, and the oil filter 30 comprises a plurality of flow blocking parts 31, which one by one correspond to the plurality of shunt air outlets 200.

[0053] Referring to FIG. 9, FIG. 9 is a structural schematic diagram of an oil filter 30 according to an embodiment of the present application. The oil filter 30 further comprises an oil receiving housing 32 and an oil filter screen 33. The oil receiving housing 32 is arranged in the oil separation chamber 120 and is mounted on the air guide housing 10. The oil receiving housing 32 has an oil receiving main plate 321 arranged below the air inlet 110 in the gravity direction X. The flow blocking part 31 is arranged on the side of the oil receiving main plate 321 away from the air inlet 110. The oil filter screen 33 is mounted on the oil receiving housing 32 and is arranged between the air inlet 110 and the oil receiving main plate 321 to filter the airflow entering the oil separation chamber 120 from the air inlet 110. Most of the oil stains and particulate matter are intercepted on the oil filter screen 33 by the interception of the oil filter screen 33. The oil stains intercepted by the oil filter screen 33 and the oil fume in the airflow can naturally settle on the oil receiving main plate 321 under the action of gravity, facilitating subsequent collection and treatment.

[0054] Specifically, the oil receiving housing 32 further comprises two oil receiving side plates 322 connected to the opposite sides of the oil receiving main plate 321 along the second horizontal direction Z. The oil receiving main plate 321 is located on the air inlet center axis 111. From the center area of the oil receiving main plate 321 to the edge area, the oil receiving main plate 321 gradually tilts to the side where the air inlet is located. The upper plate of the oil receiving main plate 321 is concave inward and forms an oil receiving groove together with the two oil receiving side plates 322. The oil receiving groove can effectively collect the oil stains dripping and leaking from the oil filter screen 33. In this way, the oil filter 30 can effectively filter, collect and guide the oil stains, reducing the oil accumulation in the partition plate 20. In the present application, the oil receiving housing 32 is detachably mounted on the air guide housing 10. The user can clean the oil stains in the oil receiving groove by detaching the oil receiving housing 32, thereby improving the cleanliness and maintenance convenience of the air duct structure 1.

[0055] It should be noted that the air duct structure 1 selects the external exhaust mode or the internal circulation mode by detaching or mounting the flow blocking part 31. As shown in FIGS. 9-10, FIG. 10 is a structural schematic diagram of another oil filter 30 according to an embodiment of the present application. The oil filter 30 has two forms. One form of the oil filter 30 is used to match the internal circulation mode. In this form, the flow blocking part 31 is integrally arranged on the oil receiving housing 32 to close the shunt air outlet 200. The other form of the oil filter 30 is used to match the external exhaust mode. The oil filter 30 is not configured with the flow blocking part 31, so that the airflow filtered by the oil filter 30 enters the return air chamber 130 from the main air outlet 100 and the shunt air outlet 200. In this way, the installer selects the mode of the air duct structure 1 by selecting and installing different forms of the oil filter 30, without the need for complex disassembly or adjustment work.

[0056] Optionally, the flow blocking part 31 is detachably installed on the oil receiving shell 32, and an installer can select the mode of the air duct structure 1 by detaching or installing the flow blocking part 31 in the oil filter 30. The components of one oil filter 30 can be disassembled to meet the requirements of different modes, thereby reducing the material cost and inventory cost.

[0057] In the embodiment, the main air outlet 100 is defined by the air outlet plate 41, and the air duct structure 1 includes two air outlet plates 41, which are arranged on opposite sides of the air inlet 110 along the first horizontal direction Y. This helps to form a symmetrical air flow distribution in the oil separation chamber, reduces vortex and dead angle, and each air outlet plate 41 has a main air outlet 100 that communicates the oil separation chamber 120 and the return air chamber 130.

[0058] Further, when the shunt air outlet 200 in the partition plate 20 is closed, the air flow flows to the two main air outlets 100 under the guidance of the partition plate 20. At this time, the filter 50 arranged at the main air outlet 100 can further filter the air flow flowing into the return air chamber 130, so as to meet the indoor exhaust requirements. The filter 50 is arranged at the main air outlet 100 and detachably installed on the air outlet plate 41, so as to filter the air flow passing through the main air outlet 100. Optionally, the filter 50 can be at least one of a grease filter and an odor filter, for example, the filter 50 can adopt activated carbon filter material.

[0059] The air outlet plate 41 is arranged on the side of the filter 50 away from the air inlet 110 and is used for limiting the filter 50. The air outlet plate 41 includes two first stop parts 411 and two second stop parts 412. After the oil filter 30 is disassembled, an installer or a user can install the filter 50 from the air inlet 110. The first stop part 411 and the second stop part 412 are used for stopping the filter 50 to avoid the filter 50 being installed out of position and falling into the return air chamber 130.

[0060] In a specific implementation, the connection structure of the air outlet plate 41 is determined according to the design position of the main air outlet 100. For example, in the air duct structure 1 shown in FIG. 1, the main air outlet 100 extends along the second horizontal direction Z, and the two main air outlets 100 are arranged opposite to each other along the first horizontal direction Y. At this time, the air guide shell 10 and the partition plate 20 jointly define the air outlet plate 41.

[0061] Specifically, the air guide shell 10 further has a top wall opposite to the second plate body 22 along the gravity direction X, one of the two first stop portions 411 is connected to the top wall of the air guide shell 10, and the other is connected to the second plate body 22, the two first stop portions 411 are oppositely arranged along the gravity direction X and extend towards each other, the height of the first stop portion 411 along the gravity direction X is h1, wherein h1 satisfies: 0mm≤h1≤1.5mm, so that the first stop portion 411 forms an effective physical barrier, while avoiding that the first stop portion 411 is too high to block the air duct.

[0062] The second stop portion 412 is connected between the two first stop portions 411, the air guide shell 10 has two side walls oppositely arranged along the second horizontal direction Z, the second stop portion 412 is connected to the side wall of the air guide shell 10, the two second stop portions 412 are oppositely arranged along the second horizontal direction Z and extend towards each other, the height of the second stop portion 412 along the second horizontal direction Z is h2, wherein h2 satisfies: 3mm≤h2≤5mm, so that the second stop portion 412 provides lateral stop for the filter piece 50, as can be seen from FIG. 6, the length of the filter piece 50 along the second horizontal direction Z is greater than that along the gravity direction X, and the filter piece 50 is more likely to deform in the second horizontal direction Z during installation and use, therefore, h2>h1 in the present application, so as to prevent the filter piece 50 from loosening or falling into the return air cavity 130 due to installation deformation, use vibration or air flow impact. The first horizontal direction Y is perpendicular to the second horizontal direction Z.

[0063] In other embodiments, the air guide shell 10 can also form the air outlet plate 41, or the partition plate 20 forms the air outlet plate 41.

[0064] In an embodiment of the present application, the air outlet plate 41 further includes a plurality of stop protrusions 413, the plurality of stop protrusions 413 are spaced apart along the second horizontal direction Z, and the plurality of stop protrusions 413 are connected to the first stop portion 411. The stop protrusion 413 further provides physical blocking for the filter piece 50 to prevent it from being pushed too deep during installation, and when the filter piece 50 is subjected to air flow, the stop protrusion 413 also plays a role in dispersing the force, reducing the risk of damage to the air outlet plate 41 due to excessive local stress. The first stop portion 411, the second stop portion 412 and the stop protrusion 413 jointly form a stable stop system.

[0065] The application further provides an extractor hood, which comprises the air duct structure 1, the fan 2 and a housing 3. The housing 3 protects the internal components and prevents external dust, water vapor and other impurities from entering the interior of the extractor hood. The air duct structure 1 is arranged in the internal space of the housing 3. The fan 2 provides necessary power for the suction and discharge of the oil fume. The fan 2 is arranged in the return air cavity 130 of the air duct structure 1. The fan 2 is driven to accelerate the flow of the oil fume in the air duct structure 1, thereby improving the processing efficiency. In the application, the fan 2 is located below the partition plate 20 along the gravity direction X, so as to avoid the oil stains and impurities from falling vertically from the air inlet 110 to the fan 2.

[0066] The application further provides a smoke stove integrated machine, which comprises a stove and the extractor hood. The stove has at least one cooking module, such as a gas stove or an electromagnetic oven, for cooking. The extractor hood is arranged below the stove along the gravity direction X. The air duct structure 1 of the extractor hood is arranged below the at least one cooking module, so as to effectively capture and process the oil fume generated in the cooking process.

[0067] In the drawings of the application, the same or similar reference numerals correspond to the same or similar components; in the description of the application, it should be understood that the orientations or positional relationships indicated by the terms “upper”, “lower”, “left”, “right” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0068] The above description is only the preferred embodiment of the application and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A wind channel structure for a range hood, the wind channel structure comprising: a wind guide housing having an air inlet; a partition plate arranged below the air inlet in a gravity direction and separating an interior space of the wind guide housing into an oil separation chamber and an air return chamber in communication, the air return chamber being configured to accommodate a fan of the range hood, at least one of the wind guide housing and the partition plate forming a main air outlet, the partition plate having a shunt air outlet; and an oil filter arranged in the oil separation chamber and configured to filter air flow entering the oil separation chamber from the air inlet; wherein the wind channel structure has an internal circulation mode and an external exhaust mode: in the external exhaust mode, a portion of the air flow filtered by the oil filter enters the air return chamber from the main air outlet, and another portion of the air flow enters the air return chamber from the shunt air outlet; in the internal circulation mode, the oil filter comprises a flow blocking portion, the flow blocking portion blocks the shunt air outlet, and all of the air flow filtered by the oil filter enters the air return chamber from the main air outlet. the air inlet has an air inlet central axis; 2. The air duct structure according to claim 1, wherein the partition plate comprises a plurality of plate bodies, in a first horizontal direction towards the air inlet central axis, the plurality of plate bodies gradually move away from the air inlet, and the plate bodies are at least partially inclined to a side away from the air inlet, two adjacent plate bodies are arranged apart in the gravity direction and partially overlap to form the shunt air outlet in communication with the oil separation chamber and the air return chamber. in the gravity direction, an overlapping width of the overlapping portion of the two adjacent plate bodies in the first horizontal direction is L, and L satisfies: 3mm≤L≤10mm.

3. The air duct structure according to claim 2, wherein one of the plurality of plate bodies is a first plate body, the first plate body is located on the air inlet central axis, and in a first horizontal direction away from the air inlet central axis, the first plate body is inclined to a side of the air inlet from the air inlet central axis.

4. The air duct structure according to claim 2 or 3, wherein the partition plate comprises two plate bodies, the other of the two plate bodies is a second plate body, in the gravity direction, the second plate body is arranged on a side of the first plate body away from the air inlet; 5. The air duct structure according to claim 4, wherein in the first horizontal direction towards the air inlet central axis, at least a portion of the second plate body is inclined to a side of the first plate body, and forms an oil guide opening corresponding to the first plate body, so that fluid on the second plate body flows to the first plate body through the oil guide opening. the partition plate further comprises a support portion arranged at the shunt air outlet and connected between two adjacent plate bodies arranged apart in the gravity direction.

6. The air duct structure according to any one of claims 2-5, wherein, the oil filter comprises:

7. The air duct structure according to any one of claims 1-6, wherein, an oil receiving housing arranged in the oil separation chamber and mounted on the wind guide housing, the oil receiving housing having an oil receiving main plate arranged below the air inlet in the gravity direction, the flow blocking portion being arranged on a side of the oil receiving main plate away from the air inlet; and an oil filter screen mounted on the oil receiving housing and arranged between the air inlet and the oil receiving main plate to filter air flow entering the oil separation chamber from the air inlet. 8.The wind channel structure according to claim 7, wherein the flow blocking portion is detachably mounted on the oil receiving housing; or in the internal circulation mode, the flow blocking portion is integrally arranged on the oil receiving housing. ​ 9. The air duct structure of any one of claims 2-8, wherein, The air duct structure comprises two air outlet plates, which are arranged on opposite sides of the air inlet along a first horizontal direction, and each air outlet plate has the main air outlet communicating with the oil separation chamber and the return air chamber.

10. The air duct structure according to claim 9, wherein The air duct structure further comprises a filter element arranged at the main air outlet and detachably mounted on the air outlet plate to filter the airflow passing through the main air outlet.

11. The air duct structure according to claim 10, wherein, The air outlet plate is arranged on a side of the filter element away from the air inlet and is used to stop the filter element, and the air outlet plate comprises: two first stop portions, one of which is connected to the inner wall of the air guide shell, and the other is connected to the plate body close to the air inlet in the direction of gravity, the two first stop portions are oppositely arranged in the direction of gravity and extend towards each other, the height of the first stop portion in the direction of gravity is h1, and h1 satisfies: 0mm≤h1≤1.5mm; and two second stop portions, each second stop portion is connected between the two first stop portions, the two second stop portions are oppositely arranged in a second horizontal direction and extend towards each other, the height of the second stop portion in the second horizontal direction is h2, and h2 satisfies: 3mm≤h2≤5mm; Wherein, along the first horizontal direction, the filter element is at least partially connected to the first stop portion and the second stop portion, and the first horizontal direction is perpendicular to the second horizontal direction.

12. The air duct structure of claim 11, wherein, The air outlet plate further comprises a plurality of stop protrusions, and the stop protrusions are arranged in the second horizontal direction and connected to the first stop portion, wherein the filter element is at least partially connected to the stop protrusions.

13. A range hood, comprising: The air duct structure according to any one of claims 1-12; And A fan arranged in the return air chamber and below the partition plate in the direction of gravity.

14. A combination of a smoke hood and a stove, comprising: A stove top having at least one cooking module; And The range hood according to claim 13, arranged below the stove top, and the air duct structure of the range hood is arranged below the at least one cooking module in the direction of gravity.

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