Motor and household appliance

Abstract

The utility model discloses a motor and a household electrical appliance, and relates to the technical field of motors. The motor comprises a mounting frame, a supporting shaft, a shell, a stator and a rotor, the supporting shaft is arranged to be connected to the mounting frame, the shell is connected with the supporting shaft, the shell and the mounting frame are arranged at intervals, and the stator and the rotor are both arranged in a mounting cavity between the shell and the mounting frame. A first ring groove is formed in the outer side wall of the mounting frame, the shell covers at least part of the structure of the first ring groove, or the end wall of the shell is flush with the side wall of the first ring groove. Before water enters the motor, due to blocking of the shell, the water needs to pass through the first annular groove firstly. The first annular groove is arranged around the rotating axis of the motor, so that water can flow to the lower part of the motor under the diversion of the first annular groove and finally drip to the ground or other positions, the risk that water enters the motor is effectively reduced, the probability that water enters the bearing is reduced, and the waterproof performance of the motor can be improved; and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor and a household appliance. Background Art

[0002] Some external rotor motors have an open structure to facilitate heat dissipation. When the motor is used in an outdoor environment, it is easy for water to enter the motor on rainy days or in the return of the south wind. For example, rainwater enters the motor through the air gap between the rotor and the stator, causing water to enter the bearings. The bearings are prone to rust and lubrication failure, which reduces the service life of the motor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a motor that can improve waterproof performance and increase service life.

[0004] The utility model also provides a household appliance with the motor.

[0005] The motor according to the first embodiment of the utility model includes: a mounting frame;

[0006] A support shaft connected to the mounting frame;

[0007] A housing connected to the support shaft and spaced apart from the mounting frame, wherein a mounting cavity is formed between the housing and the mounting frame;

[0008] A stator, located in the mounting cavity and fixedly connected to the mounting frame;

[0009] A rotor is located in the installation cavity and fixedly connected to the housing, and the rotor is arranged around the stator;

[0010] In which, the outer side wall of the mounting frame is provided with a first annular groove, the first annular groove is arranged around the rotation axis of the motor, and the shell covers at least part of the structure of the first annular groove; or, the first annular groove is exposed in the shell, and the end wall of the shell facing one end of the mounting frame is flush with the side wall of the first annular groove close to the shell side.

[0011] The motor according to the embodiment of the utility model has at least the following beneficial effects:

[0012] A support shaft is provided to be connected to the mounting frame, the housing is connected to the support shaft and is spaced apart from the mounting frame, and the stator is fixed in the mounting cavity formed between the housing and the mounting frame, and the rotor is arranged around the stator and is fixedly connected to the housing, so that the housing can be driven to rotate when the rotor rotates. A first annular groove is provided on the outer wall of the mounting frame, and the housing covers at least part of the structure of the first annular groove, or the end wall of the housing is flush with the side wall of the first annular groove. Before water enters the interior of the motor, it needs to pass through the first annular groove due to the obstruction of the housing. The first annular groove is arranged around the rotation axis of the motor, so that water can flow to the bottom of the motor under the guidance of the first annular groove, and finally be discharged from the motor, thereby effectively reducing the risk of water entering the interior of the motor, reducing the probability of water entering the bearing, and improving the waterproof performance of the motor, thereby improving the reliability and service life of the motor.

[0013] According to some embodiments of the utility model, a second gap is formed between the rotor and the mounting frame along the axial direction of the motor, and the outer wall of the stator is provided with a second annular groove, the second annular groove is arranged around the rotation axis, and the notch of the second annular groove is arranged toward the second gap.

[0014] According to some embodiments of the present invention, along the axial direction of the motor, the minimum width of the second annular groove is W3, which satisfies: 2mm≤W3≤5mm;

[0015] And / or, along the radial direction of the motor, the minimum depth of the second annular groove is H3, satisfying: 2mm≤H3≤5mm.

[0016] According to some embodiments of the utility model, the stator is arranged around the support shaft and is provided with a stator inner hole, the housing includes an outer shell and a sleeve connected to each other, the sleeve is inserted into the stator inner hole, a bearing chamber is formed in the sleeve, the support shaft is passed through the bearing chamber, and the motor also includes at least one bearing, the bearing sleeve is arranged on the support shaft and installed in the bearing chamber.

[0017] According to some embodiments of the present invention, a gap formed between the outer wall of the stator and the inner wall of the rotor, a gap formed between the end wall of the stator facing away from the mounting frame and the inner wall of the outer shell, and a gap formed between the bushing and the inner wall of the stator inner hole are connected in sequence and together constitute a drainage channel, and the outer wall of the bushing is provided with a third annular groove, which is arranged around the rotation axis and is located in the drainage channel.

[0018] According to some embodiments of the utility model, along the axial direction of the motor, the minimum width of the third annular groove is W4, which satisfies: 2mm≤W4≤5mm;

[0019] And / or, along the radial direction of the motor, the minimum depth of the third annular groove is H4, satisfying: 1.5mm≤H4≤3mm.

[0020] According to some embodiments of the present invention, the third annular groove is provided at one end of the shaft sleeve close to the mounting frame.

[0021] According to some embodiments of the present invention, the housing further comprises a sealing cover, which is connected to the shaft sleeve or the outer shell and is used to close an end of the bearing chamber away from the mounting frame.

[0022] According to some embodiments of the utility model, along the axial direction of the motor, the minimum width of the first annular groove is W1, which satisfies: 2mm≤W1≤10mm;

[0023] And / or, along the radial direction of the motor, the minimum depth of the first annular groove is H1, satisfying: 0.5mm≤H1≤5mm.

[0024] According to some embodiments of the utility model, the end wall of the mounting frame located in the housing is the first end wall, and along the axial direction of the motor, the minimum length between the first annular groove and the first end wall is W2, satisfying: W2 ≥ 3 mm;

[0025] And / or, a first gap is formed between the outer wall of the mounting frame and the inner wall of the shell, the first gap is connected to the mounting cavity, and along the radial direction of the motor, the minimum height of the first gap is H2, satisfying: 0.5mm≤H2≤5mm.

[0026] According to some embodiments of the present invention, the shell includes an end plate and an annular portion connected to the edge of the end plate, the annular portion is arranged around the outer side wall of the mounting frame, and the outer diameter of the annular portion gradually decreases in a direction away from the mounting frame.

[0027] According to some embodiments of the present invention, the taper of the outer side wall of the annular portion is between 1:15 and 1:35.

[0028] The household appliance according to the embodiment of the second aspect of the utility model comprises the motor described in the above embodiment.

[0029] The household appliance according to the embodiment of the utility model has at least the following beneficial effects:

[0030] By adopting the motor of the first embodiment, the motor is connected to the mounting frame by setting a support shaft, the housing is connected to the support shaft and is spaced from the mounting frame, and the stator is fixed in the mounting cavity formed between the housing and the mounting frame, and the rotor is arranged around the stator and is fixedly connected to the housing, and can drive the housing to rotate when the rotor rotates. The outer wall of the mounting frame is provided with a first annular groove, and the housing covers at least part of the structure of the first annular groove, or the end wall of the housing is flush with the side wall of the first annular groove. Before water enters the interior of the motor, it needs to pass through the first annular groove due to the obstruction of the housing. The first annular groove is arranged around the rotation axis of the motor, so that water can flow to the bottom of the motor under the guidance of the first annular groove, and finally discharged from the motor, thereby effectively reducing the risk of water entering the interior of the motor, reducing the probability of water entering the bearing, and improving the waterproof performance of the motor, thereby improving the reliability and service life of the motor.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0033] Figure 1 This is a structural cross-sectional view of a motor according to an embodiment of the utility model;

[0034] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0035] Figure 3 It is a sectional view of the motor structure of an embodiment of the utility model.

[0036] Reference numerals:

[0037] Motor 1000;

[0038] Mounting frame 100; first annular groove 110; mating surface 120; support shaft 130; annular sleeve 140; first end wall 150; second end wall 160;

[0039] Housing 200; mounting cavity 210; first gap 220; housing 230; sleeve 240; bearing chamber 241; third annular groove 242; bearing 243; drainage channel 250; sealing cover 260; annular portion 270; end plate 280;

[0040] stator 300; second annular groove 310; stator inner hole 320;

[0041] Rotor 400 ; second gap 410 . DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0044] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0046] Reference Figure 1 and Figure 2As shown, a motor 1000 of an embodiment of the utility model can be used in household appliances such as air conditioners, refrigerators, humidifiers, fans, etc. For example, the motor 1000 is used to drive the axial flow impeller of the air conditioner outdoor unit to rotate. The motor 1000 of the utility model embodiment includes a mounting frame 100, a support shaft 130, a housing 200, a stator 300 and a rotor 400. The mounting frame 100 is used to fix the motor 1000, for example, the motor 1000 is fixedly connected to the mounting plate of the air conditioner outdoor unit. The support shaft 130 is connected to the mounting frame 100, the housing 200 is connected to the support shaft 130 and is spaced from the mounting frame 100, and the support shaft 130 is used to support the housing 200 to determine the relative position between the housing 200 and the mounting frame 100. An installation cavity 210 is formed between the housing 200 and the mounting frame 100, the stator 300 is located in the installation cavity 210 and is fixedly connected to the mounting frame 100, and the rotor 400 is also located in the installation cavity 210 and is fixedly connected to the housing 200. Along the axial direction of the motor 1000, the rotor 400 and the mounting frame 100 are arranged at intervals. The rotor 400 is arranged around the stator 300. Through the cooperation between the rotor 400 and the stator 300, the rotor 400 can drive the housing 200 to rotate. It should be noted that the support shaft 130 can be fixed relative to the housing 200, that is, the housing 200 is rotatably connected to the support shaft 130. As an alternative embodiment, the support shaft 130 can also rotate synchronously with the housing 200. For the convenience of explanation, the subsequent embodiments are all described as an example in which the support shaft 130 is fixed relative to the housing 200.

[0047] The outer wall of the mounting frame 100 is provided with a first annular groove 110, and the first annular groove 110 is arranged around the rotation axis of the motor 1000. The housing 200 covers at least part of the structure of the first annular groove 110, for example, the housing 200 covers part of the notch of the first annular groove 110, or the housing 200 completely covers the first annular groove 110. As an alternative embodiment, the first annular groove 110 is exposed in the housing 200, and the end wall of the housing 200 facing one end of the mounting frame 100 is flush with the side wall of the first annular groove 110 closest to the housing 200. It should be noted that flush means that on the projection plane parallel to the rotation axis of the motor 1000, the contour line of the end wall of the housing 200 facing the mounting frame 100 and the contour line of the side wall of the first annular groove 110 closest to the rotor 400 coincide.

[0048] Before water enters the interior of the motor 1000, it needs to pass through the first annular groove 110 due to the obstruction of the housing 200. Since the first annular groove 110 is arranged around the rotation axis of the motor 1000, the water can flow to the bottom of the motor 1000 under the guidance of the first annular groove 110, and finally be discharged from the motor 1000, thereby effectively reducing the risk of water entering the interior of the motor 1000, reducing the probability of water entering the bearing 243, and improving the waterproof performance of the motor 1000, thereby improving the reliability and service life of the motor 1000.

[0049] Reference Figure 2 As shown, in the embodiment of the utility model, along the axial direction of the motor 1000, the minimum width of the first annular groove 110 is W1, which satisfies: 2mm≤W1≤10mm, for example, the value of W1 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 10mm. When W1 is less than 2mm, that is, the minimum width of the first annular groove 110 is too small, the water flow is difficult to pass through, which easily leads to water flow blockage, weakened diversion effect, and it is difficult to improve the waterproof performance of the motor 1000. When W1 is greater than 10mm, the minimum width of the second annular groove 310 is too large, and a large area needs to be occupied. The mounting frame 100 needs to be extended accordingly, resulting in an increase in the axial size of the motor 1000, which is not conducive to the miniaturization design of the motor 1000. Therefore, by reasonably designing the minimum width W1 of the first annular groove 110 within the range of 2mm to 10mm, the waterproof performance of the motor 1000 can be improved, and the axial size of the motor 1000 can be avoided from being too large to reduce the production cost.

[0050] Continue to refer to Figure 2 As shown, in the embodiment of the utility model, along the radial direction of the motor 1000, the minimum depth of the first annular groove 110 is H1, which satisfies: 0.5mm≤H1≤5mm, for example, the value of H1 can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 4.5mm, 5mm. When H1 is less than 0.5mm, the minimum depth of the first annular groove 110 is too shallow, and the water flow easily overflows the first annular groove 110, resulting in an increased probability of water flow entering the mounting cavity 210, which is not conducive to improving the waterproof performance of the motor 1000. When H1 is greater than 5mm, the minimum depth of the first annular groove 110 is deep, which easily leads to a reduction in the strength of the mounting frame 100. For this reason, it is necessary to increase the radial size of the mounting frame 100, which will cause the radial size of the motor 1000 to increase, which is not conducive to the miniaturization of the motor 1000. Therefore, by reasonably designing the size of H1 to be between 0.5 mm and 5 mm, the waterproof performance of the motor 1000 can be improved while avoiding the radial size of the motor 1000 being too large, which is beneficial to the miniaturization design of the motor 1000.

[0051] Reference Figure 2As shown, in the embodiment of the utility model, the axial ends of the mounting frame 100 are respectively the first end wall 150 and the second end wall 160, the first end wall 150 is located inside the housing 200, and the second end wall 160 is located outside the housing 200. Along the axial direction of the motor 1000, the minimum angle between the side wall of the first annular groove 110 closest to the first end wall 150 and the first end wall 150 is W2, satisfying: W2 ≥ 3mm, for example, the value of W2 can be 3mm, 4mm, 5mm, 6mm, 7mm, 10mm. It should be noted that when W2 is less than 3mm, the distance between the first annular groove 110 and the first end wall 150 is too close, the processing is difficult, and the structural strength of the mounting frame 100 near the first annular groove 110 is low, and it is easy to deform, break and other adverse effects. Therefore, by designing W2 to be greater than or equal to 3mm, it is convenient to process and improve the structural strength and reliability of the mounting frame 100 near the first annular groove 110, and the larger the value of W2, the more conducive it is to hinder the entry of water flow.

[0052] Reference Figure 2 As shown, in the embodiment of the utility model, a first gap 220 is formed between the outer wall of the mounting frame 100 and the inner wall of the housing 200. The first gap 220 is connected to the mounting cavity 210. Along the radial direction of the motor 1000, the minimum height of the first gap 220 is H2, which satisfies: 0.5mm≤H2≤5mm. For example, the value of H2 can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 4.5mm, 5mm. When H2 is less than 0.5mm, the distance between the housing 200 and the mating surface 120 is too close. During the rotation of the housing 200, the housing 200 and the mating surface 120 may contact due to vibration, thereby causing wear and increasing the generation of noise. When H2 is greater than 5mm, the height of the first gap 220 is too large, the probability of water entering the first gap 220 increases, and the waterproof performance of the motor 1000 decreases. Therefore, by reasonably designing the minimum height H2 of the first gap 220 between 0.5 mm and 5 mm, the contact between the shell 200 and the mating surface 120 can be reduced, thereby increasing the service life of the shell 200 and reducing noise generation. At the same time, the probability of water entering the first gap 220 can be reduced, thereby improving the waterproof performance of the motor 1000.

[0053] Reference Figure 2As shown, in the embodiment of the utility model, a second gap 410 is formed between the rotor 400 and the mounting frame 100 along the axial direction of the motor, and a second annular groove 310 is provided on the outer wall of the stator 300, and the second annular groove 310 is arranged around the rotation axis, and the notch of the second annular groove 310 is arranged toward the second gap 410. It can be understood that when the amount of water inflow is too much, the first annular groove 110 cannot completely guide the flow, so that part of the water overflows and enters the installation cavity 210 through the first gap 220, or part of the water enters the installation cavity 210 through the first gap 220 due to sputtering. When the water first enters the installation cavity 210, the water will first enter the second annular groove 310 and flow to the bottom of the motor 1000 under the guidance of the second annular groove 310, preventing the water from continuing to flow to the inside of the motor 1000, so that the water is finally discharged to the outside of the motor 1000. Therefore, the waterproof performance of the motor 1000 can be further improved, and the situation of water contacting the bearing 243 inside the motor 1000 can be effectively reduced, so as to improve the reliability and safety of the motor 1000.

[0054] Reference Figure 2 As shown, in the embodiment of the utility model, along the axial direction of the motor 1000, the minimum width of the second annular groove 310 is W3, which satisfies: 2mm≤W3≤5mm, for example, the value of W3 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm. When W3 is less than 2mm, that is, the minimum width of the second annular groove 310 is small, the flow-conducting capacity of the second annular groove 310 is weakened, and when the water inflow is large, it is easy to overflow the second annular groove 310, resulting in a decrease in the waterproof performance of the motor 1000. When W3 is greater than 5mm, the axial length of the stator 300 needs to be increased, which is not conducive to the miniaturization design of the motor 1000. Therefore, by reasonably designing the size of W3 between 2mm and 5mm, the flow-conducting effect of the second annular groove 310 can be improved to improve the waterproof performance of the motor 1000, and it is conducive to the miniaturization design of the motor 1000.

[0055] Reference Figure 2 As shown, in an embodiment of the utility model, along the radial direction of the motor 1000, the minimum depth of the second annular groove 310 is H3, which satisfies: 2mm≤H3≤5mm, for example, the value of H3 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm. When H3 is less than 2mm, the minimum depth of the second annular groove 310 is too shallow, and the water flow easily overflows the second annular groove 310, resulting in an increased probability of water flow entering the air gap of the motor, which is not conducive to improving the waterproof performance of the motor 1000. When H3 is greater than 5mm, the minimum depth of the second annular groove 310 is deep, which easily leads to a decrease in the performance of the rotor 400. Therefore, by reasonably designing the size of H3 between 2mm and 5mm, the waterproof performance of the motor 1000 can be improved while reducing the impact on the performance of the stator 300.

[0056] Reference Figure 1 As shown, in the embodiment of the utility model, the stator 300 is arranged around the support shaft 130 at intervals, and the stator 300 is provided with a stator inner hole 320, and the housing 200 includes a shell 230 and a sleeve 240, and the sleeve 240 is connected to the shell 230 and inserted into the stator inner hole 320. A bearing chamber 241 is formed in the sleeve 240, and the support shaft 130 is inserted into the bearing chamber 241. The motor 1000 also includes at least one bearing 243, which is sleeved on the support shaft 130 and installed in the bearing chamber 241. For example, two bearings 243 are provided and are spaced in the bearing chamber 241 along the axial direction to improve the stability of the connection of the housing 200. The bearing 243 is used to support the housing 200, and can reduce the friction of the housing 200 when rotating, and improve the smoothness of the rotation of the housing 200. At the same time, the bearing 243 is arranged in the bearing chamber 241, and the sleeve 240 can play a certain waterproof ability, effectively reducing the situation where water directly contacts the bearing 243, so as to improve the safety and reliability of the operation of the bearing 243.

[0057] Continue to refer to Figure 1 As shown, Figure 1 The dotted arrow in the figure indicates the direction of the water flow. In the embodiment of the utility model, the mounting frame 100 includes an annular sleeve 140 arranged toward the housing 200, and the stator 300 is sleeved on the annular sleeve 140. A stator inner hole 320 is formed in the annular sleeve 140. The third gap between the outer wall of the stator 300 and the inner wall of the rotor 400, the fourth gap formed between the end wall of the stator 300 away from the mounting frame 100 and the inner wall of the housing 230, and the fifth gap formed between the shaft sleeve 240 and the inner wall of the annular sleeve 140 are connected in sequence and together constitute the drainage channel 250. When the water flows over the first annular groove 110, enters the second annular groove 310 through the first gap 220, and then enters the drainage channel 250 from the second annular groove 310, it finally flows to the lower end of the housing 200 and is discharged from the motor 1000. Therefore, the protection performance of the bearing 243 can be improved, the rusting caused by water ingress to the bearing 243 can be reduced, and the service life of the bearing 243 can be improved.

[0058] When water flows into the drainage channel 250, in order to reduce the situation where water flows into the bearing chamber 241 from the end wall of the sleeve 240, refer to Figure 1 and Figure 3As shown, in the embodiment of the utility model, the outer wall of the shaft sleeve 240 is provided with a third annular groove 242, the third annular groove 242 is arranged around the rotation axis, and the third annular groove 242 is located in the drainage channel 250. It can be understood that, since the outer wall of the shaft sleeve 240 is provided with the third annular groove 242, the water flow needs to pass through the third annular groove 242 before entering the bearing chamber 241, and the water flow is guided downward by the third annular groove 242 to reduce the probability of the water flow entering the bearing chamber 241, which can improve the protection performance of the bearing 243 and improve the service life of the motor 1000.

[0059] Reference Figure 3 As shown, in the embodiment of the utility model, the third annular groove 242 is provided at one end of the sleeve 240 close to the mounting frame 100. It is understandable that the provision of the third annular groove 242 will result in a reduction in the wall thickness of the sleeve 240. Therefore, in order to reduce the impact on the strength of the sleeve 240, the third annular groove 242 is provided on the side close to the mounting frame 100, where the impact on the matching of the bearing 243 is small, and the overall reliability of the sleeve 240 can be improved. As an alternative embodiment, the third annular groove 242 can also be provided between the two bearings 243, and a suitable solution can be selected according to the actual situation.

[0060] Continue to refer to Figure 3 As shown, in the embodiment of the utility model, along the axial direction of the motor 1000, the minimum width of the third annular groove 242 is W4, which satisfies: 2mm≤W4≤5mm, for example, the value of W4 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm. When W4 is less than 2mm, that is, the minimum width of the third annular groove 242 is small, the flow-conducting ability of the third annular groove 242 is weakened, and when the water inflow is large, it is easy to overflow the third annular groove 242, and the water flow may enter the bearing chamber 241, resulting in a decrease in the waterproof performance of the motor 1000. When W4 is greater than 5mm, the overall strength of the sleeve 240 is reduced, and the reliability of the motor 1000 is reduced. Therefore, by reasonably designing the size of W4 between 2mm and 5mm, the flow-conducting effect of the third annular groove 242 can be improved to improve the waterproof performance of the motor 1000, and ensure that the strength of the sleeve 240 is within a suitable range.

[0061] Continue to refer to Figure 3As shown, in the embodiment of the utility model, along the radial direction of the motor 1000, the minimum depth of the third annular groove 242 is H4, which satisfies: 0.5mm≤H1≤5mm, for example, the value of H4 can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 4.5mm, 5mm. When H4 is less than 0.5mm, the minimum depth of the third annular groove 242 is too shallow, and the water flow easily overflows the third annular groove 242, resulting in an increased probability of water flow entering the bearing chamber 241, and the protective performance of the bearing 243 is reduced. When H4 is greater than 5mm, the minimum depth of the third annular groove 242 is deeper, which easily leads to a reduction in the strength of the shaft sleeve 240. For this reason, it is necessary to increase the radial size of the shaft sleeve 240, which increases the cost. Therefore, by reasonably designing the size of H4 between 0.5mm and 5mm, the waterproof performance of the motor 1000 can be improved, and the radial size of the shaft sleeve 240 can be avoided to be too large, which can reduce the production cost.

[0062] In order to further reduce the probability of water entering the bearing chamber 241, in the embodiment of the utility model, the housing 200 further includes a sealing cover 260, which can be fixedly connected to the housing 230 or to the shaft sleeve 240, thereby sealing the bearing chamber 241. Figure 3 As shown in FIG. 1 , one end of the sleeve 240 connected to the housing 200 protrudes from the outer side of the housing 230, and the sealing cover 260 is connected to the end of the sleeve 240 protruding from the housing 230, and closes the side of the bearing chamber 241 away from the mounting frame 100. Therefore, it is possible to effectively prevent water from entering from the side of the bearing chamber 241 away from the mounting frame 100, thereby improving the waterproof performance of the motor 1000, thereby increasing the service life of the bearing 243.

[0063] Reference Figure 1 As shown, in the embodiment of the present invention, the housing 200 includes an end plate 280 and an annular portion 270, the annular portion 270 is connected to the outer edge of the end plate 280, the annular portion 270 is arranged around the outer side wall of the mounting frame 100, and the outer diameter of the annular portion 270 gradually decreases in the direction away from the mounting frame 100. Therefore, the annular portion 270 can guide the water flow in the direction away from the mounting frame 100, thereby reducing the probability of the water flow entering the inside of the motor 1000, so as to improve the waterproof performance of the motor 1000.

[0064] In an embodiment of the utility model, the taper of the annular portion 270 is between 1:15 and 1:35. For example, the taper of the annular portion 270 may be 1:16, 1:18, 1:19, 1:25, 1:30, etc. It should be noted that the taper of the annular portion 270 includes two end point values ​​of 1:15 and 1:35. The taper refers to the ratio of the diameter difference between the two end faces of the annular portion 270 along the axial direction and the length of the annular portion 270 in the axial direction. When the taper of the annular portion 270 is less than 1:15, the inclination angle of the outer wall of the annular portion 270 is too large, which will squeeze the space of the mounting cavity 210, and the size of the stator 300 and the rotor 400 needs to be reduced, resulting in reduced performance of the motor 1000. When the taper of the annular portion 270 is greater than 1:35, the inclination angle of the outer wall of the annular portion 270 is too small, and it is difficult to play a role in guiding the direction of the water flow. Therefore, by reasonably designing the taper of the outer wall of the annular portion 270, the water flow can be directed away from the mounting frame 100, thereby reducing the chance of water entering the interior of the motor 1000, thereby improving the waterproof performance of the motor 1000 while having little effect on the performance of the motor 1000.

[0065] A household appliance of one embodiment of the utility model comprises the motor 1000 of the above embodiment. The household appliance may be an air conditioner, a refrigerator, a humidifier, a fan, etc. The household appliance of the utility model embodiment adopts the motor 1000 of the above embodiment, the motor 1000 is connected to the mounting frame 100 by setting a support shaft 130, the housing 200 is connected to the support shaft 130 and is spaced from the mounting frame 100, and the stator 300 is fixed in the mounting cavity 210 formed between the housing 200 and the mounting frame 100, the rotor 400 is arranged around the stator 300 and is fixedly connected to the housing 200, and when the rotor 400 rotates, it can drive the housing 200 to rotate. The outer wall of the mounting frame 100 is provided with a first annular groove 110, the housing 200 covers at least part of the structure of the first annular groove 110, or the end wall of the housing 200 is flush with the side wall of the first annular groove 110. Before water enters the interior of the motor 1000, due to the obstruction of the housing 200, the water needs to pass through the first annular groove 110 first. Since the first annular groove 110 is arranged around the rotation axis of the motor 1000, water can flow to the bottom of the motor 1000 under the guidance of the first annular groove 110 and finally be discharged from the motor 1000, thereby effectively reducing the risk of water entering the interior of the motor 1000, improving the waterproof performance of the motor 1000, and further improving the reliability and service life of the motor 1000.

[0066] Since the household appliance adopts all the technical solutions of the motor 1000 of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0067] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A motor, characterized in that include: Mounting frame; A support shaft connected to the mounting frame; A housing connected to the support shaft and spaced apart from the mounting frame, wherein a mounting cavity is formed between the housing and the mounting frame; A stator, located in the mounting cavity and fixedly connected to the mounting frame; A rotor is located in the installation cavity and fixedly connected to the housing, and the rotor is arranged around the stator; In which, the outer side wall of the mounting frame is provided with a first annular groove, the first annular groove is arranged around the rotation axis of the motor, and the shell covers at least part of the structure of the first annular groove; or, the first annular groove is exposed in the shell, and the end wall of the shell facing one end of the mounting frame is flush with the side wall of the first annular groove close to the shell side.

2. The motor according to claim 1, characterized in that: A second gap is formed between the rotor and the mounting frame along the axial direction of the motor, and a second annular groove is provided on the outer side wall of the stator. The second annular groove is arranged around the rotation axis, and the notch of the second annular groove is arranged toward the second gap.

3. The motor according to claim 2, characterized in that: Along the axial direction of the motor, the minimum width of the second annular groove is W3, satisfying: 2mm≤W3≤5mm; And / or, along the radial direction of the motor, the minimum depth of the second annular groove is H3, satisfying: 2mm≤H3≤5mm.

4. The motor according to claim 1, characterized in that: The stator is arranged around the support shaft and is provided with a stator inner hole. The housing includes an outer shell and a sleeve connected to each other. The sleeve is inserted into the stator inner hole. A bearing chamber is formed in the sleeve. The support shaft passes through the bearing chamber. The motor also includes at least one bearing. The bearing sleeve is arranged on the support shaft and installed in the bearing chamber.

5. The motor according to claim 4, characterized in that: The gap formed between the outer wall of the stator and the inner wall of the rotor, the gap formed between the end wall of the stator facing away from the mounting frame and the inner wall of the outer shell, and the gap formed between the bushing and the inner wall of the inner hole of the stator are connected in sequence and together constitute a drainage channel. The outer wall of the bushing is provided with a third annular groove, which is arranged around the rotation axis and is located in the drainage channel.

6. The motor according to claim 5, characterized in that: Along the axial direction of the motor, the minimum width of the third annular groove is W4, which satisfies: 2mm≤W4≤5mm; And / or, along the radial direction of the motor, the minimum depth of the third annular groove is H4, satisfying: 1.5mm≤H4≤3mm.

7. The motor according to claim 5, characterized in that: The third annular groove is arranged at one end of the shaft sleeve close to the mounting frame.

8. The motor according to claim 4, characterized in that: The housing further comprises a sealing cover, which is connected to the shaft sleeve or the housing and is used to close an end of the bearing chamber away from the mounting frame.

9. The motor according to claim 1, characterized in that: Along the axial direction of the motor, the minimum width of the first annular groove is W1, which satisfies: 2mm≤W1≤10mm; And / or, along the radial direction of the motor, the minimum depth of the first annular groove is H1, satisfying: 0.5mm≤H1≤5mm.

10. The motor according to claim 1, characterized in that: The end wall of the mounting frame located in the housing is the first end wall. Along the axial direction of the motor, the minimum length between the first annular groove and the first end wall is W2, satisfying: W2 ≥ 3 mm; And / or, a first gap is formed between the outer wall of the mounting frame and the inner wall of the shell, the first gap is connected to the mounting cavity, and along the radial direction of the motor, the minimum height of the first gap is H2, satisfying: 0.5mm≤H2≤5mm.

11. The motor according to claim 1, characterized in that: The shell includes an end plate and an annular portion connected to the edge of the end plate. The annular portion is arranged around the outer side wall of the mounting frame, and the outer diameter of the annular portion gradually decreases in a direction away from the mounting frame.

12. The motor according to claim 11, characterized in that: The taper of the outer side wall of the annular portion is between 1:15 and 1:

35.

13. A household appliance, characterized in that: Comprising the electric machine as claimed in any one of claims 1 to 12.

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