Fan and air conditioning unit

Abstract

The utility model discloses a draught fan and an air conditioning unit, the draught fan comprises fan blades and a motor used for driving the fan blades to rotate, and the motor comprises an installation support and a magnetic attraction assembly. An installation support connected with a rotating shaft is arranged in a shell of a motor, a first magnetic force part of a magnetic attraction assembly is arranged on the inner side wall of the shell of the motor, a second magnetic force part of the magnetic attraction assembly is arranged on the installation support, and the first magnetic force part and the second magnetic force part attract each other to generate force opposite to downward pressing pressure of fan blades, namely upward force. Therefore, the load and the abrasion of the bearing are reduced, and the service life of the motor and the service life of the bearing are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a fan and an air conditioning unit. Background Art

[0002] In the design and application of fan systems, it is a common layout to install the motor shaft upward. However, in this installation configuration, the fan will blow upward during operation, causing the air below to be continuously extracted, thus forming a significant pressure difference on both sides of the fan blades. This pressure difference phenomenon poses significant challenges to fan components, especially the motor shaft and its bearings.

[0003] During the operation of the fan, the fan blade is the core component for generating air volume. The air flow speeds on both sides of the fan blade are different, with the air flow speed on the upper side being faster and the air flow speed on the lower side being slower, thus forming a pressure difference. This pressure difference causes the fan blade to be subjected to a downward pressure, which is transmitted to the motor shaft fixed relatively to it through the fan blade. After being subjected to the downward pressure, the motor shaft will move downward, thereby squeezing the motor bearing.

[0004] As the fan air volume increases, the pressure difference on both sides of the fan blades will also increase accordingly, resulting in increased downward pressure. This increased pressure causes the motor bearings to be squeezed more severely, and the load on the bearings increases sharply, which in turn leads to increased bearing wear and excessive heat generation. Long-term operation in this state will not only reduce the service life of the bearings, but may also cause damage to the motor itself, such as motor overheating and aging of insulation materials. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the downward pressure on the motor shaft will increase the bearing load and reduce the bearing life, the utility model provides a fan and an air conditioning unit.

[0006] The technical solution adopted by the utility model is:

[0007] The utility model proposes a fan, comprising a fan blade and a motor for driving the fan blade to rotate, wherein the rotating shaft of the motor is connected to the fan blade, and the rotation of the fan blade exerts a downward force on the motor shaft, and the motor comprises:

[0008] A mounting bracket, wherein the mounting bracket is disposed in a housing of the motor and connected to the rotating shaft;

[0009] A magnetic attraction component, wherein the magnetic attraction component is arranged in the housing of the motor, the first magnetic part of the magnetic attraction component is arranged on the inner wall of the motor housing, the second magnetic part of the magnetic attraction component is arranged on the mounting bracket, the first magnetic part and the second magnetic part are arranged opposite to each other, and the first magnetic part and the second magnetic part generate a force opposite to the pressure of the fan blade.

[0010] Furthermore, the magnetic attraction component is arranged in the housing of the motor, located at the end where the rotating shaft is connected to the fan blade, and the second magnetic part can be attracted to the first magnetic part, and the second magnetic part drives the mounting bracket to indirectly give the rotating shaft a force toward the first magnetic part.

[0011] Furthermore, the magnetic attraction component also includes a power supply device, which is arranged in the housing of the motor and connected to the first magnetic part to supply power to the first magnetic part. The greater the current, the greater the magnetic force of the first magnetic part.

[0012] Furthermore, the power supply device comprises:

[0013] Silicon steel sheets, the silicon steel sheets are arranged around the rotating shaft;

[0014] The coil is surrounded and arranged in the housing of the motor and corresponds to the silicon steel sheet. The coil is connected to the first magnetic part. The rotation of the shaft drives the silicon steel sheet to rotate. Electric energy is generated between the coil and the silicon steel sheet to supply power to the first magnetic part.

[0015] Furthermore, the first magnetic part is an electromagnet, and the second magnetic part is an iron ring.

[0016] Furthermore, an annular support is provided on the inner wall of the shell near the end connected to the fan blade for mounting the first magnetic part.

[0017] Furthermore, the first magnetic portion and the second magnetic portion are ring-shaped.

[0018] Furthermore, the mounting bracket is in a circular ring shape, and the middle portion is connected to the rotating shaft of the motor.

[0019] Furthermore, the mounting bracket is annular, and the middle portion is connected to the rotating shaft of the motor.

[0020] The utility model also provides an air conditioning unit, comprising any one of the fans described above.

[0021] Compared with the prior art, the utility model proposes a fan, which includes a fan blade and a motor for driving the fan blade to rotate, and the motor includes a mounting bracket and a magnetic attraction component. A mounting bracket connected to the rotating shaft is arranged in the housing of the motor, and the first magnetic part of the magnetic attraction component is arranged on the inner side wall of the motor housing, and the second magnetic part is arranged on the mounting bracket. The first magnetic part and the second magnetic part attract each other, generating a force opposite to the downward pressure of the fan blade, that is, an upward force, thereby offsetting the downward pressure generated by the fan blade on the rotating shaft, thereby reducing the load and wear of the bearing, and extending the service life of the motor and the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the fan in the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of a motor according to an embodiment of the utility model;

[0025] Figure 3 This is a force conversion flow chart of an embodiment of the utility model;

[0026] 1. Motor;

[0027] 2. Wind blades;

[0028] 3. Install the bracket;

[0029] 4. Coil;

[0030] 5. Silicon steel sheet;

[0031] 6. A first magnetic part;

[0032] 7. A second magnetic part;

[0033] 8. Bearings;

[0034] 9. Rotating shaft;

[0035] 10. Shell. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The principle and structure of the present utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0038] In the design and application of fan systems, it is a common layout to install the motor shaft upward. However, in this installation configuration, the fan will blow upward during operation, causing the air below to be continuously extracted, thus forming a significant pressure difference on both sides of the fan blades. This pressure difference phenomenon poses significant challenges to fan components, especially the motor shaft and its bearings.

[0039] During the operation of the fan, the fan blade is the core component for generating air volume. The air flow speeds on both sides of the fan blade are different, with the air flow speed on the upper side being faster and the air flow speed on the lower side being slower, thus forming a pressure difference. This pressure difference causes the fan blade to be subjected to a downward pressure, which is transmitted to the motor shaft fixed relatively to it through the fan blade. After being subjected to the downward pressure, the motor shaft will move downward, thereby squeezing the motor bearing.

[0040] As the fan air volume increases, the pressure difference on both sides of the fan blades will also increase accordingly, resulting in increased downward pressure. This increased pressure causes the motor bearings to be squeezed more severely, and the load on the bearings increases sharply, which in turn leads to increased bearing wear and excessive heat generation. Long-term operation in this state will not only reduce the service life of the bearings, but may also cause damage to the motor itself, such as motor overheating and aging of insulation materials.

[0041] Therefore, how to reduce or eliminate the axial downward pressure on the motor caused by the pressure difference on both sides of the fan blades while ensuring the performance of the fan system, reduce the bearing load, and reduce wear and heat has become an urgent problem to be solved in the design and maintenance of the fan system.

[0042] like Figure 1-2 As shown, the utility model provides a fan, including a fan blade 2 and a motor 1 for driving the fan blade 2 to rotate. The motor 1 specifically includes: a mounting bracket 3 and a magnetic attraction component.

[0043] The mounting bracket 3 is disposed in the housing 10 of the motor 1 . The mounting bracket 3 is connected to the rotating shaft 9 . When the rotating shaft 9 rotates, the mounting bracket 3 can be driven to rotate together.

[0044] The magnetic attraction component is arranged in the housing 10 of the motor. The magnetic attraction component includes a first magnetic part 6 and a second magnetic part 7. The first magnetic part 6 is arranged on the inner wall of the motor housing 10, and the second magnetic part 7 is arranged on the mounting bracket 3. The first magnetic part 6 and the second magnetic part 7 are arranged correspondingly, and the first magnetic part 6 and the second magnetic part 7 generate a force opposite to the pressure of the fan blade 2. The first magnetic part 6 and the second magnetic part 7 attract or repel each other.

[0045] In traditional designs, when the fan is running, the downward pressure caused by the pressure difference on both sides of the fan blade 2 will increase the load on the motor bearing 8 and aggravate the wear. The magnetic component in this design can adjust the size and direction of the magnetic force to generate a force opposite to the downward pressure of the fan blade 2, that is, an upward force, thereby offsetting the downward pressure generated by the fan blade 2, thereby reducing the load and wear of the bearing 8 and extending the service life of the motor 1 and the bearing 8. The upward force and downward force here refer to the motor 1 being placed upright with the shaft 9 facing upward. If the motor 1 is placed horizontally, the upward force and downward force are replaced by the left force and the right force.

[0046] In a further embodiment, the magnetic attraction component is arranged in the housing 10 of the motor 1, at the end where the rotating shaft 9 is connected to the fan blade 2, the first magnetic part 6 is arranged on the side wall of the housing 10 close to the end of the fan blade 2, the second magnetic part 7 can be attracted to the first magnetic part 6, and the second magnetic part 7 drives the mounting bracket 3 to indirectly apply force to the rotating shaft 9 toward the first magnetic part 6.

[0047] The motor 1 is placed upright, and the motor 1 shaft 9 is facing upward vertically. The magnetic attraction component is arranged in the housing 10 of the motor 1 and is located at the top of the housing 10. The first magnetic part 6 is arranged on the upper wall of the housing 10, and the first magnetic part 6 is annular. The mounting bracket 3 is arranged in an annular shape on the upper part of the housing 10 and connected to the motor 1 shaft 9. The second magnetic part 7 is arranged on the mounting bracket 3 in an annular shape and is opposite to the first magnetic part 6. The second magnetic part 7 and the first magnetic part 6 are attracted to each other. Since the first magnetic part 6 is fixed to the inner wall of the housing 10 of the motor, the first magnetic part 6 will not move relative to each other. The second magnetic part 7 is connected to the mounting bracket 3. Since the mounting bracket 3 is arranged on the motor shaft 9, when the second magnetic part 7 and the first magnetic part 6 are attracted to each other, the second magnetic part and the first magnetic part 6 generate a force opposite to the downward pressure of the fan blade, that is, an upward force, which is used to offset the downward pressure of the motor 1 shaft 9 caused by the pressure difference on both sides of the fan blade 2.

[0048] The first magnetic part 6 is arranged on the side wall of the housing 10 near one end of the fan blade 2, and the second magnetic part 7 attracts the first magnetic part 6. This design can provide a stable supporting force for the rotating shaft 9. When the fan is running, this magnetic attraction can offset the downward pressure of the motor rotating shaft 9 caused by the pressure difference on both sides of the fan blade 2, thereby reducing the load on the bearing 8 of the fan motor when it is working, reducing the load and heat of the bearing 8.

[0049] In another embodiment, the motor 1 is placed upright, the motor 1 shaft 9 is facing vertically upward, the magnetic attraction component is arranged in the motor housing 10 and is located at the bottom of the housing 10, the first magnetic part 6 is arranged on the lower wall of the housing 10, and the mounting bracket 3 is arranged at the lower part of the housing 10 and connected to the motor 1 shaft 9. The second magnetic part 7 repels the first magnetic part 6. Since the first magnetic part 6 is fixed to the inner wall of the motor housing 10, the first magnetic part 6 will not move relative to the motor 1. The second magnetic part 7 is connected to the mounting bracket 3. Since the mounting bracket 3 is arranged on the motor shaft 9, when the second magnetic part 7 repels the first magnetic part 6, the second magnetic part 7 indirectly gives the mounting bracket 3 and the shaft 9 a force toward the second magnetic part 7, that is, upward, to offset the downward pressure on the motor axis caused by the pressure difference on both sides of the fan blade 2.

[0050] Due to the presence of the magnetic attraction component, the second magnetic part 7 drives the mounting bracket 3 to indirectly apply force in the opposite direction to the rotating shaft 9, which can balance the downward pressure generated by the fan blade 2, thereby reducing the load on the bearing 8. In long-term operation, this helps to reduce the wear of the bearing 8 and the rotating shaft 9 and extend the service life of the motor.

[0051] In a further embodiment, the magnetic attraction assembly also includes a power supply device.

[0052] The power supply device is connected to the first magnetic part 6 to supply power to the first magnetic part 6 . The greater the current supplying power to the first magnetic part 6 , the stronger the attraction of the first magnetic part 6 .

[0053] By adjusting the current provided by the power supply device to the first magnetic part 6, the suction strength of the first magnetic part 6 can be controlled. This means that the suction of the magnetic suction component can be flexibly adjusted according to different working conditions or requirements to meet specific application requirements. When a greater suction force is needed to offset the downward pressure generated by the fan blade 2, the suction force of the first magnetic part 6 can be enhanced by increasing the power supply current. Conversely, when the suction force needs to be reduced, the power supply current can be reduced.

[0054] The power supply device includes: silicon steel sheets 5 and coils 4.

[0055] The silicon steel sheet 5 is annular and is arranged around the rotating shaft 9 at the upper end of the motor housing 10. The coil 4 is arranged around the motor housing 10 and corresponds to the silicon steel sheet 5. The coil 4 is connected to the first magnetic part 6. When the rotating shaft 9 rotates, the silicon steel sheet 5 is driven to rotate. A micro generator is formed between the coil 4 and the silicon steel sheet 5, and the generated electrical energy is transmitted to the first magnetic part 6 through the coil 4 to supply power to the first magnetic part 6.

[0056] The faster the motor shaft 9 rotates, the greater the current generated by the silicon steel sheet 5 and the coil 4, the greater the current supplied to the first magnetic part 6, and the greater the suction force of the first magnetic part 6. The suction force is opposite to the pressure generated by the fan blade 2 on the shaft 9, thereby offsetting the effect of the pressure on the bearing 8.

[0057] Preferably, the first magnetic part 6 is an electromagnet, and the second magnetic part 7 is an iron ring. The electromagnet and the iron ring attract each other. The greater the current supplied by the power supply device to the electromagnet, the greater the suction force of the electromagnet on the iron ring, thereby offsetting more pressure from the fan blade 2.

[0058] When the motor shaft 9 rotates, the micro generator formed between the silicon steel sheet 5 and the coil 4 can generate electrical energy. This design realizes energy recovery, that is, converting kinetic energy that may have been wasted into electrical energy, thereby improving the energy utilization efficiency of the entire system.

[0059] The rotation speed of the motor shaft 9 is proportional to the current generated by the power supply device. The greater the rotation speed of the shaft 9, the greater the pressure of the fan blade 2 on the shaft 9. At the same time, the greater the current generated by the power supply device, the greater the suction force of the first magnetic part 6, which can resist the greater pressure from the fan blade 2.

[0060] In the housing 10 of the motor, an annular support is provided on the inner wall of one end near the connection between the fan blade 2 and the rotating shaft 9 for mounting the first magnetic part 6. Specifically, an annular support is provided at the top of the housing 10 of the motor for mounting the coil 4 of the power supply device, and the coil 4 is arranged on the support in an annular shape, and the position of the coil 4 corresponds to the position of the silicon steel sheet 5. This makes the whole structure more integrated, reduces the use of additional components and connectors, and thus improves the stability and reliability of the system.

[0061] The first magnetic part 6 and the second magnetic part 7 are annular, the first magnetic part 6 is annularly arranged on the upper wall of the motor housing 10, and the second magnetic part 7 is annularly arranged at a position corresponding to the first magnetic part 6. The mounting bracket 3 is annular, the middle part is connected to the rotating shaft 9 of the motor, and the second magnetic part 7 is arranged at the edge of the mounting bracket 3 corresponding to the first magnetic part 6.

[0062] The mounting bracket 3 includes: a supporting portion, which is in a circular ring shape, the inner edge of the supporting portion is connected to the rotating shaft 9 of the motor, the supporting portion is perpendicular to the rotating shaft 9, the outer edge of the supporting portion is connected to a connecting portion facing the first magnetic portion 6, the inner edge of the connecting portion is connected to the outer edge of the supporting portion, the outer edge of the connecting portion is connected to an annular supporting plate, the supporting plate is parallel to the first magnetic portion, the inner edge is connected to the outer edge of the connecting portion, and the second magnetic portion 7 is arranged in a ring shape on the supporting plate.

[0063] The mounting bracket is designed in a circular ring shape, has high rigidity and stability, and can effectively support and fix it to prevent it from shaking or deflecting during operation.

[0064] The utility model also provides an air conditioning unit, comprising the fan of the utility model.

[0065] Preferably, the mounting bracket 3 is made of steel.

[0066] The steel mounting bracket 3 has good toughness and fatigue resistance, and can maintain stable performance during long-term operation. Even when the fan is frequently started and stopped or subjected to external impact, the steel mounting bracket 3 can maintain the stability of its shape and size, reducing failures caused by deformation or fatigue.

[0067] like Figure 3 As shown, the present application has a certain self-adjustment ability and can change with the motor speed, so as to better adjust the force on the motor bearing 8 and reduce the damage to the bearing 8.

[0068] For example: the pressure above the fan blade 2 is Pa, the pressure below is Pb, and the pressure difference ΔP between the upper and lower parts of the fan blade 2 is: ΔP=Pa-Pb>0. Due to the pressure difference ΔP, there is a downward pressure F on the motor shaft, and as the air volume increases, ΔP increases, and F increases. As F increases, the force on the bearing 8 increases, and the load and heat generation of the bearing 8 increase.

[0069] Silicon steel sheets and coils form a micro generator. When the motor rotates, the silicon steel sheets and coils generate current I. At this time, the electromagnet is energized, generating a magnetic field, which generates a suction force F' on the iron ring of the device, thereby creating a force F' in the opposite direction of the pressure F to offset it. Ultimately, the force on the motor shaft is reduced, and indirectly the force on the motor bearing is reduced to ΔF: F - F'= ΔF, thereby reducing the negative impact of the fan's own operating conditions on the bearing and achieving the purpose of reducing the bearing load.

[0070] The force on the motor bearing 8 will be affected by the speed of the fan motor. When the motor speed increases, the fan air volume increases, and the motor shaft is subjected to a downward pressure F, Pa increases, Pb decreases, ΔP increases, and the pressure F increases; at the same time, the electric power of the power supply device also increases, the current I increases, and the electromagnet's suction force F' on the iron ring also increases, so that ΔF is in a relatively stable range. It can be seen that this application has a certain self-adjustment ability for the force ΔF on the motor bearing 8, and can well cope with the changes in the fan and improve the ability to reduce the load on the motor bearing 8. This application can reduce the load on the motor bearing 8 by recovering part of the kinetic energy of the motor as energy when the fan is operating normally, avoiding damage to the motor due to damage to the bearing 8, thereby reducing the load on the bearing 8, reducing the heat of the bearing 8, improving the life and reliability of the bearing 8, and preventing damage to the bearing 8. When the operating conditions of the fan change, it can also have a certain adaptive response to avoid excessive fluctuations in ΔF that affect normal operation.

[0071] The utility model may also include a controller, which controls the current supplied to the electromagnet and ultimately controls the bearing force ΔF. When the motor is running, the same speed will have different air volumes and different bearing forces corresponding to different blade shapes or different loads, and the motor current is positively correlated with the load, and the magnetic force of the electromagnet can be controlled by the motor current. When the motor speed is high and the blade is small, the air volume is small, and the power generation of the controller power supply device prevents the force generated by the electromagnet from being too large and wearing the motor instead; when the motor speed is low and the blade is large, the air volume is large, and the controller releases the restrictions on the power supply device, so that the force generated by the electromagnet is not too small and insufficient to offset the pressure F. Since the motor bearing is also affected by external interference, such as external atmospheric pressure, blade loss, air outlet blockage, fan static pressure, etc., the motor bearing force is detected by setting a pressure sensor, and the pressure sensor outputs a feedback signal to the controller, and the controller controls the power supply to the electromagnet, reduces external interference, reduces the change of the bearing force ΔF, and increases the stability of the system.

[0072] Compared with the prior art, the utility model proposes a fan, which includes a fan blade 2 and a motor for driving the fan blade 2 to rotate, and the motor includes a mounting bracket 3 and a magnetic attraction component. A mounting bracket 3 connected to a rotating shaft 9 is arranged in a housing 10 of the motor, a first magnetic part 6 of the magnetic attraction component is arranged on the inner side wall of the motor housing 10, and a second magnetic part 7 is arranged on the mounting bracket 3. The first magnetic part 6 and the second magnetic part 7 attract each other, generating a force opposite to the downward pressure of the fan blade 2, that is, an upward force, thereby offsetting the downward pressure generated by the fan blade 2 on the rotating shaft 9, thereby reducing the load and wear of the bearing 8, and extending the service life of the motor and the bearing 8.

[0073] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0075] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0076] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0077] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0078] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fan, comprising a fan blade and a motor for driving the fan blade to rotate, wherein the rotating shaft of the motor is connected to the fan blade, and the rotation of the fan blade applies downward pressure to the motor shaft, characterized in that: The motor comprises: A mounting bracket, wherein the mounting bracket is disposed in a housing of the motor and connected to the rotating shaft; A magnetic attraction component, wherein the magnetic attraction component is arranged in the housing of the motor, the first magnetic part of the magnetic attraction component is arranged on the inner wall of the motor housing, the second magnetic part of the magnetic attraction component is arranged on the mounting bracket, the first magnetic part and the second magnetic part are arranged opposite to each other, and the first magnetic part and the second magnetic part generate a force opposite to the pressure of the fan blade.

2. The fan according to claim 1, characterized in that: The magnetic attraction component is arranged in the housing of the motor, at one end where the rotating shaft is connected to the fan blade, and the second magnetic part can be attracted to the first magnetic part to generate a force opposite to the pressure of the fan blade.

3. The fan according to claim 2, characterized in that: The magnetic attraction component also includes a power supply device, which is arranged in the housing of the motor and connected to the first magnetic part to supply power to the first magnetic part. The greater the current, the greater the magnetic force of the first magnetic part.

4. The fan according to claim 3, characterized in that: The power supply device comprises: Silicon steel sheets, the silicon steel sheets are arranged around the rotating shaft; The coil is surrounded and arranged in the housing of the motor and corresponds to the silicon steel sheet. The coil is connected to the first magnetic part. The rotation of the shaft drives the silicon steel sheet to rotate. Electric energy is generated between the coil and the silicon steel sheet to supply power to the first magnetic part.

5. The fan according to claim 3, characterized in that: The first magnetic part is an electromagnet, and the second magnetic part is an iron ring.

6. The fan according to claim 2, characterized in that: An annular support is provided on the inner wall of the shell near one end connected to the fan blade for mounting the first magnetic part.

7. The fan according to claim 6, characterized in that: The first magnetic portion and the second magnetic portion are ring-shaped.

8. The fan according to claim 1, characterized in that: The mounting bracket is in the shape of a circular ring, and the middle portion is connected to the rotating shaft of the motor.

9. The fan according to claim 8, characterized in that: The mounting bracket comprises: A support portion, the support portion is annular, and the inner edge of the support portion is connected to the rotating shaft of the motor; A connecting portion, which is annular and faces the first magnetic portion, and an inner edge of the connecting portion is connected to an outer edge of the supporting portion; A support plate, wherein the support plate is annular, the support plate is parallel to the first magnetic part, an inner edge of the support plate is connected to an outer edge of the connecting part, and the second magnetic part is annularly arranged on the support plate.

10. An air conditioning unit, characterized in that: Including the fan described in any one of claims 1-9.

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