A range hood

Abstract

The present invention discloses a range hood, comprising a motor and a cage assembly mounted on the output shaft end of the motor, wherein the end cover comprises a bearing cover arranged along the axial direction of the rotating shaft and protruding outward, and a base formed at the bottom of the bearing cover, wherein the outer diameter of the base is adapted to the inner diameter of the through hole of the motor, and a plurality of evenly distributed wing portions are formed at the outer edge of the base and are disposed in the middle and lower part of the end cover and folded outward. The cage assembly comprises a connecting frame for positioning the motor and a cage connected to the output shaft end of the motor, and the connecting frame is formed with a mounting hole adapted to the size of the end cover. The present invention, by adopting an optimized design of the motor structure and combining it with a comprehensive structural arrangement with the connecting frame, achieves a method for improving the range hood air duct system and further enhancing the motor performance, effectively improving the use effect of the range hood and ensuring the performance reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] The motors used in the existing range hood technology field are mostly single-phase asynchronous motors. In actual use, combined with the overall structure of the range hood, the motor performance cannot be effectively improved, and it is difficult to optimize the air duct structure of the range hood, which undoubtedly limits the performance improvement of the overall structure. Summary of the Invention

[0003] The object of the present invention is to provide a range hood to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a range hood, comprising a motor and a cage assembly installed at the output shaft end of the motor, the motor comprising a stator housing and an end cover installed at the end of the stator housing, the central axis of the stator housing being formed with a through hole for assembling a rotor, the end cover comprising a bearing cover arranged along the axial direction of the rotating shaft and protruding outward, and a base formed at the bottom of the bearing cover, the outer diameter of the base being adapted to the inner diameter of the through hole of the motor, and a plurality of evenly distributed wing span portions being arranged in the middle and lower part of the end cover and folded outward are formed at the outer edge of the base, a notch portion is formed between the horizontal surfaces of the plurality of wing span portions, the cage assembly comprising a connecting frame for positioning the motor and a cage connected to the output shaft end of the motor, a mounting hole being formed on the connecting frame being adapted to the size of the end cover, and a ventilation opening located in the area where the notch portion is located is formed at the mounting hole after the end cover is assembled.

[0005] The base is folded outward to form a circumferential edge portion along its edge portion. The circumferential edge portion is arranged in a plumb direction with the axial direction of the rotating shaft, and the wingspan portion is integrally formed with the circumferential edge portion.

[0006] The base is adapted to the aperture size of the through hole, and realizes a fully closed or semi-closed adaptive connection to the through hole through its axial displacement.

[0007] The base realizes a semi-closed adaptive connection with the through hole through circumferential displacement, and a gap for airflow conduction is formed between the base and the stator shell.

[0008] The bearing cover protrudes outward in the axial direction and is connected to the rotating shaft through a bearing at an end thereof.

[0009] The motor is configured as a double-ended shaft structure with both ends symmetrically arranged. The length of the motor's rotating shaft extending from both ends accounts for 40%-50% of the total length of the rotating shaft.

[0010] The wing span portions are evenly distributed in three directions along the circumference of the edging portion, and the notch portions adapted therefor are symmetrical about the central axis of the motor and are formed in three numbers. The notch portions are located at the vents.

[0011] The vents form negative pressure in the cage and the motor after the motor rotates, so as to conduct airflow to the respective interiors.

[0012] As can be seen from the above technical solution, the present invention, by adopting an optimized design of the motor structure and combining it with a comprehensive structural setting of the connecting frame, realizes a method of improving the range hood air duct system and further improving the motor performance, effectively improving the use effect of the range hood and ensuring the performance reliability of the product. The specific beneficial effects are as follows:

[0013] 1: Through the optimized setting of the end cover, the end cover can be adapted to the size of the through hole of the stator housing, thereby realizing the choice of full or semi-enclosed state of the end cover to the stator housing, thereby improving the application range of the motor;

[0014] 2: The arrangement of the wing span portion can effectively reduce the area occupied by the end cover body on the radial surface of the rotating shaft. At the same time, the notch formed between the wing span portions can effectively reserve space and implement airflow, thereby increasing the airflow of the range hood air duct system and effectively improving product performance.

[0015] 3: Under the action of air pressure, the airflow inside the cage and the motor can be drained. During the implementation process, the drainage inside the cage can further improve the range hood's oil fume absorption effect, while the drainage inside the motor can effectively improve its internal heat dissipation effect. Under such conditions, the rotation speed of the motor is further increased, and the product performance is greatly improved. At the same time, the optimized edge structure design can ensure the flow directionality of the airflow during the drainage process, effectively reduce airflow turbulence, and further improve the airflow circulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a partial enlarged view of the present invention;

[0018] Figure 3 This is a schematic diagram of the motor structure of the present invention;

[0019] Figure 4 This is a top view of the end cover of the present invention;

[0020] Figure 5 It is a cross-sectional view of the present invention;

[0021] Figure 6 This is a side view of the connecting frame of the present invention;

[0022] Figure 7 It is a schematic diagram of the principle of the present invention.

[0023] In the figure: 1 cage assembly, 11 cage, 12 connecting frame, 13 mounting hole, 2 motor, 21 end cover, 211 notch portion, 212 wingspan portion, 213 positioning hole, 214 threaded hole, 215 bearing cover, 216 base, 217 edging portion, 22 rotating shaft, 23 stator housing, 3 vent, 4 gap, 5 first negative pressure area, 6 positive pressure area, 7 second negative pressure area. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1-7 For the convenience of explanation and understanding, the specific structure and connection relationship of the range hood shown are described as follows:

[0026] This range hood includes a motor 2 and a cage assembly 1. The cage assembly 1 consists of a cage 11 and a connecting frame 12 located at the end and used to connect the motor 2. At the same time, a mounting hole 13 is provided on the central axis of the connecting frame 12. The mounting hole 13 is used to achieve structural avoidance of the motor 2 and, combined with the end cover 21 of the motor 2, effectively guide the airflow. Specifically, the end cover 21 is adapted to the stator housing 23. The central axis of the stator housing 23 is provided with a through hole for installing the rotor. The arrangement of the end cover 21 allows the motor 2 to have two structural forms. The end cover 21 includes a bearing cover 215 arranged along the axial direction of the rotating shaft 22 and protruding outward, and a base 216 formed on the bottom of the bearing cover 215. During implementation, the base 216 is adapted to either fully enclosed or semi-enclosed the through hole through axial displacement. In order to ensure its adaptation effect, the outer diameter of the base 216 adopted in this embodiment is adapted to the inner diameter of the through hole. Among them, the axial extension of the base 216 may include multiple forms. The first is that a base 216 with different axial depths can be assembled to the through hole to achieve the adaptation of the motor 2 structure with a fully enclosed or semi-enclosed through hole. The second is that an adjustable base 216 structure can be used to achieve the position adjustment of its axial depth. Specifically, it can include that the base 216 is movably connected to the bottom of the end cover 21 and adopts threaded connection and other methods to achieve axial adjustment. This embodiment does not provide a detailed description of its specific connection method; after the axial position can be adjusted, it can be adapted to the fully enclosed or semi-enclosed state inside the motor, and a gap 4 is formed between the base 216 and the through hole. The gap 4 is connected to the interior of the motor 2, and the gap 4 cooperates with the diversion of the end cover 21 to effectively achieve the performance improvement of the motor 2; what needs to be specifically explained is the structural setting of the end cover 21, A base 216 is provided at the bottom of the end cover 21, and a plurality of evenly distributed wing span portions 212 are formed at the outer edge of the base 216, which are placed in the middle and lower part of the end cover 21 and folded outward. The wing span portions 212 are fixed to the stator housing 23 and the connecting frame 12 by bolts respectively. Specifically, a positioning hole 213 is provided at the edge of the wing span portion 212, and the bolts are fixedly connected to the stator housing 23 through the positioning hole 213, and a threaded hole 214 is provided in the middle of the wing span portion 212. The threaded hole 214 is threadedly connected by a bolt and the end thereof is connected to the connecting frame 12 to achieve a fixed connection between the end cover 21 and the cage assembly 1. Since a notch portion 211 is formed between the horizontal surfaces of the plurality of wing span portions 212, when the motor 2 is assembled to the connecting frame 12, the notch portion 211 can be combined with the vent 3 to achieve an airflow diversion effect.

[0027] The principle is as follows Figure 7As shown in the figure, when a gap 4 is formed between the end cover 21 and the stator housing 23, the motor 2 forms a first negative pressure zone 5 inside the interior due to the rotation of the rotor, and is located inside the cage assembly 1. Since the motor 2 drives the impeller in the cage 11 to rotate, a second negative pressure zone 7 is formed in the cage 11. The outside of the cage assembly 1 and the motor 2 is a positive pressure zone 6. Under the action of the pressure difference, the positive pressure zone 6 drives the airflow to flow into the first negative pressure zone 5 and the second negative pressure zone 7 respectively, thereby realizing the diversion effect of the airflow; when the gap between the end cover 21 and the stator housing 23 is full, the gap 4 is formed inside the cage assembly 11. When closed and connected, a second negative pressure zone 7 is formed only inside the cage body 11, and a positive pressure zone 6 is formed outside the cage body assembly 1 and the motor 2. Under the action of the pressure difference, the positive pressure zone 6 drives the airflow to flow into the second negative pressure zone 7 respectively; therefore, this technical means can realize the airflow diversion effect inside the range hood, avoiding the damage of the motor 2 to the oil smoke due to the mixing of the airflow. At the same time, in the semi-closed state, the motor 2 can also greatly reduce its internal temperature by the introduction of airflow, effectively improve the performance of the motor, and further increase the motor speed.

[0028] Furthermore, after the base 216 is folded outward, it is formed with an edging portion 217 axially formed along its edge portion. The edging portion 217 is arranged in a plumb direction with the axial direction of the rotating shaft, and the wingspan portion 212 is integrally formed with the edging portion 217. The edging portion 217 is arranged in a structure. When the airflow is diverted, the airflow in the positive pressure area 6 quickly flows into the first negative pressure area 5 and the second negative pressure area 7. The edging portion 217 arranged in the plumb direction with the axial direction of the rotating shaft can effectively guide the airflow to the first negative pressure area 5, and effectively prevent the airflow in the second negative pressure area 7 from affecting the airflow entering the first negative pressure area 5 due to the turbulence caused by the vibration of the motor 2. It can be understood that the edging portion 217 can not only play a diversion role, but also effectively prevent the airflow in the second negative pressure area 7 from entering the first negative pressure area 5. This edging portion 217 is arranged around the end cover 21, and combined with the airflow introduction in the motor 2, it further improves the use effect of the range hood and the performance of the motor 2.

[0029] Furthermore, the motor 2 is configured as a double-headed shaft structure, and the two ends are symmetrically arranged. The length of the motor's rotating shaft at both ends accounts for 40-50% of the total length of the rotating shaft. Since the bearing covers 215 at both ends are arranged to protrude outward along the rotating shaft, the axial span of the end cover 21 is increased. During the specific implementation process, the rotation stability of the rotating shaft can be effectively improved. The existing motor speed reaches 1300R / min. Through the adaptive adjustment of this shaft length ratio, the motor speed can reach the peak effect of the experimental value of 4000R / min-5000R / min, and at the same time, the noise can be effectively stabilized.

[0030] Furthermore, three wing span portions 212 are evenly distributed circumferentially along the rim portion 217, and three corresponding notches 211 are formed symmetrically about the central axis of the motor 2. The notches 211 are located at the vent 3. It should be noted that the number of wing span portions 212 ensures that the end cover 21 effectively stabilizes the stator housing 23 when it is secured to the end cover 21. This ensures structural strength while minimizing the number of wing span portions 212, effectively increasing the area occupied by the notches 211, further increasing the airflow through the notches 211, and improving the overall performance of the range hood.

[0031] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A range hood comprising a motor and a cage assembly mounted on the output shaft end of the motor, the motor comprising a stator housing and an end cap mounted on the end of the stator housing, the stator housing having a through hole formed in the central axis thereof for assembling a rotor, characterized in that: The end cover includes a bearing cover arranged along the axial direction of the rotating shaft and protruding outward, and a base formed at the bottom of the bearing cover, the outer diameter of the base being adapted to the inner diameter of the through hole of the motor, and a plurality of evenly distributed wing span portions are formed at the outer edge of the base and are placed in the middle and lower part of the end cover and folded outward, and a notch portion is formed between the horizontal surfaces of the plurality of wing span portions; the base is adapted to the aperture size of the through hole, and realizes a fully closed or semi-closed adaptive connection to the through hole through its axial displacement; the base is formed with a circumferentially formed edging portion along its edge after being folded outward, and the edging portion is arranged in a plumb direction with the axial direction of the rotating shaft, and the wing span portion and the edging portion are formed integrally; the base realizes a semi-closed adaptive connection to the through hole through axial displacement, and forms a gap for airflow conduction between the base and the stator housing; The cage assembly includes a connecting frame for positioning the motor and a cage connected to the output shaft end of the motor. The connecting frame is formed with a mounting hole that matches the size of the end cover, and after the end cover is assembled, a ventilation opening is formed at the mounting hole in the area where the notch is located, and the notch is aligned with the ventilation opening.

2. The range hood according to claim 1, characterized in that: The bearing cover protrudes outward in the axial direction and is connected to the rotating shaft through a bearing at an end thereof.

3. The range hood according to claim 1, characterized in that: The motor is configured as a double-ended shaft structure with both ends symmetrically arranged. The length of the motor's rotating shaft extending from both ends accounts for 40%-50% of the total length of the rotating shaft.

4. The range hood according to claim 1, characterized in that: The wing span portions are evenly distributed in three directions along the circumference of the edging portion, and the notch portions adapted therefor are symmetrical about the central axis of the motor and are formed in three numbers. The notch portions are located at the vents.

5. The range hood according to claim 1, characterized in that: The vents form negative pressure in the cage and the motor after the motor rotates, so as to conduct airflow to the respective interiors.

Images