An oil mist interception module and a range hood comprising the same

Abstract

The present application provides an oil mist interception module and a range hood comprising the same, the oil mist interception module comprising a base body, an impeller and an interception disc unit, the impeller and the interception disc unit being coaxially arranged on both sides of the base body and being fixed along the axial direction, the impeller being capable of driving the interception disc unit to rotate synchronously after being affected by the airflow from the side of the interception disc unit, and the base body being used for connecting with the inner wall of the range hood cabinet to fix the oil mist interception module between the fan of the range hood and the smoke inlet of the smoke collecting cavity. The present application can drive the impeller to rotate by means of the airflow flowing after the fan of the range hood is turned on, and drive the interception disc unit to rotate synchronously by the impeller, and with the change of the rotating speed of the fan of the range hood, the impeller can also timely drive the interception disc unit to change the rotating speed, having good self-adaptive adjustment function, simple structure, high transmission efficiency, high response sensitivity and good versatility.

Description

Technical Field

[0001] This invention relates to the field of range hood equipment technology, and in particular to an oil mist interception module and a range hood including the same. Background Technology

[0002] Currently, the common method for dealing with cooking fumes in the kitchen is to use range hoods to intercept, separate, and collect the oil fume particles into an oil cup, thereby purifying the indoor environment. However, due to the high viscosity of grease, after a period of operation, the impeller and volute inside the range hood easily accumulate and adhere to condensed grease, making them difficult to clean. Furthermore, if not cleaned regularly, grease and grease films will form, reducing the performance of the fan and increasing the probability of fumes escaping.

[0003] To address this, an improved solution has emerged: a rotating oil mist interception disc is installed at the air inlet of the range hood. The oil mist interception disc increases the speed difference between its spokes and grease particles by rotating at high speed, thereby increasing the probability of collision. The intercepted grease particles are thrown out to the outer edge by the spokes under the action of centrifugal force and then collected. This can improve the oil fume separation efficiency of the range hood, maintain the performance of the back-end fan, and reduce or even eliminate the cleaning work of the back-end fan. As a result, it has been widely adopted.

[0004] Currently, the rotation of rotatable oil mist interception discs used in household range hoods is mainly driven by a motor drive shaft, or coaxially mounted with the fan motor, with the motor jointly driving the fan impeller and the interception disc, or a separate motor is used for driving. In the former case, because the impeller and interception disc are driven by the same motor, the speed of the interception disc can only be the same as the impeller, and cannot be adjusted according to the operating conditions of the range hood. Furthermore, different fans have different inlet diameters, resulting in poor versatility for this type of interception disc. The latter method requires an additional motor, increasing material costs and overall energy consumption, making it less economical overall. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an oil mist interception module and a range hood including the same, to solve the problems of existing household range hoods having rotatable oil mist interception discs that cannot be adjusted according to the operating conditions of the range hood, poor versatility, high cost and energy consumption.

[0006] To solve the above-mentioned technical problems, the technical solution used in this invention is as follows:

[0007] The present invention discloses an oil mist interception module, comprising a base, an impeller, and an interception disc unit. The impeller and the interception disc unit are rotatably coaxially disposed on both sides of the base, and both the impeller and the interception disc unit are fixed along their axial direction. When the impeller is subjected to airflow from the interception disc unit side, it can drive the interception disc unit to rotate synchronously. The base is also used to connect with the inner wall of the range hood cabinet to fix the oil mist interception module between the range hood fan and the smoke inlet of the smoke collection chamber.

[0008] Preferably, the interception disc unit includes an interception disc, which includes a concentric central ring and an outer ring. One or more intermediate rings are concentrically arranged between the central ring and the outer ring. The intermediate rings have different diameters. Radially diverging interception spokes are arranged circumferentially between the central ring and adjacent intermediate rings, between two adjacent intermediate rings, and between the outer ring and adjacent intermediate rings.

[0009] More preferably, the intercepting spokes are all smooth curves that bulge in the rotation direction of the intercepting disc unit, and the number of the intercepting spokes increases sequentially from the central ring to the outer ring.

[0010] More preferably, at least two skeleton spokes extending to and connected to the outer ring are uniformly arranged around the periphery of the central ring. The skeleton spokes are smooth curves that bulge in the rotation direction of the interceptor disc unit, and the width of the skeleton spokes is greater than the width of the interceptor spokes.

[0011] More preferably, the interceptor disc unit is provided with at least two layers of interceptor discs spaced apart along its axial direction, the interceptor discs are relatively fixed in both the axial and circumferential directions, and the interceptor spokes of adjacent interceptor discs are staggered in the axial projection; and / or, the interceptor disc is a thin plate stamping type.

[0012] More preferably, the interceptor disc unit includes a mounting shaft and fasteners. A spacer plate perpendicular to its axial direction is provided on the outer periphery of the mounting shaft. The central rings of two adjacent interceptor discs pass through both ends of the mounting shaft and are located on both sides of the spacer plate. The central rings of the adjacent interceptor discs are tightly connected to the spacer plate by the fasteners.

[0013] More preferably, the base is provided with a groove, and a bearing is disposed in the groove; the impeller includes a guide cap, a connecting shaft and a plurality of blades, the blades being evenly disposed around the circumference of the guide cap, the guide cap being sleeved on one end of the connecting shaft, and the other end of the connecting shaft being axially fixed by a fastening nut after sequentially passing through the bearing and the mounting shaft, the mounting shaft and the guide cap abutting against the inner ring of the bearing, and the outer ring of the bearing abutting against the groove.

[0014] More preferably, the substrate is plate-shaped, and each side of the substrate is provided with a folded edge for detachable connection with the inner wall of the range hood cabinet. The plate surface of the substrate is bent and extended towards the impeller to form a guide ring like the side of a frustum. The end of the guide ring with a smaller diameter is close to the blade, and this end is provided with the groove. The groove is provided with reinforcing ribs that extend radially along this end at intervals around it. The reinforcing ribs extend to the guide ring and smoothly transition to the guide ring.

[0015] More preferably, the intercepting disk furthest from the blade extends beyond the guide ring, and the diameter of the intercepting disk is larger than the diameter of the larger diameter end of the guide ring.

[0016] Another object of the present invention is to provide a range hood, including a cabinet, a fan, a smoke hood, an oil cup, and a smoke collection chamber. The smoke collection chamber is provided with a smoke inlet, and the smoke inlet is provided with a filter screen. The upper end of the cabinet is provided with a smoke exhaust port, and the lower end of the cabinet is inserted into the smoke collection chamber directly opposite the smoke inlet and is detachably connected to the smoke inlet. The top plate of the smoke collection chamber is detachably connected to the cabinet. The fan is disposed in the cabinet, the smoke hood is located above the cabinet, the air outlet of the fan and the air inlet of the smoke hood are both directly opposite the smoke exhaust port and are detachably connected to the cabinet at the smoke exhaust port respectively. The oil cup is detachably disposed at the lowest end of the smoke collection chamber. The range hood also includes the aforementioned oil mist interception module, which is horizontally disposed in the cabinet above the smoke inlet, and the impeller of the oil mist interception module is located above the interception disc unit.

[0017] Compared with the prior art, the main advantages of the oil mist interception module of the present invention are as follows:

[0018] The oil mist interception module of this invention is set between the smoke inlet of the range hood fan and the smoke collection chamber. The impeller and the interception disc unit are rotatably coaxially arranged on both sides of the base. When the impeller is subjected to airflow from the interception disc unit side, it can drive the interception disc unit to rotate synchronously. This invention can drive the impeller to rotate by the airflow after the range hood fan is turned on, and drive the interception disc unit to rotate synchronously by the impeller. Moreover, as the speed of the range hood fan changes, the impeller can also drive the interception disc unit to change its speed in a timely manner according to the change of airflow velocity. It has a good adaptive adjustment function. There is no need to set up a separate drive mechanism for the impeller and the interception disc unit. There is no complicated transmission mechanism between the impeller and the interception disc unit. The structure is simple and the cost is low. There is almost no transmission loss between the impeller and the interception disc unit, resulting in high transmission efficiency and high response sensitivity.

[0019] The modular design of the oil mist interception module of this invention allows it to be installed inside the range hood cabinet using only the base. On the one hand, the cabinet has a large space, ensuring sufficient room for the impeller and interception disc unit with a large diameter, thus guaranteeing sufficient driving force. On the other hand, by simply changing the size of the base, the oil mist interception module can be applied to different models of range hoods, achieving a simple and low-cost modification method with good versatility.

[0020] Compared with existing technologies, the beneficial effects of the range hood described in this invention are mainly reflected in:

[0021] The range hood of the present invention uses the above-mentioned oil mist interception module, which has good oil mist interception performance, can protect the back-end fan from performance degradation due to oil accumulation, maintain the cleanliness and performance of the fan, enable the fan to maintain a longer service life, and does not increase the power of the range hood. Attached Figure Description

[0022] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0023] Figure 1 A three-dimensional structural diagram of an oil mist interception module provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A three-dimensional structural diagram of the interceptor disk unit;

[0025] Figure 3 for Figure 2 A three-dimensional structural diagram of the first interceptor disk in the middle;

[0026] Figure 4 for Figure 2 A three-dimensional structural diagram of the second interceptor disk in the middle;

[0027] Figure 5 for Figure 1 Exploded structure diagram;

[0028] Figure 6 This is a schematic diagram of the force decomposition of the blade cross section when airflow passes over the blade;

[0029] Figure 7 A longitudinal sectional view of a range hood provided in an embodiment of the present invention;

[0030] Figure 8 This is an exploded structural diagram of a range hood provided in an embodiment of the present invention;

[0031] Figure Description: Oil mist interception module 100, base 101, impeller 102, interception disc unit 103, interception disc 1, first interception disc 1-1, second interception disc 1-2, center ring 2, outer ring 3, intermediate ring 4, interception spokes 5, skeleton spokes 6, mounting shaft 7, spacer plate 8, rivet 9, groove 10, bearing 11, guide cap 12, connecting shaft 13, blade 14, folded edge 15, guide ring 16, reinforcing rib plate 17, cabinet 18, fan 19, smoke hood 20, oil cup 21, smoke collection chamber 22, filter screen 23, smoke exhaust port 24, smoke inlet 25. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 the present invention 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 limiting the present invention.

[0033] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0034] This embodiment provides an oil mist interception module 100, such as Figures 1 to 6 As shown, the system includes a base 101, an impeller 102, and an interception disc unit 103. The impeller 102 and the interception disc unit 103 are rotatably coaxially arranged on both sides of the base 101, and both the impeller 102 and the interception disc unit 103 are fixed along their axial direction. When the impeller 102 is subjected to airflow from the side of the interception disc unit 103, it can drive the interception disc unit 103 to rotate synchronously. The base 101 is also used to connect with the inner wall of the range hood cabinet 18 to fix the oil mist interception module 100 between the range hood fan 19 and the smoke inlet 25 of the smoke collection chamber 22.

[0035] The oil mist interception module 100 of this invention is disposed between the range hood fan 19 and the smoke inlet 25 of the smoke collection chamber 22. The impeller 102 and the interception disc unit 103 are rotatably coaxially disposed on both sides of the base 101. When the impeller 102 is subjected to airflow from the interception disc unit 103, it can drive the interception disc unit 103 to rotate synchronously. This invention can drive the impeller 102 to rotate by means of the airflow after the range hood fan 19 is turned on, and drive the interception disc unit 103 to rotate synchronously by the impeller 102. Moreover, as the speed of the range hood fan 19 changes, the impeller 102 can also drive the interception disc unit 103 to change its speed in a timely manner according to the change of airflow velocity. It has a good adaptive adjustment function. There is no need to set up a separate drive mechanism for the impeller 102 and the interception disc unit 103. There is also no complicated transmission mechanism between the impeller 102 and the interception disc unit 103. The structure is simple and the cost is low. There is almost no transmission loss between the impeller 102 and the interception disc unit 103, and the transmission efficiency is high and the response sensitivity is high.

[0036] The modular design of the oil mist interception module 100 of this invention allows it to be installed inside the range hood cabinet 18 using only the base 101. On the one hand, the cabinet 18 has a large space, ensuring sufficient room for the installation of a large-diameter impeller 102 and interception disc unit 103, guaranteeing that they can obtain sufficient driving force. On the other hand, by simply changing the size of the base 101, the oil mist interception module 100 can be applied to different models of range hoods, achieving a simple and low-cost modification method with good versatility.

[0037] Preferred, such as Figure 3 and Figure 4 As shown, the interception disc unit 103 includes an interception disc 1, which includes a concentric central ring 2 and an outer ring 3. One or more intermediate rings 4 are concentrically arranged between the central ring 2 and the outer ring 3. The diameters of the intermediate rings 4 are different. Radially diverging interception spokes 5 are arranged circumferentially between the central ring 2 and the adjacent intermediate ring 4, between two adjacent intermediate rings 4, and between the outer ring 3 and the adjacent intermediate ring 4. The interception spokes 5 are mainly used to intercept grease particles. During the high-speed rotation of the interception disc 1, the grease particles intercepted by the interception spokes 5 will flow along the interception spokes 5 to the outer ring 3 of the interception disc 1 under centrifugal force and be thrown onto the inner wall of the range hood cabinet 18. The interception spokes 5 are preferably distributed at equal angles to maintain the stable rotation of the interception disc 1.

[0038] Furthermore, the intercepting spokes 5 are all smooth curves protruding in the rotation direction of the intercepting disc unit 103, such as arcs. The number of intercepting spokes 5 increases ring by ring from the central ring 2 to the outer ring 3. That is, the intercepting spokes 5 between adjacent rings further away from the central ring 2 have smaller distribution angles and more numbers. This makes the ratio of interception area to ventilation area between adjacent rings closer, and the interception capacity and pressure drop between the central ring 2 and the outer ring 3 closer. A balance can be achieved between improving oil fume separation efficiency and reducing pressure drop.

[0039] Furthermore, at least two skeleton spokes 6 extending to and connected to the outer ring 3 are evenly arranged around the central ring 2. Each skeleton spoke 6 is a smooth curve, such as an arc, protruding in the rotation direction of the interception disc unit 103. The width of the skeleton spokes 6 is greater than the width of the interception spokes 5, which increases the rigidity of the oil mist interception disc 1 and reduces its swaying and deformation. In this embodiment, the four skeleton spokes 6 form a centrally symmetrical structure. The interception spokes 5 are narrower and denser, resulting in higher interception efficiency and lower weight. The width and distribution angle of the skeleton spokes 6 are much greater than those of the interception spokes 5. The combined use of the interception spokes 5 and the skeleton spokes 6 ensures both the oil fume interception capability and the rigidity of the interception disc 1. In a preferred embodiment, the interceptor spokes 5 and the skeleton spokes 6 are distributed at equal angles. The interceptor disc 1 is made of a thin plate by stamping, which is easy to process. Specifically, it can be made of cold-rolled plate with a thickness of 0.7mm or more to ensure its rigidity. The width of the skeleton spokes 6 is 14mm or more to ensure sufficient rigidity. The width of the interceptor spokes 5 is no more than 0.5mm to minimize the weight and pressure drop.

[0040] It should be noted that the width of the spokes refers to the area of ​​the spokes perpendicular to the direction of the oil fume movement, while the thickness of the spokes refers to the area of ​​the spokes parallel to the direction of the oil fume movement.

[0041] In a preferred embodiment, the intercepting disc unit 103 is provided with at least two layers of intercepting discs 1 spaced apart along its axial direction. The intercepting discs 1 are relatively fixed in both the axial and circumferential directions, and the intercepting spokes 5 of adjacent intercepting discs are staggered in the axial projection. This allows the fumes to undergo secondary interception, which improves the interception efficiency compared to a single-layer intercepting disc 1 with the same projected area. Furthermore, the axial spacing between adjacent layers of intercepting discs 1 reduces air intake resistance, and the stamping process greatly facilitates manufacturing. Specifically, the angle between the intercepting spokes 5 of adjacent layers of intercepting discs 1 is half that of the intercepting spokes 5 of a single-layer intercepting disc. For example, in this embodiment... Figures 2 to 4As shown, a double-layer interception disc consisting of a first interception disc 1-1 and a second interception disc 1-2 is used. The overall density of the interception spokes 5 is denser than that of a conventional single-layer interception disc. Through the interception of the two layers of discs, a better interception effect can be achieved. At the same time, there is a certain axial spacing between the two layers of discs, which reduces the resistance to flue gas intake. It should be noted that the skeleton spokes 6 of adjacent layers of interception discs can be staggered or not.

[0042] like Figure 2 and Figure 5 As shown, the interceptor disc unit 103 includes a mounting shaft 7 and fasteners. A spacer plate 8 perpendicular to the axial direction is provided on the outer periphery of the mounting shaft 7. The central rings 2 of two adjacent interceptor discs 1 pass through both ends of the mounting shaft 7 and are located on both sides of the spacer plate 8. The central rings 2 of adjacent interceptor discs 1 are tightly connected to the spacer plate 8 by the fasteners. By setting the spacer plate 8, the spacing between adjacent layers of interceptor discs 1 is ensured. Specifically, the fasteners can be rivets 9 (not shown in the figure, only the rivet holes are shown). The rivets 9 are sequentially passed through the interceptor disc on one side of the spacer plate 8, the spacer plate 8, and the interceptor disc on the other side of the spacer plate 8, and then the three are fastened. When the interceptor disc unit 103 rotates, the three have no relative movement and rotate at the same speed, ensuring synchronization. Figure 2 In the embodiment shown, the mounting shaft 7 and the spacer plate 8 can be an integral structure or an assembled structure.

[0043] like Figure 5 As shown, the base 101 is provided with a groove 10, and a bearing 11 is provided in the groove 10; the impeller 102 includes a guide cap 12, a connecting shaft 13 and multiple blades 14. The blades 14 are evenly arranged around the circumference of the guide cap 12. The guide cap 12 is sleeved on one end of the connecting shaft 13. The other end of the connecting shaft 13 passes through the bearing 11 and the mounting shaft 7 in sequence and is then axially fixed by a fastening nut. The mounting shaft 7 and the guide cap 12 abut against the inner ring of the bearing 11, and the outer ring of the bearing 11 abuts against the groove 10.

[0044] In this embodiment, the cross-section of blade 14 is as follows: Figure 6 The typical inclined plane of the fan blades shown illustrates that when blade 14 is subjected to an upward airflow, the force driving the airflow upward by the fan 19 can be decomposed into a horizontal component and an upward component along the blade 14. The resultant force of the horizontal components of each blade 14 forms a torque, driving the impeller 102 to rotate, and synchronously rotating the intercepting disc unit 103 via the connecting shaft 13. The upward component along the blade 14 continues to drive the airflow upward and be drawn into the fan 19. When the fan 19's rotational speed changes according to the concentration of oil fumes, the airflow velocity changes accordingly, and the rotational speed of the impeller 102 driven by the airflow also changes accordingly, realizing the adaptive adjustment of the intercepting disc unit 103's rotational speed according to the operating conditions. The number of blades 14 can be determined according to the optimal rotational effect; this embodiment uses six blades, but three, five, etc., can also be used.

[0045] like Figure 1 As shown, the base 101 is plate-shaped, and each side of the base 101 is provided with a folded edge 15. The folded edge 15 is used for detachable connection with the inner wall of the cabinet 18 of the range hood, which can be fastened with screws. The folded edge 15 can also guide the grease intercepted by the interception plate unit 103 and thrown onto the inner wall of the cabinet 18, and then drip into the smoke collection chamber 22, and finally flow into the oil cup 21. The plate surface of the base 101 is bent and extended towards the impeller 102 to form a guide ring 16 like the side of a frustum. The end of the guide ring 16 with a smaller diameter is close to the blade 14, and this end is provided with a groove 10. The groove 10 is provided with reinforcing ribs 17 that extend radially along this end at intervals. The reinforcing ribs 17 extend to the guide ring 16 and smoothly transition to the guide ring 16, which can effectively withstand the force from the bearing 11, impeller 102 and interception plate unit 103 at the groove 10. When the base plate 101 is bent, it smoothly transitions with the guide ring 16, and the reinforcing rib 17 smoothly transitions with the guide ring 16. It is preferable to adopt a smooth transition design such as an arc shape, which can reduce flow resistance and guide the oil fumes in the smoke collection chamber 22 to enter the guide ring 16 more smoothly after passing through the interception plate and enter the cabinet 18 from the guide ring 16.

[0046] It should be noted that the number of reinforcing ribs 17 should not be too large to avoid obstructing the airflow. In this embodiment, there are 6 blades 14 and 6 reinforcing ribs 17. Each blade 14 can be located in the through hole between two adjacent reinforcing ribs 17. In order to ensure that the impeller 102 obtains sufficient driving torque, in the axial projection, the total projected area of ​​the blades 14 needs to cover about half of the air outlet area of ​​the guide ring 16, so that most of the airflow passing through the guide ring 16 will exert a force on the blades 14.

[0047] The intercepting disc furthest from the blade 14 extends beyond the guide ring 16, and the diameter of this intercepting disc is larger than the diameter of the larger diameter end of the guide ring 16. This prevents oil fumes from escaping and ensures that most of the oil fumes entering the fan 19 are intercepted by the intercepting disc unit 103. It is understood that the diameter of this intercepting disc only needs to be slightly larger than the diameter of the larger diameter end of the guide ring 16; it should not be too large, thus increasing the width of the oil mist interception module 100. The intercepting disc 1 only needs to extend slightly beyond the guide ring 16; it should not be too large, causing oil fumes to escape through the gaps.

[0048] In addition, such as Figure 7 and Figure 8As shown, based on the aforementioned oil mist interception module 100, a range hood is also provided, including a cabinet 18, a fan 19, a smoke exhaust hood 20, an oil cup 21, and a smoke collection chamber 22. The smoke collection chamber 22 is provided with a smoke inlet 25, and a filter screen 23 is provided on the smoke inlet 25. A smoke exhaust port 24 is provided at the upper end of the cabinet 18. The lower end of the cabinet 18 is inserted into the smoke collection chamber 22 directly opposite the smoke inlet 25 and is detachably connected to the smoke inlet 25. The top plate of the smoke collection chamber 22 is detachably connected to the cabinet 18. The fan 19 is located inside the cabinet 18, and the smoke exhaust hood 20 is located within the cabinet 18. Above the cabinet 18, the air outlet of the fan 19 and the air inlet of the smoke hood 20 are both directly opposite the smoke outlet 24 and are detachably connected to the cabinet 18 at the smoke outlet 24. The oil cup 21 is detachably installed at the bottom of the smoke collection chamber 22. The connection between the oil cup 21 and the smoke collection chamber 22 is existing technology and will not be described in detail here. It also includes the aforementioned oil mist interception module 100. The oil mist interception module 100 is horizontally installed inside the cabinet 18 above the smoke inlet 25, and the impeller 102 of the oil mist interception module 100 is located above the interception disc unit 103.

[0049] In this embodiment, the oil mist interception module 100 in the range hood is installed as a whole between the cabinet 18 and the smoke collection chamber 22 through the folded edge 15 on the periphery of the base 101. Specifically, it can be installed at the same height at the connection between the top plate of the cabinet 18 and the smoke collection chamber 22, so that the inside of the cabinet 18 can form a relatively closed space that only takes in air through the air inlet of the guide ring 16 and exits air from the smoke outlet 24.

[0050] It is preferable to place the oil mist interception module 100 horizontally. This not only makes it more convenient for different models to use, but also allows the oil mist interception module 100 to have one side of its air outlet facing the cabinet 18 and the other side facing the smoke inlet 25 of the smoke collection chamber 22. This ensures that most of the smoke entering the fan 19 is intercepted by the oil mist interception module 100.

[0051] The working principle of the range hood provided in this embodiment is as follows: The motor of the fan 19 is started, and the operating level is selected according to the concentration of oil fumes, driving the impeller 102 to rotate. Under the suction of the fan 19, the oil fumes outside the range hood enter the smoke collection chamber 22 from the smoke inlet 25. At this time, a small portion of the grease is intercepted for the first time by the filter screen 23. Subsequently, the high-speed airflow passes through the oil mist interception module 100, generating torque on the impeller 102, driving the impeller 102 to drive the interception disc unit 103 to rotate synchronously. At this time, the oil fumes are cut and intercepted at high speed by each layer of interception discs 1. During this process, most of the grease is intercepted, preventing a large amount of grease from entering the fan 19 and contaminating the impeller 102 and volute of the fan 19, thus protecting the cleanliness and output performance of the rear fan 19. The fumes after the grease is intercepted are guided by the guide ring 16 and blocked by the cabinet 18, then drawn into the fan 19 and discharged outdoors. The intercepted grease rotates at high speed with each interception disc 1. Through centrifugal motion, it flows along the smooth curved interception spokes 5 to the outer ring 3 of the interception disc. Under the action of inertia, it is thrown out from the outer ring 3 of the interception disc to the folded edge 15 around the base 101 and the inner wall of the cabinet 18. Then, under the action of gravity, it is guided by the inner wall of the cabinet 18 and the folded edge 15 around the base 101 into the smoke collection chamber 22, and finally gathers in the oil cup 21.

[0052] The range hood of the present invention uses the aforementioned oil mist interception module 100, which has good oil mist interception performance, can protect the back-end fan 19 from performance degradation due to oil accumulation, maintain the cleanliness and performance of the fan 19, and enable the fan 19 to maintain a longer service life without increasing the power of the range hood.

[0053] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An oil mist interception module, characterized in that: The device includes a base, an impeller, and an interception disc unit. The impeller and the interception disc unit are rotatably coaxially arranged on both sides of the base, and both the impeller and the interception disc unit are fixed along their axial direction. When the impeller is subjected to airflow from the interception disc unit side, it can drive the interception disc unit to rotate synchronously. The base is also used to connect with the inner wall of the range hood cabinet to fix the oil mist interception module between the range hood fan and the smoke inlet of the smoke collection chamber. The intercepting disc unit includes an intercepting disc, which comprises a concentric central ring and an outer ring. One or more intermediate rings with different diameters are concentrically arranged between the central ring and the outer ring. Radially diverging intercepting spokes are arranged circumferentially between the central ring and adjacent intermediate rings, between two adjacent intermediate rings, and between the outer ring and adjacent intermediate rings. The intercepting disc unit has at least two layers of intercepting discs spaced apart along its axial direction. The intercepting discs are relatively fixed both axially and circumferentially, and the intercepting spokes of adjacent intercepting discs are staggered in their axial projection. The intercepting disc unit includes a mounting shaft and fasteners. A spacer plate perpendicular to the axial direction is provided on the outer periphery of the mounting shaft. The central rings of two adjacent intercepting discs pass through both ends of the mounting shaft and are located on both sides of the spacer plate. The central rings of the adjacent intercepting discs are tightly connected to the spacer plate by fasteners. The base is plate-shaped, and each side of the base is provided with a folded edge for detachable connection with the inner wall of the range hood cabinet. The plate surface of the base is bent and extended towards the impeller to form a guide ring on the side of a frustum. The impeller includes multiple blades. The intercepting disc farthest from the blades extends out of the guide ring, and the diameter of the intercepting disc is larger than the diameter of the larger diameter end of the guide ring.

2. The oil mist interception module according to claim 1, characterized in that: The intercepting spokes are all smooth curves that bulge in the direction of rotation of the intercepting disc unit, and the number of the intercepting spokes increases sequentially from the central ring to the outer ring.

3. The oil mist interception module according to claim 2, characterized in that: At least two skeleton spokes extending to and connected to the outer ring are uniformly arranged around the central ring. Each skeleton spoke is a smooth curve protruding in the rotation direction of the interceptor disc unit, and the width of the skeleton spoke is greater than the width of the interceptor spoke.

4. The oil mist interception module according to claim 1, characterized in that: The interceptor disc is made of thin sheet metal and is stamped.

5. The oil mist interception module according to claim 1, characterized in that: The base is provided with a groove, and a bearing is provided in the groove; the impeller includes a guide cap and a connecting shaft, the blades are evenly arranged around the circumference of the guide cap, the guide cap is sleeved on one end of the connecting shaft, and the other end of the connecting shaft passes through the bearing and the mounting shaft in sequence and is then axially fixed by a fastening nut, the mounting shaft and the guide cap abut against the inner ring of the bearing, and the outer ring of the bearing abuts against the groove.

6. The oil mist interception module according to claim 5, characterized in that: The smaller diameter end of the flow guide ring is close to the blade, and the groove is provided at this end. Reinforcing ribs extending radially along the periphery of the groove are provided at intervals, and the reinforcing ribs extend to the flow guide ring and smoothly transition to the flow guide ring.

7. A range hood, comprising a cabinet, a fan, a smoke hood, an oil cup, and a smoke collection chamber, wherein the smoke collection chamber is provided with a smoke inlet, the smoke inlet is provided with a filter screen, the upper end of the cabinet is provided with a smoke exhaust port, the lower end of the cabinet is inserted into the smoke collection chamber directly opposite the smoke inlet and is detachably connected to the smoke inlet, and the top plate of the smoke collection chamber is detachably connected to the cabinet; the fan is disposed within the cabinet, the smoke hood is located above the cabinet, the air outlet of the fan and the air inlet of the smoke hood are both directly opposite the smoke exhaust port and are detachably connected to the cabinet at the smoke exhaust port respectively, and the oil cup is detachably disposed at the lowest end of the smoke collection chamber, characterized in that: It also includes an oil mist interception module as described in any one of claims 1 to 6, wherein the oil mist interception module is horizontally disposed in the cabinet above the smoke inlet, and the impeller of the oil mist interception module is located above the interception disc unit.

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