Fan case and lampblack treatment device

Abstract

The utility model relates to the technical field of household appliances, in particular to a fan case and an oil smoke treatment device. The draught fan case comprises a case body, a draught fan and a flow guide assembly, the draught fan is arranged in the case body, a first air inlet and a second air inlet are formed in the draught fan, the first air inlet is located on the windward side of the draught fan, the second air inlet is located on the leeward side of the draught fan, and the flow guide assembly is arranged in the case body. The flow guide assembly is configured to guide air on the windward side of the fan to the second air inlet, the air inlet amount of the second air inlet can be effectively increased, the oil smoke suction effect of the oil smoke treatment device is effectively improved, the flow guide assembly can guide and rectify vortex in the case body, generation of the vortex in the case body is reduced, and the service life of the oil smoke treatment device is prolonged. The noise of the oil smoke treatment device in the using process is effectively reduced, and silent use of the oil smoke treatment device is achieved. The cooking fume treatment device can effectively improve the cooking fume suction effect of the range hood, and can also effectively reduce the noise of the range hood in the use process.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially, relate to a fan case and oil fume treatment device. BACKGROUND

[0002] The oil fume exhaust has become one of the kitchen household appliances in modern family, and the main function of the oil fume exhaust is to remove the oil fume during cooking, so as to maintain the good environment of the kitchen. The existing oil fume exhaust can include a fan case and a smoke collecting system, the fan is arranged in the fan case, and the smoke collecting system is located below the fan case and is communicated with the fan case. When the oil fume exhaust is used, the fan is driven to form a negative pressure area in a certain space range above the stove, so that the oil fume in the room is sucked into the oil fume exhaust, and the subsequent flue gas is discharged outside through the pipeline.

[0003] The existing fan has a first air inlet and a second air inlet to improve the oil fume suction effect of the oil fume exhaust, wherein the first air inlet is arranged on the windward side of the fan, and the second air inlet is arranged on the leeward side of the fan. The air inlet of the second air inlet is small, which affects the oil fume suction effect of the oil fume exhaust. In addition, the gas in the fan case will generate vortex during flowing to the second air inlet, which will cause large noise, resulting in large noise of the oil fume exhaust during use.

[0004] Therefore, it is urgent to design a new fan case and oil fume treatment device to improve the problem of poor oil fume suction effect and large noise of the oil fume exhaust. CONTENT OF THE UTILITY MODEL

[0005] One purpose of the utility model is to provide a fan case, which can effectively improve the oil fume suction effect of the oil fume exhaust and effectively reduce the noise of the oil fume exhaust during use.

[0006] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0007] A fan case, comprising:

[0008] A case body;

[0009] A fan is arranged in the case body, and a first air inlet and a second air inlet are formed on the fan, the first air inlet is located on the windward side T of the fan, and the second air inlet is located on the leeward side F of the fan; and

[0010] A flow guide assembly is arranged in the case body, and the flow guide assembly is configured to guide the gas on the windward side T of the fan to the second air inlet.

[0011] As an optional scheme, the first air inlet and the second air inlet are arranged along the axis direction L of the fan, and the side peripheral surface of the fan is arranged in the first air inlet and the second air inlet. C The first air inlet and the second air inlet are arranged along the axis direction L of the fan, and the side peripheral surface of the fan is arranged in the first air inlet and the second air inlet.

[0012] As an optional solution, the flow guide assembly comprises:

[0013] The first flow guide member is arranged on the side circumferential surface of the fan and comprises a first flow guide surface configured to guide the gas on the windward side T of the fan to the second air inlet.

[0014] As an optional solution, the first flow guide member comprises:

[0015] The first housing comprises the first flow guide surface, and the first noise reduction hole is formed in the first housing; and

[0016] The first noise reduction structure is arranged in the first housing.

[0017] As an optional solution, the second air inlet and the inner wall of the case body are arranged along the axis direction L C of the fan to form a second air duct C2, the second air duct C2 is in communication with the first air duct C1, the flow guide assembly comprises a second flow guide member arranged in the first air duct C1, and the second flow guide member comprises:

[0018] The recess is arranged opposite to the second air duct C2 and protrudes in a direction away from the second air duct C2; and / or

[0019] The protrusion is arranged opposite to the second air inlet, and the protrusion protrudes in a direction close to the second air inlet.

[0020] As an optional solution, the second flow guide member further comprises a flow guide portion, the flow guide portion is arranged upstream of the second air inlet, from the windward side T to the leeward side F, and the flow guide portion is arranged to be inclined in a direction close to the fan.

[0021] As an optional solution, the axis direction L C of the fan extends in the horizontal direction, the maximum opening degree H max of the fan corresponds to an area below the horizontal plane H C on which the axis direction L C extends, and the flow guide portion is arranged to be inclined in a direction close to the fan from top to bottom.

[0022] Another purpose of the utility model is to provide an oil fume treatment device which can effectively improve the oil fume suction effect of the range hood and effectively reduce the noise of the range hood during use.

[0023] To achieve this purpose, the utility model adopts the following technical solutions:

[0024] An oil fume treatment device comprises a pipeline assembly, and the oil fume treatment device further comprises the above-mentioned fan case, and the fan case is arranged on the upper portion of the pipeline assembly and is in communication with the interior of the pipeline assembly.

[0025] As an optional solution, the pipeline assembly comprises a first side wall, a second side wall and a top wall, the first side wall and the second side wall are arranged in front of and behind the top wall, the top wall is arranged on the top of the first side wall and the top of the second side wall, and the first side wall is provided with an air outlet, which is in communication with the inside of the cabinet body.

[0026] As an optional solution, the oil fume treatment device further comprises:

[0027] A flow guide mechanism is arranged at the joint position of the second side wall and the top wall, and the flow guide mechanism is configured to guide the gas in the pipeline assembly to the direction of the air outlet.

[0028] The beneficial effects of the utility model are as follows:

[0029] The fan cabinet provided by the utility model comprises a cabinet body, a fan and a flow guide assembly, the fan is arranged in the cabinet body, the fan is provided with a first air inlet and a second air inlet, the first air inlet is located at the windward side T of the fan, the second air inlet is located at the leeward side F of the fan, the flow guide assembly is arranged in the cabinet body, and the flow guide assembly is configured to guide the gas at the windward side T of the fan to the second air inlet. Through the arrangement of the flow guide assembly, the air inlet amount of the second air inlet can be effectively improved, and the oil fume treatment effect of the oil fume treatment device can be effectively improved. In addition, the flow guide assembly can guide and rectify the vortex in the cabinet body, reduce the generation of the vortex in the cabinet body, effectively reduce the noise of the oil fume treatment device in the use process, and realize the mute use of the oil fume treatment device.

[0030] The oil fume treatment device provided by the utility model can effectively improve the oil fume suction effect of the oil fume extractor and effectively reduce the noise of the oil fume extractor in the use process. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic view of the oil fume treatment device, the wall body and the ceiling provided by the utility model embodiment;

[0032] Figure 2 It is a structural schematic view of the oil fume treatment device provided by the utility model embodiment;

[0033] Figure 3 It is a structural schematic view of the fan cabinet provided by the utility model embodiment;

[0034] Figure 4 It is a first schematic view of part of the oil fume treatment device provided by the utility model embodiment;

[0035] Figure 5 It is a second schematic view of part of the oil fume treatment device provided by the utility model embodiment;

[0036] Figure 6 is a first fluid simulation schematic view of an oil fume treatment device provided by an embodiment of the present application;

[0037] Figure 7 is a third schematic view of a partial oil fume treatment device provided by an embodiment of the present application;

[0038] Figure 8 is a second fluid simulation schematic view of an oil fume treatment device provided by an embodiment of the present application;

[0039] Figure 9 is a first schematic view of a first flow guide mechanism provided by an embodiment of the present application;

[0040] Figure 10 is a second schematic view of the first flow guide mechanism provided by an embodiment of the present application;

[0041] Figure 11 is a structural schematic view of a second flow guide mechanism provided by an embodiment of the present application;

[0042] Figure 12 is a structural schematic view of a third flow guide mechanism provided by an embodiment of the present application.

[0043] In the figure:

[0044] 100, oil fume treatment device; 200, wall body; 300, suspended ceiling; 400, cooking area;

[0045] 10, smoke collection system; 11, smoke collection system main body; 111, smoke inlet; 12, flap;

[0046] 20, fan case; 21, case main body; 22, fan; 221, volute; 2211, first air inlet; 2212, second air inlet; 223, first oil screen; 224, second oil screen;

[0047] 30, pipeline assembly; 31, connecting pipe body; 311, first side wall; 3111, air outlet; 312, second side wall; 313, top wall; 32, flexible pipe body; 33, rigid pipe body;

[0048] 40, flow guide assembly; 41, first flow guide piece; 411, first shell; 4111, first flow guide surface; 41111, first noise reduction hole; 42, second flow guide piece; 421, flow guide portion; 422, recessed portion; 423, protruding portion; 424, second noise reduction hole;

[0049] 50, flow guide mechanism; 51, second shell; 511, second flow guide surface; 5111, third noise reduction hole. DETAILED DESCRIPTION

[0050] The technical solutions of the utility model are further illustrated below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the utility model, and not to limit the utility model. In addition, it should be noted that only parts related to the utility model are shown in the drawings for the convenience of description, not all.

[0051] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0052] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] In the description of the embodiments of the present disclosure, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

[0054] As shown in Figure 1 and Figure 2 The present disclosure provides an oil fume treatment device 100, which can be a top-mounted range hood, a side-suction range hood, a top-suction range hood and all types of devices with oil fume treatment function. All types of devices with oil fume treatment function are within the protection scope of the present disclosure, and the structure of the oil fume treatment device 100 is described taking the top-mounted range hood as an example.

[0055] As shown in Figure 1 and Figure 2As shown, the oil fume treatment device 100 includes a fan case 20, a smoke collecting system 10, and a pipeline assembly 30. One end of the pipeline assembly 30 is in communication with the fan case 20, and the other end of the pipeline assembly 30 is in communication with the smoke collecting system 10. Figure 1 and Figure 2 As shown, the fan case 20 includes a case body 21 and a fan 22. The fan 22 is arranged inside the case body 21, and the fan 22 can generate a negative pressure. The negative pressure can make the oil fume in the cooking area 400 pass through the smoke collecting system 10, the pipeline assembly 30, and the fan case 20 in sequence and then be discharged to the outdoor.

[0056] As shown, Figure 1 The fan case 20 is arranged above the ceiling 300 and is detachably connected to the top wall 200. The fan case 20 is arranged above the ceiling 300, which is far away from the user. The ceiling 300 can isolate the noise generated during the operation of the fan case 20, reduce the influence of the noise on the user, and improve the user experience. When the height of the wall 200 is different, the length of the pipeline assembly 30 is adjusted to ensure the working reliability of the oil fume treatment device 100. Specifically, as shown, Figure 1 and Figure 2 The pipeline assembly 30 includes a connecting pipe body 31, a flexible pipe body 32, and a rigid pipe body 33 connected in sequence. The connecting pipe body 31 is in communication with the fan case 20, and the rigid pipe body 33 is in communication with the smoke collecting system 10. The flexible pipe body 32 is a pipe body with adjustable length, so as to adjust the overall length of the pipeline assembly 30. The connecting pipe body 31 and the rigid pipe body 33 can be hard connection joints, so as to realize the stable connection of the pipeline assembly 30 with the fan case 20 and the smoke collecting system 10, respectively.

[0057] As shown, Figure 2 The smoke collecting system 10 includes a smoke collecting system body 11 and a flap 12. The smoke collecting system body 11 is provided with an inlet 111. The flap 12 is arranged on the smoke collecting system body 11 and can be switched between a first state of opening the inlet 111 and a second state of closing the inlet 111.

[0058] As shown, Figure 2 The fan 22 can be a double-inlet fan. The fan 22 has a larger air inlet, and the oil fume treatment device 100 has a better oil fume suction effect. As shown, Figure 2 and Figure 3As shown, the fan 22 includes a volute 221, an impeller (not shown in the figure), a first oil screen 223 and a second oil screen 224, wherein the volute 221 is provided with a first air inlet 2211 and a second air inlet 2212, the impeller is rotatably arranged in the volute 221, the first oil screen 223 is arranged at the first air inlet 2211, and the second oil screen 224 is arranged at the second air inlet 2212. The first oil screen 223 and the second oil screen 224 can achieve preliminary filtration of oil fume, thereby achieving a preliminary filtration effect on the oil fume.

[0059] As shown in the figure, Figures 2-3 The first air inlet 2211 is arranged at the windward side T of the fan 22, and the second air inlet 2212 is arranged at the leeward side F of the fan 22. The second air inlet 2212 has a smaller air inlet amount, which affects the oil fume suction effect of the oil fume treatment device 100. In addition, the gas in the cabinet main body 21 will generate vortex flow during flowing to the second air inlet 2212, which will cause larger noise, resulting in larger noise of the oil fume treatment device 100 during use.

[0060] In order to solve the above problems, as shown in the figure, Figures 4-5 The fan cabinet 20 further comprises a flow guide assembly 40 arranged in the cabinet main body 21. The flow guide assembly 40 is used to guide the gas at the windward side T of the fan 22 to the second air inlet 2212. Through the arrangement of the flow guide assembly 40, the air inlet amount of the second air inlet 2212 can be effectively improved, and the oil fume suction effect of the oil fume treatment device 100 can be effectively improved. In addition, the flow guide assembly 40 can guide and rectify the vortex flow in the cabinet main body 21, reduce the generation of vortex flow in the cabinet main body 21, effectively reduce the noise of the oil fume treatment device 100 during use, and realize the silent use of the oil fume treatment device 100.

[0061] As shown in the figure, Figure 5 The first air inlet 2211 and the second air inlet 2212 are arranged along the axis direction L of the fan 22, C The side peripheral surface of the fan 22 is arranged in the first air inlet 2211 and the second air inlet 2212. Through the arrangement of the first air inlet 2211 and the second air inlet 2212, the gas at the windward side T of the fan 22 can flow into the second air inlet 2212 more smoothly.

[0062] As shown in the figure, Figure 6 After the gas flowing out of the connecting pipe body 31 enters the cabinet main body 21, part of the gas enters the first air inlet 2211, and the other part of the gas is deflected to the first air inlet 2211. Due to the decrease of the flow cross-sectional area, the gas at the separation point P of the side peripheral surface of the fan 22 generates obvious separation flow, which increases the flow velocity of the gas and increases the flow loss of the gas. Therefore, vortex flow is generated in the separation area Z, which generates larger vortex noise.

[0063] To solve the above problems, such as Figure 4 As shown, the flow guiding assembly 40 includes a first flow guiding member 41, which is disposed on the side peripheral surface of the fan 22 and includes a first flow guiding surface 4111. The first flow guiding surface 4111 is used to guide the gas on the windward side T of the fan 22 to the second air inlet 2212, so that the gas forms a boundary flow effect, and the gas can flow closely along the first flow guiding surface 4111, suppressing the gas flow at the second air inlet 2212. Figure 6 The separation point P on the side circumference of the fan 22 generates significant separation flow, preventing gas flow loss, mitigating the high-speed impact of the separation zone Z, and avoiding the generation of eddies within the separation zone Z, thereby reducing the noise of the fume treatment device 100 during operation. Specifically, the first guide surface 4111 can be a streamlined airfoil surface, wherein the streamlined airfoil surface has a rounded end near the first air inlet 2211 and a pointed end near the second air inlet 2212, thereby achieving a better gas guiding effect of the first guide surface 4111.

[0064] like Figure 4 As shown, the first flow guide 41 includes a first outer shell 411 and a first noise reduction structure (not shown in the figure). The first outer shell 411 includes a first flow guide surface 4111, and a first noise reduction hole 41111 is provided on the first outer shell 411. The first noise reduction structure is disposed in the first outer shell 411. Through the arrangement of the first noise reduction hole 41111 and the first noise reduction structure, the first flow guide 41 can achieve a better noise absorption effect, thereby further reducing the noise generated by the fume treatment device 100 during use and further improving the quiet operation effect of the fume treatment device 100. Multiple first noise reduction holes 41111 can be provided, and the multiple first noise reduction holes 41111 are evenly arranged to achieve a better noise absorption effect. For example, the first noise reduction structure can be an active noise reduction structure or a passive noise reduction structure. The passive noise reduction structure can be an absorption sponge, a honeycomb sound insulation board, a soundproof cover, a soundproof mesh, a silencer, etc. All structures capable of sound absorption and noise reduction are within the protection scope of this disclosure embodiment.

[0065] like Figure 6 As shown, after the gas enters the main body 21 of the casing, due to inertia, the gas continues to impact the upper wall of the main body 21, causing the gas to be forcibly deflected and continue flowing towards the side of the second air inlet 2212. Due to the inertia of the gas, it continues to impact the side wall near the second air inlet 2212, resulting in forced deflection. Part of the gas is deflected to the second air inlet 2212 by the attraction of the second air inlet 2212, while the other part continues to flow downwards due to inertia until it merges with the incoming gas to form a backflow. The second air inlet 2212 and the inner wall of the main body 21 of the casing are aligned along the axis L of the fan 22. CThe second air duct C2 is arranged in the interval and communicates with the first air duct C1, so that the vortex is formed at the intersection of the first air duct C1 and the second air duct C2, the air inlet of the second air inlet 2212 is affected, the oil fume treatment device 100 is affected, the vortex will cause a large noise, and the oil fume treatment device 100 will produce a large noise during use.

[0066] To solve the above problems, as shown in Figure 4 、 Figure 5 and Figure 7 , the flow guide assembly 40 includes a second flow guide 42 arranged in the first air duct C1, the second flow guide 42 includes a recessed part 422, the recessed part 422 is arranged opposite to the second air duct C2 and protrudes away from the second air duct C2, the recessed part 422 can trap the gas about to form a vortex, thereby inhibiting the generation of vortex, avoiding the influence of vortex on the air inlet of the second air inlet 2212, and ensuring the better oil fume suction effect of the oil fume treatment device 100. In addition, the gas about to form a vortex will further flow into the second air inlet 2212 under the guidance of the inner side surface of the recessed part 422, ensuring the better oil fume suction effect of the oil fume treatment device 100, and realizing the silent use of the oil fume treatment device 100 during use.

[0067] In addition, as shown in Figure 4 、 Figure 5 and Figure 7 , the second flow guide 42 further includes a protruding part 423, the protruding part 423 is arranged opposite to the second air inlet 2212, the protruding part 423 is arranged to protrude towards the second air inlet 2212, the protruding part 423 is beneficial to the gas flowing along the surface thereof to the second air inlet 2212. And the protruding part 423 increases the backflow resistance of the gas about to form a vortex, thereby inhibiting the intersection of backflow and inlet gas, thereby inhibiting the generation of vortex, ensuring the better oil fume suction effect of the oil fume treatment device 100, and realizing the silent use of the oil fume treatment device 100 during use.

[0068] As shown in Figure 5 , the second flow guide 42 further includes a flow guide part 421, the flow guide part 421 is arranged upstream of the second air inlet 2212, from the windward side T to the leeward side F, the flow guide part 421 is arranged to incline towards the fan 22, the inlet gas can flow into the second air inlet 2212 along the flow guide part 421, the air inlet of the second air inlet 2212 can be effectively improved, thereby improving the oil fume suction effect of the oil fume treatment device 100.

[0069] Existing fume treatment devices place the fan vertically to ensure that the fan has a certain amount of air intake space. However, the area corresponding to the maximum opening of the volute of the existing fan is usually located at the top, resulting in poor fume extraction efficiency of the fume treatment device. The fume extraction efficiency of the fume treatment device needs to be further improved.

[0070] To solve the above problems, such as Figure 2 and Figure 3 As shown, the fan casing 20 is located on top of the piping assembly 30, and the impeller has an axial direction L... C axial direction L C Extending horizontally, the maximum opening H of the volute 221 max The corresponding region is located in the axial direction L C The horizontal plane H C Below, the maximum opening H of the volute 221 max The corresponding area is the main air intake area M of the fan 22. Through the above arrangement, the main air intake area M of the fan 22 can be closer to the air intake area of ​​the pipeline assembly 30, which can effectively reduce the flow resistance of the gas, effectively increase the air intake volume of the fan 22, and effectively improve the oil fume extraction effect of the oil fume treatment device 100.

[0071] like Figure 7 As shown, the guide section 421 is inclined from top to bottom towards the direction close to the fan 22, and the guide section 421 can better guide the intake gas towards Figure 3 The maximum opening H of the volute 221 shown max The corresponding area is diverted, which can further increase the air intake of the fan 22 and effectively improve the oil fume extraction effect of the oil fume treatment device 100.

[0072] In addition, such as Figure 4 , Figure 5 and Figure 7 As shown, the second guide member 42 is provided with a second noise reduction hole 424. By setting the second noise reduction hole 424, the second guide member 42 can achieve a better noise absorption effect, thereby further reducing the noise generated by the fume treatment device 100 during use and further improving the quiet operation effect of the fume treatment device 100.

[0073] In existing technologies, the fan casing and piping assembly are typically arranged vertically. When the fan needs maintenance, the fan casing and piping assembly must be disassembled together first, and then the fan casing must be removed from the piping assembly, making fan maintenance difficult. Furthermore, in existing technologies, the connection between the piping assembly and the fan casing is only at the cross-section of the piping assembly. The cross-sectional area of ​​the piping assembly is relatively small, resulting in a small air intake for the fan and affecting the fume extraction efficiency of the fume treatment device.

[0074] To solve the above problems, as shown in Figure 2 The pipeline assembly 30 has a first side wall 311 extending in the up-down direction, and an air outlet 3111 is formed in the first side wall 311. The fan case 20 is arranged along the front-rear direction and abuts against the first side wall 311, and the inside of the fan case 20 is in communication with the air outlet 3111. When the fan 22 fails, only the fan case 20 needs to be removed to repair the fan 22, simplifying the repair difficulty of the fan 22. In addition, since the area of the first side wall 311 is large, a large-area air outlet 3111 can be formed in the first side wall 311, allowing more air to enter the fan 22, effectively increasing the air intake of the fan 22 and improving the oil fume treatment effect of the oil fume treatment device 100.

[0075] As shown in Figure 2 and Figure 4 The pipeline assembly 30 further includes a second side wall 312 and a top wall 313. The first side wall 311 and the second side wall 312 are arranged in front-to-back intervals, and the top wall 313 is arranged at the top of the first side wall 311 and the top of the second side wall 312. An air outlet 3111 is formed in the first side wall 311. Figure 8 As shown in and

[0076] The oil fume treatment device 100 further includes a flow guide mechanism 50 arranged at the joint position of the second side wall 312 and the top wall 313. The flow guide mechanism 50 is used to guide the gas in the pipeline assembly 30 to flow towards the air outlet 3111. Through the arrangement of the flow guide mechanism 50, the vortex flow of the vortex area Q as shown in Figure 2 and Figure 4 can be inhibited, the gas flow loss of the vortex area Q is reduced, the noise generated by the vortex is effectively reduced, the oil fume treatment effect of the oil fume treatment device 100 is effectively improved, the noise generated by the oil fume treatment device 100 during use is effectively reduced, and the user experience is improved. Figure 8

[0077] As shown in Figures 9-12 The flow guide mechanism 50 includes a second housing 51, and the second housing 51 includes a second flow guide surface 511. The gas can flow more smoothly along the second flow guide surface 511 to the air outlet 3111 and further enter the fan case 20. For example, the second flow guide surface 511 can be a flat surface as shown in Figure 10 or a curved surface as shown inFigure 11 The inner concave curved surface is shown in the figure, or as Figure 12 The outer convex curved surface is shown in the figure. Among them, it can be preferred as Figure 11 The inner concave curved surface can achieve the effect of guiding the upstream gas to the air outlet 3111.

[0078] As shown in the figure Figure 9 The flow guide mechanism 50 includes a second shell 51 and a second noise reduction structure (not shown in the figure), the second shell 51 includes a second flow guide surface 511, and the second shell 51 is provided with a third noise reduction hole 5111, and the second noise reduction structure is arranged in the second shell 51. Through the arrangement of the third noise reduction hole 5111 and the second noise reduction structure, the flow guide mechanism 50 can achieve good absorption effect on noise, thereby further reducing the noise generated by the oil fume treatment device 100 during use, and further improving the silent use effect of the oil fume treatment device 100. Among them, the third noise reduction hole 5111 can be provided as a plurality of third noise reduction holes 5111, which are uniformly arranged, and can achieve good absorption effect on noise. Exemplarily, the second noise reduction structure can be an active noise reduction structure or a passive noise reduction structure, wherein the passive noise reduction structure can be an attraction sponge, a honeycomb sound insulation board, a sound absorbing cover, a sound absorbing net, a sound absorber, etc. All structures that can achieve sound absorption and noise reduction are within the protection scope of the embodiments of the present disclosure.

[0079] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A fan housing, characterized in that The oil fume treatment device comprises: a cabinet body (21); a fan (22) arranged in the cabinet body (21), wherein a first air inlet (2211) and a second air inlet (2212) are arranged on the fan (22), the first air inlet (2211) is located on the windward side T of the fan (22), and the second air inlet (2212) is located on the leeward side F of the fan (22); and a flow guide assembly (40) arranged in the cabinet body (21), wherein the flow guide assembly (40) is configured to guide the gas on the windward side T of the fan (22) to the second air inlet (2212).

2. The fan enclosure of claim 1, wherein, The first air inlet (2211) and the second air inlet (2212) are arranged along an axial direction L of the fan (22) C The side circumferential surface of the fan (22) and the inner wall of the case main body (21) are arranged to form a first air duct C1.

3. The fan enclosure of claim 2, wherein, The flow guide assembly (40) comprises: a first flow guide piece (41) arranged on the side circumferential surface of the fan (22) and comprising a first flow guide surface (4111), wherein the first flow guide surface (4111) is configured to guide the gas on the windward side T of the fan (22) to the second air inlet (2212).

4. The fan enclosure of claim 3, wherein, The first flow guide piece (41) comprises: a first shell (411) comprising the first flow guide surface (4111), wherein a first noise reduction hole (41111) is arranged on the first shell (411); and a first noise reduction structure arranged in the first shell (411).

5. The fan enclosure of claim 3, wherein, The second air inlet (2212) is arranged on the inner wall of the cabinet body (21) along the axial direction L of the fan (22) C The second air duct C2 is formed by the interval arrangement and is communicated with the first air duct C1. The flow guide assembly (40) comprises a second flow guide piece (42) arranged in the first air duct C1. The second flow guide piece (42) comprises: a recessed part (422) arranged opposite to the second air duct C2 and protruding in a direction away from the second air duct C2; and / or a protruding part (423) arranged opposite to the second air inlet (2212), wherein the protruding part (423) protrudes in a direction close to the second air inlet (2212).

6. The fan enclosure of claim 5, wherein, The second flow guide piece (42) further comprises a flow guide part (421) arranged upstream of the second air inlet (2212) and inclined in a direction close to the fan (22) from the windward side T to the leeward side F.

7. The fan enclosure of claim 6, wherein, An axis direction L of the fan (22) C A maximum opening degree H of the fan (22) extending in a horizontal direction max The corresponding area is located below the axis direction L C The horizontal plane H C The flow guide portion (421) is arranged obliquely from top to bottom toward the direction close to the fan (22).

8. An oil fume treatment device comprising a piping assembly (30), characterized in that, The oil fume treatment device further comprises the fan cabinet according to any one of claims 1-7, wherein the fan cabinet is arranged at the upper part of the pipeline assembly (30) and communicates with the inside of the pipeline assembly (30).

9. The cooking fume treatment device according to claim 8, characterized in that, The pipeline assembly (30) comprises a first side wall (311), a second side wall (312), and a top wall (313), wherein the first side wall (311) and the second side wall (312) are arranged in a spaced manner from front to back, the top wall (313) is arranged at the top of the first side wall (311) and the top of the second side wall (312), and an air outlet (3111) is arranged on the first side wall (311), wherein the air outlet (3111) communicates with the inside of the cabinet body (21).

10. The cooking fume treatment device according to claim 9, characterized in that, The oil fume treatment device further comprises: a flow guide mechanism (50) arranged at the joint position of the second side wall (312) and the top wall (313), wherein the flow guide mechanism (50) is configured to guide the gas in the pipeline assembly (30) in a direction towards the air outlet (3111).

Images