Motor support, fan and range hood

Abstract

The utility model provides a motor support, a fan and a range hood, and relates to the technical field of fans. The motor support is connected between a motor and an impeller shell, an assembly cavity is formed in the impeller shell in a surrounding mode, the motor is installed in the assembly cavity, the motor support can divide the assembly cavity into a front side space and a rear side space in the thickness direction, and the motor support comprises a bearing part, a flow guide part and a fixing part; the diversion part is connected between the bearing part and the fixing part, the end, away from the diversion part, of the bearing part is connected with a motor, and the end, away from the diversion part, of the fixing part is connected with an impeller shell. The flow guide part is provided with a plurality of flow guide holes arranged at intervals, and each flow guide hole penetrates through the flow guide part and is communicated with the front side space and the rear side space. The diversion part is provided with the diversion hole, and the air flow in the rear space can flow out from the diversion hole and is further communicated with the front space, thereby preventing local air trapping at the rear end of the motor, reducing noise, promoting the air flow to take away the heat of the motor, and improving the heat dissipation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a motor bracket, a fan and a range hood. Background Art

[0002] Range hoods are essential appliances for people to absorb oil fumes during daily cooking, and have become increasingly popular in recent years. The range hood motor itself is relatively heavy, which can easily lead to local concentration of mass. Therefore, the general motor bracket is made relatively wide and thick to provide stable support for the motor. However, this type of bracket also causes chaotic airflow at the rear end and surrounding areas of the motor, causing local air entrapment and aerodynamic noise, and can also easily lead to poor local airflow flow in the motor, affecting heat dissipation. Utility Model Content

[0003] Based on this, it is necessary to provide a motor bracket to allow the airflow at the rear end of the motor to circulate outward, reduce local air entrapment, promote heat dissipation and reduce noise.

[0004] A motor bracket is connected between a motor and an impeller shell, wherein the impeller shell is surrounded by an assembly cavity, the motor is installed in the assembly cavity, and the motor bracket can separate the assembly cavity into a front space and a rear space in the thickness direction of the motor bracket, and the motor bracket comprises a bearing portion, a guide portion and a fixing portion; the guide portion is connected between the bearing portion and the fixing portion, an end of the bearing portion away from the guide portion is used to connect the motor, and an end of the fixing portion away from the guide portion is used to connect to the impeller shell; wherein the guide portion is constructed with a plurality of guide holes arranged at intervals, each of the guide holes is arranged through the guide portion and is connected to the front space and the rear space.

[0005] It is understandable that the motor bracket is assembled on the impeller shell through the fixing part, and provides support to the motor through the bearing part. The guide part is provided with a guide hole so that the airflow in the rear space of the motor can flow out from the guide hole and then communicate with the front space, thereby reducing flow obstruction, improving the smoothness of the airflow, avoiding local air entrapment at the rear end of the motor, reducing the noise caused by air entrapment, and promoting the airflow to take away the heat of the motor, thereby improving the heat dissipation efficiency.

[0006] In one of the embodiments, the bearing portion and the fixing portion are both arranged at an angle to the guide portion, and the angle between the guide portion and the bearing portion is α, and α is between 120° and 150°.

[0007] It can be understood that the guide portion is inclined relative to the bearing portion to form a slope that can guide the airflow and make the airflow flow out from the guide hole during the flow. The angle range between the guide portion and the bearing portion is set so that the guide portion is opposite to the side position of the front space and away from the middle position of the front space, which is conducive to guiding the airflow to the side position and reducing the impact on the impeller structure and motor at the middle position.

[0008] In one embodiment, a plurality of the guide holes are arranged at intervals along a direction from the fixed portion toward the bearing portion, a dimension of each of the guide holes along a direction in which the guide portion extends from the fixed portion toward the bearing portion is b, a dimension of the guide portion extending from the fixed portion toward the bearing portion is B, and b=(10% to 30%)B.

[0009] It can be understood that such a configuration is conducive to the airflow flowing out of the multiple guide holes evenly, and the guide holes have a sufficient size to ensure the guide effect.

[0010] In one embodiment, from the bearing portion to the fixing portion, the distance between the guide hole adjacent to the bearing portion and the bearing portion is L, the length of the guide portion extending from the bearing portion to the fixing portion is T, and L=(8%-35%)T.

[0011] It is understandable that such a configuration can ensure that the motor bracket has sufficient structural strength, and there can also be guide holes near the bearing part for guide flow, which is conducive to the outflow of air gathered in the middle of the rear space.

[0012] In one embodiment, the guide portion is configured as a long strip, and the direction in which the guide portion extends from the bearing portion toward the fixed portion is the length direction of the guide portion; the dimension of each guide hole along the width direction of the guide portion is a, and the width dimension of the guide portion is A, a=(30%~50%)A.

[0013] It is understandable that the long strip has a simple structure and is easy to produce. The diversion effect of the diversion hole is ensured by limiting the size of the diversion hole.

[0014] In one of the embodiments, the guide portion further includes a guide plate, and at least part of the edges of the guide holes are connected with corresponding guide plates, and the guide plates are located on the side of the guide portion along its thickness direction toward the front space, and the guide plates extend in a direction toward the front space and away from the bearing portion.

[0015] It can be understood that the guide plate is provided to further enhance the guide effect on the basis of the guide hole.

[0016] In one of the embodiments, the guide plate is connected to an edge of the guide hole close to the bearing portion, and an angle β between the guide plate and the guide portion in an inclined direction is in a range of 30° to 90°.

[0017] It can be understood that by limiting the included angle between the guide vane and the guide portion, it is ensured that the guide vane guides the airflow into the front space, does not interfere with the structure of the motor, and is not likely to hinder the flow of the fluid.

[0018] In one embodiment, the extension length of the guide plate is h, the dimension of the guide hole along the extension direction of the guide portion from the fixing portion toward the bearing portion is b, and h=(40%-100%)b.

[0019] It is understandable that such an arrangement allows the guide plate to match the size of the guide hole to ensure the guide effect of the guide plate, while also avoiding obstruction of the flow due to the excessive length of the guide plate.

[0020] In one of the embodiments, along the direction from the fixing portion toward the bearing portion, the angle between the guide plate and the guide portion gradually increases.

[0021] It is understandable that the airflow generated by the impeller structure gathers toward the middle, so this arrangement is conducive to adapting to the distribution law of airflow flow and enhancing the diversion effect.

[0022] The present application also provides a fan, which includes an impeller shell, an impeller structure, a motor and the above-mentioned motor bracket; the impeller shell is provided with an assembly cavity; the impeller structure is installed in the assembly cavity; the motor is installed in the assembly cavity and connected to the impeller structure; the above-mentioned motor bracket is installed in the assembly cavity; the bearing part of the motor bracket is equipped with the motor, and the motor bracket can separate the assembly cavity into a front space and a rear space along the thickness direction of the motor bracket.

[0023] It can be understood that the motor can drive the impeller structure to rotate. By setting the above-mentioned motor bracket, the airflow in the rear space of the motor can flow to the front space, thereby reducing local air entrapment, reducing airflow noise, and promoting heat dissipation of the motor.

[0024] The present application also provides a range hood, including the above-mentioned fan, which can reduce usage noise and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A cross-sectional view of an embodiment of a fan provided in the present application;

[0027] Figure 2 A rear view of a partial structure of an embodiment of a fan provided in the present application;

[0028] Figure 3 A three-dimensional diagram of a partial structure of an embodiment of a fan provided in the present application;

[0029] Figure 4 A cross-sectional view of another embodiment of a fan provided in the present application;

[0030] Figure 5 A rear view of a partial structure of another embodiment of the fan provided by the present application;

[0031] Figure 6 A three-dimensional diagram of a partial structure of another embodiment of a fan provided in the present application;

[0032] Figure 7 A schematic structural diagram of an embodiment of a motor bracket in a fan provided in the present application;

[0033] Figure 8 A cross-sectional view of an embodiment of a motor bracket in a fan provided in the present application;

[0034] Fig. 9 A schematic structural diagram of another embodiment of a motor bracket in a fan provided in the present application;

[0035] Fig.10 A cross-sectional view of another embodiment of a motor bracket in a wind turbine provided in the present application.

[0036] Figure numerals: 100, fan; 10, motor bracket; 20, impeller structure; 30, motor; 40, impeller shell; 41, assembly cavity; 411, front space; 412, rear space; 11, bearing part; 12, guide part; 121, guide hole; 122, guide plate; 13, fixing part. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0042] See also Figures 1 to 10The present application provides a motor bracket 10, which is connected between the motor 30 and the impeller shell 40. The impeller shell 40 is surrounded by an assembly cavity 41, and the motor 30 is installed in the assembly cavity 41. The motor bracket 10 can separate the assembly cavity 41 into a front space 411 and a rear space 412 along the thickness direction of the motor bracket 10. The motor bracket 10 includes a bearing portion 11, a guide portion 12 and a fixing portion 13; the guide portion 12 is connected between the bearing portion 11 and the fixing portion 13, and the end of the bearing portion 11 away from the guide portion 12 is used to connect the motor 30, and the end of the fixing portion 13 away from the guide portion 12 is used to connect to the impeller shell 40; wherein the guide portion 12 is constructed with a plurality of guide holes 121 arranged at intervals, and each guide hole 121 is arranged through the guide portion 12 and is connected to the front space 411 and the rear space 412.

[0043] like Figures 1 to 6 It should be added that the motor bracket 10 is used to assemble the motor 30 in the fan 100. The fan 100 includes an impeller shell 40, an impeller structure 20 and a motor 30. The impeller structure 20 is arranged in the impeller shell 40, and the impeller structure 20 and the motor 30 are located in the middle of the assembly cavity 41. The motor 30 provides power for the rotation of the impeller structure 20.

[0044] In this way, the motor bracket 10 is fixed on the impeller shell 40 through the connection between the fixing part 13 and the impeller shell 40, the bearing part 11 can support the motor 30, and the guide part 12 is located between the bearing part 11 and the fixing part 13, so as to guide the airflow in the rear space 412 of the assembly cavity 41, so that the airflow can flow from the guide hole 121 on the guide part 12 to the front space 411, realize the airflow circulation, so that more airflow can be discharged, and the air outlet area is increased. At the same time, the airflow flow resistance is reduced, the local trapped air is reduced, and the airflow is not easy to generate vortexes in the rear space 412, thereby reducing the noise generated by the airflow in the rear space 412. It is also beneficial for the airflow to take away the heat generated by the motor 30 in time, which is beneficial for the heat dissipation of the motor 30 and improves the service life of the motor 30. In addition, the airflow flows from the rear space 412 to the front space 411 in a timely manner, and the oil droplets in the airflow can be discharged in time, reducing the retention of oil droplets in the rear space 412, avoiding oil droplets adhering to the rear end of the motor 30 to affect heat dissipation, which is beneficial to protecting the structure of the motor 30 and promoting the normal operation of the motor 30.

[0045] like Figures 7 to 10 As shown, in an optional embodiment, the bearing portion 11 and the fixing portion 13 are both arranged at an angle with the guide portion 12, so that the motor bracket 10 can adapt to the installation position of the motor 30 relative to the impeller shell 40, and the motor bracket 10 can be assembled between the motor 30 and the impeller shell 40. At the same time, such an arrangement is also conducive to forming a drainage slope, guiding the airflow to flow along the surface of the guide portion 12, and flowing out from the guide hole 121 during the flow process.

[0046] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in a specific embodiment, the bearing portion 11 can be circumferentially arranged on the outer periphery of the motor 30 to adapt to the structure of the motor 30. Along the radial direction of the impeller structure 20, the bearing portion 11 is parallel to the extension direction of the fixing portion 13, and the guide portion 12 is arranged at an angle to the axial direction of the impeller structure 20 to form a stable support structure.

[0047] like Figures 1 to 10 As shown, in a specific embodiment, both sides of the bearing portion 11 along the radial direction of the impeller structure 20 are connected to corresponding guide portions 12, and each guide portion 12 is connected to a fixing portion 13 on one side away from the bearing portion 11. In this way, the motor bracket 10 can be assembled to the impeller structure 20 through the fixing portions 13 on both sides of the bearing portion 11, and the assembly is more stable. At the same time, guide portions 12 are provided on both sides of the bearing portion 11 to increase the guide area and promote airflow outflow.

[0048] like Figure 8 and Fig.10 As shown, in a further embodiment, the angle between the guide portion 12 and the bearing portion 11 is α, and α is between 120° and 150°. Figure 1 and Figure 4 As shown, in the impeller shell 40, the guide portion 12 faces the side wall of the impeller shell 40 in the front space 411, so as to guide the airflow to the area of ​​the front space 411 close to the inner wall of the impeller shell 40, reduce the interference with the airflow generated by the impeller structure 20 in the middle of the assembly cavity 41, reduce turbulence, promote airflow outflow, and also help protect the motor 30, and reduce the impact of oil droplets carried by the airflow in the rear space 412 on the motor 30. Exemplarily, α is set to between 120°, 135° or 150°.

[0049] like Figures 7 to 10 As shown, in some embodiments, a plurality of guide holes 121 are arranged at intervals along the direction from the fixing portion 13 to the carrying portion 11. In this way, the guide portion 12 is provided with guide holes 121 in the structure along the direction from the fixing portion 13 to the carrying portion 11, which can guide the airflow distributed everywhere in the rear space 412 to the front space 411.

[0050] like Figure 8 and Fig.10As shown, in a further embodiment, the dimension of each air guide hole 121 along the direction in which the air guide portion 12 extends from the fixing portion 13 toward the bearing portion 11 is b, and the dimension of the air guide portion 12 extending from the fixing portion 13 toward the bearing portion 11 is B, and b=(10%-30%)B. In this way, along the direction in which the air guide portion 12 extends from the fixing portion 13 toward the bearing portion 11, the air guide hole 121 has a sufficiently large dimension to allow the air flow to flow out of the air guide hole 121 smoothly without affecting the structural strength of the air guide portion 12. Exemplarily, b=10%B, 20%B or 30%B.

[0051] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in a further embodiment, the guide portion 12 is configured as a long strip, and the direction in which the guide portion 12 extends from the load-bearing portion 11 toward the fixing portion 13 is the length direction of the guide portion 12; the dimension of each guide hole 121 along the width direction of the guide portion 12 is a, and the width dimension of the guide portion 12 is A, a=(30%~50%)A.

[0052] Thus, along the width direction of the air guide portion 12, the air guide hole 121 has a sufficiently large size to allow the airflow to flow out smoothly from the air guide hole 121 without affecting the structural strength of the air guide portion 12. For example, a=30%A, 40%A or 50%A.

[0053] like Figure 8 and Fig.10 As shown, in a further embodiment, from the load-bearing portion 11 to the fixing portion 13, the distance between the guide hole 121 adjacent to the load-bearing portion 11 and the load-bearing portion 11 is L, specifically the distance between the edge of the guide hole 121 close to the load-bearing portion 11 and the load-bearing portion 11, and at the same time, the length of the guide portion 12 extending from the load-bearing portion 11 to the fixing portion 13 is T, L = (8% ~ 35%) T. In this way, the guide hole 121 is also provided near the load-bearing portion 11 to guide the flow, which is conducive to the airflow concentrated in the middle of the rear space 412 to be discharged from the guide hole 121, and does not affect the structure of the connection between the load-bearing portion 11 and the guide portion 12, thereby ensuring the structural strength of the motor bracket 10. Exemplarily, L = 8% T, 20% T or 35% T.

[0054] In a specific embodiment, the guide hole 121 can be set to be circular, square or other regular shapes, which are easy to process. This is only used as an example and is not specifically limited.

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, in some embodiments, the air guide portion 12 is only provided with the air guide hole 121 , and its air inlet area is large to adapt to different working conditions, and can be used in various fans 100 .

[0056] like Figure 4 , Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, in other embodiments, the guide portion 12 further includes a guide plate 122, and at least some edges of the guide holes 121 are connected with corresponding guide plates 122, and the guide plates 122 are located on the side of the guide portion 12 facing the front space 411 along its thickness direction, and the guide plates 122 extend in the direction toward the front space 411 and away from the bearing portion 11, that is, the guide plates 122 extend toward the cavity wall of the assembly cavity 41, and such a setting enhances the guiding effect on the airflow, so as to further guide the airflow to the cavity wall of the assembly cavity 41 in the front space 411, and reduce the contact between the airflow and the motor 30, and reduce the interference of the airflow after the guide on the airflow generated by the impeller structure 20. In actual use, different guide plates 122 need to be designed according to different impeller structures 20, and the specific design should be determined according to the actual working conditions.

[0057] like Figure 4 As shown, in a further embodiment, the guide plate 122 is connected to the edge of the guide hole 121 close to the bearing portion 11 to block the airflow from flowing toward the bearing portion 11, further avoiding the contact between the airflow and the motor 30, and reducing the adhesion of oil droplets in the airflow to the motor 30.

[0058] like Fig.10 As shown, in a specific embodiment, the angle β between the guide plate 122 and the guide portion 12 in the inclined direction is in the range of 30° to 90°. In this way, on the basis of promoting the airflow guidance, a large obstruction to the airflow flow is avoided, and the airflow is promoted to flow smoothly. Exemplarily, the angle β between the guide plate 122 and the guide portion 12 in the inclined direction is 30°, 60° or 90°.

[0059] like Fig.10 As shown, in a specific embodiment, the extension length of the guide plate 122 is h, and the dimension of the guide hole 121 along the extension direction of the guide portion 12 from the fixing portion 13 toward the bearing portion 11 is b, and h = (40% to 100%) b. In this way, the size of the guide hole 121 affects the flow rate of the airflow passing through the guide hole 121, and the size of the guide plate 122 can match the size of the guide hole 121 to achieve a sufficient guide effect while avoiding a large obstruction to the airflow and ensuring the smooth flow of the airflow. Exemplarily, h = 40% b, 60% b or 100% b.

[0060] like Fig.10As shown, in a specific embodiment, the angle between the guide plate 122 and the guide portion 12 gradually increases along the direction from the fixing portion 13 to the bearing portion 11. In this way, since the airflow generated by the impeller structure 20 is concentrated in the middle of the assembly cavity 41, this arrangement is adapted to the airflow distribution in the assembly cavity 41, reducing the obstruction to the flow of the middle airflow, and promoting the airflow in the rear space 412 to quickly enter the front space 411 from the guide hole 121.

[0061] like Figures 1 to 6 As shown, the present application also provides a fan 100, which includes an impeller shell 40, an impeller structure 20, a motor 30 and the above-mentioned motor bracket 10; the impeller shell 40 is provided with an assembly cavity 41; the impeller structure 20 is installed in the assembly cavity 41; the motor 30 is installed in the assembly cavity 41 and is connected to the impeller structure 20; the above-mentioned motor bracket 10 is installed in the assembly cavity 41; the bearing portion 11 of the motor bracket 10 is equipped with the motor 30, and the motor bracket 10 can divide the assembly cavity 41 into a front space 411 and a rear space 412 along the thickness direction of the motor bracket 10.

[0062] In this way, by using the above-mentioned motor bracket 10, the airflow in the rear space 412 can flow to the front space 411, avoiding the noise caused by local trapped air and affecting the heat dissipation of the motor 30, thereby extending the overall service life and promoting rapid discharge of airflow.

[0063] The present application also provides a range hood, which includes the above-mentioned fan 100, has low noise during use, oil droplets are not easily attached to the surface of the motor 30 in a short period of time, the motor 30 is not easy to get hot, and the exhaust efficiency is high, so as to promote the efficiency of oil fume removal and enhance the user experience.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A motor bracket, characterized in that: Connected between the motor (30) and the impeller shell (40), the impeller shell (40) is provided with an assembly cavity (41), the motor (30) is installed in the assembly cavity (41), the motor bracket can separate the assembly cavity (41) into a front space (411) and a rear space (412) along the thickness direction of the motor bracket, and the motor bracket comprises: a bearing portion (11), a flow guide portion (12) and a fixing portion (13); The guide portion (12) is connected between the bearing portion (11) and the fixing portion (13); an end of the bearing portion (11) away from the guide portion (12) is used to connect to the motor (30); and an end of the fixing portion (13) away from the guide portion (12) is used to connect to the impeller shell (40); The guide portion (12) is configured with a plurality of guide holes (121) arranged at intervals, and each guide hole (121) is arranged through the guide portion (12) and is connected to the front space (411) and the rear space (412).

2. The motor bracket according to claim 1, characterized in that: The bearing portion (11) and the fixing portion (13) are both arranged at an angle with the flow guiding portion (12); the angle between the flow guiding portion (12) and the bearing portion (11) is α, and α is between 120° and 150°.

3. The motor bracket according to claim 2, characterized in that: The plurality of guide holes (121) are arranged at intervals in a direction from the fixing portion (13) toward the bearing portion (11); the dimension of each guide hole (121) along the direction in which the guide portion (12) extends from the fixing portion (13) toward the bearing portion (11) is b; the dimension of the guide portion (12) extending from the fixing portion (13) toward the bearing portion (11) is B, and b=(10% to 30%) B.

4. The motor bracket according to claim 2, characterized in that: From the bearing portion (11) to the fixing portion (13), the distance between the guide hole (121) adjacent to the bearing portion (11) and the bearing portion (11) is L, and the length of the guide portion (12) extending from the bearing portion (11) to the fixing portion (13) is T, and L=(8% to 35%)T.

5. The motor bracket according to claim 1, characterized in that: The guide portion (12) is configured as a long strip, and the direction in which the guide portion (12) extends from the bearing portion (11) toward the fixing portion (13) is the length direction of the guide portion (12); the dimension of each guide hole (121) along the width direction of the guide portion (12) is a, and the width dimension of the guide portion (12) is A, where a=(30% to 50%)A.

6. The motor bracket according to any one of claims 1 to 5, characterized in that: The guide portion (12) further comprises a guide plate (122), and at least some edges of the guide holes (121) are connected to corresponding guide plates (122). The guide plates (122) are located on a side of the guide portion (12) along its thickness direction facing the front space (411), and the guide plates (122) extend in a direction towards the front space (411) and away from the bearing portion (11).

7. The motor bracket according to claim 6, characterized in that: The guide plate (122) is connected to an edge of the guide hole (121) close to the bearing portion (11), and an angle β between the guide plate (122) and the guide portion (12) in an inclined direction is in a range of 30° to 90°.

8. The motor bracket according to claim 6, characterized in that: The extension length of the guide plate (122) is h, the dimension of the guide hole (121) along the extension direction of the guide portion (12) from the fixing portion (13) toward the bearing portion (11) is b, and h=(40%-100%) b.

9. The motor bracket according to claim 6, characterized in that: Along the direction from the fixing portion (13) toward the bearing portion (11), the angle between the guide plate (122) and the guide portion (12) gradually increases.

10. A fan, characterized in that: include: The impeller housing (40) is provided with an assembly cavity (41); An impeller structure (20) is installed in the assembly cavity (41); A motor (30) is installed in the assembly cavity (41) and connected to the impeller structure (20); The motor bracket according to any one of claims 1 to 9 is installed in the assembly cavity (41); the bearing portion (11) of the motor bracket is equipped with the motor (30), and the motor bracket can separate the assembly cavity (41) into a front space (411) and a rear space (412) along the thickness direction of the motor bracket.

11. A range hood, characterized in that: Including the fan as claimed in claim 10.

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