Heat dissipation structure of multi-blade centrifugal fan

Abstract

The utility model discloses a heat dissipation mechanism of a multi-blade centrifugal fan, which belongs to the technical field of multi-blade centrifugal fans and comprises a volute, a motor, an impeller, a heat dissipation structure and an intelligent control module, an impeller cavity, a side air inlet and an air outlet are arranged in the volute, and the motor is fixedly mounted on one side, corresponding to the side air inlet, of the outer side of the volute. The impeller is rotatably installed in the impeller cavity, the heat dissipation structure comprises a first heat dissipation device, a second heat dissipation device and a third heat dissipation device, the heat dissipation structure is arranged on the outer side of the motor and used for conducting heat dissipation on the motor, the intelligent control module comprises a main control board and a temperature sensor, and the temperature sensor is arranged on the outer side of the motor and used for detecting the real-time temperature of the motor. According to the utility model, the real-time temperature of the motor is detected through the temperature sensor, so that the main control board can adjust the operation of the heat dissipation structure according to the real-time temperature of the motor detected by the temperature sensor, thereby not only improving the heat dissipation efficiency, but also meeting the requirements on the heat dissipation efficiency under different working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of multi -vane centrifugal fan, concretely is a multi -vane centrifugal fan's heat radiation structure. BACKGROUND

[0002] Multi -vane centrifugal fan is a kind of machinery that relies on the input mechanical energy, improves gas pressure and sends gas, it is according to the principle of kinetic energy conversion into potential energy, utilizes high-speed rotating impeller to accelerate gas, then deceleration, changes flow direction, makes kinetic energy conversion into potential energy (pressure), further realizes ventilation or dust removal function, with the performance characteristics of many blade number, small size, high pressure coefficient, large flow coefficient and low noise, widely used in various trades.

[0003] Multi -vane centrifugal fan in the process of operation, inevitably, there is the problem of motor temperature rise, when temperature is too high, it will cause the performance of multi -vane centrifugal fan to decline, especially in the case of high load also can burn multi -vane centrifugal fan, affect the service life of multi -vane centrifugal fan.

[0004] At present, the problem of motor temperature rise in the process of multi -vane centrifugal fan operation, for example, the utility model patent with publication number CN218862926U discloses that the heat dissipation performance can be improved by setting guide vanes on spokes, but the single heat dissipation mode is used in the prior art, not only the heat dissipation effect is poor, and it is difficult to meet the demand for heat dissipation efficiency under different working conditions, and the speed of heat dissipation cannot be adjusted. Therefore, how to design a heat dissipation structure with good heat dissipation effect and meeting the demand for heat dissipation efficiency under different working conditions is a problem to be solved in the prior art. SUMMARY

[0005] To solve the problems in the above background art, the following technical solutions are adopted in the present application:

[0006] The present application provides a heat dissipation structure of multi -vane centrifugal fan, including volute, motor, impeller, heat dissipation structure, intelligent control module.

[0007] The volute has an impeller cavity, a side inlet and an outlet inside;

[0008] The motor is fixedly installed on one side of the volute outside corresponding to the side inlet;

[0009] The impeller is rotatably installed in the impeller cavity;

[0010] The heat dissipation structure includes a first heat dissipation device, a second heat dissipation device and a third heat dissipation device, and the heat dissipation structure is arranged on the outside of the motor for heat dissipation of the motor;

[0011] The intelligent control module comprises a main control board and a temperature sensor, the temperature sensor is arranged outside the motor and is used for detecting the real-time temperature of the motor, and the main control board controls the heat dissipation structure to dissipate heat for the motor according to the real-time temperature.

[0012] Further, the first heat dissipation device comprises a dustproof heat dissipation mesh cover, the dustproof heat dissipation mesh cover is arranged above the motor, the bottom of the dustproof heat dissipation mesh cover is shaped to be matched with the top of the motor, and the top of the dustproof heat dissipation mesh cover is provided with a plurality of fins.

[0013] Further, the dustproof heat dissipation mesh cover is detachably arranged above the motor.

[0014] Further, the second heat dissipation device comprises a semiconductor refrigeration sheet, the semiconductor refrigeration sheet comprises a cold end and a hot end arranged opposite to the cold end, and the two sides of the motor are respectively coated with heat-conducting silicone grease, and the cold end of the semiconductor refrigeration sheet is attached to the heat-conducting silicone grease.

[0015] Further, the second heat dissipation device further comprises a bypass pipeline, a first electromagnetic valve is arranged on the bypass pipeline, one end of the bypass pipeline is communicated with the air outlet, and the other end of the bypass pipeline corresponds to the hot end of the semiconductor refrigeration sheet.

[0016] Further, the third heat dissipation device comprises a water inlet pipeline, a water outlet pipeline, a heat dissipation pipeline, a water pump, a second electromagnetic valve and a cooling water tank, the water inlet of the water inlet pipeline is communicated with the cooling water tank, the water outlet of the water inlet pipeline is communicated with the water inlet of the heat dissipation pipeline, the heat dissipation pipeline is arranged on the lower side of the motor, the water outlet of the heat dissipation pipeline is communicated with the water inlet of the water outlet pipeline, and the water outlet of the water outlet pipeline is communicated with the cooling water tank.

[0017] The water pump and the second electromagnetic valve are arranged on the water inlet pipeline, and the main control board is electrically connected with the water pump and the second electromagnetic valve and is used for controlling the operation of the water pump and the second electromagnetic valve.

[0018] Further, the air outlet is provided with a wind speed detection device, the wind speed detection device is used for detecting the wind speed of the air outlet, and the main control board controls the heat dissipation structure to dissipate heat for the motor according to the real-time temperature and the wind speed.

[0019] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0020] The utility model discloses a heat dissipation structure is arranged at the motor of the multi-vane centrifugal fan, wherein the heat dissipation structure comprises a first heat dissipation device, a second heat dissipation device and a third heat dissipation device, and is intelligently controlled through an intelligent control module, so as to adjust the operation of the heat dissipation structure, which not only has good heat dissipation effect, but also can meet the demand for heat dissipation efficiency under different working conditions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the multi-blade centrifugal fan according to Embodiment 2 of this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the overall result from another angle;

[0024] Figure 3 for Figure 1 Side view;

[0025] Figure 4 for Figure 1 Cross-sectional view of the motor section.

[0026] Explanation of reference numerals in the attached drawings: 1. Volute; 11. Side air inlet; 12. Air outlet; 2. Motor; 3. Impeller; 4. Heat dissipation structure; 41. Dustproof heat dissipation mesh cover; 42. Fins; 43. Semiconductor cooling chip; 451. Water inlet pipe; 452. Water outlet pipe; 453. Heat dissipation pipe; 51. Bypass pipe; 6. Wind speed detection device. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0028] Example 1

[0029] This utility model provides a heat dissipation structure 4 for a multi-blade centrifugal fan, the specific structure of which is as follows: Figures 1-4, including volute 1, motor 2, impeller 3, heat dissipation structure 4, intelligent control module. Volute 1 has an impeller cavity, a side inlet 11 and an outlet 12 inside; motor 2 is fixedly installed on the outside of volute 1 corresponding to one side of side inlet 11, and impeller 3 is rotatably installed in the impeller cavity, wherein the output shaft of motor 2 is fixedly connected with impeller 3, when the multi-blade centrifugal fan operates, impeller 3 rotates under the driving of motor 2, and the air outside volute 1 enters volute 1 from side inlet 11 and is discharged from outlet 12 under the action of impeller 3.

[0030] Heat dissipation structure 4 includes first heat dissipation device, second heat dissipation device and third heat dissipation device, and heat dissipation structure 4 is arranged on the outside of motor 2, when the multi-blade centrifugal fan operates, the temperature of motor 2 gradually rises, and heat dissipation structure 4 is used for heat dissipation and cooling of motor 2, so as to improve the operation efficiency of multi-blade centrifugal fan.

[0031] The intelligent control module (not shown in the figure) includes a main control board and a temperature sensor, the temperature sensor is arranged on the outside of motor 2 for detecting the real-time temperature of motor 2, and the main control board controls heat dissipation structure 4 to heat dissipation of motor 2 according to the real-time temperature, especially when the working conditions are different, for example, the required air volume is large or the multi-blade centrifugal fan operates for a long time, the temperature of motor 2 rises continuously, so higher heat dissipation efficiency is needed to ensure that motor 2 will not be burned out, therefore, the temperature of motor 2 is detected in real time through the temperature sensor, and the main control board controls the operation of heat dissipation structure 4 through the temperature collected by the temperature sensor, so as to meet the demand for heat dissipation efficiency under different working conditions.

[0032] In some embodiments of the present embodiment, the first heat dissipation device includes a dustproof heat dissipation mesh cover 41, which is arranged above motor 2, so as to avoid dust accumulation on the top of motor 2, which affects the heat dissipation efficiency of motor 2. In the present embodiment, the bottom of dustproof heat dissipation mesh cover 41 is shaped to match the top shape of motor 2, and the dustproof heat dissipation mesh cover 41 is made of a material with high thermal conductivity, such as a metal mesh cover, so as to improve the heat dissipation efficiency. In addition, the top of dustproof heat dissipation mesh cover 41 is provided with a plurality of fins 42, which can further improve the rate of heat conduction outside the motor 2.

[0033] In some embodiments of the present embodiment, the dustproof heat dissipation mesh cover 41 is arranged above the motor 2 in a detachable manner. On the one hand, when the dust accumulated on the dustproof heat dissipation mesh cover 41 is relatively large, the dustproof heat dissipation mesh cover 41 can be timely detached for cleaning, so as to prevent the dust on the dustproof heat dissipation mesh cover 41 from affecting the heat dissipation effect. On the other hand, after the dustproof heat dissipation mesh cover 41 is used for a long time, the dustproof heat dissipation mesh cover 41 can be deformed due to high temperature or vibration of the motor 2, so that the bottom of the dustproof heat dissipation mesh cover 41 is not adapted to the top of the motor 2, a gap is generated between the dustproof heat dissipation mesh cover 41 and the top of the motor 2, and the heat dissipation effect is affected. Therefore, the dustproof heat dissipation mesh cover 41 is arranged in a detachable manner, so that the user can timely replace the deformed dustproof heat dissipation mesh cover 41 with reduced heat dissipation efficiency, and the use experience is improved.

[0034] In some embodiments of the present embodiment, the second heat dissipation device includes a semiconductor refrigeration sheet 43. The semiconductor refrigeration sheet 43 includes a cold end and a hot end arranged opposite to the cold end. When direct current is turned on, the temperature difference between the cold end and the hot end can be increased, so that the temperature of the cold end is reduced and the temperature of the hot end is increased. In the present embodiment, the two sides of the motor 2 are coated with a heat-conducting silicone grease, and the cold end of the semiconductor refrigeration sheet 43 is attached to the heat-conducting silicone grease. Therefore, when the direct current is turned on, the temperature of the cold end is reduced, thereby dissipating heat for the motor 2.

[0035] In some embodiments of the present embodiment, the second heat dissipation device further includes a bypass pipeline 51. The bypass pipeline 51 is provided with a first electromagnetic valve. One end of the bypass pipeline 51 is communicated with the air outlet 12, and the other end of the bypass pipeline 51 corresponds to the hot end of the semiconductor refrigeration sheet 43. When the first electromagnetic valve is opened, part of the air volume in the air outlet 12 is blown to the hot end of the semiconductor refrigeration sheet 43 through the bypass pipeline 51, so as to improve the heat exchange efficiency between the hot end and the ambient air, thereby improving the refrigeration capacity of the semiconductor refrigeration sheet 43 and further improving the heat dissipation efficiency of the semiconductor refrigeration sheet 43.

[0036] In some embodiments of the embodiment, the third heat dissipation device comprises: a water inlet pipe 451, a water outlet pipe 452, a heat dissipation pipe 453, a water pump, a second electromagnetic valve, and a cooling water tank; the water inlet of the water inlet pipe 451 is connected to the cooling water tank; the water outlet of the water inlet pipe 451 is connected to the water inlet of the heat dissipation pipe 453; the heat dissipation pipe 453 is arranged at the lower side of the motor 2; the water outlet of the heat dissipation pipe 453 is connected to the water inlet of the water outlet pipe 452; the water outlet of the water outlet pipe 452 is connected to the cooling water tank; the water pump and the second electromagnetic valve are arranged in the water inlet pipe 451; and the main control board is electrically connected to the water pump and the second electromagnetic valve for controlling the operation of the water pump and the second electromagnetic valve. When the required air volume is large or the multi-blade centrifugal fan is operated for a long time, the temperature of the motor 2 continuously rises, at this time, higher heat dissipation efficiency is required to ensure that the motor 2 will not be burned out, therefore, the main control board controls the water pump and the second electromagnetic valve to be opened, the low-temperature cooling water in the cooling water tank enters the heat dissipation pipe 453 below the motor 2 through the water inlet pipe 451 under the action of the water pump, and exchanges heat with the motor 2, in order to further improve the heat exchange efficiency, the heat dissipation pipe 453 can be arranged in a zigzag shape, and the high-temperature water exchanged by heat is returned to the cooling water tank through the water outlet pipe 452, thereby taking away the heat of the motor 2.

[0037] Embodiment two

[0038] The utility model provides a kind of multi-blade centrifugal fan's heat dissipation structure 4, compared with embodiment one in the embodiment, the difference is that air outlet 12 is equipped with wind speed detection device 6, wind speed detection device 6 is used to detect the air speed of air outlet 12, and main control board is according to the real-time temperature detected by temperature sensor and the air speed detected by wind speed detection device 6 jointly controls heat dissipation structure 4 and carries out heat dissipation to motor 2.When temperature sensor is used for a long time, there can be measurement error or the risk of temperature sensor damage, if temperature sensor is damaged, main control board does not control heat dissipation structure 4 to carry out heat dissipation in time, it can lead to motor 2 burn out, therefore, the main control board in the embodiment controls heat dissipation structure 4 and carries out heat dissipation to motor 2 according to the real-time temperature detected by temperature sensor and the air speed detected by wind speed detection device 6, when the real-time temperature detected by temperature sensor and the air speed detected by wind speed detection device 6 one of them has reached the threshold value set, it is explained that motor 2 exists high temperature or burn risk, therefore, main control board adjusts heat dissipation structure 4 to carry out heat dissipation in time, reduce the risk of motor 2 damage.

[0039] The utility model working principle is: after starting multi-blade centrifugal fan, motor 2 drives impeller 3 rotation, and external air enters from side air inlet 11 under the action of impeller 3, and is discharged from air outlet 12 after passing through volute 1.When multi-blade centrifugal fan is just started or the required air volume is small, the air speed detected by wind speed detection device 6 is less than V1, and the temperature detected by temperature detection device is less than T1, first heat dissipation device is used to dissipate heat;

[0040] When the multi-vane centrifugal fan continuously runs or the air volume needs to be further increased, if the wind speed detected by the wind speed detection device 6 is greater than or equal to V2 or the temperature detected by the temperature detection device is greater than or equal to T2, the main control board controls the first electromagnetic valve 52 to open, and part of the air in the air outlet 12 is blown to the hot end of the semiconductor refrigeration fin 43 through the bypass pipeline 51, so that the refrigeration efficiency of the semiconductor refrigeration fin 43 is improved, and the heat dissipation efficiency of the semiconductor refrigeration fin 43 is further improved.

[0041] When the multi-vane centrifugal fan continuously runs or the air volume needs to be further increased, if the wind speed detected by the wind speed detection device 6 is greater than or equal to V2 or the temperature detected by the temperature detection device is greater than or equal to T2, the main control board controls the first electromagnetic valve 52 to open, and part of the air in the air outlet 12 is blown to the hot end of the semiconductor refrigeration fin 43 through the bypass pipeline 51, so that the refrigeration efficiency of the semiconductor refrigeration fin 43 is improved, and the heat dissipation efficiency of the semiconductor refrigeration fin 43 is further improved.

[0042] When the multi-vane centrifugal fan continuously runs or the air volume needs to be further increased, if the wind speed detected by the wind speed detection device 6 is greater than or equal to V2 or the temperature detected by the temperature detection device is greater than or equal to T2, the main control board controls the first electromagnetic valve 52 to open, and part of the air in the air outlet 12 is blown to the hot end of the semiconductor refrigeration fin 43 through the bypass pipeline 51, so that the refrigeration efficiency of the semiconductor refrigeration fin 43 is improved, and the heat dissipation efficiency of the semiconductor refrigeration fin 43 is further improved.

[0043] The utility model discloses a through main control board carries out intelligent control, and the operation of intelligent adjustment heat dissipation structure 4 not only good heat dissipation effect, and can satisfy the demand of heat dissipation efficiency under different working conditions.

[0044] Although various embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A heat dissipation structure of a multi-blade centrifugal fan, comprising a volute, a motor, an impeller, a heat dissipation structure and an intelligent control module, characterized in that: the volute has an impeller cavity, a side air inlet and an air outlet inside; the motor is fixedly installed on one side of the volute outside corresponding to the side air inlet; the impeller is rotatably installed in the impeller cavity; the heat dissipation structure comprises a first heat dissipation device, a second heat dissipation device and a third heat dissipation device, and is arranged outside the motor for dissipating heat of the motor; the intelligent control module comprises a main control board and a temperature sensor, the temperature sensor is arranged outside the motor for detecting real-time temperature of the motor, and the main control board controls the heat dissipation structure to dissipate heat of the motor according to the real-time temperature. The first heat dissipation device comprises a dustproof heat dissipation mesh cover, the dustproof heat dissipation mesh cover is arranged above the motor, the bottom of the dustproof heat dissipation mesh cover is shaped to be matched with the top of the motor, and a plurality of fins are arranged on the top of the dustproof heat dissipation mesh cover. The dustproof heat dissipation mesh cover is detachably arranged above the motor. The second heat dissipation device comprises a semiconductor refrigeration sheet, the semiconductor refrigeration sheet comprises a cold end and a hot end arranged opposite to the cold end, both sides of the motor are coated with heat-conducting silicone grease, and the cold end of the semiconductor refrigeration sheet is attached to the heat-conducting silicone grease. The second heat dissipation device further comprises a bypass pipeline, a first electromagnetic valve is arranged on the bypass pipeline, one end of the bypass pipeline is communicated with the air outlet, and the other end of the bypass pipeline corresponds to the hot end of the semiconductor refrigeration sheet.

6. The heat dissipation structure of the multi-blade centrifugal fan according to claim 1, characterized in that:

2. The heat dissipation structure of a multi-vane centrifugal fan according to claim 1, wherein, The third heat dissipation device comprises a water inlet pipeline, a water outlet pipeline, a heat dissipation pipeline, a water pump, a second electromagnetic valve and a cooling water tank, the water inlet of the water inlet pipeline is communicated with the cooling water tank, the water outlet of the water inlet pipeline is communicated with the water inlet of the heat dissipation pipeline, the heat dissipation pipeline is arranged below the motor, the water outlet of the heat dissipation pipeline is communicated with the water inlet of the water outlet pipeline, and the water outlet of the water outlet pipeline is communicated with the cooling water tank; 3. The heat dissipation structure of a multi-vane centrifugal fan according to claim 2, wherein, The water pump and the second electromagnetic valve are arranged on the water inlet pipeline, and the main control board is electrically connected with the water pump and the second electromagnetic valve for controlling the water pump and the second electromagnetic valve to operate.

4. The heat dissipation structure of a multi-vane centrifugal fan according to claim 1, wherein, The air outlet is provided with a wind speed detection device, the wind speed detection device is used for detecting the wind speed of the air outlet, and the main control board controls the heat dissipation structure to dissipate heat of the motor according to the real-time temperature and the wind speed.

5. The heat dissipation structure of a multi-vane centrifugal fan according to claim 4, characterized in that: ​ ​ ​ ​ 7. The heat dissipation structure of a multi-vane centrifugal fan according to claim 1, wherein: ​

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