Oil screen structure of range hood and range hood

Abstract

The oil screen structure is arranged at an air inlet of a range hood body, and comprises a fixing frame, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens, a plurality of oil screens and a plurality of oil screens, wherein the fixing frame is arranged at the air inlet; the driving air guide plate is movably arranged on the fixed frame; the plurality of driven air guide plates are respectively arranged on the fixed frame at intervals; the output end of the driving motor is connected with the driving air guide plate, so that the driving motor drives the driving air guide plate to rotate; the synchronous rod is connected with the driving air guide plate and the multiple driven air guide plates, and the driving air guide plate drives the multiple driven air guide plates to rotate synchronously through the synchronous rod. The structure is simple, and the problem that the aerodynamic noise performance is poor due to flow separation generated after airflow passes through an oil screen can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to an oil net structure of a range hood and the range hood. Background Art

[0002] In order to meet the safety requirements (experimental value test) and the structural strength requirements of the oil net itself, the traditional range hood oil net is usually designed with ribs with flanges. When the impeller rotates, negative pressure is generated in the fan, causing the oil smoke to pass through the oil net from the outside. Due to the influence of the rib width, the gas flows and separates at the rear of the ribs of the oil net. The generation and collapse of the separation vortex here is an important source of aerodynamic noise on the air inlet side of the range hood. Figure 1 shown.

[0003] Another type of oil net is a fine mesh, such as a square mesh, a honeycomb mesh, etc., that is, the width of the ventilation holes and ribs are very small. This design can greatly reduce the flow separation when the airflow passes through the oil net, and also has a certain sound insulation effect. However, due to the low air permeability of the dense mesh, the motor power requirement is higher under the same air volume.

[0004] In the prior art, most oil nets are usually fixed structures. In actual use, there is uncertainty in the location of the smoke source and the amount of smoke generated. The fixed oil net position does not enable the range hood to have a good smoke collection effect in all usage scenarios. Existing products on the market have a design of two movable layers of oil nets. The air permeability of the oil net is controlled by controlling the different positions of the two layers of oil nets, and the negative pressure distribution on the oil net airflow surface is changed to improve the smoke collection effect. The overlapping design of the two layers of oil smoke has limited effect on the negative pressure distribution, and the air inlet area after overlapping is reduced, and the air duct resistance becomes larger. From the perspective of air duct optimization, it is not an ideal solution. Summary of the invention

[0005] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes an oil net structure for a range hood, which has a simple structure and can effectively solve the problem of poor aerodynamic noise performance caused by flow separation after the airflow passes through the oil net.

[0006] In addition, the utility model also provides a range hood, which has a reasonable design and can further improve the smoke collection effect of the range hood.

[0007] The first objective is achieved through the following technical solutions:

[0008] An oil net structure of a range hood, arranged at the air inlet of a range hood body, comprises:

[0009] A fixing frame, the fixing frame being arranged at the air inlet;

[0010] An active air deflector, the active air deflector being movably arranged on the fixing frame;

[0011] A plurality of driven air guide plates, wherein the plurality of driven air guide plates are respectively arranged on the fixing frame at intervals;

[0012] A driving motor, wherein an output end of the driving motor is connected to the active air guide plate so that the driving motor drives the active air guide plate to rotate;

[0013] A synchronization rod is connected to the active air guide plate and the plurality of driven air guide plates. The active air guide plate drives the plurality of driven air guide plates to rotate synchronously through the synchronization rod.

[0014] In some embodiments, the cross-sections of the active air guide plate and the driven air guide plate are airfoil-shaped.

[0015] In some embodiments, the thickness of the active air guide plate and the driven air guide plate gradually decreases along the air intake direction.

[0016] In some embodiments, the swing range of the active air guide plate and the driven air guide plate is -45° to 45°.

[0017] In some embodiments, a protruding rod is protruded outward from the lower end of the active air guide plate and the driven air guide plate, a connecting rod is provided at the end of the protruding rod, and the synchronization rod is respectively connected to the plurality of connecting rods to synchronize the rotation of the active air guide plate and the driven air guide plate.

[0018] In some embodiments, a plurality of through holes are provided at intervals on the synchronization rod, and a buckle portion is provided at one end of the connecting rod away from the protruding rod, and the buckle portion passes through the through hole to buckle the synchronization rod and the connecting rod together.

[0019] The above second purpose is achieved through the following technical solutions:

[0020] A range hood comprises a range hood body and at least one set of oil net structures of the range hood as described in any one of the above embodiments, wherein an air inlet is provided on the range hood body, and the oil net structure is arranged at the air inlet.

[0021] In some embodiments, when the number of the oil net structures is two or more, each group of the oil net structures is sequentially arranged along the transverse direction at the air inlet.

[0022] In some embodiments, a fan is further included, and the fan is disposed in the range hood body, and the longitudinal lines of the active air guide plate and the driven air guide plate are perpendicular to the axial plane of the fan.

[0023] In some embodiments, a smoke sensor is further included, and the smoke sensor is respectively disposed on the left and right ends of the air inlet.

[0024] Compared with the prior art, the utility model has at least the following beneficial effects:

[0025] 1. The oil net structure of the range hood of the utility model is simple in structure and can effectively solve the problem of poor aerodynamic noise performance caused by flow separation after the airflow passes through the oil net.

[0026] 2. The range hood of the utility model is reasonably designed and can further improve the smoke collection effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a range hood in an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the air guide assembly in the embodiment of the utility model;

[0030] Figure 3 It is an exploded schematic diagram of the air guide assembly in the embodiment of the utility model;

[0031] Figure 4 It is a structural schematic diagram of an active air guide plate and a driven air guide plate in an embodiment of the utility model;

[0032] Figure 5 It is a cross-sectional view of an active air guide plate and a driven air guide plate in an embodiment of the utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of the technical solution for which protection is sought in the present invention.

[0035] Embodiment 1:

[0036] like Figures 1 to 5 As shown, this embodiment provides an oil net structure of a range hood, which is arranged at the air inlet 11 of the range hood body 1 and includes:

[0037] A fixing frame 3, the fixing frame 3 is arranged at the air inlet 11;

[0038] An active air deflector 4, which is movably arranged on the fixing frame 3;

[0039] A plurality of driven air guide plates 5, wherein the plurality of driven air guide plates 5 are respectively arranged on the fixing frame 3 at intervals;

[0040] A driving motor 6, wherein an output end of the driving motor 6 is connected to the active air guide plate 4 so that the driving motor 6 drives the active air guide plate 4 to rotate;

[0041] The synchronization rod 7 is connected to the active air guide plate 4 and the multiple driven air guide plates 5. The active air guide plate 4 drives the multiple driven air guide plates 5 to rotate synchronously through the synchronization rod 7.

[0042] In this embodiment, an air inlet 11 is provided on the range hood body 1 to exhaust the oil smoke generated by cooking, at least one set of air guide components 2 is arranged at the position of the air inlet 11, and a fixing frame 3 of the air guide component 2 is detachably installed at the position of the air inlet 11, and an active air guide plate 4 and a plurality of driven air guide plates 5 are movably arranged on the fixing frame 3, and the active air guide plate 4 and the plurality of driven air guide plates 5 are arranged at intervals, one end of the synchronization rod 7 is connected to the active air guide plate 4, and the other end is respectively connected to the plurality of driven air guide plates 5, due to the driving motor 6 The rotating shaft is connected to the active air guide plate 4 so that the driving motor 6 drives the active air guide plate 4 to rotate a certain angle. The rotation of the active air guide plate 4 drives the synchronization rod 7 to be displaced, so that the synchronization rod 7 drives the driven air guide plate 5 to synchronously rotate a corresponding angle. In this way, the flow channel of the air inlet 11 can be changed through the coordinated action of the active air guide plate 4 and multiple driven air guide plates 5, so as to guide the oil smoke and thus improve the smoke collection effect of the range hood. Its structure is simple, and can effectively solve the problem of poor aerodynamic noise performance caused by flow separation after the airflow passes through the oil net.

[0043] Furthermore, the cross-sections of the active air guide plate 4 and the driven air guide plate 5 are airfoil-shaped.

[0044] Preferably, the thickness of the active air guide plate 4 and the driven air guide plate 5 gradually decreases along the air intake direction.

[0045] In the present embodiment, since the cross-sections of the active air guide plate 4 and the driven air guide plate 5 are airfoil-shaped, better aerodynamic noise performance is ensured and better flow guiding effect is obtained, and the thicknesses of the active air guide plate 4 and the driven air guide plate 5 gradually decrease along the air intake direction, that is, the active air guide plate 4 and the driven air guide plate 5 have a structure with a large front end and a small rear end. More preferably, the front ends of the active air guide plate 4 and the driven air guide plate 5 are arc transitions, and at the same time, the rear ends of the active air guide plate 4 and the driven air guide plate 5 are inverted cones. Within a certain range of airflow angles, the airflow passing over the surfaces of the active air guide plate 4 and the driven air guide plate 5 will not or rarely produce airflow separation, thereby effectively reducing flow losses while improving aerodynamic noise performance.

[0046] Preferably, the swing range of the active air guide plate 4 and the driven air guide plate 5 is from -45° to 45°.

[0047] In the present embodiment, the swing range of the active air guide plate 4 and the driven air guide plate 5 is -45° to 45°, and more preferably, the swing range of the active air guide plate 4 and the driven air guide plate 5 is -30° to 30°, so that the airflow angle of the active air guide plate 4 and the driven air guide plate 5 does not cause airflow separation within the swing range. In this way, by controlling the angle between the longitudinal line of the air guide plate and the axial surface of the fan under different operating conditions, the smoke can have a suitable airflow angle relative to the active air guide plate 4 and the driven air guide plate 5. At the same time, due to the change of the flow channel, the incoming flow of oil smoke can be guided, thereby improving the smoke collection effect of the range hood.

[0048] Furthermore, a protruding rod 8 is protruded outwardly from the lower end of the active air guide plate 4 and the driven air guide plate 5, and a connecting rod 81 is provided at the end of the protruding rod 8. The synchronization rod 7 is respectively connected to multiple connecting rods 81 to synchronize the rotation of the active air guide plate 4 and the driven air guide plate 5.

[0049] In particular, a plurality of through holes 71 are provided at intervals on the synchronization rod 7 , and a buckle portion 82 is provided at one end of the connecting rod 81 away from the protruding rod 8 . The buckle portion 82 passes through the through hole 71 to buckle the synchronization rod 7 and the connecting rod 81 together.

[0050] In this embodiment, a protruding rod 8 is protruded outward from the lower end of the active air guide plate 4 and the driven air guide plate 5, and a connecting rod 81 is provided at the end of the protruding rod 8, that is, the fixed end of each protruding rod 8 is connected to the lower end of the active air guide plate 4 and the driven air guide plate 5, and a connecting rod 81 is protruded downward from its free end. The connecting rod 81 is provided with a buckle portion 82 at one end away from the protruding rod 8, and a plurality of through holes 71 are spaced apart on the synchronization rod 7. After the buckle portion 82 passes through the through hole 71, the synchronization rod 7 and the connecting rod 81 are buckled together, so that the rotation of the active air guide plate 4 and the driven air guide plate 5 can be achieved synchronously, and further, the active air guide plate 4 and the driven air guide plate 5 do not interfere with each other in motion during the rotation process. More preferably, a plurality of fixing holes are provided at intervals at the upper and lower ends of the fixing frame 3, and the upper and lower ends of the active air guide plate 4 and the driven air guide plate 5 are connected to the corresponding fixing holes, so that the active air guide plate 4 and the driven air guide plate 5 can be rotatably arranged on the fixing frame 3, and a groove is provided at the lower end position of the fixing frame 3, and the lower ends of the active air guide plate 4 and the driven air guide plate 5 are connected by the synchronization rod 7 after passing through the fixing holes of the lower end wall of the fixing frame 3. Since the synchronization rod 7 is embedded in the groove at the lower end of the fixing frame 3, the visual perception of the product appearance is effectively improved.

[0051] Embodiment 2:

[0052] like Figures 1 to 5 As shown, this embodiment provides a range hood, including a range hood body 1 and at least one set of oil net structures of the range hood as described in any one of the first embodiments, an air inlet 11 is opened on the range hood body 1, and the oil net structure is arranged at the air inlet 11.

[0053] In this embodiment, an oil net structure as described in any one of the first embodiments is provided at the air inlet position of the range hood body 1, so that the fixing frame 3 of the air guide assembly 2 can be detachably installed at the air inlet 11 position, and an active air guide plate 4 and a plurality of driven air guide plates 5 are movably provided on the fixing frame 3, one end of the synchronization rod 7 is connected to the active air guide plate 4, and the other end is respectively connected to the plurality of driven air guide plates 5, and the driving motor 6 drives the active air guide plate 4 to rotate a certain angle, and the rotation of the active air guide plate 4 drives the synchronization rod 7 to move, so that the synchronization rod 7 drives the driven air guide plate 5 to synchronously rotate a corresponding angle, so that the flow channel of the air inlet 11 can be changed through the coordinated action of the active air guide plate 4 and the plurality of driven air guide plates 5, so as to guide the oil smoke, thereby improving the smoke collection effect of the range hood, and at the same time, it can also effectively solve the problem of poor aerodynamic noise performance caused by flow separation after the airflow passes through the oil net.

[0054] Furthermore, a smoke sensor is included, and the smoke sensor is respectively arranged on the left and right ends of the air inlet 11.

[0055] In this embodiment, smoke sensors are respectively arranged on the left and right ends of the air inlet 11 to monitor the oil fume concentration on the left and right ends of the air inlet 11, so as to obtain the current position and / or concentration of the oil fume, and then control the action of the air guide component 2 according to the obtained oil fume situation. In this way, the problem of poor smoke collection effect caused by the inability of the existing oil net to automatically match the usage scenario can be solved or improved.

[0056] Furthermore, when the number of the oil net structures is two or more, each group of oil net structures is sequentially arranged at the air inlet 11 along the transverse direction.

[0057] In this embodiment, when the number of oil mesh structures is two or more, each group of oil mesh structures is arranged in sequence along the lateral direction at the air inlet 11, so that the action of each group of oil mesh structures is controlled according to the oil smoke situation to achieve a better smoke collection effect.

[0058] Specifically, when the number of the air guide components 2 is two, the two groups of air guide components 2 are symmetrically arranged on the left and right ends of the fixing frame 3 .

[0059] In the present embodiment, when there are two groups of air guide components 2, the two groups of air guide components 2 are symmetrically arranged on the left and right ends of the fixing frame 3, so that a group of air guide components 2 are respectively arranged on the left and right ends of the air inlet 11. When it is detected that the smoke source of the oil smoke is located on the left side of the air inlet 11, the air guide component 2 at the left end of the air inlet 11 is controlled to rotate left as a whole to facilitate the collection of the oil smoke on the left side; when it is detected that the smoke source of the oil smoke is located on the right side of the air inlet 11, the air guide component 2 at the right end of the air inlet 11 is controlled to rotate right as a whole to facilitate the collection of the oil smoke on the right side; when it is detected that the smoke source of the oil smoke is located on the left and right sides of the air inlet 11 respectively, the air guide component 2 at the left end of the air inlet 11 rotates left to facilitate the collection of the oil smoke on the left side, and at the same time, the air guide component 2 at the right end of the air inlet 11 rotates right to facilitate the collection of the oil smoke on the right side. More preferably, when oil smoke is generated on both sides of the air inlet 11, if it is detected that the oil smoke concentration on the left side of the air inlet 11 is greater than that on the right side, then the air guide assembly 2 at the left end of the air inlet 11 is controlled to rotate to the left, and the air guide assembly 2 at the right end of the air inlet 11 is controlled not to rotate, thereby helping to improve the smoke collection effect; if it is detected that the oil smoke concentration on the right side of the air inlet 11 is greater than that on the left side, then the air guide assembly 2 at the right end of the air inlet 11 is controlled to rotate to the right, and the air guide assembly 2 at the left end of the air inlet 11 is controlled not to rotate, thereby helping to improve the smoke collection effect.

[0060] Preferably, when the number of the air guide components 2 is three, the three groups of air guide components 2 are sequentially arranged on the fixing frame 3 along the transverse direction.

[0061] In this embodiment, when there are three groups of air guide components 2, the three groups of air guide components 2 are sequentially arranged on the fixing frame 3 along the transverse direction, so that one group of air guide components 2 is respectively arranged on the left end, the middle position and the right end of the air inlet 11. When it is detected that the smoke source of the oil smoke is located on the left side of the air inlet 11, the air guide component 2 on the left end of the air inlet 11 is controlled to rotate to the left as a whole to facilitate the collection of the oil smoke on the left side; when it is detected that the smoke source of the oil smoke is located on the right side of the air inlet 11, the air guide component 2 on the left end of the air inlet 11 is controlled to rotate to the left as a whole to facilitate the collection of the oil smoke on the left side; When the smoke sources of the oil smoke are detected to be located on the left and right sides of the air inlet 11, the air guide assembly 2 at the left end of the air inlet 11 rotates to the left to facilitate the collection of the oil smoke on the left side, and at the same time, the air guide assembly 2 at the right end of the air inlet 11 rotates to the right to facilitate the collection of the oil smoke on the right side, and the air guide assembly 2 at the middle position of the air inlet 11 does not rotate. More preferably, when oil smoke is generated on both sides of the air inlet 11, if it is detected that the oil smoke concentration on the left side of the air inlet 11 is greater than that on the right side, then the air guide assembly 2 at the left end of the air inlet 11 and the middle position of the air inlet 11 is controlled to rotate to the left, and the air guide assembly 2 at the right end of the air inlet 11 is controlled not to rotate, thereby helping to improve the smoke collection effect; if it is detected that the oil smoke concentration on the right side of the air inlet 11 is greater than that on the left side, then the air guide assembly 2 at the right end of the air inlet 11 and the middle position of the air inlet 11 is controlled to rotate to the right, and the air guide assembly 2 at the left end of the air inlet 11 is controlled not to rotate, thereby helping to improve the smoke collection effect.

[0062] Furthermore, it also includes a fan, which is arranged in the range hood body 1, and the longitudinal lines of the active air guide plate 4 and the driven air guide plate 5 are perpendicular to the axial plane of the fan.

[0063] In this embodiment, a fan is provided in the range hood body 1. When the range hood body 1 is in standby state, the longitudinal lines of the active air guide plate 4 and the driven air guide plate 5 are perpendicular to the axial plane of the fan. The flow path of the oil fume is changed by controlling the left and right swing of the active air guide plate 4 and the driven air guide plate 5, thereby guiding the incoming flow of the oil fume, thereby improving the smoke collection effect of the range hood.

[0064] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An oil net structure of a range hood, arranged at an air inlet (11) of a range hood body (1), characterized in that: include: A fixing frame (3), the fixing frame (3) being arranged at the air inlet (11); An active air deflector (4), the active air deflector (4) being movably arranged on the fixing frame (3); A plurality of driven air guide plates (5), wherein the plurality of driven air guide plates (5) are respectively arranged at intervals on the fixing frame (3); A driving motor (6), wherein an output end of the driving motor (6) is connected to the active air guide plate (4) so ​​that the driving motor (6) drives the active air guide plate (4) to rotate; A synchronization rod (7), wherein the synchronization rod (7) is connected to the active air guide plate (4) and the plurality of driven air guide plates (5), and the active air guide plate (4) drives the plurality of driven air guide plates (5) to rotate synchronously via the synchronization rod (7).

2. The oil net structure of a range hood according to claim 1, characterized in that: The cross sections of the active air guide plate (4) and the driven air guide plate (5) are airfoil-shaped.

3. The oil net structure of a range hood according to claim 2, characterized in that: The thickness of the active air guide plate (4) and the driven air guide plate (5) gradually decreases along the air intake direction.

4. The oil net structure of a range hood according to any one of claims 1 to 3, characterized in that: The swing range of the active air guide plate (4) and the driven air guide plate (5) is from -45° to 45°.

5. The oil net structure of a range hood according to claim 1, characterized in that: A protruding rod (8) is provided at the lower end of the active air guide plate (4) and the driven air guide plate (5) to protrude outward, a connecting rod (81) is provided at the end of the protruding rod (8), and the synchronization rod (7) is respectively connected to a plurality of the connecting rods (81) to synchronize the rotation of the active air guide plate (4) and the driven air guide plate (5).

6. The oil net structure of a range hood according to claim 5, characterized in that: A plurality of through holes (71) are provided at intervals on the synchronization rod (7); a buckle portion (82) is provided on the end of the connection rod (81) away from the protruding rod (8); and the buckle portion (82) passes through the through hole (71) to buckle the synchronization rod (7) and the connection rod (81) together.

7. A range hood, characterized in that: The invention comprises a range hood body (1) and at least one set of oil net structures of a range hood according to any one of claims 1 to 6, wherein an air inlet (11) is provided on the range hood body (1), and the oil net structure is arranged at the air inlet (11).

8. The range hood according to claim 7, characterized in that: When the number of the oil net structures is two or more, each group of the oil net structures is arranged in sequence along the transverse direction at the air inlet (11).

9. The range hood according to claim 7, characterized in that: It also comprises a fan, which is arranged in the range hood body (1), and the longitudinal lines of the active air guide plate (4) and the driven air guide plate (5) are perpendicular to the axial plane of the fan.

10. A range hood according to any one of claims 7 to 9, characterized in that: It also comprises a smoke sensor, which is respectively arranged on the left and right ends of the air inlet (11).

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