Rectifier device for a range hood and range hood

Abstract

The present application relates to the field of electrical appliances, and provides a rectifying device for a range hood and the range hood. The rectifying device comprises: a main flow channel rectifying plate, comprising a first main plate connected with an end of an air inlet of the range hood; a first side rectifying plate and a second side rectifying plate, respectively connected with opposite sides of the main flow channel rectifying plate; the first side rectifying plate, the second side rectifying plate and the main flow channel rectifying plate jointly define a flow guide cavity, the flow guide cavity is adapted to communicate with the air inlet, and the first main plate is inclined relative to the air inlet towards a direction close to the center of the flow guide cavity. According to the rectifying device of the embodiment of the present application, the first main plate can eliminate vortexes in the front-rear direction located above the air inlet, and the first side rectifying plate and the second side rectifying plate can also eliminate vortexes located on the left and right sides of the air inlet, thereby avoiding the formation of a triangular turbulent flow area, reducing air volume loss, and optimizing air inlet noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical appliances, in particular to a rectifying device for a range hood and the range hood. BACKGROUND

[0002] In the related art, for the range hood with the suction port arranged at the lower end, there is vortex at the front side of the air inlet cavity, and two air inlet nets are arranged at the lower end of the air inlet cavity, the flow speed inside the air inlet cavity above the air inlet net is faster than that at the two sides, and thus vortex flows to the upper side of the air inlet net at the left and right sides and the middle of the air inlet cavity, and in addition, due to the three vortexes in the left and right directions at the left and right sides of the air inlet cavity and the middle of the air inlet cavity, after the three vortexes in the left and right directions meet the vortex in the front and back directions, turbulence in two triangular regions is formed at the front side of the air inlet cavity.

[0003] At present, for the range hood with the suction port arranged at the lower end, the rectifying scheme design mainly involves rectification and noise reduction at the left and right sides, but less attention is paid to rectification and noise reduction at the front and back of the lower end of the range hood, and there is no output of the related scheme. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a rectifying device for a range hood, a first main plate can eliminate vortexes in the front and back directions above an air inlet, and first and second side rectifying plates arranged at the two sides of a main flow rectifying plate can also eliminate vortexes at the left and right sides of an air inlet cavity, so that the formation of triangular turbulence regions is avoided, the loss of air volume is reduced, and the noise of air intake is optimized.

[0005] The present application also provides a range hood.

[0006] According to the rectifying device for a range hood provided by the first aspect of the present application, the rectifying device comprises:

[0007] a main flow rectifying plate comprising a first main plate, the first main plate being adapted to be connected to an end of an air inlet of the range hood;

[0008] first and second side rectifying plates connected to opposite sides of the main flow rectifying plate, respectively;

[0009] the first and second side rectifying plates and the main flow rectifying plate together define a flow guide cavity, the flow guide cavity being adapted to communicate with the air inlet, and the first main plate being adapted to be inclined towards the center of the flow guide cavity relative to the air inlet.

[0010] According to the rectifying device, when the rectifying device is applied to the range hood, the first main plate can eliminate vortexes in the front-rear direction above the air inlet, and the first side rectifying plate and the second side rectifying plate on both sides of the main flow channel rectifying plate can also eliminate vortexes on both sides of the air inlet cavity, thereby avoiding the formation of a triangular turbulent flow area, reducing air volume loss, and optimizing air inlet noise.

[0011] According to an embodiment of the present application, the main flow channel rectifying plate further comprises a second main plate connected to the first main plate, the second main plate being located downstream of the first main plate in the air inlet direction;

[0012] The first side rectifying plate comprises a first side plate connected to the first main plate and a second side plate connected to the second main plate;

[0013] The second side rectifying plate comprises a third side plate connected to the first main plate and a fourth side plate connected to the second main plate;

[0014] The first main plate, the first side plate, and the third side plate jointly define a first flow guide cavity, and the second main plate, the second side plate, and the fourth side plate jointly define a second flow guide cavity;

[0015] In the air inlet direction along the air inlet, the flow area of the first flow guide cavity gradually decreases, and / or the flow area of the second flow guide cavity gradually increases.

[0016] According to an embodiment of the present application, the second main plate and the first main plate are arranged at an angle, and the second main plate is adapted to be inclined in a direction away from the center of the flow guide cavity relative to the air inlet.

[0017] According to an embodiment of the present application, in a direction away from the air inlet of the range hood, at least one of the first side plate and the third side plate is inclined in a direction close to the center of the first flow guide cavity;

[0018] And / or, in a direction away from the air inlet of the range hood, at least one of the second side plate and the fourth side plate is inclined in a direction away from the center of the second flow guide cavity.

[0019] According to an embodiment of the present application, at least one of the main flow channel rectifying plate, the first side rectifying plate, and the second side rectifying plate is provided with a plurality of sound-absorbing holes, and the plurality of sound-absorbing holes are uniformly distributed along the surface thereof.

[0020] According to an embodiment of the present application, the sound-absorbing holes are filled with sound-absorbing material.

[0021] According to an embodiment of the second aspect of the present application, the range hood comprises:

[0022] The smoke machine body comprises a vertical smoke collecting hood, a horizontal smoke collecting hood, and a fan arranged above the horizontal smoke collecting hood, the vertical smoke collecting hood is formed with a vertical smoke cavity and at least one air inlet, and the air inlet is communicated with the vertical smoke cavity;

[0023] At least one flow regulation device for the smoke machine according to the embodiment of the first aspect of the present application is arranged in the vertical smoke cavity and communicated with the air inlet, and the first side flow regulation plate and the second side flow regulation plate are respectively connected with the inner wall of one side of the vertical smoke collecting hood relative to the air inlet.

[0024] The smoke machine according to the embodiment of the second aspect of the present application has similar effects to the flow regulation device for the smoke machine according to the first aspect of the present application, and details are not repeated here.

[0025] According to an embodiment of the present application, the air inlet comprises a first air inlet and a second air inlet, and correspondingly, the flow regulation device comprises a first flow regulation device and a second flow regulation device, the first air inlet and the second air inlet are arranged at the same height along the side of the vertical smoke collecting hood, and the first air inlet and the second air inlet are both vertically arranged.

[0026] According to an embodiment of the present application, the second side plate of the first flow regulation device adjacent to the side wall of one side of the vertical smoke collecting hood is a first beam plate, and the fourth side plate of the second flow regulation device adjacent to the side wall of the other side of the vertical smoke collecting hood is a second beam plate.

[0027] In the direction towards the fan, the first beam plate and the second beam plate respectively extend inwardly and obliquely.

[0028] According to an embodiment of the present application, the first side plate of the first flow regulation device adjacent to the side wall of one side of the vertical smoke collecting hood is a first flat plate, and the third side plate of the second flow regulation device adjacent to the side wall of the other side of the vertical smoke collecting hood is a second flat plate.

[0029] The first flat plate and the second flat plate are arranged in parallel and vertically.

[0030] According to an embodiment of the present application, the third side plate of the first flow regulation device adjacent to the second flow regulation component is a third flat plate, and the first side plate of the second flow regulation device adjacent to the first flow regulation device is a fourth flat plate.

[0031] The third flat plate and the fourth flat plate are arranged in parallel and vertically.

[0032] According to one embodiment of the present application, the first rectifying device comprises a first steady flow plate connected with the second main plate and the fourth side plate respectively, and the second rectifying device comprises a second steady flow plate connected with the second main plate and the second side plate respectively,

[0033] The first steady flow plate and the second steady flow plate are arranged vertically and parallel to each other.

[0034] According to one embodiment of the present application, the width of the first main plate is equal to the width of the air inlet.

[0035] In any vertical section perpendicular to the air inlet, the width of the two ends of the flow guide cavity is equal to the width of the vertical smoke cavity.

[0036] According to one embodiment of the present application, in any vertical section perpendicular to the air inlet, the maximum horizontal distance between the flow guide cavity and the inner wall of the vertical smoke cavity is L2, and the minimum width of the flow guide cavity is L2, wherein L2=(0.1-0.5)*L1.

[0037] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0039] Figure 1 is one of the structural schematic diagrams of the range hood in the related art;

[0040] Figure 2 is the second structural schematic diagram of the range hood in the related art;

[0041] Figure 3 is the side view schematic diagram of the range hood provided by the embodiment of the present application;

[0042] Figure 4 is one of the three-dimensional schematic diagrams of the range hood provided by the embodiment of the present application;

[0043] Figure 5 is the second three-dimensional schematic diagram of the range hood provided by the embodiment of the present application;

[0044] Figure 6 is the front view schematic diagram of the range hood provided by the embodiment of the present application;

[0045] Figure 7 is a sectional view along Figure 6 the line A-A in

[0046] Figure 8 is a perspective view of a flow straightening device for a range hood according to an embodiment of the present application;

[0047] Figure 9 is an exploded view of a flow straightening device for a range hood according to an embodiment of the present application;

[0048] Figure 10 is a structural view of a range hood according to Embodiment 1 of the present application;

[0049] Figure 11 is a structural view of a range hood according to Embodiment 2 of the present application;

[0050] Figure 12 is a structural view of a range hood according to Embodiment 3 of the present application;

[0051] Figure 13 is a structural view of a range hood according to Embodiment 4 of the present application;

[0052] Figure 14 is a structural view of a range hood according to Embodiment 5 of the present application;

[0053] Figure 15 is a structural view of a range hood according to Embodiment 6 of the present application.

[0054] Reference signs:

[0055] 001 fan assembly; 002 housing assembly; 003 air inlet cavity; 004 air inlet screen; 005 check valve;

[0056] 100 first flow straightening device; 200 second flow straightening device; 1 main flow channel straightening plate; 11 first main plate; 12 second main plate; 2 first side flow straightening plate; 21 first side plate; 22 second side plate; 3 second side flow straightening plate; 31 third side plate; 32 fourth side plate; 41 first flow guide cavity; 42 second flow guide cavity; 51 first flow constriction plate; 52 second flow constriction plate; 53 third flow constriction plate; 54 fourth flow constriction plate; 61 first flow equalization plate; 62 second flow equalization plate; 63 third flow equalization plate; 64 fourth flow equalization plate; 71 first flow stabilizing plate; 72 second flow stabilizing plate; 8 air inlet; 81 first air inlet; 82 second air inlet; 91 vertical smoke collecting hood; 911 vertical smoke cavity; 92 horizontal smoke collecting hood; 10 fan. DETAILED DESCRIPTION

[0057] The embodiments of the present application will be further described in details below with reference to the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0058] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0061] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0062] A flow rectifying device for a range hood (hereinafter referred to as flow rectifying device) according to an embodiment of the first aspect of the present application is described below with reference to the accompanying drawings.

[0063] As shown in the drawings, the flow rectifying device according to the embodiment of the present application comprises a main flow channel rectifying plate 1, a first side flow rectifying plate 2 and a second side flow rectifying plate 3. Figures 3 to 15

[0064] The main flow channel rectifying plate 1 comprises a first main plate 11 adapted to be connected to an end of an air inlet 8 of the range hood. The first side flow rectifying plate 2 and the second side flow rectifying plate 3 are respectively connected to opposite sides of the main flow channel rectifying plate 1.

[0065] The first side flow rectifying plate 2, the second side flow rectifying plate 3 and the main flow channel rectifying plate 1 together define a flow guiding cavity adapted to be in communication with the air inlet 8, and the first main plate 11 is adapted to be inclined towards the center of the flow guiding cavity relative to the air inlet 8.

[0066] When the flow rectifying device according to the embodiment of the present application is applied to the range hood, the first main plate 11 can eliminate the vortex in the front-rear direction above the air inlet 8, and the first side flow rectifying plate 2 and the second side flow rectifying plate 3 on both sides of the main flow channel rectifying plate 1 can also eliminate the vortex on both sides of the air inlet cavity, thereby avoiding the formation of a triangular turbulent flow area, reducing air volume loss and optimizing air intake noise.

[0067] The above-mentioned "the first main plate 11 is adapted to be connected to an end of the air inlet 8 of the range hood" means that one end of the first main plate 11 is connected to the end of the side of the air inlet 8 facing the fan 10, that is, the first main plate 11 is located downstream of the air inlet 8 in the air inlet direction and the first main plate 11 covers the side of the air inlet 8 facing the fan 10, so that the airflow entering the air inlet cavity from the air inlet 8 first passes through the first main plate 11 to reach the fan 10 of the range hood.

[0068] The two side walls of the above-mentioned flow guiding cavity are respectively the first side flow rectifying plate 2 and the second side flow rectifying plate 3, the main flow channel rectifying plate 1 is the bottom wall of the flow guiding cavity, and the inlet of the flow guiding cavity is in communication with the air inlet 8. The airflow entering from the air inlet 8 enters the fan 10 of the range hood after passing through the flow guiding cavity. The center of the above-mentioned flow guiding cavity refers to the assumed center of the flow guiding cavity, which can be simply understood as the internal region of the cavity of the flow guiding cavity in this embodiment.

[0069] As shown in the drawings, the flow rectifying device according to the embodiment of the present application comprises a main flow channel rectifying plate 1, a first side flow rectifying plate 2 and a second side flow rectifying plate 3. Figure 1 Figure 2 ​​As shown, the specific formation process of the vortex involved in the above effects will be explained below according to the specific structure in the related art and the basic knowledge in the field: according to the conventional knowledge mastered by those skilled in the art, it can be understood that, in order to improve the effect of absorbing oil fume, the air inlet of the range hood in the related art is generally arranged at an angle relative to the horizontal direction, and the above structure will result in the following: after the airflow enters the smoke cavity from the air inlet, due to the inclined arrangement of the air inlet relative to the horizontal plane, the airflow will generally change in the flow direction, and the above change in the flow direction will cause the vortex to be formed above the inside of the air inlet.

[0070] In addition, according to the conventional knowledge mastered by those skilled in the art, it can also be understood that, due to the fact that the flow rate of the airflow near the end of the inlet is less than that of the airflow at the middle position of the air inlet, in different air pressure environments, the airflow adjacent to the end of the air inlet will be deflected towards the middle position of the air inlet, thereby causing the vortex to be formed in the left and right side regions of the air inlet cavity, respectively.

[0071] For example, as shown in Figure 1 and Figure 2 , the air inlet net 004 is vertically arranged and directly communicates with the vertical air inlet cavity 003 of the range hood. As shown in Figure 1 , when the airflow enters the air inlet cavity 003 from the air inlet net 004, the airflow changes from the horizontal flow direction to the vertical flow direction, thereby causing the vortex with the clockwise flow direction to be formed above the inside of the air inlet net 004. As shown in Figure 2 , due to the fact that the flow rate of the airflow passing through the middle position of the air inlet net 004 is greater than that of the airflow passing through the left and right side regions of the air inlet net 004, the airflow on the left and right sides is deflected towards the middle, thereby causing the vortex to be formed on the left and right sides of the air inlet cavity 003, and the vortex direction is as shown in Figure 2 .

[0072] As can be seen from the above, Figure 1 and Figure 2 , the range hood in the related art has three vortexes in the left and right directions at the left and right sides of the air inlet cavity 003 and the middle position of the air inlet cavity 003, and after the above three vortexes meet the vortex in the front and back directions above the air inlet net 004, the vortexes collectively form two turbulent flow regions on the front side of the air inlet cavity 003.

[0073] The rectifying structure in the related art will be compared with the rectifying device of the present application below to highlight the beneficial effects of the rectifying device of the present application:

[0074] The range hood in the related art usually does not have a flow regulation structure for the above-mentioned multiple vortexes. Even if some range hoods in the related art have a flow regulation structure, the flow regulation structure only involves elimination of vortexes on the left and right sides of the air inlet cavity (for example Figure 2 vortexes shown in the figure), or can only play a sound elimination effect and cannot eliminate vortexes, that is, the flow regulation structure in the related art usually only involves flow regulation and sound elimination on the left and right sides of the air inlet cavity, and cannot eliminate vortexes in the front-rear direction above the air inlet mesh (for example Figure 1 vortexes shown in the figure), and further cannot avoid the formation of the above-mentioned triangular turbulence area.

[0075] In summary, the flow regulation structure in the related art cannot eliminate vortexes in the front-rear direction above the air inlet mesh, and does not have an overall solution to all vortexes near the air inlet, so it cannot completely eliminate vortexes near the air inlet, and still causes the formation of a triangular turbulence area and cannot solve the noise problem caused by other vortexes.

[0076] In order to solve the above-mentioned technical problems, when the flow regulation device according to the present application is installed in the air inlet cavity of the range hood, on the one hand, since the first main plate 11 is inclined towards the flow guide cavity, the first main plate 11 is located in the flow path of vortexes in the front-rear direction above the air inlet 8, so that the first main plate 11 can eliminate vortexes in the front-rear direction above the air inlet 8; on the other hand, the first side flow regulation plate 2 and the second side flow regulation plate 3 located on both sides of the main flow channel flow regulation plate 1 can also eliminate vortexes on the left and right sides of the air inlet cavity. In summary, the flow regulation device according to the present application can not only eliminate vortexes on the left and right sides of the air inlet cavity, but also eliminate vortexes in the front-rear direction above the air inlet 8, so as to greatly reduce the loss of air volume and optimize the air inlet noise, and further, since all vortexes near the air inlet 8 are eliminated by the flow regulation device, the formation of a triangular turbulence area can be avoided, and the smoke suction effect and noise reduction effect are further optimized.

[0077] The purpose of the above description is to highlight the difference between the flow regulation device according to the present application and the flow regulation device in the related art. The flow regulation device according to the present application will be described in detail below through various specific embodiments.

[0078] As shown in Figure 3 and Figure 4 According to one embodiment of the present application, the main flow channel flow regulation plate 1 further comprises a second main plate 12 connected with the first main plate 11, and the second main plate 12 is located downstream of the first main plate 11 in the air inlet direction.

[0079] The first side rectifying plate 2 comprises a first side plate 21 connected with the first main plate 11 and a second side plate 22 connected with the second main plate 12; and the second side rectifying plate 3 comprises a third side plate 31 connected with the first main plate 11 and a fourth side plate 32 connected with the second main plate 12.

[0080] The first main plate 11, the first side plate 21 and the third side plate 31 jointly define a first flow guide cavity 41, and the second main plate 12, the second side plate 22 and the fourth side plate 32 jointly define a second flow guide cavity 42.

[0081] In the air inlet direction along the air inlet 8, the flow area of the second flow guide cavity 42 gradually increases, and / or the flow area of the first flow guide cavity 41 gradually decreases.

[0082] In the embodiment, when the air flow enters the range hood from the air inlet 8, the air flow first flows through the first flow guide cavity 41, then enters the second flow guide cavity 42 connected with the first flow guide cavity 41 after passing through the first flow guide cavity 41, and finally flows into the fan 10 of the range hood through the second flow guide cavity 42 and is discharged.

[0083] It can be understood that, since the flow area of the first flow guide cavity 41 gradually decreases, the first flow guide cavity 41 can accelerate the flow of the air flow to increase the flow rate of the air flow, so as to expand the negative pressure range near the air inlet 8, thereby increasing the flow of the air flow entering the air inlet 8 and improving the oil fume extraction effect of the range hood.

[0084] Since the flow area of the second flow guide cavity 42 gradually increases, the second flow guide cavity 42 can slow down the flow of the air flow to decelerate the air flow, which is beneficial to the noise control of the range hood and avoids the noise caused by the too fast flow rate of the air flow. In addition, in the case that the range hood is provided with multiple air inlets 8 and corresponding multiple rectifying devices, by reducing the flow rate of the air flow through the second flow guide cavity 42, the air flow entering from different air inlets 8 can also avoid large collision loss when meeting, so as to ensure the air flow circulation effect in the air inlet cavity of the range hood and also reduce the noise.

[0085] In some embodiments of the present application, for the rectifying device, only the first flow guide cavity 41 can be provided as a structure with a gradually decreasing flow area, and the flow area of the second flow guide cavity 42 is not specifically limited; only the second flow guide cavity 42 can be provided as a structure with a gradually increasing flow area, and the flow area of the first flow guide cavity 41 is not specifically limited; of course, the first flow guide cavity 41 can be provided as a structure with a gradually decreasing flow area, and the second flow guide cavity 42 can be provided as a structure with a gradually increasing flow area. It should be noted that, no matter which structure is adopted in the above three embodiments, the effect of improving the oil fume extraction effect of the range hood and controlling the noise can be achieved.

[0086] As shown in FIG. 1, the range hood 1 comprises a housing 1a, a fan 10 and a rectifying device 1b. Figure 3and Figure 4 As shown, in a specific embodiment of the present invention, if the air inlet 8 of the range hood is vertically arranged and disposed on the front wall of the vertical smoke chamber 911 of the range hood, and the air inlet 8 is directly connected to the vertical smoke chamber 911, and a second main board 12 and a first main board 11 are arranged sequentially from top to bottom in the vertical smoke chamber 911, the bottom end of the first main board 11 is connected to the top end of the air inlet 8, and the first main board 11 extends obliquely toward the rear wall of the vertical smoke chamber 911.

[0087] The first main board 11 is connected to the first side plate 21 and the third side plate 31 on its left and right sides respectively. The first main board 11, the first side plate 21, the third side plate 31 and the rear wall of the vertical smoke chamber 911 together define the first guide cavity 41. The second main board 12 is connected to the second side plate 22 and the fourth side plate 32 on its left and right sides respectively. The second main board 12, the second side plate 22, the fourth side plate 32 and the rear wall of the vertical smoke chamber 911 together define the second guide cavity 42.

[0088] like Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the second main board 12 and the first main board 11 are arranged at an angle, and the second main board 12 is adapted to be tilted relative to the air inlet 8 toward a direction away from the center of the guide cavity.

[0089] In this way, the main flow rectifier plate 1 forms an undulating structure that protrudes into the flow guide cavity. The structure is closely aligned with the flow path of the airflow after entering the flow guide cavity, which can prevent the airflow from directly colliding with the second main plate 12 and causing unnecessary airflow loss.

[0090] It should be noted that the present invention does not specifically limit the size of the angle between the second motherboard 12 and the first motherboard 11, as long as the angle satisfies the tilt direction requirements of the first motherboard 11 and the second motherboard 12.

[0091] like Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, if the air inlet 8 of the range hood is vertically arranged and disposed on the front wall of the vertical smoke chamber 911 of the range hood, and the air inlet 8 is directly connected to the vertical smoke chamber 911, the first main board 11 extends upward and inclined toward the rear wall of the vertical smoke chamber 911, and the second main board 12 extends upward and inclined toward the front wall of the vertical smoke chamber 911 (that is, the second main board 12 is inclined relative to the air inlet 8 toward the direction away from the center of the guide cavity).

[0092] like Figure 5 and Figure 6As shown, according to one embodiment of the present application, at least one of the first side plate 21 and the third side plate 31 is inclined in a direction away from the center of the first flow guide cavity 41 along the air inlet direction of the air inlet 8; and / or, at least one of the second side plate 22 and the fourth side plate 32 is inclined in a direction away from the center of the second flow guide cavity 42 along the air inlet direction of the air inlet 8.

[0093] It can be understood that the center of the first flow guide cavity 41 refers to the assumed center of the first flow guide cavity 41, which can be simply understood as the internal region of the cavity of the first flow guide cavity 41 in this embodiment. Similarly, the center of the second flow guide cavity 42 refers to the assumed center of the second flow guide cavity 42, which can be simply understood as the internal region of the cavity of the second flow guide cavity 42 in this embodiment.

[0094] In this way, based on the above structure, the gradual decrease of the flow area of the first flow guide cavity 41 in the air flow direction can be achieved, and / or the gradual increase of the flow area of the second flow guide cavity 42 in the air flow direction can be achieved, and the structure is simple and convenient to manufacture.

[0095] As shown in Figure 3 and Figure 4 In one specific embodiment of the present application, the first side plate 21 and the third side plate 31 are both inclined upward and in a direction away from the center of the first flow guide cavity 41, and the second side plate 22 and the fourth side plate 32 are both inclined upward and in a direction close to the center of the second flow guide cavity 42.

[0096] It should be noted that the above description of the respective inclination directions of the first side plate 21, the second side plate 22, the third side plate 31 and the fourth side plate 32 in the above embodiments is only some of the many possible embodiments, and does not constitute a specific limitation on the respective inclination directions of the first side plate 21, the second side plate 22, the third side plate 31 and the fourth side plate 32. The above four side plates (i.e. the first side plate 21, the second side plate 22, the third side plate 31 and the fourth side plate 32) can also have other inclination directions, as long as they can meet the above limitations on the flow area of the first flow guide cavity 41 and / or the second flow guide cavity 42.

[0097] It should also be noted that when the first side plate 21, the second side plate 22, the third side plate 31 and the fourth side plate 32 are selected to have different inclination directions, their effects are also different. The different effects brought about by different inclination directions of the four side plates will be explained in detail below in combination with a specific application scenario (i.e. a range hood).

[0098] As shown in Figure 8 and Figure 9As shown, according to one embodiment of the present application, at least one of the main flow channel rectifier plate 1, the first side rectifier plate 2 and the second side rectifier plate 3 is provided with a plurality of sound reduction holes (not shown in the figure), which are evenly distributed along the surface thereof.

[0099] In this way, the sound reduction holes can reduce noise, thereby reducing the overall noise of the range hood. For example, the main flow channel rectifier plate 1, the first side rectifier plate 2 and the second side rectifier plate 3 are each provided with a plurality of evenly distributed sound reduction holes.

[0100] According to one embodiment of the present application, the sound reduction holes are filled with sound reduction material (not shown in the figure). In this way, the working noise of the range hood can be further reduced. For example, the sound reduction material can be sponge, cloth or the like.

[0101] The range hood according to the second aspect of the present application is described below with reference to the accompanying drawings, which includes the rectifier device for a range hood according to the first aspect of the present application, and further includes a range hood body.

[0102] As shown in the figure, Figures 3 to 15 the range hood body includes a vertical smoke collecting cover 91, a horizontal smoke collecting cover 92 and a fan arranged above the horizontal smoke collecting cover 92, the vertical smoke collecting cover 91 is formed with a vertical smoke cavity 911 and at least one air inlet 8, the air inlet 8 communicates with the vertical smoke cavity 911;

[0103] The number of the rectifier device for a range hood is at least one, the rectifier device is arranged in the vertical smoke cavity 911 and communicates with the air inlet 8, the first side rectifier plate 2 and the second side rectifier plate 3 are respectively connected with the inner wall of the side of the vertical smoke collecting cover 91 relative to the air inlet 8.

[0104] The range hood according to the embodiments of the present application has similar effects to the rectifier device for a range hood according to the first aspect of the present application, which will not be described here again.

[0105] As shown in the figure, Figure 3 according to one embodiment of the present application, in any vertical cross section perpendicular to the air inlet 8, the width of the vertical smoke cavity 911 is L1, and the maximum horizontal distance of the flow guide cavity from the inner wall of the vertical smoke cavity 911 is L2, wherein L2=(0.1-0.5)*L1. In this way, the included angle between the first main plate 11 and the second main plate 12 can be ensured to be suitable for the overall size of the range hood, so that the rectification effect of the rectifier device is better.

[0106] As shown in the figure, Figure 3As shown in the figure, according to one embodiment of the present application, in any vertical section perpendicular to the air inlet 8, the width of the vertical smoke cavity 911 is L1, and the distance between the volute surface in front of the main air inlet of the volute and the back plate of the fan is L3, wherein L1=(0.5-1.5)*L3. In this way, the sudden change of the airflow direction during the process of the airflow flowing out of the vertical smoke cavity 911 and into the fan 10 can be avoided, and the airflow loss can be reduced.

[0107] As shown in the figure, according to one embodiment of the present application, the air inlet 8 includes a first air inlet 81 and a second air inlet 82, and the flow regulating device includes a first flow regulating device 100 and a second flow regulating device 200, respectively. The first air inlet 81 and the second air inlet 82 are arranged at the same height along the side of the vertical smoke hood 91, and the first air inlet 81 and the second air inlet 82 are both vertically arranged. Figure 5 Figure 6 In this way, by arranging two air inlets 8 on the range hood and arranging corresponding flow regulating devices for each air inlet 8, the oil fume suction effect of the range hood can be better, and the noise can be smaller. In addition, the air suction effect of the vertically arranged air inlet 8 is better.

[0108] As shown in the figure, according to one embodiment of the present application, the width of the first main plate 11 is equal to the width of the air inlet 8. In any vertical section perpendicular to the air inlet 8, the width of the two ends of the flow guide cavity is equal to the width of the vertical smoke cavity 911. In this way, the flow guide cavity can completely cover the air inlet 8, so that the flow guiding effect of the flow guide cavity is better.

[0109] As shown in the figure, according to one embodiment of the present application, in any vertical section parallel to the air inlet 8, the length of the air inlet 8 is L4, the horizontal distance between the bottom end and the top end of the third side plate 31 is L5, and the horizontal distance between the bottom end and the top end of the first side plate 21 is L6, wherein L5=(0.05-0.25)*L4, and L6=(0.05-0.25)*L4. It should be explained that the sizes of L5 and L6 can be the same or different. In this way, the airflow direction change during the process of the airflow flowing through the first flow guide cavity 41 can be avoided, and the airflow loss can be reduced. Figure 6 As shown in the figure, according to one embodiment of the present application, for the first flow regulating device 100, L6≥L5; and for the second flow regulating device 200, L5≥L6. In this way, since the inclination of the side plate close to the vertical smoke cavity 911 is larger, the generation of vortex on both sides can be further avoided.

[0110] Figure 10 As shown in the figure, according to one embodiment of the present application, for the first flow regulating device 100, L6≥L5; and for the second flow regulating device 200, L5≥L6. In this way, since the inclination of the side plate close to the vertical smoke cavity 911 is larger, the generation of vortex on both sides can be further avoided.

[0111] As shown in the figure, according to one embodiment of the present application, for the first flow regulating device 100, L6≥L5; and for the second flow regulating device 200, L5≥L6. In this way, since the inclination of the side plate close to the vertical smoke cavity 911 is larger, the generation of vortex on both sides can be further avoided. Figure 10 As shown in the figure, according to one embodiment of the present application, for the first flow regulating device 100, L6≥L5; and for the second flow regulating device 200, L5≥L6. In this way, since the inclination of the side plate close to the vertical smoke cavity 911 is larger, the generation of vortex on both sides can be further avoided.

[0112] Figures 13 to 15 ​​​As shown, according to one embodiment of the present invention, the second side plate 22 of the first rectifier 100 adjacent to one side wall of the vertical smoke hood 91 is a first beam plate 51, and the fourth side plate 32 of the second rectifier 200 adjacent to the other side wall of the vertical smoke hood 91 is a second beam plate 52. In the direction toward the fan, the first beam plate 51 and the second beam plate 52 extend inwardly at an incline.

[0113] In this embodiment, "inward tilt" refers to tilting towards the central axis of the vertical smoke chamber 911. Thus, on a vertical section parallel to the air inlet 8, the first beam plate 51 and the second beam plate 52 form a funnel-shaped upward-facing constriction structure. This structure can accommodate the main air inlet of the fan 10 being positioned between the two air inlets 8, thereby using the second guide cavity 42 to guide the airflow before it enters the fan 10, ensuring the airflow flows as close to the fan 10 as possible, thus avoiding airflow loss and noise problems caused by sudden changes in airflow direction. For example, as shown in the figure, on a vertical section parallel to the air inlet 8, the first beam plate 51 extends upward and to the right at an angle, and the second beam plate 52 extends upward and to the left at an angle.

[0114] like Figures 10 to 12 As shown, according to one embodiment of the present invention, the first side plate 21 of the first rectifier 100 adjacent to one side wall of the vertical smoke hood 91 is a third beam plate 53, and the third side plate 31 of the second rectifier 200 adjacent to the other side wall of the vertical smoke hood 91 is a fourth beam plate 54. In the direction toward the fan, the third beam plate 53 and the fourth beam plate 54 extend inwardly at an incline.

[0115] In this embodiment, "inward tilt" refers to tilting towards the central axis of the vertical smoke chamber 911. Thus, in a vertical section parallel to the air inlet 8, the third beam plate 53 and the fourth beam plate 54 form a funnel-shaped upward-facing constriction structure. This structure allows for better acceleration and rectification of the airflow through the first guide cavity 41 when the flue gas flow rate is high. For example, in a vertical section parallel to the air inlet 8, the third beam plate 53 extends upward and to the right at an upward tilt, and the fourth beam plate 54 extends upward and to the left at an upward tilt.

[0116] like Figures 13 to 15 As shown, according to one embodiment of the present invention, the first side plate 21 of the first rectifier 100 adjacent to one side wall of the vertical smoke hood 91 is a first levitation plate 61, and the third side plate 31 of the second rectifier 200 adjacent to the other side wall of the vertical smoke hood 91 is a second levitation plate 62. The first levitation plate 61 and the second levitation plate 62 are parallel to each other and vertically arranged.

[0117] Thus, the airflow loss caused by the airflow due to the too large cross-section change of the first flow guide cavity 41 is reduced when the airflow flows through the first flow guide cavity 41.

[0118] As shown in Figure 12 and Figure 15 According to one embodiment of the present application, the third side plate 31 of the first flow regulating device 100 adjacent to the second flow regulating device is a third flat flow plate 63, and the first side plate 21 of the second flow regulating device 200 adjacent to the first flow regulating device 100 is a fourth flat flow plate 64.

[0119] Thus, the airflow loss caused by the airflow due to the too large cross-section change of the first flow guide cavity 41 is reduced when the airflow flows through the first flow guide cavity 41.

[0120] As shown in Figure 15 Further, the first flat flow plate 61 and the second flat flow plate 62 are parallel and vertically arranged, and the third flat flow plate 63 and the fourth flat flow plate 64 are parallel and vertically arranged.

[0121] Thus, in the vertical cross-section parallel to the air inlet 8, the first flow guide cavity 41 of the first flow regulating device 100 and the first flow guide cavity 41 of the second flow regulating device 200 are both equal in width in the airflow direction, so that the first flow guide cavity 41 forms an equal-interface flow regulating section, which can further reduce the airflow loss caused by the cross-section mutation in a large flow state.

[0122] As shown in Figure 11 and Figure 12 , and Figure 14 and Figure 15 According to one embodiment of the present application, the first flow regulating device 100 includes a first flow stabilizing plate 71 connected to the second main plate 12 and the fourth side plate 32 thereof respectively, the second flow regulating device 200 includes a second flow stabilizing plate 72 connected to the second main plate 12 and the second side plate 22 thereof respectively, and the first flow stabilizing plate 71 and the second flow stabilizing plate 72 are parallel and vertically arranged.

[0123] Thus, by arranging the first flow stabilizing plate 71 and the second flow stabilizing plate 72 near the middle of the vertical smoke cavity 911 as straight sections, a stable flow regulating section is formed at the end part of the second flow guide cavity 42, so that a straight section stable flow process can be performed on the airflow near the middle part of the vertical smoke cavity 911, and the collision loss of the two airflows respectively from the first flow regulating device and the second flow regulating device after meeting is reduced.

[0124] Several specific embodiments of the range hood according to the present application will be described below with reference to the accompanying drawings.

[0125] Embodiment 1: As shown in Figure 10As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (third beam flow plate 53) is inclined upward and to the right, the second side plate 22 is inclined upward and to the left, the third side plate 31 is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right.

[0126] As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the second rectifying device 200 are as follows: the first side plate 21 is inclined upward and to the right, the second side plate 22 is inclined upward and to the left, the third side plate 31 (fourth beam flow plate 54) is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right.

[0127] Embodiment 2: as shown in Figure 11 As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (third beam flow plate 53) is inclined upward and to the right, the second side plate 22 is inclined upward and to the left, the third side plate 31 is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right, and the upper portion of the fourth side plate 32 is connected with a vertically arranged first flow stabilizing plate 71.

[0128] As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the second rectifying device 200 are as follows: the first side plate 21 is inclined upward and to the right, the second side plate 22 is inclined upward and to the left, the third side plate 31 (fourth beam flow plate 54) is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right, and the upper portion of the second side plate 22 is connected with a vertically arranged second flow stabilizing plate 72.

[0129] Embodiment 3: as shown in Figure 12 As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (third beam flow plate 53) is inclined upward and to the right, the second side plate 22 is inclined upward and to the left, the third side plate 31 (third horizontal flow plate 63) is arranged vertically, the fourth side plate 32 is inclined upward and to the right, and the upper portion of the fourth side plate 32 is connected with a vertically arranged first flow stabilizing plate 71.

[0130] As shown in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the second rectifying device 200 are as follows: the first side plate 21 (fourth horizontal flow plate 64) is arranged vertically, the second side plate 22 is inclined upward and to the left, the third side plate 31 (fourth beam flow plate 54) is inclined upward and to the left, the fourth side plate 32 is inclined upward and to the right, and the upper portion of the second side plate 22 is connected with a vertically arranged second flow stabilizing plate 72.

[0131] Embodiment 4: as shown in Figure 13As shown, in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (the first flow plate 61) is vertically arranged, the second side plate 22 (the first flow plate 51) is inclined upward and to the right, the third side plate 31 is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right. Moreover, the inclination degree of the fourth side plate 32 is greater than that of the second side plate 22.

[0132] As shown, in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (the first flow plate 61) is vertically arranged, the second side plate 22 (the first flow plate 51) is inclined upward and to the right, the third side plate 31 is inclined upward and to the left, and the fourth side plate 32 is inclined upward and to the right. Moreover, the inclination degree of the fourth side plate 32 is greater than that of the second side plate 22.

[0133] Embodiment 5: as shown in Figure 14 As shown, compared with Embodiment 3, Embodiment 4 adds the first flow plate 71 connected with the fourth side plate 32 of the first rectifying device 100, and the second flow plate 72 connected with the second side plate 22 of the second rectifying device 200.

[0134] Embodiment 6: as shown in Figure 15 As shown, in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (the first flow plate 61) is vertically arranged, the second side plate 22 (the first flow plate 51) is inclined upward and to the right, the third side plate 31 (the third flow plate 63) is vertically arranged, and the fourth side plate 32 is inclined upward and to the right.

[0135] As shown, in the vertical section parallel to the air inlet 8, the inclination directions of the various plate members constituting the first rectifying device 100 are as follows: the first side plate 21 (the first flow plate 61) is vertically arranged, the second side plate 22 (the first flow plate 51) is inclined upward and to the right, the third side plate 31 (the third flow plate 63) is vertically arranged, and the fourth side plate 32 is inclined upward and to the right.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0137] The above embodiments are only used for illustrating the present application, but not limiting the present application. Although the present application is explained in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and should be covered in the scope of claims of the present application.

Claims

1. A rectifier for a range hood, characterized in that, include: The main flow rectifier board includes a first main board, which is adapted to be connected to the end of the air inlet of the range hood; The first side rectifier and the second side rectifier are respectively connected to the opposite sides of the main flow rectifier. The first side rectifier, the second side rectifier, and the main flow rectifier together define a flow guide cavity, which is adapted to communicate with the air inlet, and the first main board is adapted to be inclined relative to the air inlet toward the center of the flow guide cavity; The main flow rectifier board also includes a second motherboard connected to the first motherboard, and the second motherboard is located downstream of the first motherboard in the air intake direction; The first side rectifier plate includes a first side plate connected to the first motherboard and a second side plate connected to the second motherboard; The second side rectifier plate includes a third side plate connected to the first motherboard and a fourth side plate connected to the second motherboard; The first motherboard, the first side plate, and the third side plate together define a first flow guide cavity, and the second motherboard, the second side plate, and the fourth side plate together define a second flow guide cavity; In the direction away from the air inlet of the range hood, at least one of the first side plate and the third side plate is inclined toward the center of the first guide cavity; And / or, in a direction away from the air inlet of the range hood, at least one of the second side plate and the fourth side plate is inclined in a direction away from the center of the second guide cavity.

2. The rectifier for a range hood according to claim 1, characterized in that, The second main board and the first main board are arranged at an angle, and the second main board is adapted to tilt relative to the air inlet in a direction away from the center of the guide cavity.

3. The rectifier for a range hood according to any one of claims 1 to 2, characterized in that, At least one of the main flow rectifier, the first side rectifier, and the second side rectifier is provided with a plurality of noise reduction holes, which are evenly distributed along their surfaces.

4. The rectifier for a range hood according to claim 3, characterized in that, The sound-absorbing holes are filled with sound-absorbing material.

5. A range hood, characterized in that, include: The main body of the smoke hood includes a vertical smoke collection hood, a horizontal smoke collection hood, and a fan disposed above the horizontal smoke collection hood. The vertical smoke collection hood forms a vertical smoke chamber and at least one air inlet, and the air inlet communicates with the vertical smoke chamber. At least one rectifier for a range hood as described in any one of claims 1 to 4, disposed within the vertical smoke chamber and communicating with the air inlet, wherein the first side rectifier plate and the second side rectifier plate are respectively connected to the inner wall of the vertical smoke hood on the side opposite to the air inlet.

6. The range hood according to claim 5, characterized in that, The air inlet includes a first air inlet and a second air inlet. Correspondingly, the rectifier includes a first rectifier and a second rectifier. The first air inlet and the second air inlet are spaced apart at the same height along the side of the vertical smoke hood, and both the first air inlet and the second air inlet are vertically arranged.

7. The range hood according to claim 6, characterized in that, In the case of a rectifier as described in any one of claims 2 to 4, the second side plate of the first rectifier adjacent to one side wall of the vertical smoke hood is a first beam plate, and the fourth side plate of the second rectifier adjacent to the other side wall of the vertical smoke hood is a second beam plate. In the direction toward the wind turbine, the first beam plate and the second beam plate extend inward at an inward angle.

8. The range hood according to claim 6, characterized in that, In the case of a rectifier as described in any one of claims 2 to 4, the first side plate of the first rectifier adjacent to one side wall of the vertical smoke hood is a first flow plate, and the third side plate of the second rectifier adjacent to the other side wall of the vertical smoke hood is a second flow plate. The first and second deflectors are parallel to each other and vertically arranged.

9. The range hood according to claim 8, characterized in that, The third side plate of the first rectifier adjacent to the second rectifier is a third flow plate, and the first side plate of the second rectifier adjacent to the first rectifier is a fourth flow plate; The third and fourth deflectors are parallel to each other and vertically arranged.

10. The range hood according to any one of claims 6 to 9, characterized in that, In the case of a rectifier as described in any one of claims 2 to 4, the first rectifier includes a first current-stabilizing plate connected to its second main board and the fourth side plate respectively, and the second rectifier includes a second current-stabilizing plate connected to its second main board and the second side plate respectively. The first flow stabilizer and the second flow stabilizer are parallel to each other and vertically arranged.

11. The range hood according to any one of claims 5 to 9, characterized in that, The width of the first motherboard is the same as the width of the air inlet; On any vertical section perpendicular to the air inlet, the width of the two ends of the guide cavity is equal to the width of the vertical smoke cavity.

12. The range hood according to claim 11, characterized in that, On any vertical section perpendicular to the air inlet, the width of the vertical smoke chamber is L1, and the maximum horizontal distance between the guide cavity and the inner wall of the vertical smoke chamber is L2, where L2 = (0.1~0.5) * L1.

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