Range hood and fan box assembly thereof

Abstract

The utility model discloses a range hood and a fan box assembly thereof, the fan box assembly comprises a fan box and a smoke outlet seat, the smoke outlet seat and at least part of the fan box are used for being installed above a suspended ceiling; the fan box comprises a first side plate and a second side plate which are oppositely arranged, and a fan box outlet is formed in the upper part of the first side plate; the mounting part of the cigarette outlet seat is positioned on the inner side of the upper part of the first side plate or the mounting part of the cigarette outlet seat is positioned on the outer side of the upper part of the first side plate; a fan is arranged in the fan box, and a smoke outlet of a volute of the fan is communicated with the smoke outlet seat; the upper portion of the first side plate inclines towards the second side plate from bottom to top, and a non-zero included angle is formed between the upper portion of the first side plate and the lower portion of the first side plate. According to the application, at least the size of the mounting hole in the suspended ceiling can be ensured not to be too large, and the suitability of the fan box assembly of the split type range hood mounted above the suspended ceiling can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen home appliance technical field, especially an oil fume exhaust fan and fan case assembly thereof. BACKGROUND

[0002] The oil fume exhaust fan has become one of the indispensable kitchen home appliances in modern families. The main function of the oil fume exhaust fan is to remove oil fume during cooking, thereby maintaining a good kitchen environment.

[0003] For the common integrated oil fume exhaust fan, the following shortcomings exist: when the fan runs to drive the flue gas flow, it inevitably produces a large noise, resulting in poor user experience during cooking. In order to overcome the above problems, a split type oil fume exhaust fan is proposed in the related art, which achieves a certain noise reduction effect.

[0004] The split type oil fume exhaust fan mainly includes a smoke collecting cavity and a fan case assembly provided with a fan, which are separated from each other. Among them, the fan case assembly provided with the fan needs to be at least partially installed above the suspended ceiling.

[0005] How to make the mounting hole on the suspended ceiling as small as possible and enhance the installation adaptability of the fan case assembly in the limited space of the suspended ceiling is a technical problem to be solved for the above split type oil fume exhaust fan. SUMMARY

[0006] In view of the defects of the prior art, the utility model embodiment provides an oil fume exhaust fan and a fan case assembly thereof, which can at least ensure that the size of the mounting hole on the suspended ceiling is not too large, and can enhance the installation adaptability of the fan case assembly of the split type oil fume exhaust fan above the suspended ceiling.

[0007] The specific technical scheme of the utility model embodiment is as follows:

[0008] A fan case assembly, the fan case assembly comprising: a fan case and a smoke outlet seat, the smoke outlet seat and at least part of the fan case are used for being installed above the suspended ceiling; the fan case comprises oppositely arranged first and second side plates, the upper part of the first side plate has a fan case outlet; the mounting part of the smoke outlet seat is located on the inner side of the upper part of the first side plate or the mounting part of the smoke outlet seat is located on the outer side of the upper part of the first side plate; the fan case has a fan therein, the smoke outlet of the volute of the fan is in communication with the smoke outlet seat; the upper part of the first side plate is inclined from bottom to top to the second side plate, and the upper part of the first side plate and the lower part of the first side plate have a non-zero included angle.

[0009] In a preferred embodiment, the fan case is used for being installed on or arranged close to the top wall.

[0010] In a preferred embodiment, the height difference between the top of the fan case and the top wall is not greater than 90 mm.

[0011] In a preferred embodiment, the smoke outlet seat extends downwardly as a whole in the direction away from the fan case, or the smoke outlet seat extends horizontally as a whole in the direction away from the fan case, or the smoke outlet seat extends upwardly as a whole in the direction away from the fan case and the highest point of the smoke outlet seat is not higher than the top of the fan case, or the smoke outlet seat extends upwardly as a whole in the direction away from the fan case and the height difference between the highest point of the smoke outlet seat and the top of the fan case is not greater than the height difference between the top wall and the top of the fan case.

[0012] In a preferred embodiment, the smoke outlet seat extends horizontally as a whole in the direction away from the fan case, the smoke outlet seat has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is arranged vertically or obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in the direction away from the flue gas outlet end.

[0013] In a preferred embodiment, the smoke outlet seat extends upwardly as a whole in the direction away from the fan case, the smoke outlet seat has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is arranged vertically or obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in the direction away from the flue gas outlet end.

[0014] In a preferred embodiment, the smoke outlet seat extends downwardly as a whole in the direction away from the fan case, the smoke outlet seat has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is arranged vertically or obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in the direction away from the flue gas outlet end.

[0015] In a preferred embodiment, the plane where the mounting portion of the smoke outlet seat is located is parallel to the plane where the fan case outlet of the upper portion of the first side plate is located.

[0016] In a preferred embodiment, the angle between the plane where the upper portion of the first side plate is located and the vertical direction is less than 14.9°, or greater than 15.1° and less than or equal to 75°, or equal to 15°.

[0017] In a preferred embodiment, the proportion of the length of the upper portion of the first side plate to the total length of the first side plate is greater than or equal to a preset proportion, and the preset proportion is not less than 40% to 90%.

[0018] In a preferred embodiment, the height of the upper portion of the first side plate in the vertical direction is less than or equal to 300 mm.

[0019] In a preferred embodiment, the plane where the air outlet of the volute is located and the plane where the outlet of the fan case of the upper part of the first side plate are formed with an included angle, and the fan case further comprises a transition connecting piece, the air outlet of the volute is connected to the upper part of the first side plate and / or the mounting part of the smoke outlet seat through the transition connecting piece, so that the air outlet of the volute is connected to the smoke outlet seat through the transition connecting piece.

[0020] In a preferred embodiment, one end of the transition connecting piece is sealingly connected to the air outlet of the volute, and the other end of the transition connecting piece is sealingly connected to the upper part of the first side plate and / or the mounting part of the smoke outlet seat.

[0021] In a preferred embodiment, the transition connecting piece has a first port connected to the air outlet of the volute and a second port connected to the smoke outlet seat, the plane where the first port is located is consistent with the extension direction of the plane where the air outlet of the volute is located, and the extension direction of the plane where the second port is located is consistent with the inclination direction of the upper part of the first side plate and / or the mounting part of the smoke outlet seat.

[0022] In a preferred embodiment, the plane where the air outlet of the volute is located is parallel to the vertical direction, and the first port is parallel to the vertical direction.

[0023] In a preferred embodiment, the smoke outlet of the volute of the fan, the first side plate, and the mounting part of the smoke outlet seat are sequentially and directly or indirectly connected in the direction of the flue gas flow, or the smoke outlet of the volute of the fan, the mounting part of the smoke outlet seat, and the first side plate are sequentially and directly or indirectly connected in the direction of the flue gas flow, or the first side plate, the mounting part of the smoke outlet seat, and the smoke outlet of the volute of the fan are sequentially and directly or indirectly connected in the direction of the flue gas flow, or the first side plate, the smoke outlet of the volute of the fan, and the mounting part of the smoke outlet seat are sequentially and directly or indirectly connected in the direction of the flue gas flow, or the mounting part of the smoke outlet seat, the smoke outlet of the volute of the fan, and the first side plate are sequentially and directly or indirectly connected in the direction of the flue gas flow, or the mounting part of the smoke outlet seat, the first side plate, and the smoke outlet of the volute of the fan are sequentially and directly or indirectly connected in the direction of the flue gas flow.

[0024] In a preferred embodiment, the upper part of the second side plate is inclined from bottom to top to the first side plate, and the upper part of the second side plate and the lower part of the second side plate have a non-zero included angle.

[0025] In a preferred embodiment, the upper part of the second side plate is provided with a fan outlet hole.

[0026] In a preferred embodiment, the smoke outlet is mounted on the outer side of the upper part of the first side plate, and the upper part of the first side plate is provided with a flange at least at the lower edge of the fan case outlet, the flange being used to cover the gap between the smoke outlet and the first side plate.

[0027] In a preferred embodiment, the fan case outlet is provided with a flange at the left edge and / or the right edge and / or the upper edge.

[0028] In a preferred embodiment, the fan case assembly further comprises a smoke inlet cover, and the lower part of the fan case is connected with the smoke inlet cover, and the smoke gas can flow into the fan case through the smoke inlet cover.

[0029] In a preferred embodiment, the upper cover part of the smoke inlet cover covers part of the fan case and forms a gap with the fan case, the smoke outlet is mounted on the outer side of the upper part of the first side plate through a connecting piece, and a guide plate is arranged between the smoke outlet and the smoke inlet cover, the guide plate being used to guide the oil stains at the connecting position to the gap.

[0030] In a preferred embodiment, the guide plate is fixed on the smoke inlet cover and / or the smoke outlet.

[0031] In a preferred embodiment, the guide plate is integrally formed with the smoke inlet cover and / or the smoke outlet.

[0032] In a preferred embodiment, the upper end of the guide plate is fixed on the smoke outlet, the upper cover part of the smoke inlet cover covers the periphery of the fan case, and the lower end of the guide plate is inserted into the gap.

[0033] In a preferred embodiment, the smoke inlet cover is provided with an oil leakage structure, and the oil guided by the guide plate to the gap can flow into the smoke inlet cover through the oil leakage structure.

[0034] In a preferred embodiment, the front side plate of the fan case is asymmetrically provided with a plurality of first mounting holes, the rear side plate of the fan case is asymmetrically provided with a plurality of second mounting holes, the plurality of first mounting holes coincide with the positions of the plurality of second mounting holes after being rotated by 180° around the vertical center line, and the first mounting holes and the second mounting holes are used to connect the smoke inlet cover; and / or the left side plate of the fan case is asymmetrically provided with a plurality of third mounting holes, the right side plate of the fan case is asymmetrically provided with a plurality of fourth mounting holes, the plurality of third mounting holes coincide with the plurality of fourth mounting holes after being rotated by 180° around the vertical center line, and the third mounting holes and the fourth mounting holes are used to connect the smoke inlet cover.

[0035] In a preferred embodiment, the smoke outlet seat has a smoke inlet end and a smoke outlet end, the smoke inlet end is arranged obliquely to the vertical direction, and the smoke outlet end is arranged vertically or obliquely to the vertical direction.

[0036] In a preferred embodiment, when the smoke outlet seat is in the installed state, the smoke inlet end is oblique from top to bottom to the smoke outlet end.

[0037] In a preferred embodiment, when the smoke outlet seat is in the installed state, the plane where the smoke inlet end is located intersects the plane where the smoke outlet end is located.

[0038] In a preferred embodiment, the inner surface of the fan box is further provided with a noise reduction structure, the noise reduction structure is arranged opposite to the air inlet of the volute of the fan, and the noise reduction structure comprises a noise reduction layer and a fixing mechanism for fixing the noise reduction layer on the inner surface of the fan box.

[0039] In a preferred embodiment, the surface of the fixing mechanism has a non-microporous hollow structure.

[0040] An extractor hood, comprising the fan box assembly according to any one of the preceding embodiments.

[0041] In a preferred embodiment, the extractor hood further comprises a smoke pipe and a smoke collecting cavity, and the fan box assembly, the smoke pipe and the smoke collecting cavity are arranged close to the vertical wall surface and sequentially connected from top to bottom.

[0042] In a preferred embodiment, the center line of the impeller of the fan of the fan box assembly is perpendicular to the vertical wall surface, or the included angle between the center line of the impeller of the fan of the fan box assembly and the vertical wall surface is greater than or equal to 45° and less than 90°.

[0043] In a preferred embodiment, the plane where the upper part of the first side plate of the fan box of the fan box assembly is located has a preset included angle with the top wall, and the preset included angle is not 90°.

[0044] In a preferred embodiment, the fan box outlet of the upper part of the first side plate of the fan box of the fan box assembly faces the top wall.

[0045] In a preferred embodiment, the center line of the fan box outlet of the upper part of the first side plate of the fan box of the fan box assembly has a preset non-zero included angle with the top wall.

[0046] In a preferred embodiment, the fan box has a fan box inlet for guiding smoke, and the center line of the fan box inlet is perpendicular to the axis of the impeller of the fan.

[0047] In a preferred embodiment, the fan case has a first dimension along the left-right direction of 100 mm to 450 mm, and a second dimension along the front-rear direction of 100 mm to 450 mm.

[0048] The technical scheme of the utility model has the following remarkable beneficial effects:

[0049] The upper portion of the first side plate provided with the fan case outlet is inclined from bottom to top towards the opposite second side plate, that is, the upper portion of the first side plate has a non-zero included angle with the lower portion of the first side plate. Since the upper portion of the first side plate serves as the mounting base of the smoke outlet seat, when the upper portion of the first side plate is inclined from top to bottom towards the opposite second side plate, the smoke outlet seat mounted on the upper portion of the first side plate is inclined towards the second side plate, the projection size of the smoke outlet seat towards the ceiling is reduced, and the installation size of the fan case assembly in the horizontal direction is reduced, thereby reducing the size of the mounting hole in the ceiling.

[0050] When the smoke outlet seat on the upper portion of the first side plate is inclined towards the second side plate, the smoke outlet seat mounted on the upper portion of the first side plate is inclined towards the second side plate, the size of the smoke outlet seat in the height direction is reduced, the installation adaptability of the smoke outlet seat above the ceiling is enhanced, and the smoke outlet seat can be installed in a ceiling with a smaller height.

[0051] With reference to the following description and drawings, specific embodiments of the utility model are disclosed in detail, and the principle of the utility model can be adopted. It should be understood that the embodiments of the utility model are not limited in scope. Within the scope and clauses of the appended claims, the embodiments of the utility model include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replaced by features in other embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0052] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the utility model disclosure in any way. In addition, the shapes and scale sizes of the components in the drawings are only illustrative and are used to help understand the utility model, and are not specific limitations on the shapes and scale sizes of the components of the utility model. Those skilled in the art can choose various possible shapes and scale sizes to implement the utility model according to specific circumstances under the guidance of the utility model.

[0053] Figure 1A structural schematic view of a fan box assembly provided in an embodiment of the present application;

[0054] Figure 2 A structural schematic view of a fan box assembly provided in an embodiment of the present application;

[0055] Figure 3 A front view of cooperation between a fan box and a smoke inlet cover in a fan box assembly provided in an embodiment of the present application;

[0056] Figure 4 A side view of cooperation between a fan box and a smoke inlet cover in a fan box assembly provided in an embodiment of the present application;

[0057] Figure 5 A sectional view of cooperation between a fan box and a smoke inlet cover in a fan box assembly provided in an embodiment of the present application;

[0058] Figure 6 A side view of cooperation between a fan box, a smoke inlet cover and a smoke outlet seat in a fan box assembly provided in an embodiment of the present application;

[0059] Figure 7 A sectional view of cooperation between a fan box, a smoke inlet cover and a smoke outlet seat in a fan box assembly provided in an embodiment of the present application;

[0060] Figure 8 A structural schematic view of a fan box in a fan box assembly provided in an embodiment of the present application;

[0061] Figure 9 A structural schematic view of a smoke inlet cover in a fan box assembly provided in an embodiment of the present application;

[0062] Figure 10 A structural schematic view of another fan box assembly provided in an embodiment of the present application;

[0063] Figure 11 A structural schematic view of a transition connecting piece in a fan box assembly provided in an embodiment of the present application; Figure 10

[0064] A structural schematic view of a transition connecting piece in a fan box assembly provided in an embodiment of the present application; Figure 12

[0065] A front view of a transition connecting piece in a fan box assembly provided in an embodiment of the present application; Figure 13

[0066] A three-dimensional schematic view of cooperation between a fan box and a smoke inlet cover in a fan box assembly provided in an embodiment of the present application; Figure 14

[0067] A three-dimensional schematic view of cooperation between a fan box, a smoke inlet cover and a smoke outlet seat in a fan box assembly provided in an embodiment of the present application; Figure 15 Figure 14 ​Front view of the fan case assembly of the stroke machine;

[0068] Figure 16 For Figure 14 Right view of the fan case assembly of the stroke machine;

[0069] Figure 17 For Figure 14 Left view of the fan case assembly of the stroke machine;

[0070] Figure 18 For Figure 14 Rear view of the fan case assembly of the stroke machine;

[0071] Figure 19 For Figure 14 Top view of the fan case assembly of the stroke machine;

[0072] Figure 20 For Figure 14 Bottom view of the fan case assembly of the stroke machine;

[0073] Figure 21 For the three-dimensional view of the cooperation between the fan case and the volute in the fan case assembly provided in the embodiments of the present application;

[0074] Figure 22 For Figure 21 Front view of the fan case assembly of the stroke machine;

[0075] Figure 23 For Figure 21 Right view of the fan case assembly of the stroke machine;

[0076] Figure 24 For Figure 21 Left view of the fan case assembly of the stroke machine;

[0077] Figure 25 For Figure 21 Rear view of the fan case assembly of the stroke machine;

[0078] Figure 26 For Figure 21 Top view of the fan case assembly of the stroke machine;

[0079] Figure 27 For Figure 21 Bottom view of the fan case assembly of the stroke machine;

[0080] Figure 28 For the structural schematic view of the range hood provided in the embodiments of the present application.

[0081] Reference signs of the present application:

[0082] 1, fan case;

[0083] 102, fan case outlet;

[0084] 103, fan case inlet;

[0085] 11. volute;

[0086] 134. first side plate;

[0087] 1341. flange;

[0088] 133. second side plate;

[0089] 1331. wire pressing seat;

[0090] 131. third side plate;

[0091] 132. fourth side plate;

[0092] 135. top plate;

[0093] 15. oil guide plate;

[0094] 601. third mounting hole;

[0095] 602. fourth mounting hole;

[0096] 65. fixing mechanism;

[0097] 2. smoke inlet cover;

[0098] 26. groove;

[0099] 27. oil leakage structure;

[0100] 3. smoke pipe;

[0101] 4. smoke collecting cavity;

[0102] 5. smoke outlet seat;

[0103] 50. mounting portion;

[0104] 501. smoke gas inlet end;

[0105] 502. smoke gas outlet end;

[0106] 6. ceiling;

[0107] 60. mounting hole;

[0108] 7. top wall;

[0109] 8. transition connecting piece;

[0110] 81. first port;

[0111] 82. second port;

[0112] X, left-right direction;

[0113] Y, front-rear direction;

[0114] Z, height direction. DETAILED DESCRIPTION

[0115] The technical solutions of the utility model will be described in detail below in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and not for limiting the scope of the utility model, and after reading the utility model, various equivalent modifications of the utility model made by those skilled in the art all fall within the scope defined by the claims of the application.

[0116] It should be noted that when an element is referred to as "being disposed on" another element, it can be directly on the other element or there can be a middle element present. When an element is referred to as "being connected to" another element, it can be directly connected to the other element or there can be a middle element present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0117] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0118] In order to realize the installation of the fan box assembly, an opening hole for installing the fan box assembly needs to be formed on the ceiling. In theory, the opening hole needs to meet the miniaturization requirement and the aesthetic requirement as much as possible under the condition of assembly. In addition, due to the limited installation space on the ceiling, the structure of the fan box assembly needs to be reasonably arranged, so that the size of the opening hole can be miniaturized and aesthetic as much as possible, and the adaptability of the fan box assembly of the split type range hood to the installation above the ceiling can be enhanced.

[0119] The utility model embodiment provides a range hood and fan box assembly thereof, which can ensure that the size of the mounting hole on the ceiling is not too large, and can enhance the adaptability of the fan box assembly of the split type range hood to the installation above the ceiling.

[0120] Please refer to Figures 1 to 28In the embodiments of the present application, a fan box assembly can include a fan box 1 and a smoke outlet 5, the smoke outlet 5 and at least part of the fan box 1 are arranged above a ceiling 6; the fan box 1 includes a first side plate 134 and a second side plate 133 arranged oppositely, the upper part of the first side plate 134 has a fan box outlet 102; the mounting part 50 of the smoke outlet 5 is located on the inner side of the upper part of the first side plate 134 or the mounting part 50 of the smoke outlet 5 is located on the outer side of the upper part of the first side plate 134; the fan box 1 has a fan therein, the air outlet of the volute 11 of the fan is communicated with the smoke outlet 5; the upper part of the first side plate 134 is inclined from bottom to top to the second side plate 133, and the upper part of the first side plate 134 has a non-zero angle with the lower part of the first side plate 134.

[0121] As shown in Figure 1 , Figure 2 in the embodiments, the fan box assembly can mainly include a fan box 1 and a smoke outlet 5. The fan box 1 and the smoke outlet 5 can be assembled before leaving the factory, or can be assembled after leaving the factory.

[0122] Please refer to Figure 14 , the range hood to which the fan box assembly is applied can be a split type range hood. The smoke outlet 5 and at least part of the fan box 1 are arranged above the ceiling 6. For the range hood, the fan in the fan box 1 is the main source of noise, and the smoke outlet 5 is arranged opposite to the air outlet of the volute 11 of the fan. When the smoke outlet 5 and at least part of the fan box 1 provided with the fan are arranged above the ceiling 6, the fan is arranged away from the user side, which is conducive to reducing the influence of the noise generated by the fan during operation on the user. In addition, when the fan is arranged away from the user, the distance from the fan to the cooking stove position where oil fume is generated is relatively far, so that the oil fume adsorbed on the impeller and the volute 11 of the fan can be effectively reduced, that is, the oil is not easy to accumulate on the fan, so as to ensure the reliability of the fan during operation and prolong the service life of the fan.

[0123] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 14 , for the smoke outlet 5, it is arranged at the fan box outlet 102, and is used for transition connection between the fan box outlet 102 and the smoke exhaust pipe. For the installation environment provided with the ceiling 6, the smoke outlet 5 is arranged above the ceiling 6, which can be conveniently connected with the smoke exhaust pipe above the ceiling 6.

[0124] As shown in Figure 8As shown, the fan box 1 can include a first side plate 134 and a second side plate 133 arranged oppositely. For example, the first side plate 134 and the second side plate 133 can be opposite right side plate and left side plate. Of course, the first side plate 134 and the second side plate 133 can also be opposite front side plate and rear side plate. In the embodiments and drawings of the present application, the first side plate 134 and the second side plate 133 are taken as an example of opposite right side plate and left side plate. When the fan box 1 includes the first side plate 134 located on the right side and the second side plate 133 located on the left side, it can also include a third side plate 131 and a fourth side plate 132 arranged oppositely and connecting the first side plate 134 and the second side plate 133 in the circumferential direction. The third side plate 131 can be a front side plate, and the fourth side plate 132 can be a rear side plate. The first side plate 134, the third side plate 131, the second side plate 133 and the fourth side plate 132 are sequentially connected to form the circumferential side wall of the fan box 1.

[0125] The upper part of the first side plate 134 can be provided with a fan box outlet 102. The air outlet of the volute 11 of the fan is connected in communication with the smoke outlet 5. When the fan is started, the smoke generated during cooking can flow through the smoke outlet 5 under the suction of the fan and then be discharged outward through the smoke exhaust pipe.

[0126] When the upper part of the first side plate 134 is provided with the fan box outlet 102, since the smoke outlet 5 is arranged corresponding to the fan box outlet 102, the smoke outlet 5 can also be arranged on the upper part of the first side plate 134. Specifically, the smoke outlet 5 has a mounting portion for cooperating with the first side plate 134. The mounting portion can be located on the inner side or the outer side of the upper part of the first side plate 134.

[0127] The specific form of the mounting portion can be a flange ring with an outer contour matched with the structure of the fan box outlet 102. When the fan box outlet 102 is a rectangular hole, the structure of the flange ring can be rectangular; when the fan box outlet 102 is a circular hole, the structure of the flange ring can be circular. When the fan box outlet 102 is of other structures, the structure of the flange ring can be adapted synchronously. Specifically, the present application does not limit the specific structure of the mounting portion here.

[0128] In order to realize the fixed connection between the smoke outlet 5 and the fan box 1, the circumferential direction of the flange ring can be provided with a plurality of fastening holes at intervals. The relative fixation between the smoke outlet 5 and the fan box 1 can be realized by arranging fasteners in the fastening holes.

[0129] In this embodiment, the upper part of the first side plate 134, which is provided with the fan box outlet 102, is inclined from bottom to top toward the second side plate 133. That is, the upper part of the first side plate 134 and the lower part of the first side plate 134 have a non-zero angle. With this arrangement, since the upper part of the first side plate 134 serves as the mounting base for the smoke outlet seat 5, when the upper part of the first side plate 134 is inclined from top to bottom toward the opposite second side plate 133, it is beneficial to move the smoke outlet seat 5 installed on the upper part of the first side plate 134 toward the second side plate 133, relative to the vertical extension or the inversion in the opposite direction away from the second side plate 133. This reduces the projected size of the smoke outlet seat 5 toward the ceiling 6. In the horizontal direction, it is beneficial to reduce the installation size required for the fan box assembly, and thus to reduce the size of the mounting hole 60 on the ceiling 6, so that the mounting hole 60 on the ceiling 6 is not too large.

[0130] In addition, for users with cabinets, when the size of the mounting holes 60 on the ceiling 6 is controlled within a small range, they can be easily hidden in the user's cabinet, thus ensuring that the fan box assembly of the range hood meets the aesthetic requirements as much as possible during installation.

[0131] When the smoke outlet seat 5 on the upper part of the first side plate 134 moves closer to the second side plate 133, it facilitates the movement of the smoke outlet seat 5 installed on the upper part of the first side plate 134 towards the second side plate 133. This reduces the size of the smoke outlet seat 5 in the height direction Z, enhancing its adaptability to installation above the ceiling 6. This allows the smoke outlet seat 5 to be installed in ceilings with lower heights. Even when the ceiling 6 is low, the smoke outlet seat 5 can be installed within the limited space above the ceiling 6 without easily protruding downwards. This design enhances the adaptability of the smoke outlet seat 5 and also increases the success rate of installing a split-type range hood.

[0132] like Figure 14 As shown, in a specific application scenario, for a split range hood where the fan housing assembly, flue 3, and smoke collection chamber 4 are located near the vertical wall and connected sequentially from top to bottom, the opening size on the ceiling 6 is generally slightly larger than the cross-sectional size of the fan housing 1 itself. The fan housing 1 in this fan housing assembly can be partially located above the ceiling 6 and partially located below the ceiling 6. The portion of the fan housing 1 exposed above the ceiling 6 can be installed in the user's cabinet or covered by a decorative cover; this is not the main factor restricting the installation of the split range hood. For the aforementioned range hood, the main factor restricting its installation within the limited opening size of the ceiling 6 is the smoke outlet seat 5 on the first side plate 134 of the fan housing 1. During the installation of the fan housing assembly into the ceiling 6, the smoke outlet seat 5 on the first side plate 134 of the fan housing 1 directly increases the installation size of the fan housing assembly.

[0133] In the embodiment, by tilting the upper part of the first side plate 134 used to set the smoke outlet seat 5 to the opposite side, the projection size of the smoke outlet seat 5 towards the ceiling 6 is reduced, which is beneficial to reduce the installation size of the fan box assembly in the horizontal direction, and further beneficial to reduce the opening size on the ceiling 6, so as to ensure that the fan box assembly can be smoothly installed into the ceiling 6 through the limited installation hole size.

[0134] In addition, when the smoke outlet seat 5 is tilted with the first side plate 134 on which it is installed, the size of the smoke outlet seat 5 in the height direction is reduced, and the smoke outlet seat 5 can be installed in a ceiling 6 with smaller height, thereby enhancing the installation adaptability of the smoke outlet seat 5 above the ceiling 6.

[0135] Please refer to Figure 14 In an embodiment, the fan box 1 is installed on or arranged close to the top wall 7.

[0136] In the embodiment, the fan box 1 is specifically installed on the top wall 7, i.e. the top of the fan box 1 is fixed on the top wall 7, or the fan box 1 is arranged close to the top wall 7, i.e. the top of the fan box 1 is within a small distance range from the top wall 7. When the fan box 1 is directly installed on the top wall 7 or arranged close to the top wall 7, it is beneficial to make full use of the height space between the ceiling 6 and the top wall 7, so that the noise source is as far as possible from the human ear, and low noise is achieved; at the same time, the height requirement for the ceiling 6 can be reduced, i.e. even in the case that the height of the ceiling 6 is low, the range hood in the embodiment can also be installed in a split type, and the smoke outlet seat 5 can also be located above the ceiling 6.

[0137] As Figure 14 shown, specifically, the height difference between the top of the fan box 1 and the top wall 7 is not greater than 90 mm.

[0138] For a general kitchen environment provided with a ceiling 6, the height of the ceiling 6 (i.e. the distance from the ceiling 6 to the top wall 7) is usually about 250 mm. The smoke outlet seat 5 of the fan box 1 and the smoke exhaust pipe connected with the smoke outlet seat 5 are usually located on the ceiling 6. Among them, for the smoke exhaust pipe, its diameter is usually between 160 mm and 180 mm.

[0139] In the embodiment, the height difference between the top of the fan box 1 and the top wall 7 can be controlled within 90 mm, so that in the case of a ceiling 6 with a height of 250 mm, the largest existing specification of the smoke exhaust pipe can be installed in the ceiling 6.

[0140] It should be noted that the height difference between the top of the fan box 1 and the top wall 7 is mainly determined based on the height of the ceiling 6, the diameter of the largest exhaust pipe, the structure of the fan box assembly, and other factors. The above-mentioned data defined in the embodiments of the present application can be adapted to the height of the commonly used ceiling 6 and the size of the exhaust pipe.

[0141] For the fan box 1, when it is installed on or near the top wall 7, the installation state of the smoke outlet seat 5 mounted on the fan box 1 can include various, specifically, the smoke outlet seat 5 extends downwardly as a whole in the direction away from the fan box 1, or the smoke outlet seat 5 extends horizontally as a whole in the direction away from the fan box 1, or the smoke outlet seat 5 extends upwardly as a whole in the direction away from the fan box 1 and the highest point of the smoke outlet seat 5 is not higher than the top of the fan box 1, or the smoke outlet seat 5 extends upwardly as a whole in the direction away from the fan box 1 and the height difference between the highest point of the smoke outlet seat 5 and the top of the fan box 1 is not greater than the height difference between the top wall 7 and the top of the fan box 1.

[0142] Overall, for the fan box 1 installed with the smoke outlet seat 5, when it is installed on or near the top wall 7, at least the noise source can be arranged away from the human ear, so that the separate range hood can have better noise reduction effect.

[0143] Specifically, for the smoke outlet seat 5, when it is arranged in different installation states, it has different technical effects.

[0144] When the smoke outlet seat 5 extends horizontally or downwardly as a whole in the direction away from the fan box 1, the anti-interference performance of the range hood during installation can be improved, for example, when there is a beam or other structure on the top wall, the downward arrangement of the smoke outlet seat 5 can make the exhaust pipe connected thereto avoid the beam. Or, for example, it is possible that the opening position of the user's public flue is low, and when the smoke outlet seat 5 is arranged downwardly, the exhaust pipe connected to the smoke outlet seat 5 can be accurately installed and connected. In addition, for the fan, the smoke flowing out of the fan at the air outlet of the volute 11 is affected by the structure of the volute 11 itself and the inertial force, and overall has a downwardly inclined flow trend. When the smoke outlet seat 5 extends downwardly as a whole, the smoke flowing out of the fan can be discharged through the smoke outlet seat 5 with lower resistance, larger air volume and smaller noise.

[0145] When the smoke outlet seat 5 extends horizontally as a whole in the direction away from the fan box 1, the smoke flowing out of the fan can be discharged through the smoke outlet seat 5 with lower resistance, larger air volume and smaller noise. In addition, when the smoke outlet seat 5 extends along the horizontal direction as a whole, the height of the installation space required when it is matched with the exhaust pipe is the lowest.

[0146] When the smoke outlet seat 5 extends upwardly as a whole in the direction away from the fan box 1, the space of the ceiling 6 can be further utilized, the noise generated by the airflow flow can be away from the human ear, and the noise reduction performance of the range hood can be improved. In addition, it is also possible to consider that the position of the public flue is high, and when the smoke outlet seat 5 extends upwardly, the smoke exhaust pipe connected to the smoke outlet seat 5 can be conveniently connected to the opening of the public flue.

[0147] For the case that the smoke outlet seat 5 extends upwardly as a whole, in order to prevent the highest position of the smoke outlet seat 5 from interfering with the top wall 7, the highest point of the smoke outlet seat 5 can be not higher than the top of the fan box 1, or the height difference between the highest point of the smoke outlet seat 5 and the top of the fan box 1 is not greater than the height difference between the top wall 7 and the top of the fan box 1, so that the smoke outlet seat 5 of the fan box assembly does not interfere with the top wall 7 above the ceiling 6 after being installed above the ceiling 6.

[0148] As shown in Figure 1 or Figure 7 In one embodiment, the smoke outlet seat 5 extends horizontally as a whole in the direction away from the fan box 1, the smoke outlet seat 5 has a smoke inlet end 501 and a smoke outlet end 502, the smoke outlet end 502 is vertically arranged or inclined, and the smoke inlet end 501 is inclined from bottom to top in the direction away from the smoke outlet end 502.

[0149] In the present embodiment, the smoke outlet seat 5 can extend along the horizontal direction as a whole. Specifically, the smoke outlet seat 5 can include a tubular body having a center line extending along the horizontal direction. The smoke outlet seat 5 further includes a smoke inlet end 501 for connecting the fan box 1 and a smoke outlet end 502 for connecting the smoke exhaust pipe. The specific structure of the smoke outlet end 502 can be matched with the structure of the docking end of the smoke exhaust pipe assembled therewith. For example, the smoke outlet end 502 of the smoke outlet seat 5 can be arranged vertically as a whole or inclined.

[0150] The specific structure of the smoke inlet end 501 of the smoke outlet seat 5 can be matched with the structure of the side plate of the fan box 1 assembled therewith. For example, when the upper part of the first side plate 134 of the fan box 1 for arranging the smoke outlet seat 5 is inclined from bottom to top to the second side plate 133, that is, the upper part of the first side plate 134 has a non-zero included angle with the lower part of the first side plate 134, the smoke inlet end 501 of the smoke outlet seat 5 is also inclined, and the plane where the smoke inlet end 501 is arranged is parallel to the first side plate 134.

[0151] As shown in Figure 1As shown, the top tangent of the air outlet of the volute 11 of the fan extends horizontally. When the smoke outlet seat 5 extends horizontally as a whole, and the smoke inlet of the smoke outlet seat 5 is parallel to the first side plate 134 of the fan box 1, the smoke flowing out of the fan can flow into the exhaust pipe through the smoke outlet seat 5 with low resistance, large air volume, and low noise, and then be discharged outward. In addition, when the smoke outlet seat 5 extends horizontally as a whole, the installation space required when it is matched with the exhaust pipe is minimized.

[0152] In one embodiment, the smoke outlet seat 5 extends upward in a direction away from the fan box 1. The smoke outlet seat 5 has a flue gas inlet end 501 and a flue gas outlet end 502. The flue gas outlet end 502 is generally vertically or inclined. The flue gas inlet end 501 is inclined from bottom to top in a direction away from the flue gas outlet end 502.

[0153] In this embodiment, the main difference from the above embodiment is that the smoke outlet seat 5 extends upwards as a whole. Installation problems may arise for the smoke outlet seat 5 and the exhaust pipe. For example, if the exhaust pipe opening in the public flue is too high, the exhaust pipe leading from the smoke outlet seat 5 cannot easily connect with the exhaust pipe opening. In this case, the smoke outlet seat 5 may need to extend upwards as a whole to overcome the aforementioned installation and connection problems.

[0154] As for the smoke outlet seat 5, when it extends upward as a whole, it can further utilize the space of the ceiling 6, keeping the noise generated by the airflow away from people's ears and improving the noise reduction performance of the range hood.

[0155] like Figure 10 As shown, in one embodiment, the smoke outlet seat 5 extends downward in a direction away from the fan box 1. The smoke outlet seat 5 has a flue gas inlet end 501 and a flue gas outlet end 502. The flue gas outlet end 502 is generally arranged vertically or inclined. The flue gas inlet end 501 is inclined from bottom to top in a direction away from the flue gas outlet end 502.

[0156] In this embodiment, the main difference from the above embodiment is that the smoke outlet seat 5 extends downwards as a whole. For the smoke outlet seat 5 and the exhaust pipe, some interference problems may be encountered during installation (e.g., a beam is installed on the top wall 7), or the opening position of the common flue for the exhaust pipe may be too low. In such cases, the smoke outlet seat 5 may need to extend downwards as a whole to overcome the aforementioned interference problems and / or installation connection problems.

[0157] Overall, for the fan, the flue gas flowing out of the outlet of the volute 11 is affected by the structure of the volute 11 itself and the inertial force, and overall shows an inclined downward flow trend. When the smoke outlet seat 5 extends downward as a whole, it is most beneficial for the flue gas flowing out of the fan to flow into the smoke exhaust pipe through the smoke outlet seat 5 with low resistance, large air volume, and small noise, thereby being discharged outward.

[0158] As shown in Figure 1 or Figure 7 In one embodiment, the plane where the mounting portion 50 of the smoke outlet seat 5 is located is parallel to the plane where the fan box outlet 102 of the upper part of the first side plate 134 is located.

[0159] Specifically, the smoke outlet seat 5 has a mounting portion for cooperating with the first side plate 134, which can be located on the inner side or the outer side of the upper part of the first side plate 134. The specific form of the mounting portion can be referred to the specific description of the above-mentioned embodiments, which will not be repeated here. The plane where the mounting portion is located can be arranged in parallel with the plane where the fan box outlet 102 is located, thereby ensuring that the smoke outlet seat 5 can be compactly docked with the fan box 1, and facilitating the undisturbed flow of flue gas at the docking position of the two.

[0160] In addition, when the top of the outlet of the volute 11 of the fan is arranged close to the top plate 135 of the fan box 1, the inclination direction of the first side plate 134 is consistent with the inclination direction of the plane where the outlet of the volute 11 is located. Such arrangement is beneficial for arranging the outlet opening formed on the first side plate 134 to be located at the uppermost position of the fan box 1, thereby facilitating the reduction of the height dimension required for the fan box 1 to occupy between the ceiling 6 and the top wall 7, and improving the universality of the installation of the range hood.

[0161] As shown in Figure 5 In one embodiment, the angle Q between the plane where the upper part of the first side plate 134 is located and the vertical direction is less than 14.9° or greater than 15.1° and less than or equal to 75° or equal to 15°.

[0162] In the present embodiment, the upper part of the first side plate 134 is arranged obliquely, and specifically, the angle Q between the plane where the upper part of the first side plate 134 is located and the vertical direction can be within 14.9°; or the angle Q between the plane where the upper part of the first side plate 134 is located and the vertical direction can be between 15.1° and 75°; or the angle Q between the plane where the upper part of the first side plate 134 is located and the vertical direction can be equal to 15°.

[0163] When setting the inclination angle of the upper part of the first side plate 134, various factors such as the performance of the fan and the adaptability of the installation need to be considered comprehensively.

[0164] Specifically, before the fan box assembly is installed into the ceiling 6, the smoke outlet seat 5 needs to be installed on the first side plate 134 of the fan box 1 first, and then the whole is installed into the ceiling 6 through the opening of the ceiling 6.

[0165] In theory, the greater the inclination angle of the upper portion of the first side plate 134, the smaller the projection size of the smoke outlet seat 5 towards the ceiling under the condition of a certain opening in the ceiling 6, which is more conducive to reducing the installation size of the fan box assembly in the horizontal direction, that is, more conducive to the upper portion of the fan box 1 passing through the opening in the ceiling 6 and being installed on the ceiling 6. At this time, the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction can be greater than 15.1° and less than or equal to 75°.

[0166] Generally, for an extractor hood, the exhaust pipe needs to extend in the horizontal direction at least at the end to be connected to the opening of the public flue. For the extractor hood, the smoke gas at the air outlet of the fan volute 11 is subjected to the action of the inertial force and flows obliquely downward.

[0167] The greater the inclination angle of the upper portion of the first side plate 134, the greater the angle between the inertial force of the smoke gas at the air outlet of the fan volute 11 and the horizontal direction, and the greater the pressure loss generated when the smoke gas changes from the air outlet to the horizontal direction and is discharged to the exhaust pipe.

[0168] In order to reduce the pressure loss of the smoke gas discharged from the air outlet of the fan volute 11 as much as possible, the inclination angle of the upper portion of the first side plate 134 can be appropriately reduced. For example, the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction can be within 14.9° or equal to 15°.

[0169] In addition, when the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction is within 14.9° or equal to 15°, the size of the smoke outlet seat 5 in the height direction after the smoke outlet seat 5 is installed on the first side plate 134 will be reduced relative to the axial length of the smoke outlet seat 5, so that the installation height of the fan box 1 can be controlled within a reasonable range, and the smoke outlet seat 5 can improve the installation adaptability above the ceiling 6 by virtue of its small size in the height direction.

[0170] In other embodiments, a transition piece can be further provided between the air outlet of the fan volute 11 and the upper portion of the first side plate 134 for connection and transition. Overall, the inclination angle of the first side plate 134 can be adapted to the working conditions required for installation in combination with the performance of the fan and the installation adaptability.

[0171] In addition, considering that the exhaust duct needs to be connected to the side wall, the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction is generally not too large, for example, can be within 75°, so that the upper portion of the fan box 1, the smoke outlet seat 5 and the exhaust duct can be arranged in the limited space between the ceiling 6 and the top wall 7 in a compact and reasonable structure.

[0172] Preferably, the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction can be within 45°. If the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction is large, for example, greater than 45°, and the axis direction of the smoke outlet seat 5 is perpendicular to the first side plate 134, the opening of the smoke outlet seat 5 as a whole is more inclined to the top wall 7. Generally, for the user's public flue, the opening thereof is usually arranged on the side wall, and a large angle is formed between the smoke outlet seat 5 and the user's public flue, which is not convenient for the smoke outlet seat 5 to be connected to the public flue through the exhaust duct. In addition, when the angle Q between the plane where the upper portion of the first side plate 134 is located and the vertical direction is too large, the size of the smoke outlet seat 5 in the height direction will be large, so that when the distance between the top of the fan box 1 and the top wall 7 is very close, interference between the smoke outlet seat 5 and the top wall 7 can occur due to the arrangement of the smoke outlet seat 5. In an embodiment, the length of the upper portion of the first side plate 134 accounts for more than or equal to a preset proportion of the total length of the first side plate 134, and the preset proportion is not less than 40% to 90%.

[0173] In the embodiment, the first side plate 134 can include an upper portion arranged in an inclined manner and a lower portion extending vertically. The upper portion of the first side plate 134 is mainly used for opening the air outlet, mounting the smoke outlet seat 5, and can be used for directly connecting the air outlet of the fan volute 11. The first side plate 134 cooperates with other side plates to mount the main body portion of the fan volute 11.

[0174] For the upper portion of the first side plate 134, as the basis for arranging the smoke outlet seat 5, the length of the upper portion of the first side plate 134 can be matched with the diameter of the smoke outlet seat 5. For example, when the diameter of the smoke outlet seat 5 is 160 mm, the length of the upper portion of the first side plate 134 can be slightly larger than 160 mm; for example, when the diameter of the smoke outlet seat 5 is 180 mm, the length of the upper portion of the first side plate 134 can be slightly larger than 180 mm.

[0175] Please refer to Figure 6 For the embodiment in which the lower portion of the fan box 1 needs to be mounted in the smoke inlet hood 2, the lower portion of the first side plate 134 has at least a mounting height for coinciding with the smoke inlet hood 2, so as to arrange the connecting structure. For example, the mounting height is at least 10 mm.

[0176] The maximum value of the preset ratio of the length of the upper portion of the first side plate 134 to the total length of the first side edge can be the ratio of the diameter of the smoke outlet 5 to the height of the fan housing 11. The maximum value of the preset ratio can be more than 90%.

[0177] For the implementation of the fan housing 11 at least partially protruding from the fan box 1, if the height of the fan housing 11 is 380 mm, the minimum value of the preset ratio of the length of the upper portion of the first side plate 134 to the total length of the first side edge can be the ratio of the diameter of the smoke outlet 5 to the height of the fan housing 11. The minimum value of the preset ratio can be more than 40%.

[0178] Overall, considering that when the lower portion of the first side plate 134 of the fan box 1 is small, it is not conducive to ensuring the strength of the fan box 1. In order to ensure that the fan box 1 has sufficient strength, the preset ratio should not be too large, for example, within 1 / 2.

[0179] In one embodiment, the height of the upper portion of the first side plate 134 in the vertical direction is less than or equal to 300 mm.

[0180] In the present embodiment, the upper portion of the first side plate 134 is used as the mounting base of the smoke outlet 5, in order to arrange the smoke outlet 5 and the smoke exhaust pipe connected to the smoke outlet 5 above the ceiling 6, the height of the upper portion of the first side plate 134 in the vertical direction can be controlled according to the height of the ceiling 6. Specifically, the height of the upper portion of the first side plate 134 in the vertical direction is within the height of the ceiling 6, for example, when the height of the ceiling 6 is 250 mm, the height of the upper portion of the first side plate 134 in the vertical direction is within 250 mm. For example, when the height of the ceiling 6 is 300 mm, the height of the upper portion of the first side plate 134 in the vertical direction is within 300 mm. Generally, the height of the existing ceiling 6 does not exceed 300 mm.

[0181] When the height of the upper portion of the first side plate 134 in the vertical direction is controlled within 300 mm, it can be ensured that the smoke outlet 5 does not protrude downward from the ceiling 6. Basically, the existing smoke outlet 5 is installed in any way, and when matched with the first side plate 134, it can be located above the ceiling 6.

[0182] In addition, when the first side plate 134 is arranged in an inclined manner, a right-angled space is formed corresponding to the portion arranged in an inclined manner. In the present application, the smoke outlet 5 is mounted by utilizing the right-angled space, and the height of the upper portion of the first side plate 134 is reasonably controlled based on the size of the smoke outlet 5, which is also conducive to controlling the size of the mounting hole 60 required when the fan box 1 is arranged in the ceiling 6, that is, it can be ensured that the size of the mounting hole 60 is as small as possible, and the overall structure is reasonably compact.

[0183] Please refer to Figure 10 to 11 In one embodiment, the plane where the air outlet of the volute 11 is located and the plane where the fan case outlet 102 of the upper part of the first side plate 134 are located form an angle, and the fan case 1 further comprises a transition connecting piece 8, the air outlet of the volute 11 is connected to the upper part of the first side plate 134 and / or the mounting part 50 of the smoke outlet seat 5 through the transition connecting piece 8, so that the air outlet of the volute 11 is communicated with the smoke outlet seat 5 through the transition connecting piece 8.

[0184] An angle can be formed between the plane where the air outlet of the volute 11 is located and the upper part of the first side plate 134. In order to transitionally connect the air outlet of the volute 11 and the upper part of the first side plate 134 provided with the fan case outlet 102, the fan case 1 can further be provided with a transition connecting piece 8. The transition connecting piece 8 can be a pipe section connecting the air outlet of the volute 11 and the fan case outlet 102 of the upper part of the first side plate 134. The air outlet of the volute 11 can be connected to at least one of the upper part of the first side plate 134 and the mounting part 50 of the smoke outlet seat 5 through the transition connecting piece 8, so as to guide the flue gas to the smoke outlet seat 5 through the transition connecting piece 8.

[0185] The one end of the transition connecting piece 8 is sealingly connected to the air outlet of the volute 11, and the other end of the transition connecting piece 8 is sealingly connected to the upper part of the first side plate 134 and / or the mounting part 50 of the smoke outlet seat 5.

[0186] In order to ensure that the oil fume does not escape from the connection position of the transition connecting piece 8 and the air outlet of the volute 11, the transition connecting piece 8 can be sealingly connected to the air outlet of the volute 11. The specific form of the sealing connection can be flange connection, or can be the form of buckle connection plus a sealing element, or can be the form of threaded fastening plus a sealing element, or can be other forms, which are not limited to the above description. Those skilled in the art can make other changes under the inspiration of the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, which should be covered within the protection scope of the present application.

[0187] Similarly, in order to ensure that the oil fume does not escape from the connection position of the other end of the transition connecting piece 8 and the upper part of the first side plate 134 and / or the mounting part 50 of the smoke outlet seat 5, the other end of the transition connecting piece 8 can be sealingly connected to the upper part of the first side plate 134 and / or the mounting part 50 of the smoke outlet seat 5. The specific form of the sealing connection can be referred to the above description, which will not be described here again.

[0188] Please refer to Figure 11 , Figure 12 and Figure 13As shown, in one embodiment, the transition connector 8 has a first port 81 which is in communication with the air outlet of the volute 11 and a second port 82 which is in communication with the smoke outlet seat 5, the plane in which the first port 81 is located is consistent with the extending direction of the plane in which the air outlet of the volute 11 is located, and the extending direction of the plane in which the second port 82 is located is consistent with the inclination direction of the upper portion of the first side plate 134 and / or the mounting portion 50 of the smoke outlet seat 5.

[0189] In the present embodiment, the transition connector 8 can be a pipe segment which is open at both ends. The transition connector 8 has a first port 81 which is located upstream along the direction of the flow of flue gas and a second port 82 which is located downstream. The first port 81 is used to be in communication with the air outlet of the volute 11 so as to receive the flue gas which flows out of the air outlet of the volute 11. The second port 82 is used to be in communication with the smoke outlet seat 5 so as to guide the flue gas to the smoke outlet seat 5.

[0190] In order to ensure that the first port 81 of the transition connector 8 and the air outlet of the volute 11 can be seamlessly connected in the most suitable manner, the plane in which the first port 81 is located is consistent with the extending direction of the plane in which the air outlet of the volute 11 is located. In this way, not only is it beneficial for the air outlet of the volute 11 and the first port 81 of the transition connector 8 to be reliably and sealingly connected, but it also ensures that the flue gas which flows out of the air outlet of the volute 11 can enter the transition connector 8 with a lower pressure loss.

[0191] In order to ensure that the second port 82 of the transition connector 8 and the upper portion of the first side plate 134 and / or the mounting portion 50 of the smoke outlet seat 5 can be seamlessly connected in the most suitable manner, the extending direction of the plane in which the second port 82 is located is consistent with the inclination direction of the upper portion of the first side plate 134 and / or the mounting portion 50 of the smoke outlet seat 5. In this way, not only is it beneficial for the second port 82 of the transition connector 8 and the upper portion of the first side plate 134 and / or the mounting portion 50 of the smoke outlet seat 5 to be reliably and sealingly connected, but it also ensures that the flue gas which flows out of the second port 82 of the transition connector 8 can enter the smoke outlet seat 5 with a lower pressure loss.

[0192] In one specific embodiment, the plane in which the air outlet of the volute 11 is located is parallel to the vertical direction, and the first port 81 is parallel to the vertical direction.

[0193] In the present embodiment, the plane where the air outlet of the volute 11 is located can be parallel to the vertical plane, and the upper part of the first side plate 134 where the fan box outlet 102 is arranged is arranged in an inclined manner, and the two cannot be directly connected in space, and the transition connector 8 is needed to transition and connect. The first port 81 of the transition connector 8 is used to connect to the air outlet of the volute 11, and the first port 81 can also be parallel to the vertical direction, so that the air outlet of the volute 11 and the first port 81 can be seamlessly connected in the most suitable manner.

[0194] In one embodiment, the air outlet of the volute 11 of the fan, the first side plate 134, and the mounting portion 50 of the smoke outlet seat 5 are sequentially connected in the smoke flow direction, directly or indirectly, or the air outlet of the volute 11 of the fan, the mounting portion 50 of the smoke outlet seat 5, and the first side plate 134 are sequentially connected in the smoke flow direction, directly or indirectly, or the first side plate 134, the mounting portion 50 of the smoke outlet seat 5, and the air outlet of the volute 11 of the fan are sequentially connected in the smoke flow direction, directly or indirectly, or the first side plate 134, the air outlet of the volute 11 of the fan, and the mounting portion 50 of the smoke outlet seat 5 are sequentially connected in the smoke flow direction, directly or indirectly, or the mounting portion 50 of the smoke outlet seat 5, the air outlet of the volute 11 of the fan, and the first side plate 134 are sequentially connected in the smoke flow direction, directly or indirectly, or the mounting portion 50 of the smoke outlet seat 5, the first side plate 134, and the air outlet of the volute 11 of the fan are sequentially connected in the smoke flow direction, directly or indirectly.

[0195] In the present embodiment, the upstream and downstream relationship of the air outlet of the volute 11 of the fan, the first side plate 134, and the mounting portion 50 of the smoke outlet seat 5 in the smoke flow direction is not uniquely limited by the present application, and can form various cases through permutation and combination: for example, in the smoke flow direction, the air outlet of the volute 11 of the fan, the first side plate 134, and the mounting portion 50 of the smoke outlet seat 5 can be sequentially arranged; or, in the smoke flow direction, the air outlet of the volute 11 of the fan, the mounting portion 50 of the smoke outlet seat 5, and the first side plate 134 can be sequentially arranged, or, in the smoke flow direction, the first side plate 134, the mounting portion 50 of the smoke outlet seat 5, and the air outlet of the volute 11 of the fan can be sequentially arranged; or, in the smoke flow direction, the first side plate 134, the air outlet of the volute 11 of the fan, and the mounting portion 50 of the smoke outlet seat 5 can be sequentially arranged; or, in the smoke flow direction, the mounting portion 50 of the smoke outlet seat 5, the air outlet of the volute 11 of the fan, and the first side plate 134 can be sequentially arranged; or, the mounting portion 50 of the smoke outlet seat 5, the first side plate 134, and the air outlet of the volute 11 of the fan can be sequentially arranged.

[0196] The fan's volute 11 outlet, the first side plate 134 and the mounting portion 50 of the smoke outlet seat 5 are directly connected or indirectly connected through an intermediate connector. In this embodiment, the upper portion of the second side plate 133 is inclined from bottom to top towards the first side plate 134, and the upper portion of the second side plate 133 has a non-zero angle with the lower portion of the second side plate 133.

[0197] As shown in Figure 1 or Figure 5 In one embodiment, the upper portion of the second side plate 133 is inclined from bottom to top towards the first side plate 134, and the upper portion of the second side plate 133 has a non-zero angle with the lower portion of the second side plate 133.

[0198] In this embodiment, the upper portion of the second side plate 133 opposite to the first side plate 134 is inclined from bottom to top towards the first side plate 134, and the upper portion of the second side plate 133 has a non-zero angle with the lower portion of the second side plate 133. The advantages of the inclined upper portion of the second side plate 133 can be referred to the advantages of the inclined upper portion of the first side plate 134.

[0199] For example, due to the inclination of the upper portion of the second side plate 133 towards the first side plate 134 and the inclination of the upper portion of the first side plate 134 towards the second side plate 133, the combination of the two can further make the cross section of the fan box 1 corresponding to the upper portion smaller than the cross section of the lower portion. In this way, in the horizontal direction, it is beneficial to reduce the installation size required by the fan box assembly, and further beneficial to reduce the installation hole 60 on the ceiling 6, so that the installation hole 60 on the ceiling 6 tends to be miniaturized. In addition, during the process of installing the fan box assembly into the installation hole 60 of the ceiling 6, the inclined structure of the first side plate 134 and the second side plate 133 can be used for guidance, which facilitates the quick and convenient installation of the fan box assembly into the ceiling 6.

[0200] Further, the upper portion of the second side plate 133 is provided with a fan outlet hole.

[0201] In this embodiment, the upper portion of the second side plate 133 is also provided with a fan outlet hole. Since the upper portion of the second side plate 133 is inclined from top to bottom towards the first side plate 134, there is a surplus installation space formed at the position corresponding to the upper portion of the second side plate 133. When the fan outlet hole is installed on the upper portion of the second side plate 133, the installation space can be fully utilized. The corresponding wire pressing seat 1331 and other structures are arranged at the position of the fan outlet hole, which is similar to the arrangement of the smoke outlet seat 5 on the first side plate 134, and does not negatively interfere with the installation of the fan box 1.

[0202] Please refer to Figure 7 and Figure 8In some embodiments, the smoke outlet 5 is mounted on the outer side of the upper portion of the first side plate 134, and the upper portion of the first side plate 134 is provided with a flange 1341 at least at the lower edge of the fan box outlet 102, which is used to cover the gap between the smoke outlet 5 and the first side plate 134.

[0203] In the present embodiment, the first side plate 134 of the fan box 1 and the smoke outlet 5 have a certain fitting gap at the connected position. In order to prevent oil from seeping outwards through the fitting gap between the first side plate 134 of the fan box 1 and the smoke outlet 5, the first side plate 134 of the fan box 1 is provided with a flange 1341 at least at the lower edge of the fan box outlet 102, which covers the fitting gap between the smoke outlet 5 and the first side plate 134 of the fan box 1, thereby guiding the oil away from the fitting gap between the smoke outlet 5 and the first side plate 134 of the fan box 1, and preventing the oil from seeping out of the fitting gap.

[0204] In the present embodiment, the first side plate 134 of the fan box 1 and the smoke outlet 5 have a certain fitting gap at the connected position. In order to prevent oil from seeping outwards through the fitting gap between the first side plate 134 of the fan box 1 and the smoke outlet 5, the first side plate 134 of the fan box 1 is provided with a flange 1341 at least at the lower edge of the fan box outlet 102, which covers the fitting gap between the smoke outlet 5 and the first side plate 134 of the fan box 1, thereby guiding the oil away from the fitting gap between the smoke outlet 5 and the first side plate 134 of the fan box 1, and preventing the oil from seeping out of the fitting gap.

[0205] It should be noted that in the present embodiment, a sealing member can also be provided between the first side plate 134 of the fan box 1 and the smoke outlet 5 to reduce the risk of oil seepage. However, the sealing member is usually a consumable part, and after being used for a period of time, it may not be able to seal tightly, and still cannot completely solve the oil seepage problem between the first side plate 134 and the smoke outlet 5. In addition, if a metal hard contact seal is used, the fitting gap can only be reduced, but the fitting gap cannot be completely eliminated, and thus the oil seepage problem between the first side plate 134 and the smoke outlet 5 cannot be fundamentally solved.

[0206] In the present embodiment, by providing a flange 1341 at least at the lower edge of the outlet position of the first side plate 134, the fitting gap between the smoke outlet 5 and the first side plate 134 is covered by the flange 1341, and the oil seepage problem between the first side plate 134 and the smoke outlet 5 is cleverly and completely solved.

[0207] As shown in Figure 8 The left edge and / or the right edge and / or the upper edge of the fan box outlet 102 is provided with a flange 1341.

[0208] In the present embodiment, in addition to the flange 1341 being provided at the lower edge of the fan case outlet 102, at least one of the other edges of the fan case outlet 102 can also be provided with a flange 1341. Specifically, the edges of the fan case outlet 102 can be provided with a full circle of flanges 1341 in the circumferential direction to reliably ensure that oil liquid cannot seep out from the gap between the two fittings, and the manufacturing process is also relatively simple, only the first side plate 134 at the fan case outlet 102 needs to be integrally flanged 1341.

[0209] In one embodiment, the fan case assembly further comprises a smoke inlet cover 2, the lower part of the fan case 1 is connected with the smoke inlet cover 2, flue gas can flow into the fan case 1 through the smoke inlet cover 2, the upper cover part of the smoke inlet cover 2 covers part of the fan case 1.

[0210] In the present embodiment, the box body of the fan case 1 can have a fan case 1 inlet for introducing flue gas and a fan case outlet 102 for discharging flue gas outward.

[0211] The smoke inlet cover 2 is provided at the inlet of the fan case 1, and the smoke inlet cover 2 is sealingly connected with the fan case 1, flue gas can flow into the fan case 1 through the smoke inlet cover 2. Specifically, the relative position relationship between the smoke inlet cover 2 and the fan case 1 can be that the upper part of the smoke inlet cover 2 can cover the outside of the fan case 1. When the upper part of the smoke inlet cover 2 covers part of the fan case 1, the height of the side plate of the fan case 1 can be appropriately reduced at this time, especially when the smoke inlet cover 2 is made of low-cost materials such as plastic, and the fan case 1 is made of relatively high-cost metal, which is conducive to reducing the cost of the range hood.

[0212] In the embodiments and drawings of the present application, the embodiment in which the upper part of the smoke inlet cover 2 covers the outside of the fan case 1 is mainly introduced in detail, and other embodiments can be adaptively adjusted according to the typical embodiment, which will not be described one by one here.

[0213] In one embodiment, the upper part of the smoke inlet cover 2 covers part of the fan case 1 and forms a gap with the fan case 1, the smoke outlet seat 5 is installed on the outside of the upper part of the first side plate 134 through a connecting piece, and an oil guide plate 15 is provided between the smoke outlet seat 5 and the smoke inlet cover 2, the oil guide plate 15 is used to guide the oil dirt at the connection to the gap.

[0214] In the present embodiment, the upper part of the smoke inlet cover 2 covers the outside of the fan case 1, and the upper part of the smoke inlet cover 2 covers part of the fan case 1 and forms a gap with the fan case 1.

[0215] The smoke outlet seat 5 can be connected to the outlet periphery of the first side plate 134 through a connecting member. Specifically, the connecting member can be a fastener, such as a threaded fastener, for example a bolt, which fastens the smoke outlet seat 5 to the side plate.

[0216] The smoke outlet seat 5 and the first side plate 134 also have a certain risk of oil leakage at the position where the connecting member is arranged. Oil can leak outward through the connecting member and the mating position of the first side plate 134 and the smoke outlet seat 5. In order to guide the oil that can leak at the connecting member into the gap between the fan box 1 and the smoke inlet cover 2, an oil guide plate 15 can be arranged between the smoke outlet seat 5 and the smoke inlet cover 2. The oil at the connecting position can be guided to the gap by the oil guide plate 15. Specifically, the lower part of the oil guide plate 15 is located at least partially in the lower part of the smoke outlet seat 5, thereby receiving the oil that leaks downward at the connecting member.

[0217] In one embodiment, the oil guide plate 15 is fixed to the smoke inlet cover 2 and / or the smoke outlet seat 5.

[0218] In the present embodiment, the lower part of the oil guide plate 15 can be fixed to the smoke inlet cover 2, or the upper part of the oil guide plate 15 can be fixed to the smoke outlet seat 5, or the upper part of the oil guide plate 15 can be fixed to the smoke outlet seat 5 and the lower part of the oil guide plate 15 can be fixed to the smoke inlet cover 2. The manner in which the oil guide plate 15 is fixed to the smoke inlet cover 2 and / or the smoke outlet seat 5 can be through fasteners, through a snap-fit mechanism, or through other means, which are not limited in the present application.

[0219] Alternatively, in another embodiment, the oil guide plate 15 is integrally formed with the smoke inlet cover 2 and / or the smoke outlet seat 5.

[0220] In the present embodiment, the oil guide plate 15 can be integrally formed with the smoke inlet cover 2, or the oil guide plate 15 can be integrally formed with the smoke outlet seat 5, or the oil guide plate 15 can be integrally formed with the smoke inlet cover 2 and the smoke outlet seat 5. When the oil guide plate 15 is integrally formed with the smoke inlet cover 2 and / or the smoke outlet seat 5, not only can the assembly process be simplified, but the sealing performance of the oil guide plate 15 itself at the mating position with the smoke inlet cover 2 and / or the smoke outlet seat 5 can also be ensured.

[0221] In a specific embodiment, the upper end of the oil guide plate 15 is fixed to the smoke outlet seat 5, the upper part of the smoke inlet cover 2 is arranged around the fan box 1, and the lower end of the oil guide plate 15 is inserted into the gap.

[0222] In the embodiment, the oil guide plate 15 can be in the form of a cover plate arranged in an inclined manner as a whole, and can include a main guide plate opposite the first side plate 134, and first and second side guide plates located on both sides of the main guide plate and connected with the first side plate 134. The cross-sectional size of the first and second side guide plates can gradually decrease at the middle and lower portions, so as to facilitate insertion of the lower end of the oil guide plate 15 into the gap between the smoke inlet cover 2 and the fan box 1.

[0223] The manner in which the upper end of the oil guide plate 15 is fixed to the smoke outlet seat 5 can be, for example, by fasteners. For example, a plurality of fasteners can be arranged at intervals at the upper end of the oil guide plate 15, and the oil guide plate 15 can be fixed to the smoke outlet seat 5 by the fasteners. Of course, the manner in which the upper end of the oil guide plate 15 is fixed to the smoke outlet seat 5 is not limited to the above example. Those skilled in the art can also make other changes under the inspiration of the technical essence of the present application, as long as the functions and effects achieved are the same or similar to those of the present application, and they should be covered within the protection scope of the present application.

[0224] As shown in FIG. 1, Figure 9 In one embodiment, the smoke inlet cover 2 is provided with an oil leakage structure 27, and the oil guided by the oil guide plate 15 to the gap can flow into the smoke inlet cover 2 through the oil leakage structure 27.

[0225] In the embodiment, a groove 26 can be arranged on the inner side of the smoke inlet cover 2 by integral molding or fixed mounting. The groove 26 can be used to directly or indirectly limit the lower portion of the fan box 1, and can also be used to cooperate with a sealing structure.

[0226] Further, the groove 26 has an oil leakage structure 27, which is used to guide the oil in the gap between the groove 26 and the fan box 1 into the interior of the smoke inlet cover 2.

[0227] In the embodiment, the groove 26 has opposite groove bottoms, an inner groove wall on the inner side of the groove bottoms, and an outer groove wall on the outer side of the groove bottoms, which is the cover wall of the smoke inlet cover 2. The oil leakage structure 27 can be formed on the inner groove wall, and can be at least one groove or opening formed on the inner groove wall.

[0228] When a gap is formed between the inner groove wall of the smoke inlet cover 2 and the fan box 1, the oil on the inner wall of the fan box 1 flows to the sealing structure and then flows into the gap between the inner groove wall of the groove 26 and the fan box 1. Since the inner groove wall has a certain height, the oil will accumulate in the gap. The accumulated oil will not only affect the sealing performance of the sealing structure, but also easily leak out when disassembled, and further increase the difficulty of cleaning the structure.

[0229] In this embodiment, by setting an oil leakage structure 27 on the inner wall of the groove 26, the oil can be efficiently and quickly discharged downwards, thereby preventing the oil from accumulating in the gap between the groove 26 and the fan box 1. This allows the sealed structure to be immersed in oil for a long time without oil leakage during disassembly. In addition, it does not increase the difficulty of cleaning this structure.

[0230] like Figure 8 As shown, in one embodiment, the front side plate of the fan box 1 is asymmetrically provided with a plurality of first mounting holes, and the rear side plate of the fan box 1 is asymmetrically provided with a plurality of second mounting holes. The plurality of first mounting holes are rotated 180° around the vertical center line and coincide with the position of the plurality of second mounting holes. The first mounting holes and the second mounting holes are used to connect the smoke inlet hood 2; and / or the left side plate of the fan box 1 is asymmetrically provided with a plurality of third mounting holes 601, and the right side plate of the fan box 1 is asymmetrically provided with a plurality of fourth mounting holes 602. The plurality of third mounting holes 601 are rotated 180° around the vertical center line and coincide with the plurality of fourth mounting holes 602. The third mounting holes 601 and the fourth mounting holes 602 are used to connect the smoke inlet hood 2.

[0231] In this embodiment, the fan box 1 has opposing front and rear side panels, as well as opposing left and right side panels. The front side panel can be the aforementioned third side panel 131, the rear side panel can be the aforementioned fourth side panel 132, the left side panel can be the aforementioned second side panel 133, and the right side panel can be the aforementioned first side panel 134.

[0232] Taking the left and right side panels of the fan box 1 as examples, if the left side panel of the fan box 1 is rotated 180° around the vertical center line of the fan box, the third mounting hole 601 on the left side panel can coincide with the fourth mounting hole 602 on the right side panel. With this configuration, when the smoke hood 2 is connected to the fan box 1, the left and right walls of the smoke hood 2 and the left and right side panels of the fan box 1 can be interchanged. During installation, the installer does not need to deliberately match the left and right side panels of the fan box 1 with the left and right walls of the smoke hood 2 one-to-one. The left side panel of the fan box 1 can correspond to the left wall of the smoke hood 2 or the right wall of the smoke hood 2. This configuration can reduce the requirements and difficulty of assembling the fan box 1 and the smoke hood 2, improve assembly efficiency, and achieve error prevention by using the above-mentioned asymmetrical opening. In addition, the asymmetrical opening itself has a simple process and relatively low requirements for the opening spacing.

[0233] like Figure 1As shown, in one embodiment, the smoke outlet seat 5 has a smoke inlet end 501 and a smoke outlet end 502. The smoke inlet end 501 is inclined relative to the vertical direction, and the smoke outlet end 502 is vertical or inclined relative to the vertical direction.

[0234] In this embodiment, the smoke outlet seat 5 can extend horizontally as a whole. Specifically, the smoke outlet seat 5 may include a tubular body with a centerline, which can extend horizontally or extend obliquely upward or downward at a certain angle to the horizontal. The smoke outlet seat 5 also includes a flue gas inlet end 501 and a flue gas outlet end 502, the flue gas inlet end 501 for connecting to the fan box 1, and the flue gas outlet end 502 for connecting to the exhaust pipe.

[0235] The specific structure of the flue gas inlet end 501 of the smoke outlet seat 5 can be adapted to the structure of the side plate of the fan box 1 to which it is assembled. For example, when the upper part of the first side plate 134 of the fan box 1 used to set the smoke outlet seat 5 is inclined from bottom to top toward the second side plate 133, that is, when the upper part of the first side plate 134 and the lower part of the first side plate 134 have a non-zero angle, the flue gas inlet end 501 of the smoke outlet seat 5 is inclined relative to the vertical direction. The plane on which the flue gas inlet end 501 is located can be parallel to the first side plate 134.

[0236] The specific structure of the flue gas outlet end 502 can be adapted to the structure of the connecting end of the flue gas pipe it is assembled with. For example, the flue gas outlet end 502 of the flue gas seat 5 can be set vertically or inclined.

[0237] In one embodiment, when the smoke outlet seat 5 is in the installation state, the smoke inlet end 501 is inclined from top to bottom toward the smoke outlet end 502.

[0238] In this embodiment, the specific structure of the flue gas inlet end 501 of the smoke outlet seat 5 can be adapted to the structure of the side plate of the fan box 1 to which it is assembled. After the smoke outlet seat 5 is installed in place with the first side plate 134 of the fan box 1, the flue gas inlet end 501 can be tilted from top to bottom toward the flue gas outlet end 502.

[0239] The outlet end of the smoke outlet seat 5 can be vertically arranged. When the smoke outlet seat 5 is in the installation state, the plane where the flue gas inlet end 501 is located intersects the plane where the flue gas outlet end 502 is located. Alternatively, the flue gas outlet end 502 of the smoke outlet seat 5 can also be inclined. The direction of the inclination of the flue gas outlet end 502 of the smoke outlet seat 5 is different from the direction of the inclination of the flue gas inlet end 501 of the smoke outlet seat 5. When the smoke outlet seat 5 is in the installation state, the plane where the flue gas inlet end 501 is located intersects the plane where the flue gas outlet end 502 is located.

[0240] Specifically, the smoke outlet 5 can be a pipe segment with a circular cross-section at one end. The planes at both ends of the pipe segment (smoke inlet end 501 and smoke outlet end 502) are not parallel, so that the plane at the smoke inlet end 501 intersects the plane at the smoke outlet end 502. When the smoke outlet 5 has the above structure, it can be flexibly adapted to the first side plate 134 of the fan box 1 and the smoke exhaust pipe, thereby discharging the smoke outward along a predetermined arrangement path.

[0241] like Figure 8 As shown, in one embodiment, a noise reduction structure is further provided on the inner surface of the fan housing 1. The noise reduction structure is disposed opposite to the air inlet of the fan volute 11. The noise reduction structure includes: a noise reduction layer and a fixing mechanism 65 for fixing the noise reduction layer on the inner surface of the fan housing 1.

[0242] In this embodiment, in order to improve the noise reduction effect of the fan housing 1, a noise reduction structure is provided on the inner surface of the fan housing 1. The noise reduction structure is located between the fan and the fan housing 1, that is, on the path of noise propagation, and is used to isolate and / or absorb the noise generated when the fan is working.

[0243] Specifically, the noise reduction structure may include a noise reduction layer and a fixing mechanism 65 for fixing the noise reduction layer. The fixing mechanism 65 can cooperate with the inner surface of the fan housing 1, thereby reliably installing the noise reduction layer on the inner surface of the fan housing 1. The noise reduction layer may specifically include any one or a combination of the following: a sound-absorbing material layer, a sound-insulating material layer, and a damping material layer, etc.

[0244] To maximize the noise reduction effect of the noise reduction layer, the surface of the fixing mechanism 65 has a non-microporous perforated structure. Compared to a microporous fixing structure, this perforated structure allows the noise generated by the fan to fully contact the noise reduction layer, resulting in a more ideal noise reduction effect. The perforated structure can be in the form of a cross, a triangular frame, or any other shape or structure. Any structure that ensures stable fixing of the noise reduction structure and allows for sufficient contact between the fan noise and the noise reduction layer can be used.

[0245] The fixing mechanism 65 can be integrally set on the inner surface of the fan box 1 or fixed to the inner surface of the fan box 1 by installation. Alternatively, in some special cases, such as when the noise reduction structure itself is adhesive, the fixing mechanism 65 can be omitted.

[0246] Please refer to the following: Figure 14The oil smoke machine in the embodiment of the present application also comprises the fan case assembly. The oil smoke machine can achieve the technical effects achieved by the fan case assembly. For details, please refer to the specific description of the above embodiment.

[0247] In one embodiment, the oil smoke machine can further comprise a smoke pipe 3 and a smoke collecting cavity 4. The fan case assembly, the smoke pipe 3 and the smoke collecting cavity 4 are arranged close to the vertical wall and are sequentially connected from top to bottom.

[0248] In the embodiment, the oil smoke machine can comprise the fan case assembly, the smoke pipe 3 and the smoke collecting cavity 4. In the flow direction of the oil smoke, the smoke collecting cavity 4, the smoke pipe 3 and the fan case assembly can be sequentially arranged. Specifically, the smoke inlet cover 2, the smoke pipe 3 and the fan case assembly can be sequentially arranged vertically close to the wall from bottom to top. The smoke inlet cover 2 is arranged relatively close to the cooking area of the user and is used to collect the oil smoke generated during cooking. The fan case assembly comprises the fan case 1 and the fan arranged in the fan case 1. The fan is used to generate suction force after being started. The fan case 1 is arranged relatively far away from the cooking area of the user.

[0249] Generally, in a general kitchen environment, the top of the kitchen space is provided with a suspended ceiling 6. The oil smoke machine in the embodiment of the present application is mainly exemplified by being applied in the kitchen environment provided with the suspended ceiling 6.

[0250] In one embodiment, the center line of the impeller of the fan of the fan case assembly is perpendicular to the vertical wall, or the included angle between the center line of the impeller of the fan of the fan case assembly and the vertical wall is greater than or equal to 45° and less than 90°.

[0251] In the embodiment, the center line of the impeller of the fan is perpendicular to the vertical wall, or the included angle between the center line of the impeller of the fan of the fan case assembly and the vertical wall is greater than or equal to 45° and less than 90°, which specifically means that the fan is in a vertical installation form. When the fan is in the vertical installation form, the center line of the impeller can be horizontally arranged or is inclined at a small angle relative to the horizontal plane. When the center line of the impeller is inclined at a small angle relative to the horizontal plane, the included angle between the center line of the impeller and the horizontal plane is within 45°.

[0252] In the embodiment and the drawings of the present application, the fan is mainly exemplified in the vertical installation form. Other installation forms can be adjusted adaptively with reference to the present application, which will not be described one by one here.

[0253] Please refer to Figure 2 and Figure 3For the fan box 1, it has a fan box inlet 103 for leading in flue gas and a fan box outlet 102 for leading out flue gas. For a vertically installed fan, the center line of the fan box inlet 103 is perpendicular to the axis of the impeller of the fan. Specifically, the fan box inlet 103 can be arranged downward so as to directly interface with the smoke inlet hood 2 and facilitate corresponding assembly or disassembly operations by an operator.

[0254] In one embodiment, the fan box outlet 102 of the upper portion of the first side plate 134 of the fan box 1 of the fan box assembly is directed toward the top wall 7.

[0255] In the present embodiment, the upper portion of the first side plate 134 of the fan box 1 is inclined downwardly toward the second side plate 133, and because the upper portion of the first side plate 134 is provided with the fan box outlet 102, the fan box outlet 102 is at least partially arranged toward the top wall 7. Specifically, the center line of the fan box outlet 102 of the upper portion of the first side plate 134 of the fan box 1 of the fan box assembly forms a preset non-zero angle with the top wall 7. The specific effects of the inclined arrangement of the upper portion of the first side plate 134 of the fan box 1 can be referred to the specific description of the above-described embodiment of the fan box assembly, which will not be described herein again.

[0256] In one embodiment, the first dimension of the fan box 1 along the left-right direction X is between 100 mm and 450 mm, and the second dimension of the fan box 1 along the front-rear direction Y is between 100 mm and 450 mm.

[0257] In order to ensure that the fan box 1 can be installed in a conventional user's cabinet and meet the aesthetic requirements, the first dimension of the fan box 1 along the left-right direction X is between 100 mm and 450 mm, and the second dimension of the fan box 1 along the front-rear direction Y is between 100 mm and 450 mm. Taking vertical installation as an example, when the air inlet of the fan volute 11 is arranged toward the front-rear side, the first dimension can be the relative length dimension, and the second dimension can be the relative width dimension. Generally, based on the structure of the volute 11, the length dimension is greater than the width dimension. When the air inlet of the fan volute 11 is arranged toward the left-right side, the first dimension can be the relative width dimension, and the second dimension can be the relative length dimension. In the embodiments and drawings of the present application, the air inlet of the fan volute 11 is mainly taken as an example of being arranged toward the front-rear side.

[0258] It should be noted that in the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no prior or posterior order between them, nor can it be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0259] The above-described various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0260] The above is only several embodiments of the present application, although the embodiments disclosed by the present application are as above, but the content is only the embodiment adopted for the purpose of facilitating the understanding of the present application, and is not used to limit the present application. Any person skilled in the art of the present application can make any modification and change in the form and details of the embodiment without departing from the spirit and scope of the present application disclosed by the present application. However, the patent protection scope of the present application still needs to be limited by the scope defined by the appended claims.

Claims

1. A fan box assembly, characterized by, The fan box assembly comprises: a fan box and a smoke outlet seat, the smoke outlet seat and at least part of the fan box being used for mounting above a suspended ceiling; the fan box comprises oppositely arranged first and second side plates, the upper part of the first side plate having a fan box outlet; the mounting part of the smoke outlet seat is located on the inner side of the upper part of the first side plate or the mounting part of the smoke outlet seat is located on the outer side of the upper part of the first side plate; the fan box has a fan therein, the smoke outlet of the volute of the fan being in communication with the smoke outlet seat; the upper part of the first side plate is inclined from bottom to top towards the second side plate, the upper part of the first side plate and the lower part of the first side plate having a non-zero included angle.

2. The fan box assembly according to claim 1, wherein the fan box is used for mounting on or near a top wall.

3. The fan box assembly according to claim 2, wherein the height difference between the top of the fan box and the top wall is not greater than 90 mm.

4. The fan box assembly according to claim 1 or 2, wherein the smoke outlet seat is integrally inclined downwardly in the direction away from the fan box, or the smoke outlet seat is integrally horizontally extended in the direction away from the fan box, or the smoke outlet seat is integrally inclined upwardly in the direction away from the fan box and the highest point of the smoke outlet seat is not higher than the top of the fan box, or the smoke outlet seat is integrally inclined upwardly in the direction away from the fan box and the height difference between the highest point of the smoke outlet seat and the top of the fan box is not greater than the height difference between the top wall and the top of the fan box.

5. The fan box assembly according to claim 4, wherein the smoke outlet seat is integrally horizontally extended in the direction away from the fan box, the smoke outlet seat has a smoke inlet end and a smoke outlet end, the smoke outlet end is integrally vertically arranged or inclined arranged, and the smoke inlet end is inclined arranged from bottom to top in the direction away from the smoke outlet end.

6. The fan box assembly according to claim 4, wherein the smoke outlet seat is integrally inclined upwardly in the direction away from the fan box, the smoke outlet seat has a smoke inlet end and a smoke outlet end, the smoke outlet end is integrally vertically arranged or inclined arranged, and the smoke inlet end is inclined arranged from bottom to top in the direction away from the smoke outlet end.

7. The fan box assembly according to claim 4, wherein the smoke outlet seat is integrally inclined downwardly in the direction away from the fan box, the smoke outlet seat has a smoke inlet end and a smoke outlet end, the smoke outlet end is integrally vertically arranged or inclined arranged, and the smoke inlet end is inclined arranged from bottom to top in the direction away from the smoke outlet end.

8. The fan box assembly according to claim 4, wherein the plane where the mounting part of the smoke outlet seat is located is parallel to the plane where the fan box outlet of the upper part of the first side plate is located.

9. The fan box assembly according to claim 4, wherein An angle between a plane where the upper portion of the first side plate is located and a vertical direction is less than 14.9°, or greater than 15.1° and less than or equal to 75°, or equal to 15°.

10. The fan case assembly of claim 4, wherein, A ratio of a length of the upper portion of the first side plate to a total length of the first side plate is greater than or equal to a preset ratio, and the preset ratio is not less than 40% to 90%.

11. The fan case assembly of claim 4, wherein, A height of the upper portion of the first side plate in a vertical direction is less than or equal to 300 mm.

12. The fan case assembly of claim 1, wherein, An angle is formed between a plane where an air outlet of the volute is located and a plane where a fan case outlet of the upper portion of the first side plate is located, The fan case further comprises a transition connector, the air outlet of the volute is connected to the upper portion of the first side plate and / or the mounting portion of the smoke outlet seat through the transition connector, so that the air outlet of the volute is connected to the smoke outlet seat through the transition connector.

13. The fan case assembly of claim 12, wherein, One end of the transition connector is sealingly connected to the air outlet of the volute, and the other end of the transition connector is sealingly connected to the upper portion of the first side plate and / or the mounting portion of the smoke outlet seat.

14. The fan box assembly of claim 13, wherein, The transition connector has a first port connected to the air outlet of the volute and a second port connected to the smoke outlet seat, a plane where the first port is located is consistent with an extension direction of the plane where the air outlet of the volute is located, and an extension direction of a plane where the second port is located is consistent with an inclination direction of the upper portion of the first side plate and / or the mounting portion of the smoke outlet seat.

15. The fan case assembly of claim 14, wherein, The plane where the air outlet of the volute is located is parallel to a vertical direction, and the first port is parallel to the vertical direction.

16. The fan case assembly of claim 1, wherein, The smoke outlet of the volute of the fan, the first side plate, and the mounting portion of the smoke outlet seat are sequentially and directly or indirectly connected in a smoke flow direction, or the mounting portion of the smoke outlet seat, the first side plate, and the smoke outlet of the volute of the fan are sequentially and directly or indirectly connected in the smoke flow direction, or the first side plate, the mounting portion of the smoke outlet seat, and the smoke outlet of the volute of the fan are sequentially and directly or indirectly connected in the smoke flow direction, or the first side plate, the smoke outlet of the volute of the fan, and the mounting portion of the smoke outlet seat are sequentially and directly or indirectly connected in the smoke flow direction, or the mounting portion of the smoke outlet seat, the smoke outlet of the volute of the fan, and the first side plate are sequentially and directly or indirectly connected in the smoke flow direction, or the mounting portion of the smoke outlet seat, the first side plate, and the smoke outlet of the volute of the fan are sequentially and directly or indirectly connected in the smoke flow direction.

17. The fan box assembly of claim 1, wherein, The upper portion of the second side plate is inclined from bottom to top to the first side plate, and the upper portion of the second side plate has a non-zero angle with the lower portion of the second side plate.

18. The fan box assembly of claim 17, wherein, The upper portion of the second side plate is provided with a fan outlet hole.

19. The fan case assembly of claim 1, wherein the smoke outlet is mounted on the outer side of the upper portion of the first side plate, and the upper portion of the first side plate is provided with a flange at least at the lower edge of the fan case outlet, the flange being configured to cover the gap between the smoke outlet and the first side plate.

20. The fan case assembly of claim 19, wherein the fan case outlet is provided with a flange at the left edge and / or the right edge and / or the upper edge of the fan case outlet. The fan case assembly further comprises a smoke inlet cover, the lower portion of the fan case is connected with the smoke inlet cover, and the smoke gas can flow into the fan case through the smoke inlet cover. The upper cover portion of the smoke inlet cover covers the fan case and forms a gap with the fan case, the smoke outlet is mounted on the outer side of the upper portion of the first side plate by a connecting member, and a guide plate is arranged between the smoke outlet and the smoke inlet cover, the guide plate being configured to guide the oil stains at the connecting position to the gap.

21. The fan box assembly of claim 1, wherein, The guide plate is fixed on the smoke inlet cover and / or the smoke outlet.

22. The fan box assembly of claim 21, wherein, The guide plate is integrally formed with the smoke inlet cover and / or the smoke outlet.

23. The fan box assembly of claim 22, wherein, The upper end of the guide plate is fixed on the smoke outlet, the upper cover portion of the smoke inlet cover covers the periphery of the fan case, and the lower end of the guide plate is inserted into the gap.

24. The fan box assembly of claim 22, wherein, The smoke inlet cover is provided with an oil leakage structure, and the oil liquid guided by the guide plate to the gap can flow into the smoke inlet cover through the oil leakage structure.

25. The fan box assembly of claim 23, wherein, The front side plate of the fan case is asymmetrically provided with a plurality of first mounting holes, the rear side plate of the fan case is asymmetrically provided with a plurality of second mounting holes, the plurality of first mounting holes coincide with the positions of the plurality of second mounting holes after being rotated by 180° around the vertical center line, and the first mounting holes and the second mounting holes are configured to connect the smoke inlet cover; and / or the left side plate of the fan case is asymmetrically provided with a plurality of third mounting holes, the right side plate of the fan case is asymmetrically provided with a plurality of fourth mounting holes, the plurality of third mounting holes coincide with the plurality of fourth mounting holes after being rotated by 180° around the vertical center line, and the third mounting holes and the fourth mounting holes are configured to connect the smoke inlet cover.

26. The fan box assembly of claim 25, wherein, The smoke outlet has a smoke inlet end and a smoke outlet end, the smoke inlet end is arranged to be inclined relative to the vertical direction, and the smoke outlet end is arranged to be vertical or inclined relative to the vertical direction.

27. The blower box assembly of claim 21, wherein, When the smoke outlet is in the mounted state, the smoke inlet end is inclined downward from top to bottom to the smoke outlet end.

28. The fan box assembly of claim 1, wherein, When the smoke outlet is in the mounted state, the plane where the smoke inlet end is located intersects the plane where the smoke outlet end is located.

29. The fan box assembly of claim 28, wherein, The inner surface of the fan case is further provided with a noise reduction structure, the noise reduction structure is arranged opposite to the air inlet of the volute of the fan, and the noise reduction structure comprises a noise reduction layer and a fixing mechanism for fixing the noise reduction layer on the inner surface of the fan case.

30. The fan box assembly of claim 29, wherein, The surface of the fixing mechanism has a non-microporous hollow structure.

31. The fan box assembly of claim 1, wherein, The extractor hood comprises a fan case assembly as claimed in any one of claims 1 to 32.

32. The blower box assembly of claim 31, wherein, 34. The extractor hood of claim 33, wherein 33. A range hood, characterized by ​ ​ The range hood further comprises a smoke pipe and a smoke collecting cavity, the fan box assembly, the smoke pipe and the smoke collecting cavity are arranged close to a vertical wall surface and are sequentially connected from top to bottom.

35. The range hood of claim 34, wherein, a center line of an impeller of the fan of the fan box assembly is perpendicular to the vertical wall surface, or an included angle between the center line of the impeller of the fan of the fan box assembly and the vertical wall surface is greater than or equal to 45° and less than 90°.

36. The range hood of claim 34, wherein, a first side plate of the fan box of the fan box assembly has a first side plate upper portion, and a plane on which the first side plate upper portion is located has a preset included angle with the top wall, and the preset included angle is not 90°.

37. The range hood of claim 34, wherein, the fan box outlet of the first side plate upper portion of the fan box of the fan box assembly faces the top wall.

38. The range hood of claim 37, wherein, a center line of the fan box outlet of the first side plate upper portion of the fan box of the fan box assembly has a preset non-zero included angle with the top wall.

39. The hood as claimed in claim 34, wherein, the fan box has a fan box inlet for guiding in flue gas, and a center line of the fan box inlet is perpendicular to an axis of the impeller of the fan.

40. The hood as claimed in claim 34, wherein, the fan box has a first dimension along a left-right direction of 100 mm to 450 mm, and a second dimension along a front-rear direction of 100 mm to 450 mm.

Images