Split range hood

Abstract

The utility model discloses a split range hood which comprises a fan box, a smoke inlet cover, a smoke pipe and a smoke collecting cavity, and the fan box, the smoke inlet cover, the smoke pipe and the smoke collecting cavity are close to a side wall and are sequentially connected from top to bottom; a fan is arranged in the fan box, and at least part of the fan is arranged above a suspended ceiling; the smoke inlet cover is hermetically connected with the fan box, and at least part of the smoke inlet cover shields at least part of the fan; an air inlet flow channel is formed in the smoke inlet cover, and smoke in the smoke pipe can flow into the fan box through the air inlet flow channel; the lower portion of the smoke inlet cover and the upper portion of the smoke pipe are in non-detachable fixed sealing connection or detachable sealing connection, or the lower portion of the smoke inlet cover and the upper portion of the smoke pipe are integrally formed, or the lower portion of the smoke inlet cover is in butt joint with the upper portion of the smoke pipe. According to the split range hood provided by the embodiment of the invention, the noise reduction performance of the split range hood can be at least improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen home appliance technical field, especially relate to a split range hood. BACKGROUND

[0002] The range hood has become one of indispensable kitchen home appliances in modern family. The main function of the range hood is to suck away the oil fume during cooking, thereby maintaining a good kitchen environment.

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

[0004] But the performance of the split range hood, such as noise reduction performance, needs to be further improved. INVENTION CONTENTS

[0005] In view of the defects of the prior art, the utility model embodiment provides a split range hood, which can at least improve the noise reduction performance of the split range hood.

[0006] The specific technical scheme of the utility model embodiment is:

[0007] A split range hood, the split range hood comprises: a fan box, an inlet smoke cover, a smoke pipe and a smoke collecting cavity, the fan box, the inlet smoke cover, the smoke pipe and the smoke collecting cavity are sequentially connected from top to bottom close to the side wall; the fan box has a fan inside, the fan is used for being at least partially arranged above the ceiling; the inlet smoke cover is sealingly connected with the fan box, at least part of the inlet smoke cover shields at least part of the fan; an air inlet flow channel is formed in the inside of the inlet smoke cover, the flue gas in the smoke pipe can flow into the fan box through the air inlet flow channel; the lower part of the inlet smoke cover is inserted into the upper part of the smoke pipe, the outer surface of the lower part of the inlet smoke cover and the inner surface of the upper part of the smoke pipe are fixedly and sealingly connected or detachably and sealingly connected, or the upper part of the smoke pipe is inserted into the lower part of the inlet smoke cover, the inner surface of the lower part of the inlet smoke cover and the outer surface of the upper part of the smoke pipe are fixedly and sealingly connected or detachably and sealingly connected, or the lower part of the inlet smoke cover and the upper part of the smoke pipe are integrally formed, or the lower part of the inlet smoke cover and the upper part of the smoke pipe are in abutment.

[0008] In a preferred embodiment, the inlet smoke cover comprises a front cover wall, the front cover wall shields at least part of the front side plate of the fan box and is sealingly connected with the front side plate.

[0009] In a preferred embodiment, the smoke inlet cover further comprises a left cover wall and a right cover wall, the left cover wall shielding at least part of the left side plate of the fan box and being sealingly connected with the left side plate, and the right cover wall shielding at least part of the right side plate of the fan box and being sealingly connected with the right side plate.

[0010] In a preferred embodiment, the smoke inlet cover further comprises a back cover wall, the back cover wall shielding at least part of the back side plate of the fan box and being sealingly connected with the back side plate.

[0011] In a preferred embodiment, the center line of the fan wheel is perpendicular to the vertical wall surface, or the included angle between the center line of the fan wheel and the vertical wall surface is greater than or equal to 45° and less than 90°.

[0012] In a preferred embodiment, the smoke inlet cover at least covers at least part of the area of the fan below the inlet of the volute.

[0013] In a preferred embodiment, the projection of the smoke inlet cover towards the volute of the fan is close to or located at the lower edge of the inlet of the volute.

[0014] In a preferred embodiment, the smoke inlet cover at least covers at least part of the inlet of the volute of the fan.

[0015] In a preferred embodiment, the overlapping area of the projection of the smoke inlet cover towards the inlet of the volute of the fan and the inlet of the volute is greater than, equal to, or less than 1 / 2 of the area of the inlet of the volute.

[0016] In a preferred embodiment, the center line of the fan wheel is parallel to the wall surface, or the included angle between the center line of the fan wheel and the wall surface is greater than 0° and less than 45°.

[0017] In a preferred embodiment, the projection of the smoke inlet cover towards the volute of the fan is at least above the inlet of the volute of the fan.

[0018] In a preferred embodiment, the projection of the smoke inlet cover towards the volute of the fan at least coincides with the fan wheel.

[0019] In a preferred embodiment, the lower part of the volute of the fan protrudes the fan box in the height direction.

[0020] In a preferred embodiment, the height difference between the lowest position of the lower part of the volute and the lowest position of the fan box is greater than 15 mm and / or less than 220 mm.

[0021] In a preferred embodiment, the ratio of the height difference between the lowest position of the lower part of the volute and the lowest position of the fan box to the total height of the volute is greater than 4% and / or less than 60%.

[0022] In a preferred embodiment, the height dimension of one of the front side plate, the rear side plate, the left side plate and the right side plate of the fan box is not greater than 385 mm.

[0023] In a preferred embodiment, the lowest position of the fan box is above, at or below the lowest position of the air inlet of the volute of the fan in the height direction.

[0024] In a preferred embodiment, the lowest position of the fan box is at or below the lowest position of the air inlet of the volute of the fan in the height direction, and the inner surface of the fan box is further provided with a noise reduction structure, which is arranged opposite to the air inlet of the volute of the fan.

[0025] In a preferred embodiment, 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, and the surface of the fixing mechanism is provided with a non-microporous hollow structure.

[0026] In a preferred embodiment, the bottom of the fan box is lower than or flush with the bottom of the volute of the fan in the height direction.

[0027] In a preferred embodiment, the smoke inlet hood further comprises an enlarged portion, which is located downstream of the lower part of the smoke inlet hood in the direction of the flue gas flow.

[0028] In a preferred embodiment, the enlarged portion and the lower part of the smoke inlet hood further have a connecting portion therebetween, which comprises a platform portion or a gradually expanding portion.

[0029] In a preferred embodiment, the upper end of the lower part of the smoke inlet hood extends outwardly to form the platform portion, and the outer edge of the platform portion extends upwardly to form the enlarged portion, or the upper end of the lower part of the smoke inlet hood extends outwardly and upwardly to form the gradually expanding portion, and the outer edge of the gradually expanding portion extends upwardly to form the enlarged portion.

[0030] In a preferred embodiment, at least part of the enlarged portion shields at least part of the fan.

[0031] In a preferred embodiment, the enlarged portion and the connecting portion have a lead angle at the joint, and the lead angle is located below the side of the air inlet of the volute of the fan.

[0032] In a preferred embodiment, the smoke inlet cover is a plastic smoke inlet cover or a metal smoke inlet cover.

[0033] In a preferred embodiment, the split range hood further comprises a decorative cover, and the largest cross section of the smoke inlet cover is projected downwardly within the outlet of the smoke collecting cavity, so that the decorative cover can cover the air outlet of the smoke collecting cavity and the smoke inlet cover.

[0034] In a preferred embodiment, the split range hood further comprises a smoke outlet seat, and the smoke outlet seat is used to be installed above the ceiling; the fan box comprises oppositely arranged first and second side plates, and the upper portion of the first side plate has a fan box outlet; the mounting portion of the smoke outlet seat is located on the inner side of the upper portion of the first side plate or the mounting portion of the smoke outlet seat is located on the outer side of the upper portion of the first side plate; the smoke outlet of the volute of the fan is in communication with the smoke outlet seat; the upper portion of the first side plate is inclined from bottom to top to the second side plate, and the upper portion of the first side plate and the lower portion of the first side plate have a non-zero included angle.

[0035] In a preferred embodiment, the fan box is installed on or near the top wall.

[0036] In a preferred embodiment, the height difference between the top of the fan box and the top wall is not greater than 90 mm.

[0037] In a preferred embodiment, 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.

[0038] In a preferred embodiment, 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 inclinedly arranged, and the smoke inlet end is inclinedly arranged from bottom to top in the direction away from the smoke outlet end.

[0039] In a preferred embodiment, the smoke outlet seat extends integrally upward in a direction away from the fan box, the smoke outlet seat has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is integrally vertically arranged or obliquely arranged, and the flue gas inlet end is obliquely arranged from bottom to top in a direction away from the flue gas outlet end.

[0040] In a preferred embodiment, the smoke outlet seat extends integrally downward in a direction away from the fan box, the smoke outlet seat has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is integrally vertically arranged or obliquely arranged, and the flue gas inlet end is obliquely arranged from bottom to top in a direction away from the flue gas outlet end.

[0041] 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 box outlet of the upper portion of the first side plate is located.

[0042] 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°.

[0043] In a preferred embodiment, the ratio 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 ratio, and the preset ratio is not less than 40% to 90%.

[0044] 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.

[0045] In a preferred embodiment, the center line of the inlet of the fan box is perpendicular to the axis of the impeller of the fan.

[0046] In a preferred embodiment, the first dimension of the fan box along the left-right direction is between 100 mm and 450 mm, and the second dimension of the fan box along the front-rear direction is between 100 mm and 450 mm.

[0047] In a preferred embodiment, the front side plate of the fan box is asymmetrically provided with a plurality of first mounting holes, the rear side plate of the fan box 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 rotating 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 box is asymmetrically provided with a plurality of third mounting holes, the right side plate of the fan box 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 rotating 180° around the vertical center line, and the third mounting holes and the fourth mounting holes are used to connect the smoke inlet cover.

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

[0049] In the embodiment, at least part of the smoke inlet cover shields at least part of the fan, so that the smoke inlet cover and the fan at least partially coincide in a projection toward the vertical side. The smoke inlet cover is equivalent to adding a stop structure in the path of fan propagation noise, which can hinder the noise from being transmitted outward when the fan is working, thereby improving the noise reduction performance of the range hood.

[0050] In addition, the smoke inlet cover is sealingly connected with the fan box, which can ensure that the smoke inlet cover and the fan box remain relatively fixed and that the oil fume cannot escape from the position where they cooperate, while preventing the noise generated when the fan is working from being transmitted outward through the gap between the smoke inlet cover and the fan box. In addition, the sealing connection between the smoke inlet cover and the fan box can also prevent airflow from being generated at the gap between the smoke inlet cover and the fan box, thereby causing a howling sound that affects the noise reduction effect of the range hood.

[0051] With reference to the following description and drawings, specific embodiments of the utility model are disclosed in detail, and the principles 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 1 A structural schematic diagram of a split range hood provided in the embodiments of the present application;

[0054] Figure 2 An exploded view of a split range hood provided in the embodiments of the present application;

[0055] Figure 3 A front view of the cooperation between the fan box and the smoke inlet cover in a split range hood provided in the embodiments of the present application;

[0056] Figure 4 A side view of the cooperation between the fan case and the smoke inlet cover in a split range hood according to an embodiment of the present application;

[0057] Figure 5 A sectional view of the cooperation between the fan case and the smoke inlet cover in a split range hood according to an embodiment of the present application;

[0058] Figure 6 A structural schematic view of the fan case in a split range hood according to an embodiment of the present application;

[0059] Figure 7 A structural schematic view of the smoke inlet cover in a split range hood according to an embodiment of the present application;

[0060] Figure 8 A top view of the smoke inlet cover in a split range hood according to an embodiment of the present application;

[0061] Figure 9 A schematic view of the cooperation between the smoke inlet cover and the smoke pipe in a split range hood according to an embodiment of the present application;

[0062] Figure 10 A sectional view of the cooperation between the smoke inlet cover and the smoke pipe in a split range hood according to an embodiment of the present application;

[0063] Figure 11 A schematic view of the internal structure of the fan case in a split range hood according to an embodiment of the present application;

[0064] Figure 12 A right view of the fan case in a split range hood according to an embodiment of the present application.

[0065] Reference signs of the present application:

[0066] 1. fan case;

[0067] 102. air outlet;

[0068] 103. inlet;

[0069] 11. volute;

[0070] 111. air inlet;

[0071] 131. front side plate;

[0072] 132. rear side plate;

[0073] 133. left side plate;

[0074] 134. right side plate;

[0075] 135. top plate;

[0076] 601、third mounting hole;

[0077] 602、fourth mounting hole;

[0078] 65、fixing mechanism;

[0079] 2、smoke inlet cover;

[0080] 20、connecting portion;

[0081] 21、first adapter portion;

[0082] 22、enlarged portion;

[0083] 23、guide angle;

[0084] 201、front cover wall;

[0085] 202、rear cover wall;

[0086] 203、left cover wall;

[0087] 204、right cover wall;

[0088] 3、smoke pipe;

[0089] 31、second adapter portion;

[0090] 4、smoke collecting cavity;

[0091] 5、smoke outlet seat;

[0092] 6、ceiling;

[0093] 7、top wall;

[0094] 8、decorative cover;

[0095] X、left-right direction;

[0096] Y、front-rear direction;

[0097] Z、height direction. DETAILED DESCRIPTION

[0098] The technical solutions of the present application will be described in detail below in combination with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. After reading the present application, those skilled in the art can make various equivalent modifications to the present application, and all such modifications fall within the scope of the appended claims.

[0099] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "up", "down", "left", "right", and the like are merely used for the purpose of explanation and are not intended to limit the present application.

[0100] 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 of the application 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.

[0101] The utility model provides a kind of split range hood, at least can improve the noise reduction performance of split range hood.

[0102] Please refer to Figures 1 to 12 , the present application specification embodiment provides a kind of split range hood, the split range hood can include: fan box 1, smoke cover 2, smoke pipe 3 and smoke collecting cavity 4, the fan box 1, smoke cover 2, smoke pipe 3 and smoke collecting cavity 4 are sequentially connected from top to bottom close to side wall;The fan box 1 has fan, and the fan is used to at least partially set above the ceiling 6;The smoke cover 2 is sealingly connected with the fan box 1, and at least part of the smoke cover 2 shields at least part of the fan;The inside of the smoke cover 2 is formed with air inlet flow channel, and the flue gas in the smoke pipe 3 can flow into the fan box 1 through the air inlet flow channel;The lower part of the smoke cover 2 is inserted into the upper part of the smoke pipe 3, and the outer surface of the lower part of the smoke cover 2 and the inner surface of the upper part of the smoke pipe 3 are not detachably fixedly and sealingly connected or detachably sealingly connected, or the upper part of the smoke pipe 3 is inserted into the lower part of the smoke cover 2, and the inner surface of the lower part of the smoke cover 2 and the outer surface of the upper part of the smoke pipe 3 are not detachably fixedly and sealingly connected or detachably sealingly connected, or the lower part of the smoke cover 2 and the upper part of the smoke pipe 3 are integrally formed, or the lower part of the smoke cover 2 and the upper part of the smoke pipe 3 are opposite.

[0103] In the present application embodiment, as Figure 1 And Figure 2As shown, this split-type range hood may include a fan box 1, a smoke inlet hood 2, a smoke pipe 3, and a smoke collection chamber 4. Along the direction of smoke flow, the smoke collection chamber 4, smoke pipe 3, smoke inlet hood 2, and fan box 1 can be arranged sequentially. Specifically, the smoke collection chamber 4, smoke pipe 3, smoke inlet hood 2, and fan box 1 can be vertically arranged against the wall from bottom to top. The smoke collection chamber 4 is positioned relatively close to the user's cooking area to collect the smoke generated during cooking. The fan box 1 contains a fan for suction of the smoke, and is positioned relatively away from the user's cooking area.

[0104] In a typical kitchen environment, a suspended ceiling 6 is installed above the kitchen space. The range hood in this application embodiment is mainly illustrated using a kitchen environment with a suspended ceiling 6 as an example. Of course, the fan of the range hood protected in this application embodiment can also be used in scenarios where a suspended ceiling 6 is not installed. Therefore, it should be noted that under the actual working conditions after the range hood is installed, regardless of whether the fan is installed above the suspended ceiling 6, it is within the scope of protection of this application.

[0105] In this embodiment, the fan housing 1 contains a fan, which is at least partially positioned above the ceiling 6. For a range hood, the fan in the fan housing 1 is the primary source of noise. Positioning the fan at least partially above the ceiling 6, away from the user, helps reduce the noise generated during operation. Furthermore, with the fan positioned further away from the user, the distance to the stove where the fumes are generated is also relatively greater, effectively reducing the amount of grease adsorbed on the fan impeller and volute 11. This prevents grease buildup on the fan, ensuring reliable operation and extending its lifespan.

[0106] like Figure 3 and Figure 4 As shown, the smoke inlet hood 2 and the fan housing 1 are sealed together. Specifically, the relative positional relationship between the smoke inlet hood 2 and the fan housing 1 can be: the upper part of the smoke inlet hood 2 can cover the outer side of the fan housing 1, or the upper part of the smoke inlet hood 2 can extend into the inner side of the fan housing 1, or the upper end of the smoke inlet hood 2 and the lower end of the fan housing 1 are connected. In the embodiments and drawings of this application, the embodiment in which the upper part of the smoke inlet hood 2 covers the outer side of the fan housing 1 is mainly described in detail. Other embodiments can refer to this typical embodiment, and will not be described in detail here.

[0107] The smoke inlet cover 2 is sealingly connected with the smoke pipe 3 or integrally formed. Specifically, the lower part of the smoke inlet cover 2 is inserted into the upper part of the smoke pipe 3, and the outer surface of the lower part of the smoke inlet cover 2 is sealingly connected with the inner surface of the upper part of the smoke pipe 3 in a non-detachable fixed manner or in a detachable manner, or the upper part of the smoke pipe 3 is inserted into the lower part of the smoke inlet cover 2, and the inner surface of the lower part of the smoke inlet cover 2 is sealingly connected with the outer surface of the upper part of the smoke pipe 3 in a non-detachable fixed manner or in a detachable manner, or the lower part of the smoke inlet cover 2 is integrally formed with the upper part of the smoke pipe 3, or the lower part of the smoke inlet cover 2 is in abutment with the upper part of the smoke pipe 3.

[0108] In the embodiments of the present application, the smoke inlet cover 2 is a transition piece for connecting the smoke pipe 3 with the smoke inlet cover 2. The lower part of the smoke inlet cover 2 and the upper part of the smoke pipe 3 can be integrally formed or sealingly connected.

[0109] As shown in Figs. 1 and 2, in some embodiments, the lower part of the smoke inlet cover 2 has a first adapter 21 for connecting a second adapter 31 of the upper part of the smoke pipe 3. Figure 9 Figure 10 As shown in Figs. 1 and 2, in some embodiments, the lower part of the smoke inlet cover 2 has a first adapter 21 for connecting a second adapter 31 of the upper part of the smoke pipe 3.

[0110] In the first adapter 21, the inner part of the first adapter 21 and the inner part of the smoke inlet cover 2 above the first adapter 21 form an air inlet channel, and the flue gas in the smoke pipe 3 can flow into the fan box 1 through the air inlet channel.

[0111] The first adapter 21 of the lower part of the smoke inlet cover 2 is mainly used to match the second adapter 31 of the upper part of the smoke pipe 3. The specific structure of the first adapter 21 can match the structure of the second adapter 31 of the upper part of the smoke pipe 3. For example, when the cross section of the second adapter 31 of the smoke pipe 3 is circular, the cross section of the first adapter 21 can also be circular, and when the cross section of the second adapter 31 of the smoke pipe 3 is rectangular, the cross section of the first adapter 21 can also be rectangular. Of course, the structure of the second adapter 31 or the first adapter 21 is not limited to the above examples, and other changes can be made according to the needs of those skilled in the art.

[0112] In the first adapter 21, the inner part of the first adapter 21 and the inner part of the smoke inlet cover 2 above the first adapter 21 form an air inlet channel, and the flue gas in the smoke pipe 3 can flow into the fan box 1 through the air inlet channel.

[0113] ​Specifically, the first adapter 21 is inserted into the second adapter 31, and the outer surface of the first adapter 21 is in a non-detachable fixed sealing connection or a detachable sealing connection with the inner surface of the second adapter 31, or the second adapter 31 is inserted into the first adapter 21, and the inner surface of the first adapter 21 is in a non-detachable fixed sealing connection or a detachable sealing connection with the outer surface of the second adapter 31, or the first adapter 21 and the second adapter 31 are integrally formed.

[0114] The non-detachable fixed sealing connection can be achieved by sealing glue, or a tape can be wound on the position of the sealing glue, or a threaded fastener can be additionally provided on the position of the sealing glue, and then a tape can be wound, or the non-detachable fixed sealing connection can be achieved by other methods, which are not limited to the above description. Based on the technical essence of the present application, those skilled in the art can make other changes, as long as the functions and effects achieved are the same or similar to those of the present application, which should be covered by the protection scope of the present application.

[0115] The detachable sealing connection can be achieved by providing a sealing member and a threaded fastener, or the threaded fastener can be replaced by other methods such as snap connection, or the detachable sealing connection can be achieved by other methods, which are not limited to the above description. Based on the technical essence of the present application, those skilled in the art can make other changes, as long as the functions and effects achieved are the same or similar to those of the present application, which should be covered by the protection scope of the present application.

[0116] In addition, the smoke inlet cover 2 can be integrally formed with the smoke pipe 3. For example, the smoke pipe 3 and the smoke inlet cover 2 are both plastic parts, and they are integrally injection molded.

[0117] In the present embodiment, at least part of the smoke inlet cover 2 blocks at least part of the fan. Specifically, at least part of the smoke inlet cover 2 blocks at least part of the fan, specifically, the smoke inlet cover 2 and the fan at least partially overlap in the projection toward the vertical side. The smoke inlet cover 2 is equivalent to adding a stop structure on the path of the noise propagated by the fan, so that the noise generated when the fan works can be blocked from being transmitted outward by the smoke inlet cover 2, thereby improving the noise reduction performance of the range hood.

[0118] In the present embodiment, the smoke inlet cover 2 is sealingly connected with the fan box 1, so as to ensure that the smoke inlet cover 2 and the fan box 1 can be relatively fixed and the oil fume cannot escape from the joint position of the two, and at the same time, the noise generated when the fan works can be prevented from being transmitted outward from the gap between the smoke inlet cover 2 and the fan box 1. In addition, the sealing connection between the smoke inlet cover 2 and the fan box 1 can also prevent airflow from being generated at the gap between the smoke inlet cover 2 and the fan box 1, so as to avoid the occurrence of a howling sound, which affects the noise reduction effect of the range hood.

[0119] Please refer to Figure 7 and Figure 8 In some embodiments, the smoke inlet cover 2 can further comprise an enlarged portion 22, which is located downstream of the lower part of the smoke inlet cover 2 in the direction of the smoke flow.

[0120] In the present embodiment, the smoke inlet cover 2 can be a hollow cover body with a certain wall thickness and variable cross-section. Specifically, the smoke inlet cover 2 can be a plastic smoke inlet cover or a metal smoke inlet cover. Of course, the material of the smoke inlet cover 2 can also be other types, and is not limited to the above description. Those skilled in the art can also make other changes under the technical essence of the present application, as long as the functions and effects achieved are the same or similar to the present application, and should be covered within the protection scope of the present application. In the embodiments of the present application, the material of the smoke inlet cover 2 is mainly taken as a plastic form for example. When the smoke inlet cover 2 is a plastic smoke inlet cover, the smoke inlet cover 2 can be formed by one-piece injection molding, which is not only beneficial to control the dimensional accuracy of each position of the smoke inlet cover 2, but also beneficial to reduce the manufacturing cost and processing difficulty.

[0121] The smoke inlet cover 2 can comprise a first adapter portion 21 and an enlarged portion 22. In the direction of the smoke flow, the enlarged portion 22 is located downstream of the first adapter portion 21. The flow area of the enlarged portion 22 is larger than that of the first adapter portion 21. When the smoke in the smoke pipe 3 enters the fan box 1 through the smoke inlet cover 2, the flow area will increase, which will reduce the speed and resistance of the oil fume flow, and is beneficial to reduce the noise, thereby improving the noise reduction performance of the range hood. When the smoke inlet cover 2 is provided with the enlarged portion 22, the enlarged portion 22 is assembled with the fan box 1.

[0122] The enlarged portion 22 at least covers at least part of the fan. When the enlarged portion 22 covers part of the fan, for the case that the enlarged portion 22 covers the fan box 1, it is equivalent to adding a layer of barrier on the flow path of the fan propagation noise, which is also beneficial to further improve the noise reduction performance of the range hood. In addition, when the enlarged portion 22 covers at least part of the fan, the height of the side plate of the fan box 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 box 1 is made of relatively high-cost sheet metal, which is beneficial to reduce the cost of the range hood.

[0123] As Figure 8 shown, in one embodiment, the enlarged portion 22 and the first adapter portion 21 further have a connecting portion 20 therebetween, and the connecting portion 20 comprises a platform portion or a gradually expanding portion.

[0124] In the embodiment, the enlarged portion 22 and the first adapter portion 21 can be connected and transitioned through the connecting portion 20. Specifically, the connecting portion 20 can be a platform portion, which can extend along a horizontal plane as a whole, or the connecting portion 20 can be a gradually expanding portion with gradually increasing cross-section, or the connecting portion 20 can be other configurations that are beneficial to efficiently guide the flue gas flowing from the lower first adapter portion 21 into the enlarged portion 22.

[0125] When the connecting portion 20 is a platform portion, the upper portion of the first adapter portion 21 extends outwardly and forms the platform portion, and the outer edge of the platform portion extends upwardly after being folded to form the enlarged portion 22.

[0126] Alternatively, when the connecting portion 20 is a gradually expanding portion, the upper portion of the first adapter portion 21 extends outwardly and upwardly to form the gradually expanding portion, and the outer edge of the gradually expanding portion extends upwardly after being folded to form the enlarged portion 22.

[0127] As shown in Figure 7 and Figure 8 , in an embodiment, the enlarged portion 22 has a guide angle 23 at the connection with the connecting portion 20, and the guide angle 23 is located below the side of the inlet 111 of the volute 11 of the fan.

[0128] In the embodiment, by providing the guide angle 23 at the connection between the enlarged portion 22 and the connecting portion 20, the flow of the flue gas through this position can be improved, so that the flue gas smoothly turns along the curved surface of the chamfer, reduces the formation of vortex, thereby reducing the generation of noise, and more efficiently guides the flue gas to the inlet 111 of the fan volute 11 with lower resistance.

[0129] In addition, by providing the guide angle 23 at the connection between the enlarged portion 22 and the connecting portion 20, the mechanical properties of the flue gas inlet hood 2 at the variable cross-section position can be improved, avoiding stress concentration at the sharp corner position, thereby ensuring that the flue gas inlet hood 2 has a longer service life.

[0130] Please refer to Figure 5 , Figure 6 and Figure 8 for details. Specifically, the flue gas inlet hood 2 includes a front hood wall 201, which blocks at least part of the front side plate 131 of the fan box 1 and is sealingly connected with the front side plate 131.

[0131] For the smoke inlet cover 2, it can include a front cover wall 201. Generally, the range hood is installed with the rear side against the wall, and the user is usually located in the front side of the range hood during use. In order to prevent the oil fume and the noise generated by the fan during operation from being transmitted to the front side for the first time, and to prevent the front cover wall 201 of the smoke inlet cover 2 and the front side plate 131 of the fan box 1 from generating sharp noise, affecting the user's experience, the front cover wall 201 of the smoke inlet cover 2 and the front side plate 131 of the fan box 1 can be sealingly connected.

[0132] Further, the smoke inlet cover 2 further includes a left cover wall 203 and a right cover wall 204, the left cover wall 203 shields at least part of the left side plate 133 of the fan box 1 and is sealingly connected with the left side plate 133, and the right cover wall 204 shields at least part of the right side plate 134 of the fan box 1 and is sealingly connected with the right side plate 134.

[0133] In the embodiment, the smoke inlet cover 2 can further include a left cover wall 203 and a right cover wall 204 located on both sides of the front cover wall 201. The left cover wall 203 is correspondingly arranged with the left side plate 133 of the fan box 1, which can shield at least part of the left side plate 133 of the fan box 1, and the left cover wall 203 is sealingly connected with the left side plate 133. The right cover wall 204 is correspondingly arranged with the right side plate 134 of the fan box 1, which can shield at least part of the right side plate 134 of the fan box 1, and the right cover wall 204 is sealingly connected with the right side plate 134.

[0134] The relative position relationship and sealing connection of the left cover wall 203 and the left side plate 133 achieve the technical effects described above for the front cover wall 201 and the front side plate 131, which will not be repeated here.

[0135] Further, the smoke inlet cover 2 further includes a rear cover wall 202, which shields at least part of the rear side plate 132 of the fan box 1 and is sealingly connected with the rear side plate 132.

[0136] In the embodiment, the smoke inlet cover 2 can further include a rear cover wall 202 opposite to the front cover wall 201. The rear cover wall 202 is oppositely arranged with the rear side plate 132 of the fan box 1, which can shield at least part of the rear side plate 132 of the fan box 1, and the rear cover wall 202 is sealingly connected with the rear side plate 132. The relative position relationship and sealing connection of the rear cover wall 202 and the rear side plate 132 achieve the technical effects described above for the front cover wall 201 and the front side plate 131, which will not be repeated here.

[0137] When the circumferential direction of the smoke inlet cover 2 (the front cover wall 201, the rear cover wall 202, the left cover wall 203, and the right cover wall 204) is overlapped with the side plate of the fan box 1 and is sealedly connected, the noise reduction effect of the range hood can be further improved, and the versatility of the smoke inlet cover 2 can be improved, so that the smoke inlet cover 2 can be applied to more scenes, including a scene of being installed vertically against a wall and a scene of being suspended.

[0138] In some embodiments, the center line of the impeller of the fan is perpendicular to the vertical wall surface, or the angle between the center line of the impeller of the fan and the vertical wall surface is greater than or equal to 45° and less than 90°.

[0139] In the present embodiment, the center line of the impeller of the fan is perpendicular to the vertical wall surface, or the angle between the center line of the impeller of the fan of the fan box 1 assembly and the vertical wall surface 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 a vertical installation form, the center line of the impeller can be horizontally arranged or 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 angle between the center line of the impeller and the horizontal plane is within 45°.

[0140] In the embodiments and drawings of the present application, the fan is mainly exemplified in a vertical installation form, and other installation forms can be adjusted adaptively with reference to the present application, which will not be described one by one here.

[0141] As shown in Figure 12 For the fan box 1, the fan box 1 inlet 103 for introducing flue gas and the fan box 1 air outlet 102 for discharging flue gas are provided. For the fan in a vertical installation form, the center line of the fan box 1 inlet 103 is perpendicular to the axis of the impeller of the fan. Specifically, the fan box 1 inlet 103 can be arranged downward to directly connect with the smoke inlet cover 2 and facilitate the corresponding assembly or disassembly operation of the operator.

[0142] Please refer to Figure 11 and Figure 12 In an embodiment, the smoke inlet cover 2 covers at least the part of the fan below the air inlet 111 of the volute 11.

[0143] For the above-mentioned fan in a vertical installation form, the fan has a volute 11, and the air inlet 111 is arranged on the volute 11 and arranged along the height direction Z. The air inlet 111 can be arranged at the middle part of the volute 11. The air inlet 111 has opposite highest and lowest positions. The highest position (the uppermost end) of the smoke inlet cover 2 can be located below the lowest position of the air inlet 111 and can cover at least part of the volute 11.

[0144] Thus, since the smoke inlet cover 2 covers at least part of the volute 11, the height of the fan box 1 can be properly reduced, thereby reducing the cost of the range hood. In particular, when the smoke inlet cover 2 is made of plastic which has a relatively low cost, and the fan box 1 is made of metal which has a higher cost than plastic, the cost of the range hood can be significantly reduced.

[0145] When the highest position of the smoke inlet cover 2 is below the lowest position of the air inlet 111, the operation of mounting and dismounting the smoke inlet cover 2 and the fan box 1 can be performed at a proper height, thereby facilitating the convenience of subsequent maintenance operations.

[0146] Further, the highest position of the projection of the smoke inlet cover 2 towards the volute 11 of the fan is close to or located at the lower edge of the air inlet 111 of the volute 11.

[0147] More specifically, the highest position of the projection of the smoke inlet cover 2 towards the volute 11 of the fan is close to the lower edge (i.e. the lowest position) of the air inlet 111 of the volute 11. Here, close to can mean that the highest position of the projection of the smoke inlet cover 2 towards the volute 11 of the fan is slightly higher or slightly lower than the lower edge of the air inlet 111 of the volute 11.

[0148] When the smoke inlet cover 2 and the air inlet 111 of the volute 11 have the above relative positional relationship, and the smoke inlet cover 2 is located between the fan box 1 and the volute 11, the smoke inlet cover 2 can be used to smoothly transition the flue gas flowing from the flue pipe 3 to the air inlet 111 of the volute 11, thereby reducing the possibility of the airflow directly impacting the inner wall of the volute 11 or forming a vortex near the air inlet 111. In short, when the smoke inlet cover 2 and the air inlet 111 of the volute 11 have the above relative positional relationship, the airflow can enter the fan more smoothly, thereby improving the air intake efficiency of the fan and further improving the performance of the entire system.

[0149] In one embodiment, the smoke inlet cover 2 covers at least part of the air inlet 111 of the volute 11 of the fan.

[0150] For the above-mentioned vertically installed fan, the fan has a volute 11, and the volute 11 is provided with an air inlet 111 which is arranged along the height direction Z. The air inlet 111 can be arranged at the middle of the volute 11. The air inlet 111 has opposite highest and lowest positions. The highest position (the uppermost end) of the smoke inlet cover 2 can be located above the lowest position of the air inlet 111, thereby covering at least part of the air inlet 111 of the volute 11 of the fan.

[0151] Therefore, the height of the fan box 1 can be further reduced, and the cost of the range hood can be further reduced. In particular, when the range hood 2 is made of plastic and the fan box 1 is made of metal, the cost of the range hood can be significantly reduced.

[0152] Specifically, the projection of the smoke inlet cover 2 on the inlet 111 of the fan's volute 11 has an overlapping area with the inlet 111 of the fan's volute 11, which is greater than, equal to, or less than 1 / 2 of the area of the inlet 111 of the fan's volute 11.

[0153] For example, the projection of the smoke inlet cover 2 on the inlet 111 of the fan's volute 11 has an overlapping area with the inlet 111 of the fan's volute 11, which is close to or equal to 1 / 2 of the area of the inlet 111 of the fan's volute 11.

[0154] In this way, when the smoke inlet cover 2 is arranged outside the fan box 1, a certain height overlapping part is formed between the outside of the fan box 1 and the inside of the smoke inlet cover 2. When the oil in the inner surface of the fan box 1 seeps outwards, it needs to pass through the above-mentioned overlapping part to seep out, that is, the smoke inlet cover 2 cooperates with the fan box 1 to prolong the flow path of the oil seepage, thereby reducing the risk of oil seepage.

[0155] In other embodiments, the center line of the impeller of the fan is parallel to the wall surface, or the included angle between the center line of the impeller of the fan and the wall surface is greater than 0° and less than 45°.

[0156] In the present embodiment, the center line of the impeller of the fan is parallel to the vertical wall surface, or the included angle between the center line of the impeller of the fan and the vertical wall surface is greater than 0° and less than 45°, which means that the fan is installed in a horizontal manner. When the fan is installed in a horizontal manner, the center line of the impeller can be arranged vertically or inclined at a small angle relative to the vertical direction. When the center line of the impeller is inclined at a small angle relative to the vertical direction, the included angle between the center line of the impeller and the vertical direction is within 45°.

[0157] In one embodiment, the projection of the smoke inlet cover 2 on the volute 11 of the fan is at least above the inlet 111 of the volute 11 of the fan.

[0158] In this embodiment, the fan is horizontally mounted, and the volute 11 includes at least one air inlet 111 at the bottom. In the height direction Z, the highest point of the fume hood 2 is higher than the air inlet 111 of the volute 11. Since the fume hood 2 covers the air inlet 111 of the volute 11, the height of the fan housing 1 can be reduced, thereby lowering the cost of the range hood. This is especially true when the fume hood 2 is made of relatively low-cost plastic, while the fan housing 1 is made of a material with higher cost, such as sheet metal, significantly reducing the cost of the range hood. Furthermore, by providing the fume hood 2 around the air inlet 111, noise generated during fan operation can be blocked, thereby improving the noise reduction performance of the range hood.

[0159] Furthermore, the projection of the smoke inlet hood 2 toward the volute 11 of the fan coincides at least with the impeller of the fan.

[0160] Thus, since the fume hood 2 covers at least part of the fan impeller, which is located above the air inlet 111, it effectively extends the highest point of the fume hood 2 upwards. This allows for a further reduction in the height of the fan housing 1, thereby further lowering the cost of the range hood. In particular, when the fume hood 2 is made of relatively low-cost plastic, while the fan housing 1 is made of a higher-cost material, such as sheet metal, the cost of the range hood can be significantly reduced.

[0161] like Figure 11 and Figure 12 As shown, in some embodiments, the lower part of the volute 11 of the fan protrudes from the fan housing 1 in the height direction Z.

[0162] In this embodiment, because the fan housing 1 has a smoke inlet hood 2 at its lower part, the height of the fan housing 1 can be reduced. When the height of the fan housing 1 is reduced to a certain extent, the lower part of the fan casing 11 protrudes from the fan housing 1. Reducing the height of the fan housing 1 helps to lower its manufacturing cost. In particular, when the smoke inlet hood 2 is made of relatively low-cost plastic, while the fan housing 1 is made of a material with higher material cost than plastic, such as sheet metal, the cost of the range hood can be significantly reduced.

[0163] In one embodiment, the height difference between the lowest position of the lower part of the volute 11 and the lowest position of the fan box 1 is more than 15 mm and / or less than 220 mm.

[0164] In the embodiment, the fan case 1 is internally provided with a fan. The fan case 1 needs to be provided with an air outlet 102 for guiding the flue gas in the outlet of the volute 11 of the fan, and the air outlet 102 is provided with a smoke outlet seat 5. The diameter of the smoke outlet seat 5 is D1, for example, D1 is 160 mm. For the vertically installed fan, the height dimension of the volute 11 is generally D2. The height of the fan case 1 is at least greater than the height of the outlet of the volute 11, and the maximum value of the lower part of the volute 11 protruding out of the fan case 1 is generally the difference between D2 and D1. When the height of the volute 11 is 380 mm, the maximum value of the lower part of the volute 11 protruding out of the fan case 1 is 220 mm.

[0165] In addition, since the smoke inlet hood 2 is arranged at the air inlet 111 of the fan case 1, the smoke inlet hood 2 can act as part of the fan case 1, so that the height dimension of the fan case 1 can be reduced compared to the original height. For example, the lower part of the volute 11 can be located above the lowest position of the fan case 1 by 15 mm, so as to ensure that the height of the fan case 1 is reduced. Of course, with the gradual reduction of the height of the fan case 1, the lower part of the volute 11 will protrude out of the fan case 1 until the above-mentioned limit position, that is, the lower part of the volute 11 protrudes out of the fan case 1 by about 220 mm.

[0166] Of course, in the embodiment, the above-mentioned numerical values are mainly exemplified by taking the dimensions of the fan which is currently more popular as an example. When the dimensions of the fan case 1 and the fan volute 11 change, the above-mentioned boundary values can also be adaptively adjusted.

[0167] In one embodiment, the ratio of the height difference between the lowest position of the lower part of the volute 11 and the lowest position of the fan case 1 to the total height of the volute 11 is greater than or equal to 4% and / or less than or equal to 60%.

[0168] Similar to the above-mentioned embodiment, taking the total height of the volute 11 as 380 mm as an example, when the height difference between the lowest position of the lower part of the volute 11 and the lowest position of the fan case 1 is greater than or equal to 15 mm and / or less than or equal to 220 mm, the ratio of the height difference between the lowest position of the lower part of the volute 11 and the lowest position of the fan case 1 to the total height of the volute 11 is greater than or equal to 4% and / or less than or equal to 60%.

[0169] In one embodiment, the height dimension of one of the front side plate 131, the rear side plate 132, the left side plate 133 and the right side plate 134 of the fan case 1 is not greater than 385 mm.

[0170] In the embodiment, the cross section of the fan box 1 can be rectangular or quasi-rectangular, and the fan box 1 has opposite front and back side plates 131 and 132, and opposite left and right side plates 133 and 134. For a conventional fan box 1, the height dimension is about 400 mm, and in the embodiment, the height of the fan box 1 can be reduced by at least 15 mm, so that the height dimension of the front, back, left and right side plates 131, 132, 133 and 134 is not greater than 385 mm.

[0171] For the case that the lower part of the volute 11 of the fan protrudes out of the fan box 1, the lowest position of the fan box 1 relative to the air inlet 111 of the volute 11 of the fan includes various possible cases. Specifically, the lowest position of the fan box 1 is above, close to or below the lowest position of the air inlet 111 of the volute 11 of the fan in the height direction Z.

[0172] For the case that the lowest position of the fan box 1 is close to or flush with or below the lowest position of the air inlet 111 of the volute 11 of the fan in the height direction Z, a noise reduction structure is further provided on the inner surface of the fan box 1, and the noise reduction structure is arranged opposite to the air inlet 111 of the volute 11 of the fan.

[0173] In the embodiment, when the lowest position of the fan box 1 is close to or below the lowest position of the air inlet 111 of the volute 11 of the fan in the height direction Z, in order to reduce the noise that can be transmitted outward at the air inlet 111 of the fan, a noise reduction structure can be arranged on the inner surface of the fan box 1 opposite to the air inlet 111.

[0174] As shown in FIG. 7, specifically, the noise reduction structure can include a noise reduction layer and a fixing mechanism 65 for fixing the noise reduction layer on the inner surface of the fan box 1. Figure 6

[0175] In the embodiment, the specific form of the noise reduction structure can be selected according to the requirements of the actual application scene. For example, the noise reduction structure can include a noise reduction layer and a fixing mechanism 65 for fixing the noise reduction layer. The fixing mechanism can cooperate with the inner surface of the fan box 1, so as to reliably install the noise reduction layer on the inner surface of the fan box 1. Specifically, the noise reduction layer can include any one or a combination of the following: an acoustic absorption material layer, an acoustic insulation material layer, a damping material layer, etc.

[0176] ​To maximize the noise reduction effect of the noise reduction layer, the fixing mechanism 65 has a non-microporous perforated structure on its surface. Compared to a microporous fixing mechanism, 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, as long as it ensures stable fixing of the noise reduction structure and allows for sufficient contact between the fan noise and the noise reduction structure. The fixing mechanism 65 can be integrally formed on the inner surface of the fan housing 1 or fixed to the inner surface of the fan housing 1 by installation. Alternatively, in some special cases, such as when the noise reduction structure itself is adhesive, the fixing mechanism can be omitted.

[0177] Furthermore, in some other embodiments of this application, in the height direction Z, the bottom of the fan housing 1 is lower than the bottom of the fan volute 11, or the bottom of the fan housing 1 is flush with the bottom of the fan volute 11.

[0178] In the embodiment where the bottom of the fan housing 1 is slightly lower than or flush with the bottom of the fan volute 11, its cooperation with the smoke inlet hood 2 can, to some extent, reduce the height of the side panel of the fan housing 1. Reducing the height of the fan housing 1 also helps to lower its manufacturing cost. In particular, when the smoke inlet hood 2 is made of relatively inexpensive plastic, while the fan housing 1 is made of a material with higher cost, such as sheet metal, the cost of the range hood can be significantly reduced.

[0179] Please refer to the following: Figures 11 to 12 In some embodiments, the range hood may further include a smoke outlet seat 5, which is used for installation above the ceiling 6; the fan box 1 includes a first side plate and a second side plate disposed opposite to each other, the first side plate (with... Figure 5 Taking the right side plate 134 shown as an example, the upper part has a fan box 1 outlet; the mounting part of the smoke outlet seat 5 is located on the inner side of the upper part of the first side plate or the mounting part of the smoke outlet seat 5 is located on the outer side of the upper part of the first side plate; the smoke outlet of the fan volute 11 is connected to the smoke outlet seat 5; the upper part of the first side plate is inclined from bottom to top toward 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.

[0180] In this embodiment, the range hood may also be equipped with a smoke outlet seat 5, which is located at the outlet of the fan box 1 and is used to connect the outlet of the fan box 1 to the exhaust pipe. In an installation environment with a suspended ceiling 6, the smoke outlet seat 5 is installed above the suspended ceiling 6.

[0181] The fan box 1 can include a first side plate and a second side plate arranged oppositely. The first side plate and the second side plate can be opposite right side plate 134 and left side plate 133. Wherein, the upper part of one of the first side plate and the second side plate can be provided with a fan box 1 outlet. The smoke outlet of the volute 11 of the fan is communicated with the smoke outlet seat 5, and when the fan is started, the smoke generated during cooking can flow through the smoke outlet seat 5 under the suction of the fan through the smoke outlet of the volute 11.

[0182] Taking the upper part of the first side plate as an example, the smoke outlet seat 5 is also arranged on the upper part of the first side plate because the smoke outlet seat 5 is arranged corresponding to the outlet of the fan box 1. Specifically, the smoke outlet seat 5 has a mounting portion for cooperating with the first side plate, which can be located on the inner side or the outer side of the upper part of the first side plate.

[0183] Wherein, the specific form of the mounting portion can be a flange ring with an outer contour matched with the structure of the fan box 1 outlet. When the outlet of the fan box 1 is a rectangular hole, the structure of the flange ring can be rectangular; when the outlet of the fan box 1 is a circular hole, the structure of the flange ring can be circular. When the outlet of the fan box 1 is of other structures, the structure of the flange ring can be synchronously adapted. Specifically, the specific structure of the mounting portion is not uniquely limited herein.

[0184] In order to realize the fixed connection between the smoke outlet seat 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 seat 5 and the fan box 1 can be realized by setting fasteners in the fastening holes.

[0185] In the embodiment, the upper part of the first side plate provided with the fan box 1 outlet is inclined from bottom to top to the second side plate, and the upper part of the first side plate has a non-zero included angle with the lower part of the first side plate. By such arrangement, when it is desired to install the fan box 1 above the suspended ceiling 6, because the smoke outlet seat 5 is also inclined with the upper part of the first side plate, the overall transverse size of the fan box 1 and the smoke outlet seat 5 is smaller, which can reduce the opening size of the suspended ceiling 6, and in addition, it is also beneficial to reduce the height occupied by the smoke outlet seat 5, so as to fully utilize the limited height space above the suspended ceiling 6. Even when the height between the suspended ceiling 6 and the top wall 7 is limited, the smoke outlet seat 5 can be smoothly installed above the suspended ceiling 6.

[0186] In one embodiment, the fan box 1 is installed on the top wall 7 or arranged close to the top wall 7.

[0187] In the embodiment, the fan case 1 is specifically mounted on the top wall 7, that is, the top of the fan case 1 is fixed on the top wall 7, or the fan case 1 is arranged close to the top wall 7, that is, the top of the fan case 1 is within a small distance range from the top wall 7. When the fan case 1 is directly mounted on the top wall 7 or arranged close to the top wall 7, it is beneficial to realize the split mounting of the range hood, and the height requirement of the suspended ceiling 6 is relatively low, so that the noise source is as far away from the user as possible.

[0188] As shown in Figure 12 Specifically, the height difference between the top of the fan case 1 and the top wall 7 is not greater than 90 mm.

[0189] For a general kitchen environment provided with a suspended ceiling 6, the height of the suspended ceiling 6 (that is, the distance from the suspended ceiling 6 to the top wall 7) is usually about 250 mm. The smoke outlet seat 5 of the fan case 1 and the smoke exhaust pipe connected with the smoke outlet seat 5 are usually located on the suspended ceiling 6. Among them, the diameter of the smoke exhaust pipe is usually between 160 mm and 180 mm.

[0190] In the embodiment, the height difference H2 between the top of the fan case 1 and the top wall 7 can be controlled within 90 mm. Thus, in the case of a suspended ceiling 6 with a height of 250 mm, the largest smoke exhaust pipe of the existing specification can be installed in the suspended ceiling 6.

[0191] It should be noted that the height difference H2 between the top of the fan case 1 and the top wall 7 is mainly determined based on the difference between the height of the suspended ceiling 6 and the diameter of the largest smoke exhaust pipe. The above data defined in the embodiment of the application can be adapted to the height of the suspended ceiling 6 and the size of the smoke exhaust pipe which are currently more common.

[0192] For the fan case 1, when it is mounted on the top wall 7 or arranged close to the top wall 7, the installation state of the smoke outlet seat 5 mounted on the fan case 1 can include various, specifically, the smoke outlet seat 5 extends downwardly as a whole in the direction away from the fan case 1, or the smoke outlet seat 5 extends horizontally as a whole in the direction away from the fan case 1, or the smoke outlet seat 5 extends upwardly as a whole in the direction away from the fan case 1 and the highest point of the smoke outlet seat 5 is not higher than the top of the fan case 1, or the smoke outlet seat 5 extends upwardly as a whole in the direction away from the fan case 1 and the height difference between the highest point of the smoke outlet seat 5 and the top of the fan case 1 is not greater than the height difference H2 between the top wall 7 and the top of the fan case 1.

[0193] Overall, for the fan case 1 provided with the smoke outlet seat 5, when the fan case 1 is mounted on the top wall 7 or arranged close to the top wall 7, at least the noise source can be arranged away from the human ear, so that the split range hood can have a better noise reduction effect.

[0194] Specifically, for the smoke outlet 5, when it is arranged in different mounting states, it has different technical effects.

[0195] When the smoke outlet 5 extends horizontally or extends downwardly 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 5 can make the smoke exhaust pipe connected thereto avoid the beam. Alternatively, for example, it is possible that the opening position of the user's public flue is low, and when the smoke outlet 5 is arranged downwardly, the smoke exhaust pipe connected to the smoke outlet 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 has a downwardly inclined flow trend as a whole due to the influence of the structure of the volute 11 itself and the inertial force. When the smoke outlet 5 extends downwardly as a whole, the smoke flowing out of the fan can be discharged through the smoke outlet 5 with lower resistance, greater air volume, and smaller noise.

[0196] When the smoke outlet 5 extends horizontally or extends downwardly in the direction away from the fan box 1, the smoke flowing out of the fan can be discharged through the smoke outlet 5 with lower resistance, greater air volume, and smaller noise. In addition, when the smoke outlet 5 extends horizontally as a whole, the height of the installation space required when the smoke outlet 5 is matched with the smoke exhaust pipe is the lowest.

[0197] When the smoke outlet 5 extends upwardly in the direction away from the fan box 1 as a whole, the noise generated by the airflow can be further away from the human ear by utilizing the ceiling 6 space, 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 5 extends upwardly, the smoke exhaust pipe connected to the smoke outlet 5 can be conveniently connected to the opening of the public flue.

[0198] For the case that the smoke outlet 5 extends upwardly as a whole, in order to prevent the highest position of the smoke outlet 5 from interfering with the top wall 7, the highest point of the smoke outlet 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 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 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.

[0199] In one embodiment, the smoke outlet 5 extends horizontally in the direction away from the fan box 1 as a whole, the smoke outlet 5 has a smoke inlet end and a smoke outlet end, the smoke outlet end is arranged vertically or inclinedly as a whole, and the smoke inlet end is arranged inclinedly from bottom to top in the direction away from the smoke outlet end.

[0200] In this embodiment, the smoke outlet seat 5 can extend horizontally as a whole. Specifically, the smoke outlet seat 5 can include a tubular body with a centerline that extends horizontally. The smoke outlet seat 5 also includes a flue gas inlet end and a flue gas outlet end. The flue gas inlet end is used to connect to the fan box 1, and the flue gas outlet end is used to connect to the exhaust pipe. The specific structure of the flue gas outlet end can be adapted to the structure of the connecting end of the exhaust pipe to which it is assembled. For example, the flue gas outlet end can be vertically or inclined.

[0201] The specific structure of the flue gas inlet end 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 of the fan box 1 used to set the smoke outlet seat 5 is inclined from bottom to top toward the second side plate, that is, when the upper part of the first side plate and the lower part of the first side plate have a non-zero angle, the flue gas inlet end is also inclined, and the plane where the flue gas inlet end is located is parallel to the first side plate.

[0202] like Figure 10 As shown, the top tangent of the 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 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.

[0203] 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 smoke inlet end and a smoke outlet end. The smoke outlet end is vertically or inclined. The smoke inlet end is inclined from bottom to top in a direction away from the smoke outlet end.

[0204] 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.

[0205] For the smoke outlet seat 5, when it is extended as a whole upwardly, the space of the ceiling 6 can be further utilized, so that the noise generated by the airflow flow is far away from the human ear, and the noise reduction performance of the range hood is improved. In an embodiment, the smoke outlet seat 5 is extended downwardly as a whole in a direction away from the fan box 1, the smoke outlet seat 5 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 a direction away from the flue gas outlet end.

[0206] In the embodiment, the main difference from the above-mentioned embodiment is that the smoke outlet seat 5 is extended downwardly as a whole. For the smoke outlet seat 5 and the smoke exhaust pipe, some interference problems (for example, the top wall 7 is provided with a cross beam, etc.) may be encountered during installation, or the opening position of the public flue for passing the smoke exhaust pipe is low, at this time, the smoke outlet seat 5 may need to be extended downwardly as a whole to overcome the above-mentioned interference problems and / or installation docking problems.

[0207] For the fan, the flue gas flowing out of the outlet of the volute 11 has a downwardly inclined flow trend as a whole due to the influence of the structure of the volute 11 itself and the inertial force. When the smoke outlet seat 5 is extended downwardly 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 lower resistance, larger air volume and smaller noise, and then be discharged outwardly.

[0208] In an embodiment, the plane where the mounting portion of the smoke outlet seat 5 is located is parallel to the plane where the outlet of the fan box 1 of the upper portion of the first side plate is located.

[0209] Specifically, the smoke outlet seat 5 has a mounting portion for cooperating with the first side plate, which can be located on the inner side or the outer side of the upper portion of the first side plate. The specific form of the mounting portion can be referred to the specific description of the above-mentioned embodiment, which will not be described herein. The plane where the mounting portion is located can be arranged in parallel to the plane where the outlet of the fan box 1 is located, so as to ensure that the smoke outlet seat 5 can be compactly docked with the fan box 1, which is beneficial for the flue gas to flow without disturbance at the docking position of the two.

[0210] 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 is consistent with the inclination direction of the plane where the outlet of the volute 11 is located, and the air outlet 102 arranged on the first side plate is arranged towards the uppermost of the fan box 1, which is beneficial for reducing the height dimension required by the fan box 1 between the ceiling 6 and the top wall 7, so as to improve the universality of the installation of the range hood.

[0211] As Figure 5As shown, in one embodiment, the angle Q 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°.

[0212] In the present embodiment, the upper portion of the first side plate is arranged in an inclined manner, specifically, the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be within 14.9°; or the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be between 15.1° and 75°; or the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be equal to 15°.

[0213] When setting the inclination angle of the upper portion of the first side plate, various factors such as the performance of the fan and the adaptability of the installation need to be considered comprehensively.

[0214] 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 of the fan box 1, and then the whole is installed into the ceiling 6 through the opening of the ceiling 6.

[0215] In theory, the greater the inclination angle of the upper portion of the first side plate, 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 beneficial to reducing the installation size of the fan box assembly in the horizontal direction, that is, it is beneficial to the upper portion of the fan box 1 to pass through the opening in the ceiling 6 and be installed on the ceiling 6. At this time, the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be greater than 15.1° and less than or equal to 75°.

[0216] Generally, for a range hood, the exhaust pipe needs to extend along the horizontal direction at least at the end to be connected to the opening of the public flue. For a range hood, the smoke gas at the air outlet 102 of the volute 11 of the fan is affected by the inertial force and flows downwardly and obliquely.

[0217] The greater the inclination angle of the upper portion of the first side plate, the greater the angle between the inertial force of the smoke gas at the air outlet 102 of the volute 11 of the fan and the horizontal direction, and the greater the pressure loss generated when the smoke gas changes from the air outlet 102 to the horizontal direction and is discharged to the exhaust pipe.

[0218] In order to minimize the pressure loss of the smoke gas discharged from the air outlet 102 of the volute 11 of the fan, the inclination angle of the upper portion of the first side plate can be appropriately reduced. For example, the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be within 14.9° or equal to 15°.

[0219] In addition, when the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction is within 14.9° or equal to 15°, the size of the smoke outlet 5 in the height direction can be reduced relative to the axial length of the smoke outlet 5 after the smoke outlet 5 is installed on the first side plate, so that the installation height of the fan box 1 can be controlled within a reasonable range, and the smoke outlet 5 can improve the installation adaptability above the ceiling 6 by using the small size in the height direction.

[0220] In other embodiments, a transition piece can be further arranged between the outlet of the fan scroll 11 and the upper portion of the first side plate to connect and transition. Overall, the inclination angle of the first side plate can be adapted to the working condition of the installation thereof in combination with the fan performance and the installation adaptability.

[0221] In addition, considering that the exhaust duct generally needs to be connected to the side wall, the angle Q between the plane where the upper portion of the first side plate 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 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.

[0222] Preferably, the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction can be within 45°. When the size of the top plate 135 of the fan box 1 is unchanged, if the angle Q between the plane where the upper portion of the first side plate is located and the vertical direction is large, for example, greater than 45°, and the axis direction of the smoke outlet 5 is perpendicular to the first side plate, the opening of the smoke outlet 5 as a whole tends to be directed toward 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 5 and the user's public flue, which is not convenient for the smoke outlet 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 is located and the vertical direction is too large, the size of the smoke outlet 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 small, interference between the smoke outlet 5 and the top wall 7 can occur. In an embodiment, the length of the upper portion of the first side plate accounts for more than or equal to a preset proportion of the total length of the first side plate, and the preset proportion is not less than 40% to 90%.

[0223] In the embodiment, the first side plate can include an upper portion arranged in an inclination and a lower portion extending vertically. The upper portion of the first side plate is mainly used for opening the air outlet 102, installing the smoke outlet 5, and can be used for directly connecting the outlet of the fan scroll 11. The first side plate cooperates with other side plates to install the main body portion of the fan scroll 11.

[0224] For the upper part of the first side plate, which serves as the base for the installation of the smoke outlet 5, the length dimension of the upper part of the first side plate can be matched with the diameter dimension of the smoke outlet 5. For example, when the diameter dimension of the smoke outlet 5 is 160 mm, the length dimension of the upper part of the first side plate can be slightly greater than 160 mm; for example, when the diameter dimension of the smoke outlet 5 is 180 mm, the length dimension of the upper part of the first side plate can be slightly greater than 180 mm.

[0225] For the implementation in which the smoke inlet cover 2 and the fan box 1 partially overlap inside and outside, the lower part of the first side plate has at least a mounting height for coinciding with the smoke inlet cover 2, so as to set the connecting structure. For example, the mounting height is at least 10 mm.

[0226] The maximum value of the preset proportion of the length of the upper part of the first side plate to the total length of the first side edge can be the ratio of the diameter dimension of the smoke outlet 5 to (the diameter dimension of the smoke outlet 5 + the mounting height of the lower part of the first side plate). The maximum value of the preset proportion can be more than 90%.

[0227] For the implementation in which the size of the fan volute 11 needs to at least partially protrude from the fan box 1, if the height of the fan volute 11 is 380 mm, the minimum value of the preset proportion of the length of the upper part of the first side plate to the total length of the first side edge can be the ratio of the diameter dimension of the smoke outlet 5 to the height of the fan volute 11. The minimum value of the preset proportion can be more than 40%.

[0228] Overall, considering that when the lower part of the first side plate of the fan box 1 is small in size, 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 proportion should not be too large, for example, within 1 / 2.

[0229] In one implementation, the height of the upper part of the first side plate in the vertical direction is less than or equal to 300 mm.

[0230] In the present implementation, the upper part of the first side plate is used as the mounting base of the smoke outlet 5, in order to set the smoke outlet 5 and the smoke exhaust pipe connected with the smoke outlet 5 above the ceiling 6, the height of the upper part of the first side plate in the vertical direction can be controlled according to the height of the ceiling 6. Specifically, the height of the upper part of the first side plate 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 part of the first side plate in the vertical direction is within 250 mm.

[0231] When the height of the upper part of the first side plate 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, no matter how it is installed, can be located above the ceiling 6 when matched with the first side plate.

[0232] In addition, when the first side plate is arranged in an inclined manner, a right-angled space is formed corresponding to the part arranged in an inclined manner. In the present application, the smoke outlet seat 5 is installed by using the right-angled space, and the height dimension of the upper part of the first side plate is reasonably controlled based on the size of the smoke outlet seat 5, which is also conducive to controlling the size of the opening required when the fan box 1 is installed in the ceiling 6, that is, the size of the opening can be ensured to be as small as possible, and the overall structure is reasonably compact.

[0233] In an embodiment, the extractor hood can further include a decorative cover 8, and the largest cross section of the smoke inlet cover 2 is projected downwardly to fall within the outlet of the smoke collecting cavity 4, so that the decorative cover 8 can cover the air outlet 102 of the smoke collecting cavity 4 and the smoke inlet cover 2.

[0234] In some installation scenarios, considering that the smoke pipe 3, the smoke inlet cover 2 and the like above the smoke collecting cavity 4 of the extractor hood can not be hiddenly installed by corresponding cabinets, in order to ensure the overall aesthetics of the extractor hood, the extractor hood can further include a decorative cover 8. The cross-sectional area of the decorative cover 8 can be a constant value, for example, the cross-sectional area of the decorative cover 8 can be close to (slightly larger than) the area of the largest cross section of the smoke inlet cover 2. Of course, in the embodiments of the present application, the decorative cover 8 can also be in the form of a variable cross section.

[0235] One end of the decorative cover 8 can be connected at the air outlet 102 of the smoke collecting cavity 4, and the other end can be located at the largest cross section of the smoke inlet cover 2. When the decorative cover 8 is a constant value, since the largest cross section of the smoke inlet cover 2 can be smaller than or equal to the cross section where the outlet of the smoke collecting cavity 4 is located, the decorative cover 8 with a constant cross section can be pulled up from the outlet of the smoke collecting cavity 4 to cover the periphery of the smoke pipe 3 and the smoke inlet cover 2.

[0236] In order to ensure that the fan box 1 can be installed in the cabinet of a conventional user's home, 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 111 of the fan scroll 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 scroll 11, the length dimension is greater than the width dimension. When the air inlet 111 of the fan scroll 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 111 of the fan scroll 11 is mainly arranged toward the front-rear side.

[0237] Please refer to Figure 6 and Figure 8In one embodiment, the front side plate 131 of the fan box 1 is asymmetrically provided with a plurality of first mounting holes, the rear side plate 132 of the fan box 1 is asymmetrically provided with a plurality of second mounting holes, the plurality of first mounting holes coincide with the plurality of second mounting holes after rotating 180° around the vertical center line, and the first mounting holes and the second mounting holes are used for connecting the smoke inlet cover 2; and / or the left side plate 133 of the fan box 1 is asymmetrically provided with a plurality of third mounting holes 601, the right side plate 134 of the fan box 1 is asymmetrically provided with a plurality of fourth mounting holes 602, the plurality of third mounting holes 601 coincide with the plurality of fourth mounting holes 602 after rotating 180° around the vertical center line, and the third mounting holes 601 and the fourth mounting holes 602 are used for connecting the smoke inlet cover 2.

[0238] In the present embodiment, the fan box 1 has opposite front side plates 131 and rear side plates 132, and opposite left side plates 133 and right side plates 134. Taking the left side plate 133 and the right side plate 134 of the fan box 1 as an example, if the left side plate 133 of the fan box 1 is rotated 180° around the vertical center line of the fan box 1, the third mounting holes 601 on the left side plate 133 can coincide with the fourth mounting holes 602 on the right side plate 134, so that when the smoke inlet cover 2 is docked with the fan box 1, the left cover wall 203 and the right cover wall 204 of the smoke inlet cover 2 can be interchangeably mounted with the left side plate 133 and the right side plate 134 of the fan box 1. When installing, the installer does not need to deliberately correspond the left side plate 133 and the right side plate 134 of the fan box 1 with the left cover wall and the right cover wall of the smoke inlet cover 2 one by one. The left side plate 133 of the fan box 1 can correspond to the left cover wall 203 of the smoke inlet cover 2, or can correspond to the right cover wall 204 of the smoke inlet cover 2. Such an arrangement can reduce the requirements and difficulty of assembling the fan box 1 and the smoke inlet cover 2, improve the assembly efficiency, and prevent mistakes by using the above asymmetrically arranged holes. In addition, the asymmetrically arranged holes are simple in process and have relatively low requirements on the hole spacing.

[0239] It should be noted that in the description of the present application, the terms “first”, “second” and the like 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 “a plurality of” is two or more.

[0240] The above various embodiments in the specification are described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0241] The above are only several embodiments of the present application, although the embodiments disclosed by the present application are as above, the content is only the adopted embodiments for facilitating the understanding of the present application, and is not used for limiting 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 embodiments without departing from the spirit and scope of the present application, but the patent protection scope of the present application still needs to be limited by the scope defined by the appended claims.

Claims

1. A split range hood, characterized in that, the split range hood comprises a fan case, an inlet hood, a smoke duct and a smoke collecting cavity, and the fan case, the inlet hood, the smoke duct and the smoke collecting cavity are sequentially connected from top to bottom near a side wall; the fan case has a fan therein, and the fan is arranged at least partially above a ceiling; the inlet hood is sealingly connected to the fan case, and at least part of the inlet hood shields at least part of the fan; an air inlet channel is formed in the inlet hood, and smoke in the smoke duct can flow into the fan case through the air inlet channel; a lower part of the inlet hood is inserted into an upper part of the smoke duct, and an outer surface of the lower part of the inlet hood is sealingly connected to an inner surface of the upper part of the smoke duct in a non-detachable fixed manner or in a detachable manner, or an upper part of the smoke duct is inserted into a lower part of the inlet hood, and an inner surface of the lower part of the inlet hood is sealingly connected to an outer surface of the upper part of the smoke duct in a non-detachable fixed manner or in a detachable manner, or the lower part of the inlet hood is integrally formed with the upper part of the smoke duct, or the lower part of the inlet hood is opposite to the upper part of the smoke duct.

2. The split range hood according to claim 1, characterized in that the inlet hood comprises a front hood wall, and the front hood wall shields and is sealingly connected to a front side plate of the fan case; 3. The split range hood according to claim 2, characterized in that the inlet hood further comprises a left hood wall and a right hood wall, the left hood wall shields and is sealingly connected to a left side plate of the fan case, and the right hood wall shields and is sealingly connected to a right side plate of the fan case; 4. The split range hood according to claim 3, characterized in that the inlet hood further comprises a rear hood wall, and the rear hood wall shields and is sealingly connected to a rear side plate of the fan case; 5. The split range hood as claimed in claim 1, wherein, a center line of a fan wheel of the fan is perpendicular to a vertical wall surface, or an included angle between the center line of the fan wheel of the fan and the vertical wall surface is greater than or equal to 45° and less than 90°.

6. The split range hood according to claim 5, characterized in that the inlet hood at least covers at least part of an area of the fan below an air inlet of a volute of the fan; 7. The split range hood according to claim 6, characterized in that a highest position of a projection of the inlet hood towards the volute of the fan is close to or located at a lower edge of the air inlet of the volute; 8. The split range hood according to claim 5, characterized in that the inlet hood at least covers at least part of the air inlet of the volute of the fan; 9. The split range hood according to claim 8, characterized in that an overlapping area of a projection of the inlet hood towards the air inlet of the volute of the fan and the air inlet of the volute is greater than, equal to or less than 1 / 2 of an area of the air inlet of the volute; 10. The split range hood as claimed in claim 1, wherein, the center line of the fan wheel of the fan is parallel to a wall surface, or an included angle between the center line of the fan wheel of the fan and the wall surface is greater than 0° and less than 45°; 11. The split range hood according to claim 10, characterized in that the projection of the inlet hood towards the volute of the fan is at least above the air inlet of the volute of the fan; 12. The split range hood according to claim 11, characterized in that the projection of the inlet hood towards the volute of the fan at least coincides with the fan wheel of the fan; 13. The split range hood as claimed in claim 1, wherein, in a height direction, a lower part of the volute of the fan protrudes from the fan case; 14. The split range hood according to claim 13, characterized in that a height difference between a lowest position of the lower part of the volute and a lowest position of the fan case is greater than or equal to 15 mm and / or less than or equal to 220 mm; 15. The split range hood as claimed in claim 13, wherein, a ratio of the height difference between the lowest position of the lower part of the volute and the lowest position of the fan case to a total height of the volute is greater than or equal to 4% and / or less than or equal to 60%.

16. The split range hood as claimed in claim 13, wherein The height dimension of one of the front side plate, the rear side plate, the left side plate and the right side plate of the fan box is not greater than 385 mm.

17. The split range hood as claimed in claim 13, wherein, The lowest position of the fan box is above, near or flush with, or below the lowest position of the air inlet of the volute of the fan in the height direction.

18. The split range hood according to claim 17, characterized in that The lowest position of the fan box is near or flush with, or below the lowest position of the air inlet of the volute of the fan in the height direction, and a noise reduction structure is further arranged on the inner surface of the fan box, and the noise reduction structure is arranged opposite to the air inlet of the volute of the fan.

19. The split range hood according to claim 18, characterized in that 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, and the surface of the fixing mechanism is provided with a non-microporous hollow structure.

20. The split range hood as claimed in claim 1, wherein, In the height direction, the bottom of the fan box is lower than or flush with the bottom of the volute of the fan.

21. The split range hood as claimed in claim 1, wherein, The smoke inlet cover further comprises an enlarged portion, and the enlarged portion is located downstream of the lower portion of the smoke inlet cover in the direction of the flue gas flow.

22. The split range hood according to claim 21, characterized in that The enlarged portion and the lower portion of the smoke inlet cover further have a connecting portion therebetween, and the connecting portion comprises a platform portion or a gradually expanding portion.

23. The split range hood according to claim 22, characterized in that The upper end of the lower portion of the smoke inlet cover extends outwardly to form the platform portion, and the outer edge of the platform portion extends upwardly after being folded to form the enlarged portion, or the upper end of the lower portion of the smoke inlet cover extends outwardly and upwardly to form the gradually expanding portion, and the outer edge of the gradually expanding portion extends upwardly after being folded to form the enlarged portion.

24. The split range hood according to claim 22, characterized in that At least part of the enlarged portion shields at least part of the fan.

25. The split range hood according to claim 22, characterized in that The connection between the enlarged portion and the connecting portion has a guide angle, and the guide angle is located below the side of the air inlet of the volute of the fan.

26. The split range hood according to claim 1, characterized in that The smoke inlet cover is a plastic smoke inlet cover or a metal smoke inlet cover.

27. The split range hood according to claim 1, characterized in that The split range hood further comprises a decorative cover, and the maximum cross section of the smoke inlet cover is projected downwardly into the outlet of the smoke collecting cavity, so that the decorative cover can cover the air outlet of the smoke collecting cavity and the smoke inlet cover.

28. The split range hood according to claim 1, wherein The split range hood further comprises a smoke outlet seat, and the smoke outlet seat is used for being mounted above the ceiling; The fan box comprises oppositely arranged first and second side plates, and the upper portion of the first side plate has a fan box outlet; The mounting portion of the smoke outlet seat is located on the inner side of the upper portion of the first side plate, or the mounting portion of the smoke outlet seat is located on the outer side of the upper portion of the first side plate; The smoke outlet of the volute of the fan is in communication with the smoke outlet seat; The upper portion of the first side plate is inclined to the second side plate from bottom to top, and the upper portion of the first side plate has a non-zero included angle with the lower portion of the first side plate.

29. The split range hood according to claim 28, characterized in that The fan box is mounted on or arranged close to the top wall.

30. The split range hood according to claim 29, characterized in that The height difference between the top of the fan box and the top wall is not greater than 90 mm.

31. The split range hood according to claim 29, wherein The smoke outlet seat is integrally inclined downwardly in the direction away from the fan box, or the smoke outlet base extends horizontally as a whole in a direction away from the fan box, or the smoke outlet base extends upwardly as a whole in a direction away from the fan box and the highest point of the smoke outlet base is not higher than the top of the fan box, or the smoke outlet base extends upwardly as a whole in a direction away from the fan box and the height difference between the highest point of the smoke outlet base 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.

32. The split range hood according to claim 31, characterized in that The smoke outlet base extends horizontally as a whole in a direction away from the fan box, the smoke outlet base has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is vertically arranged or arranged obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in a direction away from the flue gas outlet end.

33. The split range hood according to claim 31, characterized in that The smoke outlet base extends upwardly as a whole in a direction away from the fan box, the smoke outlet base has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is vertically arranged or arranged obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in a direction away from the flue gas outlet end.

34. The split range hood according to claim 31, wherein, The smoke outlet base extends downwardly as a whole in a direction away from the fan box, the smoke outlet base has a flue gas inlet end and a flue gas outlet end, the flue gas outlet end is vertically arranged or arranged obliquely as a whole, and the flue gas inlet end is arranged obliquely from bottom to top in a direction away from the flue gas outlet end.

35. The split range hood according to claim 31, wherein, The plane where the mounting part of the smoke outlet base is located is parallel to the plane where the fan box outlet of the upper part of the first side plate is located.

36. The split range hood according to claim 31, wherein, The included angle between the plane where the upper part 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°.

37. The split range hood according to claim 31, wherein, The length of the upper part of the first side plate accounts for a proportion of the total length of the first side plate, and the proportion is greater than or equal to a preset proportion, and the preset proportion is not less than 40% to 90%.

38. The split range hood according to claim 31, wherein, The height of the upper part of the first side plate in the vertical direction is less than or equal to 300 mm.

39. The split range hood according to claim 1, characterized in that The center line of the inlet of the fan box is perpendicular to the axis of the impeller of the fan.

40. The split range hood according to claim 1, characterized in that The first dimension of the fan box along the left-right direction is between 100 mm and 450 mm, and the second dimension of the fan box along the front-rear direction is between 100 mm and 450 mm.

41. The split range hood according to claim 1, characterized in that The front side plate of the fan box is asymmetrically provided with a plurality of first mounting holes, the rear side plate of the fan box 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 rotating 180° around the vertical center line, and the first mounting holes and the second mounting holes are used for connecting the smoke inlet cover; and / or the left side plate of the fan box is asymmetrically provided with a plurality of third mounting holes, the right side plate of the fan box 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 rotating 180° around the vertical center line, and the third mounting holes and the fourth mounting holes are used for connecting the smoke inlet cover.

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