Food processor reliable in heat dissipation

Abstract

The utility model belongs to the technical field of food processing devices, and discloses a food processor reliable in heat dissipation, which comprises a main machine, a power panel arranged in the main machine, and a cup assembly detachably mounted above the main machine, the cup assembly comprises a cup body, a cup seat fixed at the bottom of the cup body, and a frequency conversion brushless motor fixed in the cup seat, a rotating shaft of the variable-frequency brushless motor extends into the cup body and is connected with a smashing knife, a heat dissipation opening for heat dissipation of the variable-frequency brushless motor is formed in the bottom of the cup base, an IPM module electrically connected with the variable-frequency brushless motor is arranged on the power panel, and the host is provided with a first air channel for heat dissipation of the IPM module. The host is further provided with a second air channel which enables the heat dissipation opening to be communicated with the outside so as to dissipate heat of the frequency conversion brushless motor, and the first air channel and the second air channel are isolated from each other. Independent and efficient heat dissipation of the power panel and the motor is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of food processing devices, and in particular relates to a food processing machine with reliable heat dissipation. Background Art

[0002] The existing food processing machine sets the cup body and the main machine in a detachable connection mode, so that the user can take off the cup body separately for feeding or cleaning. For example, the prior art discloses a wall-breaking food processor with an air inlet pipe, including a base and a cup body assembly, a main control board is arranged in the base, the cup body assembly includes a cup body and a cup seat, the cup seat is provided with a support cavity and a motor fixing seat located in the support cavity, the motor is fixed on the motor fixing seat, so that the motor and the cup body assembly are connected as a whole, and the base is provided with a fan, and the indoor air is used to enter the base from the indoor air inlet of the base, and then enter the cup seat through the air inlet pipe to dissipate the heat of the motor. After passing through the motor, the airflow enters the base through the air outlet of the air guide plate and is discharged through the base. Since the food processors in the prior art are generally driven by series-excited motors based on product pricing restrictions and simple driving requirements, the main control board does not generate much heat and does not require too strong heat dissipation airflow. Therefore, the airflow through the motor can not pass through the control board, and the heat dissipation of the control board can be achieved by only using the space in the base. Of course, the airflow flowing through the motor can enter the base through the air outlet of the air guide plate, and can further flow through the main control board before being discharged. In this solution, since the indoor air takes away the heat of the motor after passing through the motor to achieve heat exchange, although it can have a heat dissipation effect on the motor, the air is heated at the same time. When the air passes through the main control board again, the heat exchange efficiency becomes low, and the heat dissipation efficiency of the main control board is poor. However, for the solution of the prior art, the air flows through the stator coil of the series-excited motor to achieve heat dissipation and does not have much impact on the temperature rise of the main control board.

[0003] However, with the continuous development and innovation of food processors and the increasing needs of users, the traditional series-excited motor cannot meet the needs of users due to its large size, inconvenient assembly and unstable speed control. The applicant has developed a food processor using a variable frequency brushless motor. This type of food processor uses a variable frequency brushless motor to achieve drive. It is small in size, has constant and controllable speed and torque, and has low working vibration and low noise, which improves the user experience of the food processor. However, compared with the existing series-excited motor, the variable frequency brushless motor needs to set an IPM module on the main control board to achieve drive. The IPM module is an intelligent power module, which is a highly integrated power electronic device that integrates power switching devices, drive circuits, and fault detection circuits such as overvoltage, overcurrent and overheating. At the same time, compared with the traditional control board solution in the prior art based on no heat or only a small amount of controllable heat, the IPM module will generate strong heat during operation, and the variable frequency brushless motor will have a significant decrease in heat generation compared to the existing series-excited motor. Therefore, if the traditional heat dissipation method is adopted, and the variable frequency brushless motor and the IPM module are set in the same heat dissipation channel, no matter whether the variable frequency brushless motor is set upstream or the IPM module is set upstream, it will cause the IPM module to be cooled by the heat dissipation airflow of the motor or the heat dissipation airflow of the main control board to be used to cool the motor, thereby making the heat dissipation effect of the latter unsatisfactory, the heat dissipation interferes with each other, the heat dissipation is slow, and even the temperature cannot be effectively reduced, resulting in overheating and damage of the motor and the main control board, affecting the service life of the whole machine. Utility Model Content

[0004] The utility model provides a food processing machine with reliable heat dissipation, which uses a variable frequency brushless motor to realize driving. On the basis of using the variable frequency brushless motor, the variable frequency brushless motor and the IPM module are respectively placed in the cup component and the main machine, and different heat dissipation paths are further arranged to solve systematic heat dissipation problems such as changes in the motor, changes in the control module, and optimization of the heat dissipation duct, so as to realize independent and efficient heat dissipation of the power board and the motor.

[0005] The technical solution adopted by the utility model is:

[0006] The utility model provides a food processing machine with reliable heat dissipation, comprising a main machine, a power supply board arranged in the main machine, and a cup assembly detachably mounted above the main machine, wherein the cup assembly comprises a cup body, a cup seat fixed at the bottom of the cup body, and a variable frequency brushless motor fixed in the cup seat, the rotating shaft of the variable frequency brushless motor extends into the cup body and is connected with a crushing knife, the bottom of the cup seat is provided with a heat dissipation port for dissipating heat of the variable frequency brushless motor, the power supply board is provided with an IPM module electrically connected to the variable frequency brushless motor, the main machine is provided with a first air duct for dissipating heat of the IPM module, the main machine is also provided with a second air duct connecting the heat dissipation port with the outside to dissipate heat of the variable frequency brushless motor, and the first air duct and the second air duct are isolated from each other.

[0007] The food processing machine provided by the utility model has a cup assembly that is detachably mounted above the main machine, and the user can flexibly remove the cup assembly for cleaning or feeding, and the operation is flexible and convenient. The cup assembly includes a variable frequency brushless motor fixed in the cup holder. Compared with the traditional series-excited motor, the variable frequency brushless motor has a coil that is generally convexly arranged outside the stator, and the coil needs to be installed in a avoided manner. Therefore, the use of a variable frequency brushless motor is beneficial to improving the space utilization rate of the entire machine, facilitating compact installation to reduce the size of the entire cup assembly, avoiding too much burden on user operation, and facilitating user mobile operation. On this basis, since both the variable frequency brushless motor and the IPM module electrically connected to the variable frequency brushless motor will have a large working heat, the host is provided with a first air duct for dissipating heat for the IPM module, and the host is also provided with a second air duct that connects the heat dissipation port with the outside to dissipate heat for the variable frequency brushless motor. The first air duct and the second air duct are isolated from each other, and the first air duct is used to achieve independent heat dissipation of the IPM module. The cold air from the outside is directly discharged through the IPM module in the first air duct, thereby reducing the residence time of hot air and achieving efficient heat dissipation of the IPM module and the power board. At the same time, after the cup assembly is installed, the second air duct is used to still independently dissipate heat for the variable frequency brushless motor in the cup holder. The cold air from the outside enters the cup holder through the second air duct and the heat dissipation port, and is directly discharged after flowing through the variable frequency brushless motor, thereby reducing the residence time of hot air and achieving efficient heat dissipation of the motor. The first air duct and the second air duct are isolated from each other to avoid interference of the hot air that has been heat exchanged with the components to be dissipated, reduce heat dissipation interference, greatly improve the heat dissipation effect and reliability of the power board and the motor, and achieve rapid heat dissipation and life extension of the whole machine.

[0008] In a preferred embodiment, the second air duct includes an air inlet channel and an air outlet channel that are isolated from each other.

[0009] The isolated air inlet and outlet channels can ensure that cold air and hot air circulate separately, avoiding the mixing of cold and hot air, thereby improving the heat dissipation efficiency. The cold air can directly enter the cup holder and effectively take away the heat of the motor, while the hot air is discharged through the independent air outlet channel, reducing the retention of hot air in the cup holder and the motor, further enhancing the heat dissipation effect. The isolated air inlet and outlet channels can reduce turbulence and airflow interference in the air duct, making the airflow more stable and orderly, helping to reduce wind resistance and pressure loss in the air duct, and at the same time, reducing exhaust noise.

[0010] In a preferred embodiment, a mounting bracket for fixing the power board is provided in the host, and the mounting bracket is integrally provided with an air guide tube, and the air guide tube defines the air inlet channel or the air outlet channel.

[0011] By providing a mounting bracket, the power board can be reliably fixed in the main unit. At the same time, the mounting bracket is integrally provided with an air guide tube to define an air inlet channel or an air outlet channel, so that the mounting bracket integrates the heat dissipation air duct for the variable frequency brushless motor, and no separate air duct is required, thereby achieving structural integration, making the internal structure of the main unit compact, reducing the size of the main unit, saving floor space, and facilitating user storage.

[0012] In a preferred embodiment, a mounting bracket for fixing the power board is provided in the host, and the mounting bracket is provided with a mounting groove for accommodating the power board, and the mounting groove and the bottom wall of the host form the first air duct.

[0013] By providing a mounting bracket, the power board can be reliably fixed in the host. At the same time, the mounting bracket is provided with a mounting groove for accommodating the power board. The mounting groove and the bottom wall of the host form the first air duct, which is conducive to concentrating the heat dissipation airflow of the power board, thereby guiding the heat dissipation airflow to the power board, especially the IPM module, increasing the contact area between the cold air and the power board, and improving the heat dissipation efficiency. The concentrated airflow can more effectively take away the heat generated by the power board and the IPM module, reduce the temperature, and ensure the normal operation of the power board.

[0014] In a preferred embodiment, the host comprises a shell with an open lower end and a base enclosed at the bottom of the shell, and the base is fixed with an extension tube extending from bottom to top, and the extension tube defines the air inlet channel or the air outlet channel.

[0015] The main unit is provided as a shell and a base, so as to facilitate the installation of a power board or other components inside the main unit, and an extension tube provided on the base is used to form an air inlet channel or the air outlet channel, so as to simplify the structure, reduce the cost, and realize reliable heat dissipation of the variable frequency brushless motor.

[0016] In a preferred embodiment, the heat dissipation port includes a first heat dissipation port communicated with the air inlet channel and a second heat dissipation port communicated with the air outlet channel.

[0017] By setting the heat dissipation port as a first heat dissipation port connected to the air inlet channel and a second heat dissipation port connected to the air outlet channel, the first heat dissipation port and the second heat dissipation port are separated and cooperate with the air inlet channel and the air outlet channel respectively, so that the cold air entering from the host to the cup holder and the hot air discharged from the cup holder to the host can circulate separately, avoiding the mixing of cold and hot air, thereby improving the heat dissipation efficiency. The cold air can directly enter the cup holder and effectively take away the heat of the motor, while the hot air is discharged through the independent air outlet channel, reducing the retention of hot air in the cup holder and the motor, and further enhancing the heat dissipation effect. Making the airflow more stable and orderly helps to reduce the wind resistance and pressure loss in the air duct, and at the same time, reduces the exhaust noise.

[0018] In a preferred embodiment, the power board is placed horizontally in the main unit, and the inlet of the first air duct is opened on the bottom wall of the main unit and is arranged directly below the IPM module.

[0019] By placing the power board horizontally and opening the inlet of the first air duct on the bottom wall of the main unit and facing the bottom of the IPM module, it is beneficial to expand the contact connection between the cold air entering through the inlet of the first air duct and the power board, thereby improving the heat dissipation efficiency. At the same time, the inlet faces the bottom of the IPM module, the heat dissipation is direct and efficient, and the base structure is simplified.

[0020] In a preferred embodiment, a first fan is provided in the first air duct.

[0021] The first fan can increase the air velocity and flow rate in the first air duct, and effectively take away the heat of the IPM module by quickly circulating the air, thereby enhancing the heat dissipation effect. Faster air flow helps to dissipate heat more efficiently, prevent the power board from overheating and damage, and extend the service life of the power board.

[0022] In a preferred embodiment, the support surface of the host is provided with an upwardly protruding boss, the side wall of the boss is provided with a transverse opening, and the heat dissipation port and the second air duct are connected through the opening.

[0023] By arranging the side wall of the boss laterally at the opening, the heat dissipation port and the second air duct can be connected through the opening to achieve reliable heat dissipation of the variable frequency brushless motor. At the same time, it can also prevent liquid or dust from entering the second channel when the opening is facing upward, thereby reducing the risk of water entering the host and providing a reliable structure.

[0024] In a preferred embodiment, a vent is provided on the side wall of the main unit, and the vent forms an inlet or an outlet of the second air duct.

[0025] By setting the vents on the side walls of the main unit, water can be prevented from accumulating on the work surface of the food processor and entering the vents, thereby improving the waterproof effect of the main unit and preventing foreign matter from clogging the second channel and affecting heat dissipation. In addition, if the vents are often the outlet of the second air duct, the heat dissipation airflow can be discharged from the side walls of the main unit, thereby preventing the work surface from being heated, ensuring smooth heat dissipation and protecting the work surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0027] Figure 1 This is a structural schematic diagram of a food processing machine in one embodiment of the utility model;

[0028] Figure 2 This is a schematic cross-sectional structure diagram of a food processing machine in one embodiment of the utility model;

[0029] Figure 3 It is a schematic cross-sectional structure diagram of a food processor at another angle in one embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the cooperation between the cup holder and the host in one embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the partial structure explosion of the host in one embodiment of the utility model.

[0032] Explanation of the reference numerals: 10. host; 11. power board; 12. mounting bracket; 101. housing; 102. base; 103. vent; 104. boss; 105. opening; 20. cup assembly; 21. cup body; 22. cup holder; 221. first heat dissipation port; 222. second heat dissipation port; 23. variable frequency brushless motor; 24. crushing knife; 30. first air duct; 40. second air duct; 41. air inlet channel; 42. air outlet channel. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present invention and the features in each embodiment may be combined with each other without conflict.

[0035] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0038] like Figure 1-5As shown, the utility model provides a food processing machine with reliable heat dissipation, including a host 10, a power board 11 arranged in the host 10, and a cup assembly 20 detachably mounted above the host 10, the cup assembly 20 including a cup body 21, a cup holder 22 fixed at the bottom of the cup body 21, and a variable frequency brushless motor 23 fixed in the cup holder 22, the rotating shaft of the variable frequency brushless motor 23 extends into the cup body 21 and is connected to a crushing knife 24, the bottom of the cup holder 22 is provided with a heat dissipation port for heat dissipation of the variable frequency brushless motor 23, and the power board 11 is provided with an IPM module (not shown) electrically connected to the variable frequency brushless motor 23, as shown in FIG. Figure 2 As shown, the host 10 is provided with a first air duct 30 for dissipating heat from the IPM module, and the host 10 is also provided with a second air duct 40 that connects the heat dissipation port with the outside to dissipate heat from the variable frequency brushless motor 23, and the first air duct 30 and the second air duct 40 are isolated from each other.

[0039] The food processing machine provided by the utility model has a cup assembly 20 that is detachably mounted above the main machine 10. The user can flexibly remove the cup assembly 20 for cleaning or feeding, and the operation is flexible and convenient. The cup assembly 20 includes a variable frequency brushless motor 23 fixed in the cup holder 22. Compared with the traditional series-excited motor, the variable frequency brushless motor 23 has a coil that is generally convexly arranged outside the stator, and the coil needs to be installed in a avoided manner. Therefore, the use of the variable frequency brushless motor 23 is beneficial to improving the space utilization rate of the whole machine, facilitating compact installation to reduce the size of the entire cup assembly 20, avoiding too much burden on user operation, and facilitating user mobile operation. On this basis, since the variable frequency brushless motor 23 and the IPM module electrically connected to the variable frequency brushless motor 23 both have a large amount of working heat, the host 10 is provided with a first air duct 30 for dissipating heat for the IPM module, and the host 10 is also provided with a second air duct 40 that connects the heat dissipation port with the outside to dissipate heat for the variable frequency brushless motor 23. The first air duct 30 and the second air duct 40 are isolated from each other, and the first air duct 30 is used to realize the independent heat dissipation of the IPM module. The cold air from the outside is directly discharged through the IPM module in the first air duct 30, thereby reducing the residence time of hot air and realizing the IPM module and the power board 11. Efficient heat dissipation. At the same time, after the cup assembly 20 is installed, the variable frequency brushless motor 23 in the cup holder 22 is still cooled separately by the second air duct 40. The cold air from the outside enters the cup holder 22 through the second air duct 40 and the heat dissipation port, and is directly discharged after flowing through the variable frequency brushless motor 23, thereby reducing the residence time of hot air and achieving efficient heat dissipation of the motor. The first air duct 30 and the second air duct 40 are isolated from each other to avoid the hot air that has been heat exchanged from interfering with the components to be cooled, thereby reducing heat dissipation interference, greatly improving the heat dissipation effect and reliability of the power board 11 and the motor, and achieving rapid heat dissipation and life extension of the entire machine.

[0040] In a preferred embodiment, Figure 2 , Figure 3As shown, the second air duct 40 includes an air inlet channel 41 and an air outlet channel 42 which are isolated from each other. More preferably, a mounting bracket 12 for fixing the power board 11 is provided in the host 10, and the mounting bracket 12 is integrally provided with an air guide tube, which defines the air inlet channel 41 or the air outlet channel 42. Specifically, as Figure 2 As shown, the air guide tube defines an air inlet channel 41. More preferably, the mounting bracket 12 is provided with a mounting groove for accommodating the power board 11, and the mounting groove and the bottom wall of the host 10 form the first air duct 30. The mounting bracket 12 is rationally utilized.

[0041] It is understandable that the air inlet channel 41 and the air outlet channel 42 are not limited to being implemented by the air guide tube. For example, in a preferred embodiment, Figure 4 , 5 As shown, the host 10 includes a housing 101 with an open lower end and a base 102 enclosed at the bottom of the housing 101. The base 102 is fixed with an extension tube extending from bottom to top, and the extension tube defines an air inlet channel 41 or an air outlet channel 42. Specifically, as Figure 3 As shown, the extension tube defines an air outlet passage 42 .

[0042] exist Figure 1-5 In the illustrated embodiment, the air inlet channel 41 is defined by the air guide tube, and the extension tube defines the air outlet channel 42 .

[0043] In fact, the air inlet channel 41 and the air outlet channel 42 can be swapped; or, two air guide tubes are set on the mounting bracket 12 to form the air inlet channel 41 and the air outlet channel 42 respectively; or, two extension tubes are set to form the air inlet channel 41 and the air outlet channel 42 respectively.

[0044] In addition, the extension tube is not limited to the above-mentioned fixing method. For example, the extension tube can also extend downward from the shell 101, or the extension tube is formed by connecting a first section arranged on the shell 101 and a second section arranged on the base 102.

[0045] By setting up the isolated air inlet channel 41 and air outlet channel 42, it is possible to ensure that cold air and hot air circulate separately to avoid mixing of cold and hot air, thereby improving the heat dissipation efficiency. Cold air can directly enter the cup holder 22 and effectively take away the heat of the motor, while hot air is discharged through the independent air outlet channel 42, reducing the retention of hot air in the cup holder 22 and the motor, further enhancing the heat dissipation effect. The isolated air inlet channel 41 and air outlet channel 42 can reduce turbulence and airflow interference in the air duct, making the airflow more stable and orderly, helping to reduce wind resistance and pressure loss in the air duct, and at the same time, reducing exhaust noise.

[0046] By setting the mounting bracket 12, the power board 11 can be reliably fixed in the host 10. At the same time, the mounting bracket 12 is integrally provided with an air guide tube to define an air inlet channel 41 or an air outlet channel 42, so that the mounting bracket 12 integrates the heat dissipation air duct for the variable frequency brushless motor 23, and no separate air duct is required, thereby realizing structural integration, which is beneficial to the compactness of the structure inside the host 10, and is beneficial to reducing the size of the host 10, saving floor space, and convenient for users to store. The host 10 is provided with a housing 101 and a base 102, so that it is convenient to install the power board 11 or other components inside the host 10, and the extension tube provided on the base 102 is used to form the air inlet channel 41 or the air outlet channel 42, so that the structure is simplified, the cost is reduced, and reliable heat dissipation of the variable frequency brushless motor 23 is realized.

[0047] In a preferred embodiment, Figure 4 As shown, a vent 103 is provided on the side wall of the host 10, and the vent forms the entrance or exit of the second air duct 40, that is, the vent forms the entrance of the air inlet channel 41 or the exit of the air outlet channel 42. Figure 3 As shown, the vent is the outlet of the air outlet channel 42 .

[0048] By setting the vents on the side walls of the main unit 10, water can be prevented from accumulating on the work surface of the food processor and entering the vents, thereby improving the waterproof effect of the main unit 10 and preventing foreign objects from clogging the second channel and affecting heat dissipation. In addition, if the vents are often the outlet of the second air duct 40, the heat dissipation airflow can be discharged from the side walls of the main unit 10, thereby preventing the work surface from being heated, ensuring smooth heat dissipation and protecting the work surface.

[0049] Of course, if Figure 1-5 In the embodiment shown, the second channel includes an air inlet channel 41 and an air outlet channel 42 which are isolated from each other. Therefore, optionally, as Figure 4 As shown, the heat dissipation port includes a first heat dissipation port 221 communicating with the air inlet channel 41 and a second heat dissipation port 222 communicating with the air outlet channel 42 .

[0050] By setting the heat dissipation port as a first heat dissipation port connected to the air inlet channel 41 and a second heat dissipation port connected to the air outlet channel 42, the first heat dissipation port and the second heat dissipation port are separated and cooperate with the air inlet channel 41 and the air outlet channel 42 respectively, so that the cold air entering from the host 10 to the cup holder 22 and the hot air discharged from the cup holder 22 to the host 10 are circulated separately, avoiding the mixing of cold and hot air, thereby improving the heat dissipation efficiency. The cold air can directly enter the cup holder 22 and effectively take away the heat of the motor, while the hot air is discharged through the independent air outlet channel 42, reducing the retention of hot air in the cup holder 22 and the motor, and further enhancing the heat dissipation effect. Making the airflow more stable and orderly helps to reduce the wind resistance and pressure loss in the air duct, and at the same time, reduces the exhaust noise.

[0051] Of course, in practice, the air inlet channel 41 and the air outlet channel 42 can also share a heat dissipation port of the cup holder 22 to achieve heat dissipation for the variable frequency brushless motor 23 .

[0052] Correspondingly, an opening needs to be provided on the support surface of the host 10 for the heat dissipation outlet to communicate with the second air duct 40. For example, in a preferred embodiment, Figure 4 As shown, the support surface of the host 10 is provided with an upwardly protruding boss 104 , and the side wall of the boss is provided with a transverse opening 105 , and the first heat dissipation port 221 and the second air duct 40 are connected through the opening 105 .

[0053] By arranging the side wall of the boss laterally at the opening, the heat dissipation port and the second air duct 40 can be connected through the opening to achieve reliable heat dissipation of the variable frequency brushless motor 23. At the same time, it can also prevent liquid or dust from entering the second channel when the opening is facing upward, thereby reducing the risk of water entering the host 10 and ensuring a reliable structure.

[0054] Of course, it should be noted that the second air duct 40 can also be selected as a single channel shared by the air inlet and the air outlet to simplify the overall structure and reduce costs.

[0055] In addition, the structures of the first air duct 30 and the second air duct 40 in the present invention are independent and may not be limited to the above-mentioned combination. For example, when the second air duct 40 adopts other methods different from the above-mentioned, a mounting bracket 12 for fixing the power board 11 may be separately provided in the main unit 10, and the mounting bracket 12 is provided with a mounting groove for accommodating the power board 11, and the mounting groove and the bottom wall of the main unit 10 enclose the first air duct 30, and optionally, the bottom wall of the main unit 10 is provided with an air outlet connected to the first air duct 30, and optionally, the mounting bracket 12 is provided with an air hole.

[0056] By providing the mounting bracket 12, the power board 11 can be reliably fixed in the host 10. At the same time, the mounting bracket 12 is provided with a mounting groove for accommodating the power board 11. The mounting groove and the bottom wall of the host 10 form a first air duct 30, which is conducive to concentrating the heat dissipation airflow of the power board 11, thereby guiding the heat dissipation airflow to the power board 11, especially the IPM module, increasing the contact area between the cold air and the power board 11, and improving the heat dissipation efficiency. The concentrated airflow can more effectively take away the heat generated by the power board 11 and the IPM module, reduce the temperature, and ensure the normal operation of the power board 11.

[0057] It is understandable that the first air duct 30 may also be arranged with reference to the structure of the second air duct 40 , and the inner diameter of the second air duct 40 may be correspondingly enlarged to accommodate the power board.

[0058] In a preferred embodiment, the power board 11 is placed horizontally in the main unit 10, and the inlet of the first air duct 30 is opened on the bottom wall of the main unit 10 and is arranged directly below the IPM module. The power board 11 is fixed by a mounting bracket 12 or the power board 11 is directly fixed in the main unit 10 by screws.

[0059] By placing the power board 11 horizontally and opening the inlet of the first air duct 30 on the bottom wall of the main unit 10 and facing the bottom of the IPM module, it is beneficial to expand the contact connection between the cold air entering the inlet of the first air duct 30 and the power board 11, thereby improving the heat dissipation efficiency. At the same time, the inlet faces the bottom of the IPM module, the heat dissipation is direct and efficient, and the structure of the base 102 is simplified.

[0060] Of course, as a preferred embodiment, a first fan is provided in the first air duct 30 .

[0061] The first fan can increase the air velocity and flow rate in the first air duct 30, and effectively take away the heat of the IPM module by quickly circulating the air, thereby enhancing the heat dissipation effect. Faster air flow helps to dissipate heat more efficiently, prevent the power board 11 from overheating and damage, and extend the service life of the power board 11.

[0062] It is understandable that in order to accelerate the gas flow in the second air duct 40, a second fan can be separately provided in the second air duct 40. Preferably, the second fan is driven by the shaft of the variable frequency brushless motor 23, which simplifies the overall structure, reduces costs, and achieves good heat dissipation.

[0063] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0064] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0065] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A food processing machine with reliable heat dissipation, comprising a main machine, a power board arranged in the main machine, and a cup assembly detachably mounted above the main machine, characterized in that: The cup assembly includes a cup body, a cup seat fixed at the bottom of the cup body, and a variable frequency brushless motor fixed in the cup seat, the rotating shaft of the variable frequency brushless motor extends into the cup body and is connected to a crushing knife, the bottom of the cup seat is provided with a heat dissipation port for dissipating heat of the variable frequency brushless motor, the power board is provided with an IPM module electrically connected to the variable frequency brushless motor, the host is provided with a first air duct for dissipating heat from the IPM module, and the host is also provided with a second air duct connecting the heat dissipation port with the outside to dissipate heat from the variable frequency brushless motor, and the first air duct and the second air duct are isolated from each other.

2. A food processor with reliable heat dissipation according to claim 1, characterized in that: The second air duct includes an air inlet channel and an air outlet channel which are isolated from each other.

3. A food processing machine with reliable heat dissipation according to claim 2, characterized in that: A mounting bracket for fixing the power board is also provided in the host, and an air guide tube is integrally provided on the mounting bracket, and the air guide tube defines the air inlet channel or the air outlet channel.

4. A food processor with reliable heat dissipation according to claim 1 or 3, characterized in that: A mounting bracket for fixing the power board is also provided in the host, and the mounting bracket is provided with a mounting groove for accommodating the power board, and the mounting groove and the bottom wall of the host form the first air duct.

5. A food processor with reliable heat dissipation according to claim 2, characterized in that: The host comprises a shell with an open lower end and a base enclosed at the bottom of the shell, and the base is fixed with an extension tube extending from bottom to top, and the extension tube defines the air inlet channel or the air outlet channel.

6. A food processing machine with reliable heat dissipation according to claim 2, characterized in that: The heat dissipation port includes a first heat dissipation port communicated with the air inlet channel and a second heat dissipation port communicated with the air outlet channel.

7. A food processor with reliable heat dissipation according to claim 1, characterized in that: The power board is horizontally placed in the main unit, and the inlet of the first air duct is opened on the bottom wall of the main unit and is arranged directly below the IPM module.

8. A food processor with reliable heat dissipation according to claim 1, characterized in that: A first fan is disposed in the first air duct.

9. A food processor with reliable heat dissipation according to claim 1, characterized in that: The support surface of the host is provided with an upwardly protruding boss, the side wall of the boss is provided with a transverse opening, and the heat dissipation port and the second air duct are connected through the opening.

10. A food processor with reliable heat dissipation according to claim 1, characterized in that: A vent is provided on the side wall of the main unit, and the vent forms an inlet or an outlet of the second air duct.

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