A mixer structure facilitating heat dissipation

Abstract

The utility model relates to domestic appliance technical field, especially point to a kind of mixer structure being conducive to heat dissipation;Including fuselage, handle, motor and circuit board, the fuselage is connected with handle and the inner cavity of two is communicated, the fuselage is equipped with air inlet and air outlet, motor is fixed in the inner cavity of fuselage;Fan is equipped on the tail shaft of motor, fan forms the air flow channel from air inlet guiding air outlet in fuselage inner cavity;The circuit board is fixed in the inner cavity of handle, and heat sink is connected on circuit board, and heat sink is at least partially arranged in air flow channel;A kind of mixer structure being conducive to heat dissipation of the utility model, fan is rotated by the tail shaft of motor, fan forms air flow channel between air inlet and air outlet, airflow is cooled to motor at the same time, and heat sink forms forced air cooling, to reduce the working temperature of circuit board, improve the service life of high-power output mixer.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a mixer structure that facilitates heat dissipation. Background Technology

[0002] Blenders are mainly divided into two types: horizontal and handheld. Due to their size and handheld nature, handheld blenders have a lower power output than horizontal blenders, making them suitable for processing food in non-standard containers. Handheld blenders offer great flexibility. Currently, customers in the European and American markets desire blenders with higher power outputs to allow for wider application of handheld blenders without compromising flexibility.

[0003] With the increase in the rated output power of handheld blenders, the heat generation of the motor and PCB control board also becomes more severe. Chinese Patent CN204119638U discloses a control circuit board for a food blender, including a main PCB board and a sub-PCB board, connected by a connector. A relay is soldered to the center of the front side of the main PCB board; a heat sink for dissipating heat from circuit components is soldered to the upper part of the front side of the main PCB board, and a thyristor is fixedly mounted on the heat sink; the A1, A2, and G pins of the thyristor are all soldered to the main circuit board. By fixing the thyristor to the heat sink and placing it, along with the relay, in a designated area on the main PCB board, the heat dissipation performance of the main PCB board is improved. Simultaneously, a digital tube or LCD is soldered to the upper part of the sub-PCB board to ensure the display effect of the control circuit board.

[0004] However, due to the compact internal layout of handheld blenders, heat from the heat sink accumulates inside the machine. The existing technologies described above still cannot solve the PCB board heat dissipation problem and cannot meet the needs of high-power handheld blenders. Therefore, the existing technologies require further improvement and development. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a mixer structure that is rationally designed, can effectively control the temperature of the circuit board, and improves the overall service life, thus promoting heat dissipation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The present invention discloses a heat dissipation-friendly mixer structure, comprising a body, a handle, a motor, and a circuit board. The body and the handle are connected and their internal cavities are interconnected. The body has an air inlet and an air outlet. The motor is fixedly installed in the internal cavity of the body. A fan is installed on the tail shaft of the motor, and the fan forms an airflow channel in the internal cavity of the body, leading from the air inlet to the air outlet. The circuit board is fixedly installed in the internal cavity of the handle, and a heat sink is connected to the circuit board, with at least a portion of the heat sink disposed in the airflow channel.

[0008] It is understandable that the heat generated during the operation of a high-power blender includes both motor heat and circuit board heat. The transformer circuitry and components on the circuit board will generate significant heat under the high current output of the motor. Furthermore, due to the limited internal space of handheld blenders, the circuit board is usually located inside the handle cavity, leading to heat buildup and severe overheating of the handle surface, which in turn causes rapid aging of the components on the circuit board. This invention addresses this issue by placing the circuit board inside the handle cavity, with a heat sink connected to it. The heat sink is partially positioned within the airflow channel for air cooling of the circuit board, preventing overheating and aging of the circuit board and components, and extending the overall lifespan.

[0009] Specifically, while the motor is running, its tail shaft drives the fan to rotate, forming an airflow channel within the machine body from the air inlet to the air outlet, carrying away the heat generated during motor operation. It is understood that the fan is a centrifugal fan, and the heat sink extends into the inner cavity of the machine body and is positioned opposite the fan, allowing the airflow channel to pass over the heat sink. Part of the airflow blowing over the heat sink rapidly dissipates heat from the heat sink and circuit board, effectively controlling the internal temperature of the high-power mixer during operation and extending its overall service life.

[0010] According to the above scheme, the air inlet, motor, and air outlet are arranged sequentially from bottom to top, with the fan and air outlet facing each other. Specifically, the air outlet is located on the upper side wall of the body, and the air inlet is located on the lower side wall of the body. The motor is fixed in the middle of the body, with the fan on its tail shaft facing the air outlet. The handle is connected to the upper end of the body, the upper end of the heat sink is connected to the circuit board, and the lower end of the heat sink extends into the inner cavity of the body, thus partially placing it in the airflow channel. The air outlet and air inlet are respectively located at the upper and lower ends of the body, and the airflow channel passes through the inner cavity of the body from bottom to top, which can remove the heat generated by the motor during operation.

[0011] According to the above scheme, the air outlet is located on one side of the fan, and the heat sink is located on the other side of the fan. The fan is a centrifugal fan, and the airflow channel formed by the fan blows part of the airflow towards the heat sink and then into the inner cavity of the handle. Specifically, the heat sink and the air outlet are respectively arranged opposite to each other on the side wall of the fan. The fan is located in the upper inner cavity of the body. When the air flows from bottom to top and is discharged from the air outlet, the centrifugal force generated by the fan will cause part of the airflow to blow towards the heat sink, improving the heat dissipation efficiency of the heat sink, thereby reducing the operating temperature of the circuit board.

[0012] According to the above scheme, a reinforcing keel is provided in the inner cavity of the upper part of the fuselage. The reinforcing keel includes a first horizontal partition and a second horizontal partition, which are arranged vertically at intervals. A first vertical partition and a second vertical partition are provided between the first horizontal partition and the second horizontal partition, which are arranged horizontally at intervals. The first horizontal partition, the second horizontal partition, the first vertical partition, and the second vertical partition are respectively connected to the inner sidewall of the fuselage.

[0013] It is understood that the body and handle of this utility model are hollow, thin-walled structures. During processing, the body and handle are usually divided into two symmetrical shells for injection molding. The two shells are then combined to form the body and handle.

[0014] Furthermore, since the user holds the handle to operate the mixer, the motor and the mixing head on the body cause the center of gravity of the machine to be at the lower end. Therefore, a reinforcing rib needs to be added to the upper part of the machine to improve structural strength. When the machine is placed vertically, the first and second horizontal partitions are arranged laterally within the inner cavity of the machine, and the first and second vertical partitions are arranged vertically within the inner cavity of the machine. These four partitions, arranged in both directions, effectively strengthen the overall structural strength of the machine.

[0015] According to the above scheme, the inner cavity of the fuselage surrounded by the first horizontal partition, the second horizontal partition, the first vertical partition, and the second vertical partition constitutes a vortex air duct, and the air outlet is located on the side wall of the fuselage on one side of the vortex air duct. A ventilation passage is provided on the second horizontal partition, and the motor is located in the inner cavity of the fuselage below the reinforced keel. The tail shaft of the motor passes through the ventilation passage, allowing the fan to be rotatably mounted within the vortex air duct. The air inlet, the inner cavity of the fuselage, the ventilation passage, the vortex air duct, and the air outlet are sequentially connected. The fan drives the air to flow in a directional direction, forming an airflow channel. The fan rotates within the vortex air duct, driving the airflow from the outside into the fuselage, then upwards along the inner cavity of the fuselage past the motor, and finally out through the air outlet, carrying away heat. The principle of the fan and the vortex air duct generating directional airflow, as well as the specific structure of the fan, are existing technologies and will not be elaborated here. It should be explained that the fan generates centrifugal force during rotation, causing the airflow in the inner cavity of the fuselage to be discharged laterally from the air outlet.

[0016] According to the above scheme, the first horizontal partition, the second horizontal partition, the first vertical partition, and the fuselage sidewall together form a ventilation corridor within the fuselage cavity. A notch is provided on the first horizontal partition to connect the ventilation corridor to the handle cavity, and the lower end of the heat sink passes through the notch, partially placing it within the ventilation corridor. Ventilation holes are provided on the first vertical partition, connecting the vortex airflow duct and the ventilation corridor. It is understood that the ventilation corridor and the vortex airflow duct are located on opposite sides of the first vertical partition, and the ventilation holes connect the ventilation corridor and the vortex airflow duct. When the fan rotates within the vortex airflow duct, most of the airflow is exhausted from the outlet. During rotation, the fan generates centrifugal force, driving airflow from the ventilation holes into the ventilation corridor, thereby dissipating heat from the circuit board by blowing on the heat sink.

[0017] Furthermore, the handle and the body are separated by the aforementioned reinforced keel, meaning that the ventilation corridor and the vortex air duct are connected only through ventilation holes, which makes the inner cavity of the handle more waterproof and can meet the IPX1 waterproof test standard.

[0018] It is understood that the handle and the body are integrally injection molded hollow structures. The two shells on the left and right are spliced ​​together to form the body and handle, which is not sealed. This allows airflow to blow into the ventilation channel from the vent, so that heat can be carried by the airflow to spread throughout the inner cavity of the handle. Moreover, this heat can be dissipated through the entire handle, avoiding heat accumulation on the circuit board and causing the components to age.

[0019] Furthermore, the handle is also provided with some micropores, which are located on the non-grip parts of the handle so that heat can be dissipated and escape through the micropores.

[0020] According to the above scheme, the distance between the heat sink and the vortex airflow channel is L, 0.5mm≤L≤2mm. By placing the heat sink and the vortex airflow channel close together and controlling the distance L appropriately, the airflow generated by the fan can pass through the ventilation holes to achieve a better heat dissipation effect on the heat sink.

[0021] According to the above scheme, the diameter of the ventilation hole is C, 5mm≤C≤20mm. As mentioned above, the diameter C of the ventilation hole must first meet the heat dissipation requirements of the heat sink, that is, the ventilation hole needs to be able to pass through a sufficient air volume, but the diameter of the ventilation hole cannot be too large. Under the condition of controlling a reasonable diameter C, the mixer can meet the IPX1 waterproof test standard.

[0022] According to the above scheme, the surface of the heat sink is provided with several grooves. The heat sink can increase its surface area by using grooves, thereby increasing its heat exchange efficiency with the air. Of course, the grooves can also be replaced by fins to achieve the same effect. The advantage of setting grooves on the surface of the heat sink is that it is easy to process and has a lower cost.

[0023] According to the above scheme, this utility model also includes a stirring rod. The lower end of the body 1 is provided with an output interface, and the motor is connected to the output interface via a transmission connection. The stirring rod is mounted on the output interface. The stirrer used in this utility model has a high motor output power, which corresponds to significant heat generation on the circuit board. Through the above structural design, effective heat dissipation of the circuit board can be achieved within a limited space, thus improving the overall service life.

[0024] This invention provides a heat dissipation-enhancing mixer structure. The motor's tail shaft drives a fan to rotate, and the fan forms an airflow channel between the air inlet and outlet. The airflow dissipates heat from the motor while simultaneously providing forced air cooling to the heat sink, thereby reducing the operating temperature of the circuit board and extending the service life of the high-power mixer. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure and internal assembly of this utility model;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of the fuselage of this utility model;

[0027] Figure 3 This is a side cross-sectional view of the fuselage of this utility model.

[0028] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the fuselage at the vortex air duct of this utility model;

[0029] Figure 5 This is a schematic diagram of the circuit board and heat sink structure of this utility model.

[0030] In the picture:

[0031] 1. Body; 2. Handle; 3. Reinforced frame; 4. Stirring rod; 11. Motor; 12. Air inlet; 13. Air outlet; 14. Fan; 15. Output interface; 21. Circuit board; 22. Heat sink; 23. Groove; 31. First horizontal partition; 32. Second horizontal partition; 33. First vertical partition; 34. Second vertical partition; 35. Vortex air duct; 36. Ventilation passage; 37. Ventilation corridor; 38. Notch; 39. Ventilation hole. Detailed Implementation

[0032] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-5As shown, the present invention discloses a heat dissipation-friendly mixer structure, comprising a body 1, a handle 2, a motor 11, and a circuit board 21. The body 1 is connected to the handle 2, and their inner cavities are interconnected. The body 1 is provided with an air inlet 12 and an air outlet 13. The motor 11 is fixed in the inner cavity of the body 1. A fan 14 is provided on the tail shaft of the motor 11, and the fan 14 forms an airflow channel in the inner cavity of the body 1, leading from the air inlet 12 to the air outlet 13. The circuit board 21 is fixed in the inner cavity of the handle 2, and a heat sink 22 is connected to the circuit board 21. The heat sink 22 is at least partially disposed in the airflow channel.

[0034] It is understandable that the heat generated during the operation of a high-power blender includes heat from both the motor 11 and the circuit board 21. The transformer circuit and components on the circuit board 21 will generate significant heat under the high current output of the motor 11. Furthermore, due to the limited internal space of handheld blenders, the circuit board 21 is typically placed inside the handle 2, leading to heat buildup and severe surface heating on the handle 2, which in turn causes rapid aging of the components on the circuit board 21. In this invention, the circuit board 21 is placed inside the handle 2, and a heat sink 22 is connected to the circuit board 21. The heat sink 22 is partially positioned within the airflow channel to provide air cooling for the circuit board 21, preventing overheating and aging of the circuit board 21 and its components, and extending the overall service life.

[0035] Specifically, while the motor 11 is running, it drives the fan 14 to rotate via its tail shaft, forming an airflow channel within the machine body 1 from the air inlet 12 to the air outlet 13, carrying away the heat generated by the motor 11 during operation. It is understood that the fan 14 is a centrifugal fan, and the heat sink 22 partially extends into the inner cavity of the machine body 1 and is positioned opposite to the fan 14, allowing the airflow channel to pass through the heat sink 22. Part of the airflow blowing over the heat sink 22 rapidly dissipates heat from the heat sink 22 and the circuit board 21, effectively controlling the internal temperature of the high-power mixer during operation and extending its overall service life.

[0036] The air inlet 12, motor 11, and air outlet 13 are arranged sequentially from bottom to top, with the fan 14 positioned opposite the air outlet 13. Specifically, the air outlet 13 is located on the upper side wall of the body 1, and the air inlet 12 is located on the lower side wall of the body 1. The motor 11 is fixed in the middle of the body 1, with the fan 14 on its tail shaft positioned opposite the air outlet 13. The handle 2 is connected to the upper end of the body 1, the upper end of the heat sink 22 is connected to the circuit board 21, and the lower end of the heat sink 22 extends into the inner cavity of the body 1, thus partially placing it in the airflow channel. The air outlet 13 and air inlet 12 are respectively located at the upper and lower ends of the body 1, and the airflow channel passes through the inner cavity of the body 1 from bottom to top, which can carry away the heat generated by the motor 11 during operation.

[0037] The air outlet 13 is located on one side of the fan 14, and the heat sink 22 is located on the other side of the fan 14. The fan 14 is a centrifugal fan, and the airflow channel formed by the fan 14 blows towards the heat sink 22 and then into the inner cavity of the handle 2. Specifically, the heat sink 22 and the air outlet 13 are respectively arranged opposite to each other on the side wall of the fan 14. The fan 14 is located in the upper inner cavity of the body 1. When the air flows from bottom to top and is discharged from the air outlet 13, the centrifugal force generated by the fan 14 will cause part of the airflow to blow towards the heat sink 22, improving the heat dissipation efficiency of the heat sink 22, thereby reducing the operating temperature of the circuit board 21.

[0038] The upper part of the fuselage 1 is provided with a reinforcing keel 3 in the inner cavity. The reinforcing keel 3 includes a first horizontal partition 31 and a second horizontal partition 32, which are arranged vertically at intervals. A first vertical partition 33 and a second vertical partition 34 are provided between the first horizontal partition 31 and the second horizontal partition 32, which are arranged horizontally at intervals. The first horizontal partition 31, the second horizontal partition 32, the first vertical partition 33 and the second vertical partition 34 are respectively connected to the inner side wall of the fuselage 1.

[0039] It is understood that the body 1 and handle 2 of this utility model are hollow thin-walled structures. During processing, the body 1 and handle 2 are usually divided into two symmetrical shells for injection molding. The two shells are combined to form the body 1 and handle 2.

[0040] Furthermore, the user holds the handle 2 to use the mixer. The motor 11 and the mixing head on the body 1 cause the center of gravity of the body 1 to be at the lower end. A reinforcing rib 3 needs to be added to the upper end of the body 1 to improve structural strength. When the body 1 is placed vertically, the first horizontal partition 31 and the second horizontal partition 32 are arranged horizontally in the inner cavity of the body 1, and the first vertical partition 33 and the second vertical partition 34 are arranged vertically in the inner cavity of the body 1. The four partitions arranged in the horizontal and vertical directions can effectively strengthen the overall structural strength of the body 1.

[0041] The inner cavity of the fuselage 1, surrounded by the first horizontal partition 31, the second horizontal partition 32, the first vertical partition 33, and the second vertical partition 34, forms a vortex air duct 35. The air outlet 13 is located on the side wall of the fuselage 1 on one side of the vortex air duct 35. A ventilation passage 36 is provided on the second horizontal partition 32. The motor 11 is located in the inner cavity of the fuselage 1 below the reinforcing keel 3. The tail shaft of the motor 11 passes through the ventilation passage 36, allowing the fan 14 to be rotatably installed in the vortex air duct 35. The air inlet 12, the inner cavity of the fuselage 1, the ventilation passage 36, the vortex air duct 35, and the air outlet 13 are connected in sequence. The fan 14 drives the air to flow in a directional direction to form an airflow channel.

[0042] Specifically, the fan 14 rotates within the vortex duct 35, driving airflow from the outside into the casing 1, then upwards along the inner cavity of the casing 1 past the motor 11, and finally exiting from the outlet 13 to carry away heat. The principle of the directional airflow generated by the fan 14 and the vortex duct 35, as well as the specific structure of the fan 14, are existing technologies and will not be elaborated here. It should be explained that the fan 14 generates centrifugal force during rotation, causing the airflow in the inner cavity of the casing 1 to be discharged laterally from the outlet 13.

[0043] The first horizontal partition 31, the second horizontal partition 32, and the first vertical partition 33, together with the side wall of the fuselage 1, form a ventilation corridor 37 within the inner cavity of the fuselage 1. A notch 38 on the first horizontal partition 31 connects the ventilation corridor 37 to the inner cavity of the handle 2. The lower end of the heat sink 22 passes through the notch 38, partially placing it within the ventilation corridor 37. A ventilation hole 39 on the first vertical partition 33 connects the vortex air duct 35 and the ventilation corridor 37. It is understood that the ventilation corridor 37 and the vortex air duct 35 are located on opposite sides of the first vertical partition 33, and the ventilation hole 39 connects the ventilation corridor 37 and the vortex air duct 35. When the fan 14 rotates within the vortex air duct 35, most of the airflow is exhausted from the outlet 13. During rotation, the fan 14 generates centrifugal force, driving airflow from the ventilation hole 39 into the ventilation corridor 37, thereby dissipating heat from the heat sink 22 onto the circuit board 21.

[0044] Furthermore, the handle 2 and the body 1 are separated by the aforementioned reinforced keel 3, that is, the ventilation corridor 37 and the vortex air duct 35 are connected only through the ventilation hole 39, which makes the inner cavity of the handle 2 more waterproof and can meet the IPX1 waterproof test standard.

[0045] It is understood that the handle 2 and the body 1 are integrally injection molded hollow structures. The two shells on the left and right are spliced ​​together to form the body 1 and handle 2, which is not sealed. This allows airflow to be blown into the ventilation corridor 37 from the vent, so that the heat can be carried by the airflow to spread throughout the inner cavity of the handle 2. Moreover, this heat can be dissipated through the entire handle 2, avoiding the accumulation of heat on the circuit board 21, which would cause the components to age.

[0046] Furthermore, some micropores are also provided on the handle 2. Of course, these micropores are located on the non-grip parts of the handle 2, so that heat can be dissipated and escape through the micropores.

[0047] The distance between the heat sink 22 and the vortex airflow duct 35 is L, 0.5mm≤L≤2mm. The heat sink 22 and the vortex airflow duct 35 are set close together. By controlling the reasonable distance L, the airflow generated by the fan 14 can pass through the ventilation hole 39 to form a better heat dissipation effect on the heat sink 22.

[0048] The diameter of the ventilation hole 39 is C, where 5mm≤C≤20mm. As mentioned above, the diameter C of the ventilation hole 39 must first meet the heat dissipation requirements of the heat sink 22, that is, the ventilation hole 39 needs to be able to pass through a sufficient air volume. However, the diameter of the ventilation hole 39 cannot be too large. Under the condition of controlling a reasonable diameter C, the mixer can meet the IPX1 waterproof test standard.

[0049] The surface of the heat sink 22 is provided with a plurality of grooves 23. The heat sink 22 can increase its surface area by using the grooves 23, thereby increasing its heat exchange efficiency with the air. Of course, the grooves 23 can also be replaced by fins to achieve the same effect. The advantage of setting the grooves 23 on the surface of the heat sink 22 is that it is easy to process and has a lower cost.

[0050] This invention also includes a stirring rod 4. An output interface 15 is provided at the lower end of the body 1. The motor 11 is connected to the output interface 15, and the stirring rod 4 is mounted on the output interface 15. The motor 11 of the mixer used in this invention has a high output power, which corresponds to significant heat generation on the circuit board 21. Through the above structural design, effective heat dissipation of the circuit board 21 can be achieved within a limited space, thus extending its overall service life.

[0051] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A mixer structure that facilitates heat dissipation, comprising a body (1), a handle (2), a motor (11), and a circuit board (21), wherein the body (1) is connected to the handle (2) and their inner cavities are interconnected, the body (1) is provided with an air inlet (12) and an air outlet (13), and the motor (11) is fixedly disposed in the inner cavity of the body (1); characterized in that, The tail shaft of the motor (11) is equipped with a fan (14), and the fan (14) forms an airflow channel in the inner cavity of the body (1) that leads from the air inlet (12) to the air outlet (13); The circuit board (21) is fixed in the inner cavity of the handle (2), and a heat sink (22) is connected to the circuit board (21). The heat sink (22) is at least partially disposed in the airflow channel.

2. The heat dissipation-friendly mixer structure according to claim 1, characterized in that, The air inlet (12), motor (11), and air outlet (13) are arranged sequentially from bottom to top, and the fan (14) is arranged opposite to the air outlet (13); the handle (2) is connected to the upper end of the body (1), the upper end of the heat sink (22) is connected to the circuit board (21), and the lower end of the heat sink (22) extends into the inner cavity of the body (1) so that it is partially placed in the air flow channel.

3. The heat dissipation-friendly mixer structure according to claim 2, characterized in that, The air outlet (13) is located on one side of the fan (14), and the heat sink (22) is located on the other side of the fan (14). The fan (14) is a centrifugal fan. The airflow channel formed by the fan (14) blows towards the heat sink (22) and enters the inner cavity of the handle (2).

4. The heat dissipation-friendly mixer structure according to claim 2, characterized in that, The inner cavity of the fuselage (1) is provided with a reinforcing keel (3), which includes a first horizontal partition (31) and a second horizontal partition (32). The first horizontal partition (31) and the second horizontal partition (32) are arranged vertically at intervals. A first vertical partition (33) and a second vertical partition (34) are provided between the first horizontal partition (31) and the second horizontal partition (32). The first vertical partition (33) and the second vertical partition (34) are arranged horizontally at intervals. The first horizontal partition (31), the second horizontal partition (32), the first vertical partition (33) and the second vertical partition (34) are respectively connected to the inner wall of the fuselage (1).

5. The heat dissipation-friendly mixer structure according to claim 4, characterized in that, The inner cavity of the fuselage (1) surrounded by the first horizontal partition (31), the second horizontal partition (32), the first vertical partition (33), and the second vertical partition (34) forms a vortex air duct (35). The air outlet (13) is located on the side wall of the fuselage (1) on one side of the vortex air duct (35). A ventilation passage (36) is provided on the second horizontal partition (32). The motor (11) is located in the inner cavity of the fuselage (1) below the reinforcing keel (3). The tail shaft of the motor (11) passes through the ventilation passage (36) so that the fan (14) can be rotatably installed in the vortex air duct (35).

6. The heat dissipation-friendly mixer structure according to claim 5, characterized in that, The first horizontal partition (31), the second horizontal partition (32), the first vertical partition (33) and the inner cavity of the fuselage (1) surrounded by the side wall of the fuselage (1) form a ventilation corridor (37). The first horizontal partition (31) has a notch (38) so that the ventilation corridor (37) connects to the inner cavity of the handle (2). The lower end of the heat sink (22) passes through the notch (38) so that part of it is placed in the ventilation corridor (37). The first vertical partition (33) has a ventilation hole (39) which connects the vortex air duct (35) and the ventilation corridor (37).

7. The heat dissipation-friendly mixer structure according to claim 6, characterized in that, The distance between the heat sink (22) and the vortex air duct (35) is L, and the value of L is 0.5mm≤L≤2mm.

8. The heat dissipation-friendly mixer structure according to claim 6, characterized in that, The diameter of the ventilation hole (39) is C, where 5mm ≤ C ≤ 20mm.

9. The heat dissipation-friendly mixer structure according to claim 6, characterized in that, The surface of the heat sink (22) is provided with several grooves (23).

10. The heat dissipation-friendly mixer structure according to claim 1, characterized in that, It also includes a stirring rod (4), and the lower end of the body (1) is provided with an output interface (15). The motor (11) is connected to the output interface (15) for transmission, and the stirring rod (4) is mounted on the output interface (15).

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