Range hood and motor bracket thereof

Abstract

The present invention relates to the technical field of daily electrical appliances, and specifically to a range hood and its motor bracket. The motor bracket includes a fixing portion and a plurality of legs, wherein the fixing portion is an annular structure, and the fixing portion has a motor fixing hole, and the motor fixing hole is used to fix the motor; at least one of the legs includes a mounting section and a diversion avoidance section, and the mounting section is used to be fixedly connected to the volute; the diversion avoidance section is a flat plate structure, and the angle between the plane where the diversion avoidance section is located and the axial direction of the motor fixing hole is α, 0°<α<90°, and the opposite ends of the diversion avoidance section are fixedly connected to the mounting section and the fixing portion respectively. While achieving the purpose of fixing the motor, the motor bracket provided by the present invention has a small resistance and blocking area to the gas, the noise generated by the gas is small, and the air intake is large.

Description

Technical Field

[0001] The invention relates to the technical field of daily electrical appliances, and in particular to a range hood and a motor bracket thereof. Background Art

[0002] With the gradual improvement of living standards, appliances such as range hoods have entered thousands of households. During the assembly process of the range hood, the motor is installed on the motor bracket, which is fastened to the panel on one side of the volute, and the motor drives the wind wheel to rotate. In order to ensure that the range hood has a higher air intake, the left and right double-sided air intake method is usually adopted. In this case, the motor needs to be installed on one side with the help of the motor bracket. The existing motor bracket generally has three to four legs, which are distributed around the fan air inlet or symmetrically distributed on the upper and lower sides of the volute. In order to facilitate processing and assembly, the legs of the motor bracket are parallel to the air inlet surface, which will cause the legs to have a certain obstruction effect on the entry of gas, increase the air intake resistance and noise, and reduce the air intake. Summary of the invention

[0003] (I) The technical problem to be solved by the present invention is that the legs of the current motor bracket are parallel to the air inlet surface, the air inlet resistance and noise are large, and the air inlet volume is small.

[0004] (II) Technical solution

[0005] In order to achieve the above technical problem, the present invention provides a motor bracket for a range hood, which comprises: a fixing portion, the fixing portion is an annular structure, and the fixing portion has a motor fixing hole, and the motor fixing hole is used to fix the motor;

[0006] A plurality of supporting legs, at least one of which comprises a mounting section and a flow diversion avoidance section, wherein the mounting section is used for being fixedly connected to the volute; the flow diversion avoidance section is a flat plate-like structure, and the angle between the plane where the flow diversion avoidance section is located and the axial direction of the motor fixing hole is α, 0°<α<90°, and the opposite ends of the flow diversion avoidance section are fixedly connected to the mounting section and the fixing portion respectively.

[0007] Optionally, 0°<α<30°

[0008] Optionally, the plurality of motor brackets are evenly distributed along the circumference of the motor fixing hole.

[0009] Optionally, the fixing portion is integrally formed with the plurality of supporting legs.

[0010] Optionally, the edge of the diversion and avoidance section is configured as an arc-shaped drag reduction structure.

[0011] Optionally, the plane where the diversion avoidance section is located intersects with the plane where the windward surface of the fixing portion is located, forming an obtuse angle side and an acute angle side; and the installation section is located on the obtuse angle side.

[0012] Optionally, the fixing portion includes a support ring and an air guide ring, the support ring has the motor fixing hole, and the support ring has a windward surface; the air guide ring is connected to the outer periphery of the support ring, and the air guide ring is tilted away from the windward surface.

[0013] Optionally, the air guide ring is a curved structure, and the air guide ring protrudes in a direction away from the motor fixing hole.

[0014] The second aspect of the present invention further provides a range hood, which includes a volute, a fan blade, a motor and a motor bracket, wherein the fan blade is arranged in the volute, and the motor is installed on the volute through the motor bracket and connected to the fan blade.

[0015] Optionally, along the axial direction of the motor fixing hole, the fan blade is centrally arranged relative to the volute.

[0016] (III) Beneficial effects

[0017] The motor bracket provided by the present invention can be applied to a range hood to mount the motor on a volute. The motor bracket includes a fixing portion and a plurality of legs, the motor is fixedly mounted in the motor fixing hole of the fixing portion, the plurality of legs are connected to the fixing portion, and the mounting section of the legs is connected to the volute, thereby mounting the entire motor bracket on the volute; and the flow diversion and avoidance section of the legs is a flat plate-like structure, the angle between the plane where the legs are located and the axial direction of the motor fixing hole (that is, the main airflow movement direction) is α, by setting 0°<α<90°, the resistance to airflow movement caused by the existence of the legs can be effectively reduced, thereby reducing the noise generated by the friction between the gas and the legs to a certain extent; at the same time, the legs of the same size use the above-mentioned installation method to block a smaller area of ​​airflow, thereby increasing the air intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The advantages of the above and / or additional aspects of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a motor bracket provided in an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a partial structure of a range hood provided by an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a part of the structure of the range hood provided by an embodiment of the present invention in another direction;

[0022] Figure 4 It is a schematic diagram of the internal structure of a part of the structure of the range hood provided by an embodiment of the present invention.

[0023] Reference numerals

[0024] 1-Fixed part;

[0025] 11- support ring;

[0026] 111-motor fixing hole;

[0027] 12- air guide ring;

[0028] 2- Legs;

[0029] 21-installation section;

[0030] 22- diversion and avoidance section;

[0031] 3-Snail case;

[0032] 4- Wind blades;

[0033] 5- Motor. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] like Figure 1 and Figure 2As shown, the present invention provides a motor bracket, which can be used in a range hood to fix the motor 5 on the volute 3 of the range hood. The motor bracket includes a fixing portion 1 and a plurality of legs 2. The fixing portion 1 is an annular structure, and the fixing portion 1 has a motor fixing hole 111. During the installation of the motor 5, the motor 5 can be installed at the motor fixing hole 111, and in order to ensure a high connection reliability between the motor 5 and the motor bracket, the motor 5 can also be fixedly connected to the fixing portion 1 by a connecting member such as a screw; the plurality of legs 2 are all fixedly connected to the fixing portion 1, and at least one leg 2 includes a mounting section 21 and a diversion avoidance section 22. The diversion avoidance section 22 is a flat plate structure, and the opposite ends of the diversion avoidance section 22 are respectively fixedly connected to the mounting section 21 and the fixing portion 1, so that during the assembly process, the entire motor bracket can be fixedly connected to the volute 3 with the help of the mounting section 21; the angle between the plane where the diversion avoidance section 22 is located and the axial direction of the motor fixing hole 111 is α, and in order to reduce the resistance formed between the motor bracket and the flowing gas, 0°<α <90°, that is, in the process of forming the motor bracket, the guide avoidance section 22 is formed with the axial direction of the motor fixing hole 111 to form a relatively inclined position relationship; and, a relatively inclined position relationship is also formed between the guide avoidance section 22 and the windward surface of the fixing portion 1. Since during the rotation of the fan blade, part of the gas flows along the axial direction of the motor fixing hole 111, and part of the gas flows along the circumferential direction of the motor fixing hole 111, the above structure can maximize the air intake. Specifically, on the one hand, the effective obstruction area of ​​the entire motor bracket in the air intake direction can be reduced, thereby reducing the resistance between the motor bracket and the gas; on the other hand, the inclined guide avoidance section 22 can also provide a certain guiding effect for the flow of the gas, which can further reduce the resistance between the motor bracket and the gas, and then reduce the noise generated by the friction between the motor bracket and the gas; at the same time, the air intake per unit time can also be increased.

[0036] Specifically, the number of the legs 2 can be three, four or more, and the fixing part 1 and the legs 2 can be made of hard materials such as metal to ensure that both have high structural strength, and the two can be fixedly connected by welding, riveting or threaded assembly connection; preferably, the fixing part 1 and the multiple legs 2 can be formed by the same material in an integrally formed manner, which can further ensure that the fixing part 1 and the legs 2 have high connection reliability, and can reduce the production difficulty of the entire motor bracket to a certain extent, and improve production efficiency; the multiple legs 2 can be respectively arranged on the upper and lower sides of the motor fixing hole 111, so as to provide better support and pulling force for the motor 5 at the same time, and ensure that the motor 5 can be stably fixed on the motor bracket; preferably, as Figure 1As shown, multiple legs 2 can be evenly distributed on the outside of the fixing portion 1 along the circumference of the motor fixing hole 111, thereby further preventing a large obstruction to the flow of gas due to the small spacing between two or more legs 2, and the even distribution of multiple legs 2 can also ensure that the motor 5 can be stably installed on the motor bracket.

[0037] The fixing portion 1 may be a square or circular annular structure, or may be a heterogeneous annular structure. Preferably, the fixing portion 1 may be a circular annular structure, and the specific size of the motor fixing hole 111 thereof may be determined according to the actual structure of the motor 5. The mounting section 21 and the diversion avoidance section 22 of the support leg 2 may be formed in an integrally formed manner, which may improve the strength and structural stability of the entire support leg 2. A reliable fixed connection relationship may be formed between the mounting section 21 and the volute 3 by means of connectors such as screws, and accordingly, a connecting hole may be provided on the mounting section 21. The specific size of the diversion avoidance section 22 may be determined according to actual factors such as the weight of the motor 5 and the material of the diversion avoidance section 22 itself. While ensuring that the entire motor bracket has a structural strength that meets the requirements, the overall size of the diversion avoidance section 22 may be as small as possible, thereby further reducing the obstruction effect of the diversion avoidance section 22 on the airflow, reducing noise, and increasing the air intake. In the process of designing and producing the motor bracket, those skilled in the art may select the actual size of the angle α between the plane where the diversion avoidance section 22 is located and the axial direction of the motor fixing hole 111 according to actual conditions, so as to minimize the obstruction effect of the motor bracket on the airflow. It should be noted that the planes where the two surfaces of the diversion avoidance section 22 that are opposite to each other along the thickness direction thereof are located can be equivalently regarded as the plane where the diversion avoidance section 22 is located.

[0038] As described above, the motor bracket provided by the present invention can be applied to a range hood to mount the motor 5 on the volute 3. The motor bracket comprises a fixing portion 1 and a plurality of legs 2, the motor 5 is mounted in the motor fixing hole 111 of the fixing portion 1, the plurality of legs 2 are connected to the fixing portion 1, and the mounting section 21 of the legs 2 is connected to the volute 3, thereby mounting the entire motor bracket on the volute 3; and the flow-guiding avoidance section 22 of the legs 2 is a flat plate-shaped structure, and the angle between the plane where the legs are located and the axial direction of the motor fixing hole 111 (i.e., the main direction of movement of the airflow) is α, and by setting 0°<α<90°, the resistance to the movement of the airflow caused by the existence of the legs 2 can be effectively reduced, thereby reducing the size of the noise generated by the friction between the gas and the legs 2 to a certain extent; at the same time, the legs 2 of the same size adopt the above-mentioned installation method to block a smaller area of ​​the airflow, thereby increasing the air intake.

[0039] As described above, during the operation of the range hood, the motor 5 drives the fan blade 4 to rotate, and the rotation of the fan blade 4 causes the gas to flow from one side of the fan blade 4 to the other side. During the movement of the gas, a part of the gas flows in the axial direction of the fan blade 4, and another part of the gas flows in the circumferential direction of the fan blade 4. Usually, the amount of air entering along the aforementioned axial direction is much greater than the amount of air entering along the aforementioned circumferential direction. Therefore, in order to further reduce the obstruction effect of the flow guide avoidance section 22 on the gas flow, preferably, as Figure 3 As shown, 0°<α<30°. In this case, the effective blocking surface area formed by the flow-guiding avoidance section 22 for the gas entering along the axial direction of the motor fixing hole 111 is relatively small, and thus the blocking effect on the gas in the aforementioned part is relatively small, and the improvement of the air intake is relatively large. Although, compared with the air intake along the aforementioned circumferential direction, the air intake along the aforementioned axial direction is larger, due to the smaller effective blocking area of ​​the flow-guiding avoidance section 22, the noise generated is relatively small; at the same time, for the gas entering along the circumferential direction of the motor fixing hole 111 (or the fan blade 4), the flow-guiding avoidance section 22 of this structure has a better guiding effect, which can guide the gas flowing in from the aforementioned direction to enter the interior to the maximum extent; and, compared with the air intake along the aforementioned axial direction, the air intake along the aforementioned circumferential direction is smaller, and thus the noise generated by the friction with the flow-guiding avoidance section 22 is relatively small; in summary, the flow-guiding avoidance section 22 of this structure can maximize the total air intake and effectively reduce the noise generated by the friction between the gas and the motor bracket.

[0040] In other words, Figure 3 As shown, α can also be used to represent the relative position between the flow diversion avoidance section 22 and the fixed part 1. When the flow diversion avoidance section 22 is a flat structure, α can also be the angle between the line between the flow diversion avoidance section 22 and the fixed part 1 and the radial direction of the motor fixing hole 111. When the rotation direction of the flow diversion avoidance section 22 is clockwise, α is a positive angle, and when the rotation direction of the flow diversion avoidance section 22 is counterclockwise, α is a negative angle; preferably, the deflection angle range of α is -30° to 30°. In this case, the setting method of the flow diversion avoidance section 22 is the same as the above embodiment.

[0041] In order to further reduce the noise generated by the friction between the gas and the diversion avoidance section 22, preferably, the edge of the diversion avoidance section 22 can be set to an arc-shaped resistance reduction structure (not shown in the figure), which can reduce the overall size of the diversion avoidance section 22 and increase the air intake; on the other hand, under the action of the arc-shaped resistance reduction structure, it can also provide a guiding effect for the gas flowing through the edge of the diversion avoidance section 22, thereby further increasing the air intake and reducing the noise generated by the friction between the gas and the diversion avoidance section 22. Specifically, the specific size of the arc-shaped resistance reduction structure can be determined according to actual conditions, and its specific parameters such as curvature can be selected according to the inclination degree of the diversion avoidance section 22.

[0042] As described above, when the diversion avoidance section 22 is arranged to be axially inclined relative to the motor fixing hole 111, after the plane where the diversion avoidance section 22 is located intersects with the plane where the windward surface of the fixing portion 1 is located, the angles formed between the two are complementary, and one of the two angles is an acute angle and the other is an obtuse angle; in order to prevent the diversion avoidance section 22 from hindering the insertion and installation of the screws when the mounting section 21 is connected to the volute 3 by mounting parts such as screws, it is preferred that Figure 1 As shown, the installation section 21 can be located at the obtuse angle side, so that the installation of the screw can be ensured not to be affected by the existence of the flow diversion avoidance section 22. In other words, the projection of the flow diversion avoidance section 22 along the axial direction of the motor fixing hole 111 does not overlap with the projection of the installation section 21 in the aforementioned axial direction.

[0043] Furthermore, if Figure 1 and Figure 4 As shown, the fixing part 1 includes a support ring 11 and an air guide ring 12. The support ring 11 has a motor fixing hole 111. The motor 5 is installed on the support ring 11, and the support ring 11 has the above-mentioned windward surface, that is, the surface of the support ring 11 opposite to the wind inlet direction is the windward surface. The gas will inevitably collide with the above-mentioned windward surface during the inflow process, and flow along the windward surface to the edge of the windward surface, and finally flow into the inner side of the motor bracket from the edge of the windward surface. In order to reduce the adverse effect of the gas flowing from the windward surface to the back side of the windward surface on the overall inflow process and the total amount of the gas, the outer periphery of the support ring 11 can be connected with the air guide ring 12, and the air guide ring 12 can be tilted away from the windward surface. Then, under the action of the air guide ring 12, the gas flowing from the windward surface can be effectively guided into the inner side of the motor bracket to prevent the size of the eddy effect from being reduced, thereby further improving the blocking effect of the motor bracket on the gas, reducing the noise generated by the gas flow, and then increasing the air intake.

[0044] Specifically, the support ring 11 can be a planar circular ring structure with a motor fixing hole 111 at the center, and its overall size can be determined according to the actual structure of the motor 5 and the size of the internal cavity of the fan blade 4; the air guide ring 12 can be a truncated cone side structure, and the side with a smaller opening is connected to the support ring 11, thereby providing a certain guiding effect for the windward surface of the support ring 11. Preferably, the two can be formed in an integral molding manner, thereby improving the connection reliability of the two to a certain extent, and ensuring that the entire fixing part 1 can provide the motor 5 with structural strength and stability that meet the requirements.

[0045] In order to further reduce the size of the eddy current generated when the gas flows from the windward surface through the air guide ring 12 to the back side of the fixed part 1, preferably, as Figure 4As shown, the air guide ring 12 can be a curved structure, and the air guide ring 12 protrudes in the direction away from the motor fixing hole 111. In this case, relative to the air guide ring 12 having a straight air guide structure, the air guide ring 12 with a curved structure can further increase the total guiding distance, and further reduce the size of the vortex generated by the gas after leaving the guiding effect of the air guide ring 12, thereby preventing airflow turbulence and improving the stability of the airflow.

[0046] Based on the motor bracket provided in any of the above embodiments, the present invention also provides a range hood, which includes a volute 3, a fan blade 4, a motor 5 and any of the above motor brackets, the fan blade 4 is arranged in the volute 3, the motor 5 is installed on the volute 3 through the motor bracket and is connected to the fan blade 4, and the motor 5 drives the fan blade 4 to rotate.

[0047] In order to further increase the air intake of the range hood, preferably, the fan blade 4 can be centrally arranged relative to the volute 3 along the axial direction of the motor fixing hole 111, so that the air intake areas on both sides of the motor bracket are basically the same, which can further increase the air intake of the entire range hood and thus improve the overall working performance of the range hood.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor bracket for a range hood, used for fixing a motor (5) on a volute (3), characterized in that: include: A fixing portion (1), the fixing portion (1) being an annular structure, and the fixing portion (1) having a motor fixing hole (111), the motor fixing hole (111) being used to fix the motor (5); A plurality of supporting legs (2), at least one of the supporting legs (2) comprising a mounting section (21) and a flow diversion avoidance section (22), the mounting section (21) being used for being fixedly connected to the volute (3); the flow diversion avoidance section (22) being a flat plate structure, and the angle between the plane where the flow diversion avoidance section (22) is located and the axial direction of the motor fixing hole (111) is α, 0°<α<90°, and opposite ends of the flow diversion avoidance section (22) are respectively fixedly connected to both the mounting section (21) and the fixing portion (1); The fixing portion (1) comprises a support ring (11) and an air guide ring (12); the support ring (11) has the motor fixing hole (111), and the support ring (11) has a windward surface; the air guide ring (12) is connected to the outer periphery of the support ring (11), and the air guide ring (12) is arranged to be inclined away from the windward surface; wherein the surface of the support ring (11) opposite to the wind inlet direction is the windward surface; The air guide ring (12) is a curved structure, and the air guide ring (12) protrudes in a direction away from the motor fixing hole (111).

2. The motor bracket according to claim 1, characterized in that: 0°＜α＜30°。 3. The motor bracket according to claim 1, characterized in that: The plurality of motor brackets are evenly distributed along the circumference of the motor fixing hole (111).

4. The motor bracket according to claim 1, characterized in that: The fixing portion (1) and the plurality of supporting legs (2) are integrally formed.

5. The motor bracket according to claim 1, characterized in that: The edge of the flow diversion and avoidance section (22) is configured as an arc-shaped resistance reduction structure.

6. The motor bracket according to claim 1, characterized in that: The plane where the diversion avoidance section (22) is located intersects with the plane where the windward surface of the fixing portion (1) is located, forming an obtuse angle side and an acute angle side, and the installation section (21) is located on the obtuse angle side.

7. A range hood, characterized in that: The invention comprises a volute (3), a fan blade (4), a motor (5), and a motor bracket according to any one of claims 1 to 6, wherein the fan blade (4) is arranged in the volute (3), and the motor (5) is mounted on the volute (3) via the motor bracket and is connected to the fan blade (4).

8. The range hood according to claim 7, characterized in that: Along the axial direction of the motor fixing hole (111), the fan blade (4) is centrally arranged relative to the volute (3).

Images