Motor bracket, and fan and range hood applying motor bracket

Abstract

The utility model discloses a motor support, and a fan and a range hood using the motor support, the motor support comprises an annular inner ring body and mounting support legs, and the mounting support legs extend from the inner ring body to the direction far away from the inner ring body along the radial direction of the inner ring body; the inner ring body is at least provided with a first mounting hole and a second mounting hole, the distance between the first mounting hole and the circle center O of the inner ring body is d1, the distance between the second mounting hole and the circle center O of the inner ring body is d2, and d1 is not equal to d2. Compared with the prior art, the utility model has the advantages that by arranging the mounting holes with different distances from the circle center of the inner ring body, mounting positions different from the motor can be formed, so that various motors with different sizes can be matched at the same time, and the universality is improved.

Description

Technical Field

[0001] The utility model relates to a power device, in particular to a motor bracket, a fan using the motor bracket, and a range hood using the fan. Background Art

[0002] Range hoods have become one of the essential household appliances in modern family kitchens. Centrifugal fans have the characteristics of high pressure and low noise, so currently range hoods generally use centrifugal fan systems as power sources, using high-speed rotating impellers to complete the two functions of work and filtering in the volute. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, sucking the oil smoke under the range hood into the fan, and after being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0003] At present, the motor bracket of the centrifugal fan is roughly divided into two types: one is an annular bracket, including an inner ring body and a mounting foot, as disclosed in the Chinese patent application number 201910544483.4; the second is an independent strip bracket, which is jointly supported by two brackets, as disclosed in the Chinese patent application number 202020823858.9.

[0004] The ring bracket has the advantages of strong stability and relatively horizontal installation plane, but the process is more complicated and the cost is higher; the strip bracket has poor impact resistance and may have greater wind resistance and loud noise during operation. In addition, the above two brackets can generally only install motors of fixed sizes and cannot be universal, so there is still room for improvement. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a motor bracket to improve the versatility in view of the deficiencies in the above-mentioned prior art.

[0006] The second technical problem to be solved by the utility model is to provide a fan using the motor bracket.

[0007] The third technical problem to be solved by the utility model is to provide a range hood using the fan.

[0008] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a motor bracket, comprising an annular inner ring body and a mounting foot, wherein the mounting foot extends from the inner ring body to a direction away from the inner ring body along the radial direction of the inner ring body; characterized in that:

[0009] The inner ring body is provided with at least a first mounting hole and a second mounting hole, the distance between the first mounting hole and the center O of the inner ring body is d1, the distance between the second mounting hole and the center O of the inner ring body is d2, and d1≠d2 is satisfied.

[0010] By setting mounting holes with different spacings from the center of the inner ring body, different mounting positions for the motor can be formed, thereby being able to match motors of multiple different sizes at the same time, thereby improving versatility.

[0011] Furthermore, there are at least two first mounting holes and at least two second mounting holes respectively, and they are evenly spaced apart along the circumference of the inner ring body, thereby ensuring stable mounting and uniform force.

[0012] Further, the mounting foot includes a connecting piece, and the first mounting ear and the second mounting ear are respectively provided at opposite ends of the connecting piece, the first mounting ear is fixed to the inner ring body, the connecting piece has a first side facing the airflow and a second side guiding the airflow, the second side is adjacent to the first side, the area of ​​the first side is S1, the area of ​​the second side is S2, S1<S2, thereby effectively reducing wind resistance, reducing the impact force and noise when the airflow impacts the mounting foot 42

[0013] Preferably, in order to better reduce wind resistance, S1 / S2<1 / 8.

[0014] To further reduce wind resistance, a chamfer is formed at a transition position between the first side surface and the second side surface.

[0015] Furthermore, a protrusion is formed on the second side surface, and the protrusion extends between the two mounting ears. The protrusion is conducive to dividing the incoming air flow and can also increase the strength of the mounting foot.

[0016] Preferably, in order to smoothly divide the airflow and reduce the vortex generated by the impact of the airflow, the surface of the protrusion is an arc surface.

[0017] Preferably, there are four mounting legs and they are evenly spaced along the circumference of the inner ring body, thereby making the mounting stable, the force evenly applied, and facilitating even division of the airflow.

[0018] The first technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a fan, including a volute, an impeller arranged in the volute and a motor for driving the impeller to rotate, the volute including a cover plate, characterized in that: the motor is fixed to the cover plate by the motor bracket as described above.

[0019] Further, in order to reduce the transmission of motor vibration, the motor includes a motor body, a motor shaft and a skirt surrounding the outer periphery of the motor body, and the motor body passes through the inner ring body;

[0020] The fan further comprises a shock-absorbing screw, which passes through the skirt and the first mounting hole or the second mounting hole on the inner ring body, thereby fixing the motor and the motor bracket.

[0021] The second technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a fan, including a volute, an impeller arranged in the volute and a motor for driving the impeller to rotate, the volute including a cover plate, characterized in that: the motor is fixed to the cover plate through the motor bracket as described above, the cover plate is provided with an opening, the inner ring body is located in the space surrounded by the opening, and the second mounting ear of the mounting foot is fixed to the cover plate at a position located on the outer periphery of the edge of the opening.

[0022] To further reduce wind resistance, the space between the edge of the opening and the outer peripheral edge of the inner ring body constitutes an annular effective air inlet area, the area of ​​the effective air inlet area is S3, and satisfies nS1 / S3<1.38%, where n is the number of mounting feet.

[0023] The technical solution adopted by the utility model to solve the third technical problem is: a range hood, characterized in that: the fan as described above is applied.

[0024] Compared with the prior art, the advantages of the utility model are: by setting mounting holes with different spacings from the center of the inner ring body, different mounting positions corresponding to the motor can be formed, thereby being able to match a variety of motors of different sizes at the same time, thereby improving versatility; the mounting legs are designed so that the motor bracket as a whole has better wind resistance and lower noise during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a fan according to an embodiment of the utility model;

[0026] Figure 2 It is a front view of the motor bracket of the embodiment of the utility model;

[0027] Figure 3 It is a three-dimensional structural schematic diagram of a motor bracket according to an embodiment of the utility model;

[0028] Figure 4 A schematic diagram of the mounting feet of the motor bracket according to an embodiment of the utility model;

[0029] Figure 5 A schematic diagram of the installation of a motor bracket and a small-sized motor according to an embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the installation of a motor bracket and a large-size motor according to an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model 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. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] See also Figure 1 to Figure 5 A fan is a centrifugal fan, which includes a volute 1, an impeller 2 arranged in the volute 1, and a motor 3 for driving the impeller 2. The motor 3 is connected to the volute 1 through a motor bracket 4.

[0034] The volute 1 includes two cover plates 11 arranged at intervals and an annular wall 12 arranged between the two cover plates 11, and an air inlet 13 is opened on one of the cover plates 11. The motor 3 includes a motor body 31 and a motor shaft 32. The motor body 31 is fixed to one of the cover plates 11 of the volute 1 (usually the cover plate 11 on the side without air intake or auxiliary air intake) through the motor bracket 4, and the motor shaft 32 is fixed to the impeller 2. An opening 111 is opened on the cover plate 11 for installing the motor 3, and a part of the motor body 31 of the motor 3 and the motor shaft 32 pass through the cover plate 11 and enter the interior of the volute 1. When the impeller 2 is a double air intake impeller, the opening 111 can also be used for air intake.

[0035] The motor bracket 4 is an annular bracket, including an inner ring body 41 and mounting legs 42. The inner ring body 41 is annular, and the power supply body 31 passes through it. In the installed state, it surrounds the outer circumference of the motor body 31. The inner ring body 41 is located in the space surrounded by the opening 111 of the cover plate 11 (a certain position deviation is allowed in the axial direction of the fan). The mounting legs 42 extend from the inner ring body 41 in a direction away from the inner ring body 41, and the extension direction is the radial direction of the inner ring body 41. In this embodiment, there are four mounting legs 42, which are evenly spaced along the circumference of the inner ring body 41.

[0036] To facilitate fixing of the motor 3, at least a first mounting hole 411 and a second mounting hole 412 are provided on the inner ring body 41. The first mounting hole 411 may have one or at least two, such as preferably having four in the present embodiment, which are evenly spaced along the circumference of the inner ring body 41; similarly, the second mounting hole 412 may have one or at least two, such as preferably having four in the present embodiment, which are evenly spaced along the circumference of the inner ring body 41. The distance between the first mounting hole 411 and the center O of the inner ring body 41 is d1, and the distance between the second mounting hole 412 and the center O of the inner ring body 41 is d2, and d1≠d2, such as d1<d2 in the present embodiment. The distance between each mounting hole and the center O here can generally be the distance from the center of each mounting hole to the center O. The first mounting hole 411 and the second mounting hole 412 are preferably threaded holes, which are screwed together by the shock-absorbing screw 5 (see Figure 4 and Figure 5 ) can be fixed to the motor 3 by passing through the first mounting hole 411 or the second mounting hole 412. To facilitate the fixing of the motor 3 and the motor bracket 4, the motor 3 further includes an annular skirt 33 surrounding the outer periphery of the motor body 31. When installed, the skirt 33 and the inner ring body 41 at least partially overlap in the axial direction of the motor 3, so that the shock-absorbing screw 5 can pass through the skirt 33 and the inner ring body 41, thereby fixing the motor 3 and the motor bracket 4.

[0037] The mounting foot 42 includes a connecting member 421, and the two opposite ends of the connecting member 421 are respectively provided with a first mounting ear 422 and a second mounting ear 423, wherein the first mounting ear 422 is fixed to the inner ring body 41, and the second mounting ear 423 is fixed to the cover plate 11 of the volute 1 at a position on the periphery of the edge of the opening 111. The connecting member 421 is a generally plate-shaped member, which has a first side surface 4211 facing the airflow and a second side surface 4212 adjacent to the first side surface 4211, and the airflow enters the volute 1 along the second side surface 4212. In order to effectively reduce wind resistance and reduce the impact force and noise when the airflow hits the mounting foot 42, the area of ​​the first side 4211 is S1, the area of ​​the second side 4212 is S2, and S1<S2, preferably S1 / S2<1 / 8; the space between the edge of the opening 111 on the cover plate 11 and the outer peripheral edge of the inner ring body 41 constitutes an annular effective air inlet area, the area of ​​the effective air inlet area is S3, and nS1 / S3<1.38% is satisfied, where n is the number of mounting feet 42.

[0038] A chamfer 4213 is formed at the transition position between the first side surface 4211 and the second side surface 4212, so that the shape is similar to a semicircle, which further reduces wind resistance and reduces the impact force and noise when the airflow hits the mounting foot 42. On the second side surface 4212, such as the middle position, a preferably arc-shaped protrusion 4214 with a Rho of 0.5 (the surface of the protrusion 4214 is an arc), and the protrusion 4214 extends between the two mounting ears. The protrusion 4214 is conducive to dividing the incoming air flow, and can also increase the strength of the mounting foot 42.

[0039] The four mounting legs 42 divide the airflow on the air inlet side into four parts, destroying the formation of gas vortex and reducing noise. Since the area of ​​the air inlet side of the mounting legs 42 is very small, the impact of the air inlet airflow on the motor bracket 4 will be greatly reduced, and accordingly, the vibration of the motor bracket 4 will be weakened to a certain extent during operation, and the strength of the mounting legs 42 can meet the requirements.

[0040] See also Figure 5 When a motor 3 of a certain size is installed, the shock-absorbing screw 5 passes through the skirt 33 of the motor 3 and the first mounting hole 411 of the inner ring body 41 to fix the motor 3 to the motor bracket 4. Figure 6 , when greater than Figure 5 When the motor 3 of the size shown is installed, the shock-absorbing screw 5 passes through the skirt 33 of the motor 3 and the second mounting hole 412 of the inner ring body 41 to fix the motor 3 to the motor bracket 4. Due to the size limit of the inner ring body 41, the installation size difference of different motors should not be too large. In the above-mentioned installation state of motors 3 of different sizes, the mounting holes not used for installation can be used as vents on the motor bracket 4.

[0041] In the above embodiment, two groups of mounting holes are provided on the inner ring body 41. Alternatively, more groups of mounting holes at different distances from the center O of the inner ring body 41 may be provided to fix motors of various sizes, thereby solving the problem that the motor bracket can only match one motor size.

Claims

1. A motor bracket, comprising an annular inner ring body (41) and a mounting foot (42), wherein the mounting foot (42) extends from the inner ring body (41) in a radial direction of the inner ring body (41) in a direction away from the inner ring body (41); characterized in that: The inner ring body (41) is provided with at least a first mounting hole (411) and a second mounting hole (412); the distance between the first mounting hole (411) and the center O of the inner ring body (41) is d1, the distance between the second mounting hole (412) and the center O of the inner ring body (41) is d2, and d1≠d2 is satisfied.

2. The motor bracket according to claim 1, characterized in that: There are at least two first mounting holes (411) and at least two second mounting holes (412) respectively, and they are evenly spaced and arranged along the circumference of the inner ring body (41).

3. The motor bracket according to claim 1, characterized in that: The mounting foot (42) comprises a connecting piece (421), and the connecting piece (421) is provided with a first mounting ear (422) and a second mounting ear (423) at two opposite ends thereof, the first mounting ear (422) being fixed to the inner ring body (41), the connecting piece (421) having a first side surface (4211) facing the airflow and a second side surface (4212) guiding the airflow, the second side surface (4212) being adjacent to the first side surface (4211), the area of ​​the first side surface (4211) being S1, the area of ​​the second side surface (4212) being S2, and S1<S2.

4. The motor bracket according to claim 3, characterized in that: S1 / S2<1 / 8.

5. The motor bracket according to claim 3, characterized in that: A chamfer (4213) is formed at a transition position between the first side surface (4211) and the second side surface (4212).

6. The motor bracket according to claim 3, characterized in that: A protrusion (4214) is formed on the second side surface (4212), and the protrusion (4214) extends between the two mounting ears.

7. The motor bracket according to claim 6, characterized in that: The surface of the protrusion (4214) is an arc surface.

8. The motor bracket according to any one of claims 1 to 7, characterized in that: There are four mounting legs (42) which are evenly spaced and arranged along the circumference of the inner ring body (41).

9. A fan, comprising a volute (1), an impeller (2) arranged in the volute (1), and a motor (3) for driving the impeller (2) to rotate, wherein the volute (1) comprises a cover plate (11), and is characterized in that: The motor (3) is fixed via a motor bracket and a cover plate (11) according to any one of claims 1 to 8.

10. The fan according to claim 9, characterized in that: The motor (3) comprises a motor body (31), a motor shaft (32), and a skirt (33) surrounding the outer circumference of the motor body (31); the motor body (31) passes through the inner ring body (41); The fan further comprises a shock-absorbing screw (5), wherein the shock-absorbing screw (5) passes through the skirt (33) and the first mounting hole (411) or the second mounting hole (412) on the inner ring body (41), thereby fixing the motor (3) and the motor bracket.

11. A fan, comprising a volute (1), an impeller (2) arranged in the volute (1), and a motor (3) for driving the impeller (2) to rotate, wherein the volute (1) comprises a cover plate (11), and is characterized in that: The motor (3) is fixed to the cover plate (11) by means of a motor bracket as described in any one of claims 3 to 7, the cover plate (11) is provided with an opening (111), the inner ring body (41) is located in a space surrounded by the opening (111), and the second mounting ear (423) of the mounting leg (42) is fixed to the cover plate (11) at a position located at the outer periphery of the edge of the opening (111).

12. The fan according to claim 11, characterized in that: The space between the edge of the opening (111) and the outer peripheral edge of the inner ring body (41) constitutes an annular effective air inlet area, the area of ​​the effective air inlet area is S3, and satisfies nS1 / S3<1.38%, where n is the number of mounting legs (42).

13. A range hood, characterized in that: The invention is applied to the fan as claimed in any one of claims 9 to 12.

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