Fan motor self-cooling device and fan

Abstract

The embodiment of the utility model discloses a fan motor self-cooling device and a fan, and relates to the field of motor cooling. The heat pipe comprises a heat absorption pipe section, a transition pipe section and a heat dissipation pipe section which are arranged in sequence; the heat absorption pipe section is used for being embedded in a fan motor, and a liquid refrigerant is arranged in the heat absorption pipe section; the transition pipe section is sleeved with a heat preservation piece. The heat dissipation pipe section is used for being embedded in an air outlet pipeline of a fan; the transition pipe section is used for guiding a gaseous refrigerant formed by heat absorption and evaporation of a liquid refrigerant on the fan motor in the heat absorption pipe section to the heat dissipation pipe section, and guiding a liquid refrigerant condensed by heat exchange between the gaseous refrigerant and airflow of the air outlet pipeline in the heat dissipation pipe section to the heat absorption pipe section. Based on the scheme, circulating heat absorption and heat release are carried out through the heat pipe technology and airflow generated by the fan to achieve self-cooling of the fan motor, external complex cooling components and manual start and stop cooling components are not needed, the structure is simple, the cooling effect is good, and the cooling stability of the fan motor is improved.

Description

Technical Field

[0001] The utility model relates to the field of motor cooling, in particular to a self-cooling device for a fan motor and a fan. Background Art

[0002] As the driving structure of a fan, a fan motor will generate a large amount of heat during operation, resulting in an increase in the temperature of the fan motor. If it cannot be effectively and timely cooled, it may pose a threat to its service life and safe operation.

[0003] Currently, the cooling methods of fan motors mainly include natural cooling, air cooling, oil cooling and water cooling. Natural cooling is only applicable to motors with small heat generation. Air cooling has low cooling effect and will be accompanied by relatively large noise. Oil cooling or water cooling has relatively good cooling effect and can maintain relatively low operating noise, but it requires external cooling components with complex structures and special designs. When the external cooling components fail, it is easy to have problems with difficult maintenance, resulting in relatively low cooling stability of the fan motor. Summary of the Utility Model

[0004] Embodiments of the utility model disclose a self-cooling device for a fan motor and a fan, which are used to improve the technical problem that the existing fan motor needs external cooling components with complex structures and special designs, resulting in relatively low cooling stability of the fan motor.

[0005] In a first aspect of the embodiments of the utility model, a self-cooling device for a fan motor is provided, which is applied to a fan motor and a fan connected in transmission; the device includes: a heat pipe;

[0006] The heat pipe includes a heat absorption pipe section, a transition pipe section and a heat dissipation pipe section arranged in sequence;

[0007] The heat absorption pipe section is used to be embedded in the fan motor, and a liquid refrigerant is arranged in the heat absorption pipe section;

[0008] A heat preservation part is sleeved outside the transition pipe section;

[0009] The transition pipe section is used to guide the gaseous refrigerant formed by the liquid refrigerant absorbing heat from the fan motor and evaporating in the heat absorption pipe section to the heat dissipation pipe section, and guide the liquid refrigerant formed by the gaseous refrigerant exchanging heat with the air flow in the air outlet pipe and condensing in the heat dissipation pipe section to the heat absorption pipe section.

[0010] Optionally, the heat absorption pipe section is horizontally arranged, and the included angle between the heat absorption pipe section and the transition pipe section is greater than 5° and less than 180°.

[0011] Optionally, the transition pipe section is arranged parallel to the heat dissipation pipe section.

[0012] Optionally, heat dissipation fins are arranged outside the heat dissipation pipe section.

[0013] Optionally, the heat dissipation fins are perpendicular to the air outlet duct.

[0014] Optionally, the number of the heat dissipation fins is multiple groups, and the multiple groups of heat dissipation fins are distributed in a front-back cross manner.

[0015] Optionally, a liquid absorption core is arranged on the inner wall of the heat pipe.

[0016] Optionally, the liquid absorption core is made of a capillary porous material.

[0017] Optionally, the heat insulation member is heat insulating cotton.

[0018] In the second aspect of the embodiments of the present invention, a fan is provided, which is provided with multiple groups of heat pipes as described in any item of the first aspect, and the multiple groups of heat pipes are evenly distributed around the fan motor;

[0019] The air outlet duct of the fan is located above the fan motor.

[0020] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0021] The embodiments of the present invention provide a self-cooling device for a fan motor, including: a heat pipe; the heat pipe includes a heat absorption pipe section, a transition pipe section, and a heat dissipation pipe section arranged in sequence; the heat absorption pipe section is used for being embedded in the fan motor, and a liquid refrigerant is arranged in the heat absorption pipe section; a heat insulation member is sleeved outside the transition pipe section; the heat dissipation pipe section is used for being embedded in the air outlet duct of the fan; the transition pipe section is used for guiding the gaseous refrigerant formed by the liquid refrigerant absorbing heat from the fan motor and evaporating in the heat absorption pipe section to the heat dissipation pipe section, and guiding the liquid refrigerant formed by the gaseous refrigerant exchanging heat with the air flow in the air outlet duct and condensing in the heat dissipation pipe section to the heat absorption pipe section. Based on the above solution, through the heat pipe technology and the air flow generated by the fan for cyclic heat absorption and heat release, the self-cooling of the fan motor is realized, and there is no need to externally connect complex cooling components and manually start and stop the cooling components, and the cooling stability of the fan motor is improved with a simple structure and good cooling effect. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a self-cooling device for a fan motor provided in the embodiments of the present invention;

[0024] In the figure: 1. fan motor; 2. motor bearing; 3. motor main shaft; 4. coupling; 5. screw fan bearing; 6. fan main shaft; 7. fan; 8. fan air inlet; 9. heat absorption pipe section; 10. transition pipe section; 11. air outlet duct; 12. heat dissipation pipe section. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the embodiments described below are only part of the embodiments of the utility model, and all other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the utility model belong to the scope of protection of the utility model.

[0026] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the utility model.

[0027] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0028] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0030] See also Figure 1 , an embodiment of the utility model provides a fan motor self-cooling device, which is applied to a fan motor 1 and a fan 7 connected by transmission; the device includes: a heat pipe;

[0031] The heat pipe comprises a heat absorbing pipe section 9, a transition pipe section 10 and a heat dissipating pipe section 12 which are arranged in sequence;

[0032] The heat absorbing pipe section 9 is used to be embedded in the fan motor 1, and liquid refrigerant is arranged in the heat absorbing pipe section 9;

[0033] The transition pipe section 10 is provided with a heat-insulating member on the outer jacket

[0034] The heat dissipation pipe section 12 is used to be embedded in the air outlet pipe 11 of the fan;

[0035] The transition pipe section 10 is used to guide the gaseous refrigerant formed by the liquid refrigerant absorbing heat and evaporating the fan motor 1 in the heat absorption pipe section 9 to the heat dissipation pipe section 12, and to guide the liquid refrigerant condensed by the gaseous refrigerant and the air flow of the air outlet duct 11 in the heat dissipation pipe section 12 to the heat absorption pipe section 9.

[0036] In this embodiment, the fan main shaft 6 of the fan 7 is connected to the motor main shaft 3 of the fan motor 1 through the coupling 4, and the fan motor 1 can drive the fan 7 to rotate to generate wind power. During the rotation of the fan 7, the external ambient air is sucked in from the fan air inlet 8, and flows out from the air outlet duct 11 after being compressed by the fan 7. In specific implementation, when the fan main shaft 6 and the motor main shaft 3 are connected to work with other devices as needed, corresponding fan bearings 5 and motor bearings 2 can be set to support the main shaft; the heat pipe includes a heat absorption pipe section 9, a transition pipe section 10 and a heat dissipation pipe section 11 which are arranged in sequence. The heat pipe section 12 forms a sealed flow channel, the heat absorption pipe section 9 is embedded in the housing of the fan motor 1, and a liquid refrigerant with a low boiling point and easy to volatilize, such as liquid nitrogen, is placed in the heat absorption pipe section 9. The heat absorption pipe section 9 is connected to the heat dissipation pipe section 12 through the transition pipe section 10. The heat dissipation pipe section 12 is embedded in the air outlet duct 11 of the fan 7, and the transition pipe section 10 is in the ambient air. An insulation member for heat insulation and heat preservation is sleeved on the outside of the transition pipe section 10 to minimize the heat loss of heat exchange between the heat pipe and the ambient air, thereby ensuring efficient heat exchange between the heat absorption pipe section and the heat dissipation pipe section inside the heat pipe;

[0037] Based on the above solution, when the fan motor 1 is running, electrical energy is converted into mechanical energy, and heat is generated at the same time, which causes the temperature of the fan motor 1 to rise. The liquid refrigerant in the heat absorption pipe section 9 spontaneously absorbs the heat of the motor and is heated and evaporated. At this time, the temperature of the fan motor 1 drops, and the liquid refrigerant evaporates to form a gas, which moves upward through the transition pipe section 10 to the heat dissipation pipe section 12, and exchanges heat with the air flow blown by the fan 7 in the air outlet pipe 11. The temperature of the gaseous refrigerant drops and condenses into a liquid, and then flows back to the heat absorption pipe section 9 through the transition pipe section 10 to continue absorbing heat for cooling circulation. When the fan motor 1 stops running, the fan motor 1 no longer generates heat, the temperature of the motor drops, and the temperatures of the heat absorption pipe section 9 and the heat dissipation pipe section 12 at both ends of the heat pipe tend to be the same, and the refrigerant circulation inside the heat pipe stops. When the fan motor 1 is started again, the refrigeration cycle inside the heat pipe proceeds spontaneously. In this way, based on the heat pipe technology and the air flow generated by the fan, heat is absorbed and released in a cycle to achieve self-cooling of the fan motor, without the need for external complex cooling components and manual start-stop of cooling components. At the same time, since there are no complex cooling components such as moving parts and rotating parts, the failure rate is relatively low and the generation of noise can be minimized or even close to the possibility of not generating noise. The structure is simple and the cooling effect is good, which improves the cooling stability of the fan motor;

[0038] In specific implementation, there can be various ways to realize the cyclic flow of the liquid refrigerant between the heat absorption pipe section 9 and the heat dissipation pipe section 12 through the transition pipe section 10. For example: in one implementation, based on the installation method of the heat pipe, the fan, and the fan motor, the air outlet pipe is located above the fan motor, and the overall heat pipe can form a structure relationship similar to a vertically downward or inclined downward structure, so that it can flow back based on the action of gravity; in another implementation, a liquid absorption component or other auxiliary liquid guiding components are arranged inside the heat pipe to drive the flow of the liquid refrigerant.

[0039] In a specific embodiment, the heat absorption pipe section 9 is horizontally arranged, and the included angle between the heat absorption pipe section 9 and the transition pipe section 10 is greater than 5° and less than 180°.

[0040] In a specific implementation manner of this embodiment, the transition pipe section 10 and the heat dissipation pipe section 12 are arranged in parallel.

[0041] In this embodiment, on the basis of satisfying the gravity-assisted reflux of the liquid refrigerant from the heat dissipation pipe section 12 to the heat absorption pipe section 9, the included angles formed by the connection between the heat absorption pipe section 9 and the transition pipe section 10, and between the transition pipe section 10 and the heat dissipation pipe section 12 can be set within a corresponding preset angle range, so as to optimize the reflux effect;

[0042] In specific implementation, for different structural implementation methods of heat pipes with different angle combinations, for example: the heat absorption pipe section 9, the transition pipe section 10, and the heat dissipation pipe section 12 can be in a straight pipe type. At this time, the included angles formed between the transition pipe section 10 and the heat dissipation pipe section 12, and between the transition pipe section 10 and the heat dissipation pipe section 12 are both 0°; or, the heat absorption pipe section 9 and the transition pipe section 10 form a certain inclined included angle, and the transition pipe section 10 and the heat dissipation pipe section 12 are connected in parallel to form an included angle of 0°; or, the transition pipe section 10 and the heat dissipation pipe section 12 form a certain inclined included angle, and the heat absorption pipe section 9 and the transition pipe section 10 are connected in parallel to form an included angle of 0°; or, the heat absorption pipe section 9 and the transition pipe section 10, and the heat absorption pipe section 9 and the transition pipe section 10 both form a certain inclined included angle. At this time, the inclined included angles of the two can be different or the same;

[0043] In a preferred embodiment of the structural design of this embodiment, the heat absorption pipe section 9 is arranged horizontally. At this time, the included angle formed between the heat absorption pipe section 9 and the transition pipe section 10 is within a preset angle range where the included angle is greater than 5° and less than 180°. Further, the transition pipe section 10 and the heat dissipation pipe section 12 are arranged in parallel. At this time, it can be understood that the included angle between the transition pipe section 10 and the heat dissipation pipe section 12 is 0°, which is beneficial to promoting the efficient reflux of the liquid refrigerant.

[0044] In a specific embodiment, heat dissipation fins are provided outside the heat dissipation pipe section 12.

[0045] In this embodiment, the heat dissipation pipe section 12 is placed in the air outlet duct 11 of the fan 7. Heat dissipation fins are provided on the outer side of the heat dissipation pipe section 12, which can enhance the heat transfer effect between the heat dissipation pipe section 12 and the air flow in the air outlet duct 11 and accelerate the dissipation of heat.

[0046] In a specific implementation manner of this embodiment, the heat dissipation fins are perpendicular to the air outlet duct 11.

[0047] In this embodiment, the fan 7 usually conveys air in a predetermined direction based on the design of the air outlet duct 11. By setting the heat dissipation fins perpendicular to the air outlet duct 11, it can be understood that the heat dissipation fins are perpendicular to the flow direction of the air flow blown out of the air outlet duct 11, so as to relatively maximize the contact area between the heat dissipation fins and the air, thereby more effectively transferring heat.

[0048] In a specific implementation manner of this embodiment, the number of heat dissipation fins is multiple groups, and the multiple groups of heat dissipation fins are distributed in a front-back cross pattern.

[0049] In this embodiment, multiple groups of heat dissipation fins distributed in a front-back cross pattern are provided on the outer side of the heat dissipation pipe section 12. The adjacent groups of heat dissipation fins are staggered on the heat dissipation pipe section 12, which can enable the air flow in the air outlet duct 11 to contact a larger number of heat dissipation fins, extend the heat exchange time, thereby improving the heat dissipation efficiency and achieving a more stable heat dissipation performance.

[0050] Furthermore, if the heat dissipation fins of adjacent groups are distributed in a front-back cross pattern perpendicular to the air flow direction, it helps the air flow to be evenly distributed over all the heat dissipation fins for heat dissipation. At the same time, when the air flow in the air outlet duct 11 passes through multiple groups of heat dissipation fins, the air flow no longer has a uniform and straight laminar flow state, but becomes chaotic and rotational, forming a so-called "turbulent flow", thereby increasing the contact frequency and contact area between the air flow and the heat dissipation fins, and further improving the heat exchange efficiency.

[0051] In a specific embodiment, a wick is provided on the inner wall of the heat pipe.

[0052] In a specific implementation manner of this embodiment, the wick is made of a capillary porous material.

[0053] In this embodiment, providing a wick on the inner wall of the heat pipe can be understood as that the inner walls of the heat absorption pipe section 9, the transition pipe section 10, and the heat dissipation pipe section 12 are all covered with a wick. The wick can be made of a capillary porous material. This capillary structure can increase the contact area between the liquid and the inner wall, and can promote the rapid evaporation of the liquid refrigerant in the heat absorption pipe section 9. After evaporation and condensation, it can promote the rapid and effective reflux of the condensate back to the heat absorption pipe section 9 through its capillary force, thereby ensuring the efficient and rapid heat transfer of the heat pipe.

[0054] In a specific embodiment, the heat insulation member can be made of a heat insulation material such as heat insulation cotton for heat insulation.

[0055] The embodiment of the present utility model also provides a fan, which is provided with multiple groups of the above-mentioned heat pipes, and the multiple groups of heat pipes are evenly distributed around the fan motor; the air outlet duct of the fan is located above the fan motor. In specific implementation, the number of heat pipes can be multiple groups, for example, it can be set to one group each on the top, bottom, left, and right. In addition, the included angles between the heat absorption pipe section 9 and the transition pipe section 10, and between the transition pipe section 10 and the heat dissipation pipe section 12 in the multiple groups of heat pipes can be the same or different, and can be specifically set according to the actual spatial position in cooperation with other devices and the principle of operation convenience. At the same time, since the air outlet duct is located above the fan motor, the heat pipes as a whole can achieve reflux based on the action of gravity.

[0056] The above has introduced in detail a fan motor self-cooling device and a fan provided by the present utility model. For those of ordinary skill in the art, according to the idea of the embodiments of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A self-cooling device for a fan motor, characterized in that, A fan motor and a fan applied to drive connection; the device includes: a heat pipe; The heat pipe includes a heat absorption pipe section, a transition pipe section, and a heat dissipation pipe section arranged in sequence; The heat absorption pipe section is used to be embedded in the fan motor, and a liquid refrigerant is arranged in the heat absorption pipe section; A heat preservation member is sleeved outside the transition pipe section; The heat dissipation pipe section is used to be embedded in the air outlet pipe of the fan; The transition pipe section is used to guide the gaseous refrigerant formed by the liquid refrigerant absorbing heat from the fan motor and evaporating in the heat absorption pipe section to the heat dissipation pipe section, and guide the liquid refrigerant formed by the gaseous refrigerant exchanging heat with the air flow in the air outlet pipe and condensing in the heat dissipation pipe section to the heat absorption pipe section.

2. The self-cooling device for a fan motor according to claim 1, wherein The heat absorption pipe section is arranged horizontally, and the included angle between the heat absorption pipe section and the transition pipe section is greater than 5° and less than 180°.

3. The self-cooling device for a fan motor according to claim 2, wherein The transition pipe section is arranged parallel to the heat dissipation pipe section.

4. The self-cooling device for a fan motor according to claim 1, characterized in that, Heat dissipation fins are arranged outside the heat dissipation pipe section.

5. The self-cooling device for a fan motor according to claim 4, wherein The heat dissipation fins are used to be perpendicular to the air outlet pipe.

6. The self-cooling device for a fan motor according to claim 4, characterized in that The number of the heat dissipation fins is multiple groups, and the multiple groups of heat dissipation fins are distributed in a front-back cross manner.

7. The self-cooling device for a fan motor according to claim 1, characterized in that, A liquid absorption core is arranged on the inner wall of the heat pipe.

8. The self-cooling device for a fan motor according to claim 7, wherein, The liquid absorption core is made of a capillary porous material.

9. The self-cooling device for a fan motor according to claim 1, characterized in that, The heat preservation member is heat preservation cotton.

10. A fan, characterized in that, Multiple groups of heat pipes as described in any one of claims 1 to 9 are provided, and the multiple groups of heat pipes are evenly distributed around the fan motor; The air outlet pipe of the fan is located above the fan motor.

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