A fan and air conditioner

Abstract

The present application discloses a fan, including a motor and a fan blade assembly matched with the motor, the fan blade assembly including a hub and blades. Among them, a plurality of blades are connected to the hub and are connected and distributed around the hub; a shaft protrusion structure is arranged at the middle position of the hub; the middle position of the shaft protrusion structure is hollow; the inner diameter of the shaft protrusion structure is D2; a groove is provided on the lower end surface of the motor; the inner diameter of the groove is D3; a bearing protrusion located in the groove is provided at the lower end of the motor; the outer diameter of the bearing protrusion is D1; ​​D3>D2>D1; the shaft protrusion structure is embedded in the cavity surrounded by the groove and the bearing protrusion to form a sealing structure. The fan provided by the present application effectively avoids the change of motor load caused by water gathering in the fan blade hub, stabilizes the working performance of the motor, avoids water from entering the motor, plays a role in protecting the motor, and improves the safety and reliability of the motor in the fan; an air conditioner with the fan is also provided.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, in particular to a fan, and also to an air conditioner with the fan. Background Art

[0002] When the fan blades and their motors are outdoors, the motors need to be sealed to prevent water from entering the motors and affecting lubrication, or short-circuiting and damaging the motors. This sealing structure makes the motors complex and even increases the rotational friction resistance, reducing the motor efficiency. When the fan blades and their motors are installed vertically or diagonally upward, water will accumulate inside the fan hub, increasing the mass of the fan blades, changing the motor load, changing the fan operating conditions, affecting the fan performance, and the accumulated water may seep into the motor, affecting reliability and posing a safety hazard.

[0003] Patent document with patent application number CN104251522A discloses a top-outlet air conditioner outdoor unit. From the embodiment thereof, it can be seen that the fan blades are on the upper side of the motor. Since the air conditioner outdoor unit is used outdoors and exposed to rain, water may accumulate in the fan blade hub, and water may enter the motor through the motor shaft, causing damage to the motor; if sealing measures are added, the motor becomes complicated and the manufacturing cost increases.

[0004] Therefore, it is necessary to solve and improve the safety and reliability of the motors disclosed in the patents. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of the prior art, provide a fan with good waterproof performance and reliability, and also provide an air conditioner with the fan.

[0006] In order to achieve the above object, the present invention adopts the following scheme:

[0007] A fan comprises a motor and a fan blade assembly connected to the motor, wherein the fan blade assembly comprises:

[0008] Wheel hub;

[0009] A plurality of blades connected to the hub and distributed around the hub;

[0010] A shaft protrusion structure is provided at the middle position of the hub; the middle position of the shaft protrusion structure is hollow; the inner diameter of the shaft protrusion structure is D2;

[0011] A groove is provided on the lower end surface of the motor; the inner diameter of the groove is D3; a bearing convex portion is provided at the lower end of the motor and is located in the groove; the outer diameter of the bearing convex portion is D1; ​​D3>D2>D1;

[0012] The shaft protrusion structure is embedded in a cavity surrounded by the groove and the bearing protrusion to form a sealing structure.

[0013] Furthermore, the wheel hub comprises a wheel hub side wall and a wheel hub bottom; the lower end of the wheel hub side wall is connected to the wheel hub bottom; the wheel hub bottom is provided with a ventilation portion which is in communication with the upper and lower end surfaces of the wheel hub bottom.

[0014] Furthermore, a first drainage hole is provided on the bottom of the wheel hub, which is connected to the upper and lower end surfaces of the bottom of the wheel hub and is used to drain the accumulated water on the wheel hub.

[0015] Furthermore, there are multiple ventilation parts; there are multiple first drainage holes; the multiple ventilation parts are evenly distributed around the circumference of the crankshaft of the motor; and the multiple first drainage holes are evenly distributed around the circumference of the crankshaft of the motor.

[0016] Furthermore, the diameter of the plurality of first drainage holes distributed circumferentially around the crankshaft of the motor is D5; the diameter of the plurality of ventilation parts distributed circumferentially around the crankshaft of the motor is D6; the inner diameter of the hub side wall is D4; D4>D5>D6; and D5 / D4≥0.6.

[0017] Furthermore, an axle support portion is provided between the wheel hub bottom and the shaft protrusion structure; the axle support portion is provided with a second drainage hole which is connected to the lower end surface of the wheel hub bottom and is used to drain the accumulated water in the shaft protrusion structure.

[0018] Furthermore, a plurality of first reinforcing ribs distributed around the shaft protrusion structure are provided between the wheel hub and the shaft protrusion structure.

[0019] Furthermore, the first reinforcing rib is a curved reinforcing rib formed by extending along the crankshaft of the motor in a clockwise rotation.

[0020] Furthermore, a second reinforcing rib distributed around the motor crankshaft is provided at a middle position of the lower end surface of the hub.

[0021] The present application also discloses an air conditioner, comprising a body, an upper cover and the above-mentioned fan; the fan is arranged in the upper end of the body; the upper cover is arranged at the upper end of the body and is located above the fan.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The fan of the present invention is provided with a shaft protrusion structure on the hub, and a groove and a bearing protrusion are provided on the lower end surface of the motor, wherein the size D3>D2>D1 of the diameters corresponding to the groove, the shaft protrusion structure and the bearing protrusion; the shaft protrusion structure is conveniently embedded in the cavity formed by the groove and the bearing protrusion, and the bearing protrusion is embedded in the hollow position or the upper end of the shaft protrusion structure to form a sealed structure, which effectively avoids the change of motor load caused by water gathering in the fan blade hub, stabilizes the working performance of the motor, avoids water entering the motor, plays a role in protecting the motor, and improves the safety and reliability of the motor in the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Figure 1 It is a cross-sectional schematic diagram of the fan of the present invention.

[0026] Figure 2 It is an exploded perspective view of the fan of the present invention.

[0027] Figure 3 It is a schematic cross-sectional view of a fan blade assembly of the fan of the present invention.

[0028] Figure 4 It is a bottom view schematic diagram of the fan blade assembly of the fan of the present invention.

[0029] Figure 5 It is a schematic top view of a fan blade assembly of the fan of the present invention.

[0030] Figure 6 It is a partial cross-sectional schematic diagram of the air conditioner of the present invention.

[0031] Figure 7 It is a schematic partial cross-sectional view of the air conditioner of the present invention from above.

[0032] The figure includes:

[0033] Fan 10, motor 1, groove 11, bearing protrusion 12, fan blade assembly 2, hub 21, hub side wall 211, hub bottom 212, blade 22, shaft protrusion structure 23, ventilation part 3, first drainage hole 4, shaft support part 5, second drainage hole 6, first reinforcement rib 7, second reinforcement rib 8, body 20, upper cover 30. DETAILED DESCRIPTION

[0034] The present invention is further described in conjunction with the following examples.

[0035] like Figures 1 to 7A fan 10 includes a motor 1 and a fan blade assembly 2 connected to the motor 1, wherein the fan blade assembly 2 includes a hub 21 and blades 22. A plurality of blades 22 are connected to the hub 21 and are connected and distributed around the hub 21; a shaft protrusion structure 23 is arranged at the middle position of the hub 21; the middle position of the shaft protrusion structure 23 is hollow; the inner diameter of the shaft protrusion structure 23 is D2; a groove 11 is provided on the lower end surface of the motor 1; the inner diameter of the groove 11 is D3; a bearing protrusion 12 is provided at the lower end of the motor 1 and is located in the groove 11; the outer diameter of the bearing protrusion 12 is D1; ​​D3>D2>D1; the shaft protrusion structure 23 is embedded in the cavity surrounded by the groove 11 and the bearing protrusion 12 to form a sealing structure.

[0036] The fan 10 is provided with a shaft protrusion structure 23 on the hub 21, and a groove 11 and a bearing protrusion 12 are provided on the lower end surface of the motor 1, wherein the size D3>D2>D1 of the diameters corresponding to the groove 11, the shaft protrusion structure 23 and the bearing protrusion 12; it is convenient to embed the shaft protrusion structure 23 into the cavity formed by the groove 11 and the bearing protrusion 12, and at the same time, the bearing protrusion 12 is embedded in the hollow position or the upper end of the shaft protrusion structure 23 to form a sealed structure, which effectively avoids the load change of the motor 1 caused by water gathering in the fan hub 21, stabilizes the working performance of the motor 1, prevents water from entering the motor 1, plays a role in protecting the motor 1, and improves the safety and reliability of the motor 1 in the fan 10. Among them, the depth of the groove 11 is H1; the height of the shaft protrusion structure 23 is L1; L1>H1, by setting L1 greater than H1, according to needs, the shaft protrusion structure 23 can be set to have enough space to enter the cavity surrounded by the groove 11 and the bearing protrusion 12, so as to form a sealed structure and prevent water from entering the motor 1.

[0037] Furthermore, by limiting the inner diameter of the groove 11 , the inner diameter of the shaft protrusion structure 23 and the outer diameter of the bearing protrusion 12 , the installation and assembly of the motor 1 and the fan blade assembly 2 are facilitated.

[0038] In this specific embodiment, the hub 21 includes a hub side wall 211 and a hub bottom 212; the lower end of the hub side wall 211 is connected to the hub bottom 212; the hub bottom 212 is provided with a ventilation portion 3 connected to the upper and lower end surfaces of the hub bottom 212. By providing the ventilation portion 3 on the hub bottom 212, air circulation is facilitated, heat dissipation between the motor 1 and the fan blade assembly 2 is facilitated, and the stability of the fan 10 is improved.

[0039] The hub bottom 212 is provided with a first drainage hole 4 which is connected to the upper and lower end surfaces of the hub bottom 212 and is used to drain the accumulated water on the hub 21. Providing the first drainage hole 4 on the hub bottom 212 helps drain the accumulated water on the hub 21, avoiding the problem of increasing the mass of the fan blades and affecting the performance, reliability and safety hazards of the fan 10. At the same time, it prevents the accumulated water from entering the motor 1, plays a role in protecting the motor 1, and improves the safety and reliability of the motor 1 in the fan 10.

[0040] There are multiple ventilation parts 3; there are multiple first drainage holes 4; by providing multiple ventilation parts 3 and multiple first drainage holes 4, it is convenient for rapid ventilation and heat dissipation between the motor 1 and the fan blade assembly 2, and for the water accumulated on the hub 21 to be quickly discharged. Multiple ventilation parts 3 are evenly distributed around the circumference of the crankshaft of the motor 1; multiple first drainage holes 4 are evenly distributed around the circumference of the crankshaft of the motor 1. The ventilation parts 3 and the first drainage holes 4 are evenly distributed around the circumference of the crankshaft of the motor 1, so that the overall appearance of the fan blade assembly 2 is uniform and beautiful, and the heat dissipation and drainage facilities are reasonably set, which plays a good role in heat dissipation and drainage.

[0041] Preferably, the diameter of the plurality of first drainage holes 4 distributed circumferentially around the crankshaft of the motor 1 is D5; the diameter of the plurality of ventilation parts 3 distributed circumferentially around the crankshaft of the motor 1 is D6; the inner diameter of the hub side wall 211 is D4; D4>D5>D6; and D5 / D4≥0.6. By limiting the diameter of the first drainage holes 4 distributed circumferentially around the crankshaft of the motor 1 and the diameter of the ventilation parts 3 distributed circumferentially around the crankshaft of the motor 1, the positions of the plurality of first drainage holes 4 and the ventilation parts 3 are limited, and at the same time D5 / D4≥0.6, it is avoided that the hub side wall 211, the first drainage holes 4 and the ventilation parts 3 are too dense, which affects the heat dissipation and drainage effect of the fan blade assembly 2, and further affects the performance, reliability and safety hazards of the fan 10, and the safety and reliability of the motor 1.

[0042] In order to further provide effective protection for the motor 1, a shaft support portion 5 is provided between the hub bottom 212 and the shaft protrusion structure 23; the shaft support portion 5 is provided with a second drainage hole 6 which is connected to the lower end surface of the hub bottom 212 and is used to drain the accumulated water in the shaft protrusion structure 23. The shaft support portion 5 supports and fixes the crankshaft of the motor 1, so that the motor 1 can drive the fan blade assembly 2 to rotate. The second drainage hole 6 is provided on the shaft support portion 5, so that the accumulated water entering the shaft protrusion structure 23 can be quickly drained, and the accumulated water can be prevented from entering the motor 1, thereby protecting the motor 1 and improving the safety and reliability of the motor 1 in the fan 10.

[0043] In this specific embodiment, a plurality of first reinforcing ribs 7 distributed around the shaft protrusion structure 23 are provided between the hub 21 and the shaft protrusion structure 23. The lower end of the first reinforcing rib 7 is connected to the hub bottom 212. The provision of a plurality of first reinforcing ribs 7 helps to strengthen the stability between the hub 21 and the shaft protrusion structure 23, thereby improving the stability and reliability of the fan 10.

[0044] The first reinforcing rib 7 is a curved reinforcing rib formed by extending along the crankshaft of the motor 1 in a clockwise rotation. By providing the curved reinforcing rib, the blade assembly 2 is evenly stressed when rotating, thus avoiding excessive influence on the rotation performance of the fan 10.

[0045] In order to improve the stability of the connection between the motor 1 and the fan blade assembly 2, a second reinforcing rib 8 distributed around the crankshaft of the motor 1 is provided at the middle position of the lower end surface of the hub 21. The second reinforcing rib 8 is used for strengthening and fixing, which helps to improve the stability and reliability of the fan 10.

[0046] The fan 10 of the present invention is provided with a shaft protrusion structure 23 on the hub 21, and a groove 11 and a bearing protrusion 12 are provided on the lower end surface of the motor 1, wherein the size D3>D2>D1 of the diameters corresponding to the groove 11, the shaft protrusion structure 23 and the bearing protrusion 12; it is convenient to embed the shaft protrusion structure 23 into the cavity formed by the groove 11 and the bearing protrusion 12, and at the same time, the bearing protrusion 12 is embedded in the hollow position or the upper end of the shaft protrusion structure 23 to form a sealed structure, which effectively avoids the load change of the motor 1 caused by water gathering in the fan hub 21, so that the working performance of the motor 1 is stable, water is prevented from entering the motor 1, the motor 1 is protected, and the safety and reliability of the motor 1 in the fan 10 are improved.

[0047] The present application also discloses an air conditioner, such as Figure 6 and Figure 7 , comprising a body 20, an upper cover 30 and the above-mentioned fan 10; the fan 10 is arranged in the upper end of the body 20; the upper cover 30 is arranged at the upper end of the body 20 and is located above the fan 10. By arranging the fan 10 in the upper end of the body 20 and then using the upper cover 30 to protect the fan 10 and isolate dust, the normal use of the air conditioner is facilitated, and the overall stability and reliability of the air conditioner are improved.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present application.

Claims

1. A fan, comprising a motor and a fan blade assembly connected to the motor, characterized in that: The fan blade assembly comprises: Wheel hub; A plurality of blades connected to the hub and distributed around the hub; A shaft protrusion structure is provided at the middle position of the hub; the diameter of the shaft protrusion structure is D2; A groove is provided on the lower end surface of the motor; the diameter of the groove is D3; a bearing convex portion is provided at the lower end of the motor and is located in the groove; the diameter of the bearing convex portion is D1; ​​D3>D2>D1; The shaft protrusion structure is embedded in the cavity surrounded by the groove and the bearing protrusion to form a sealing structure; The wheel hub comprises a wheel hub side wall and a wheel hub bottom; the lower end of the wheel hub side wall is connected to the wheel hub bottom; the wheel hub bottom is provided with a ventilation portion connected to the upper and lower end surfaces of the wheel hub bottom; The bottom of the wheel hub is provided with a first drainage hole which is connected to the upper and lower end surfaces of the bottom of the wheel hub and is used to drain the accumulated water on the wheel hub; There are multiple ventilation parts; there are multiple first drainage holes; the multiple ventilation parts are evenly distributed around the circumference of the crankshaft of the motor; the multiple first drainage holes are evenly distributed around the circumference of the crankshaft of the motor; The diameter of the plurality of first drainage holes distributed circumferentially around the crankshaft of the motor is D5; the diameter of the plurality of ventilation parts distributed circumferentially around the crankshaft of the motor is D6; the inner diameter of the hub side wall is D4; D4>D5>D6; and D5 / D4≥0.

6.

2. The fan according to claim 1, characterized in that: An axle support portion is provided between the wheel hub bottom and the shaft protrusion structure; the axle support portion is provided with a second drainage hole which is connected with the lower end surface of the wheel hub bottom and is used to drain the accumulated water in the shaft protrusion structure.

3. The fan according to claim 1, characterized in that: A plurality of first reinforcing ribs distributed around the shaft protrusion structure are arranged between the wheel hub and the shaft protrusion structure.

4. The fan according to claim 3, characterized in that: The first reinforcing rib is a curved reinforcing rib formed by extending along the crankshaft of the motor in a clockwise rotation.

5. The fan according to claim 1, characterized in that: A second reinforcing rib distributed around the motor crankshaft is provided at the middle position of the lower end surface of the hub.

6. An air conditioner, characterized in that: It comprises a body, an upper cover and a fan as claimed in any one of claims 1 to 5; the fan is arranged in the upper end of the body; the upper cover is arranged at the upper end of the body and is located above the fan.

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