A light and reliable food processor

Abstract

This utility model discloses a lightweight and reliable food processing machine, including a cup body in the upper section and a base in the lower section. The cup body has a grinding chamber and a grinding device located in the grinding chamber. The base includes a housing and a brushless motor and a control board disposed within the housing. The motor shaft of the brushless motor extends into the grinding chamber and is connected to the grinding device for transmission. The control board is disposed below the brushless motor and is electrically connected to the brushless motor. The base has a heat dissipation duct that sequentially connects the control board and the brushless motor. The heat dissipation duct includes a front heat dissipation section that at least partially covers the control board, a transmission section that passes through the control board axially, and a rear heat dissipation section located within the brushless motor. The base also includes a socket located on the side wall of the housing for external electrical connection. The socket has an air inlet and an air outlet connected to the heat dissipation duct around its periphery. By utilizing the arrangement of the brushless motor and the control board, a sequentially connected air inlet, air outlet, and heat dissipation duct are formed, compressing the product volume, improving heat dissipation, and ensuring product safety.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, and in particular to a portable food processing machine using a variable frequency brushless motor. Background Technology

[0002] Conventional food processors typically include a main unit and a mixing cup assembly mounted on the main unit. The main unit contains a motor, and the mixing cup assembly has a grinding chamber and grinding blades located within the grinding chamber. When using the food processor, the user places ingredients into the grinding chamber and then assembles the mixing cup assembly onto the main unit. The motor drives the grinding blades to grind the ingredients. With the expansion of user usage, there is a growing demand for portable food processors to meet the needs of travel. Based on this, existing technologies have developed miniaturized, portable food processors. For example, the applicant's earlier patent application CN216823052U discloses a portable soymilk maker, which is cup-shaped with a lid. Users can secure the lid to the cup to seal the grinding chamber when carrying it. Meanwhile, in order to power electrical components such as motors, manufacturers usually install a socket on the casing of the main unit that is electrically connected to the motor. Users can plug the plug into the socket to make it powered. In addition, some models have a battery inside the main unit that is electrically connected to the motor so that they can work without being plugged in when carried around. The socket is also electrically connected to the battery, allowing users to charge the battery through the socket and power the motor and other electrical components through the battery to meet the user's needs.

[0003] However, the usage scenarios and environments of portable food processors differ significantly from those of traditional food processors. Portable food processors require a smaller overall size, more stable and quiet operation, and higher waterproofing requirements to prevent water from entering the main unit during transport and cleaning. Existing portable food processor solutions simply compress the base for portability, leading to incompatibility between the base and the motor, as well as reduced motor heat dissipation, increased vibration, and noise. While existing technologies upgrade the motor to a variable frequency brushless motor to improve operational stability and reduce noise, brushless motors require a matching control board. This necessitates heat dissipation for both the control board and the brushless motor, requiring a more complex cooling structure. This involves installing multiple structural components within a smaller space, including the brushless motor, the control board, and the power socket, while also utilizing the limited space outside these components for heat dissipation. Furthermore, it's crucial to meet the waterproofing requirements of the food processor while simultaneously ensuring adequate heat dissipation. Multiple overlapping and conflicting technical requirements mean that existing portable food processing machines can only meet some of the requirements while abandoning or weakening others, thus reducing product quality. Utility Model Content

[0004] The purpose of this utility model is to provide a lightweight and reliable food processing machine, which solves the technical problems of poor heat dissipation, high noise, and poor waterproofing caused by the limited motor installation structure of existing food processing machines, while meeting the requirements of easy portability.

[0005] To solve the above-mentioned technical problems, this utility model provides a lightweight and reliable food processing machine. The food processing machine includes a cup body located in the upper section and a base located in the lower section. The cup body is provided with a crushing chamber and a crushing device located in the crushing chamber. The base includes a housing and a brushless motor and a control board disposed in the housing. The motor shaft of the brushless motor extends into the crushing chamber and is connected to the crushing device for transmission. The control board is disposed below the brushless motor and is electrically connected to the brushless motor. The base is provided with a heat dissipation duct that sequentially connects the control board and the brushless motor. The heat dissipation duct includes a front heat dissipation section that at least partially covers the control board, a transmission section that passes through the control board axially, and a rear heat dissipation section located in the brushless motor. The base also includes a socket located on the side wall of the housing for external electrical connection. The socket has an air inlet and an air outlet that communicate with the heat dissipation duct. Airflow flows in from the air inlet, passes through the front heat dissipation section, the transmission section, and the rear heat dissipation section, and then flows out from the air outlet.

[0006] Preferably, the transmission section surrounds the outer periphery of the brushless motor and extends to the top of the brushless motor to communicate with the rear heat dissipation section, which extends along the axial direction of the brushless motor and is opposite to the flow direction of the transmission section.

[0007] Preferably, the base is further provided with a motor bracket installed at the bottom of the brushless motor, the motor bracket being sleeved on the bottom of the stator of the brushless motor to connect the rear heat dissipation section and the air outlet.

[0008] Preferably, the bottom of the rotor of the brushless motor is provided with a fan located inside the motor bracket, the side wall of the motor bracket is provided with a ventilation opening, and the base is also provided with an air outlet pipe connecting the ventilation opening and the air outlet.

[0009] Preferably, the base is further provided with a fixed bracket located between the brushless motor and the control board. The fixed bracket divides the base into two parts, which respectively accommodate the brushless motor and the control board. The fixed bracket and the housing form part of the transmission section.

[0010] Preferably, the bottom surface of the fixed bracket is provided with a downwardly extending baffle, the baffle forming a mounting cavity for mounting the control panel, and the transmission section includes a channel formed between the baffle and the housing.

[0011] Preferably, the control board includes an IPM module and a capacitor module. The IPM module has heat dissipation fins. Both the capacitor module and the heat dissipation fins are arranged downwards, and the air inlet faces the capacitor module and the heat dissipation fins.

[0012] Preferably, the food processing machine further includes a shielding cover disposed on the outside of the machine base, the shielding cover being able to close the air inlet, air outlet and socket.

[0013] The air inlet and air outlet are located on the upper and lower sides of the socket, respectively, and the external connector separates the air inlet and air outlet when inserted into the socket.

[0014] One end of the cover is connected to the housing, and the other end is a free end. A pre-tightening structure is provided between the cover and the housing so that the cover can close the air inlet, air outlet and socket when it is in a free state.

[0015] Preferably, the housing is provided with a limiting groove for installing the socket, and the base is also provided with an air inlet pipe located at the air inlet and an air outlet pipe located at the air outlet, the air inlet pipe and the air outlet pipe being located on both sides of the socket to clamp the socket.

[0016] After adopting the above technical solution, this utility model has the following technical advantages.

[0017] 1. The food processing machine described in this application employs a higher-performance brushless motor and a control board for driving the brushless motor to improve its performance. The brushless motor enables variable frequency control, ensuring stable and reliable output speed and torque, allowing the food processing machine to reliably perform pulverization. Furthermore, the brushless motor operates smoothly with less noise, reducing the overall operating noise of the food processing machine. Using a brushless motor, this application first mounts the control board below the brushless motor to compress the radial dimension of the machine base, making it easier for users to hold and carry. Furthermore, a heat dissipation duct is provided within the machine base, sequentially connecting the control board and the brushless motor. This duct includes a front heat dissipation section covering the control board, a transmission section passing axially through the control board, and a rear heat dissipation section located within the brushless motor. Each heat dissipation section sequentially cools the respective functional components and fully utilizes the space created within the housing when the brushless motor and control board are mounted on the machine base, eliminating the need for additional heat dissipation space and thus avoiding increasing the overall size of the machine base and the food processor. Finally, this application further utilizes existing sockets, providing air inlets and outlets connected to the heat dissipation duct on the outer periphery of the socket. This ensures that when assembling the food processor with the socket, the air inlets and outlets connected to the heat dissipation duct can be reliably configured, guaranteeing stable and reliable heat dissipation for the food processor. Meanwhile, sockets used for electrical connections typically require reliable waterproofing to prevent the risk of electric leakage. Therefore, the air inlet and outlet can be waterproofed using the socket's waterproof structure, resulting in a simple, stable, and reliable design. Furthermore, airflow enters the base from the bottom through the air inlet, flows sequentially through the front heat dissipation section to cool the control board, then through the transmission section to the rear heat dissipation section, cools the brushless motor through the rear heat dissipation section, and finally exits the base through the outlet at the socket location. The air inlet and outlet are positioned at the socket location.

[0018] 2. Furthermore, the transmission section surrounds the outer periphery of the brushless motor and extends to the top of the brushless motor. The cooling airflow enters the interior of the brushless motor from the top and then flows past it. The flow direction of the rear cooling section is opposite to that of the transmission section, forming a double-layer cooling system for the motor, resulting in higher cooling efficiency and more thorough heat dissipation. Moreover, the transmission section surrounding the brushless motor ensures that the entire interior cavity of the food processor's base can be cooled. This avoids the poor cooling effect caused by insufficient airflow between the brushless motor and the housing when airflow directly enters the brushless motor from the bottom, which would lead to a gradual increase in the outer surface temperature of the base and affect the user's grip.

[0019] 3. Generally, the stator and rotor of the motor require precise matching. The rear heat dissipation section is formed by utilizing the structure of the stator and rotor themselves, as well as the gap between them. This ensures stable and reliable operation of the brushless motor while efficiently dissipating heat from both the stator and rotor. Furthermore, a motor bracket is installed at the bottom of the brushless motor, fitted around the bottom periphery of the stator. The bracket does not affect the structural installation of the brushless motor itself and can cover and seal the bottom opening of the motor, connecting the rear heat dissipation section and the air outlet within the motor body. This ensures a continuous and uninterrupted heat dissipation path for the entire food processing machine, improving heat dissipation efficiency.

[0020] 4. The brushless motor generates heat during operation, and the control board only heats up when driving the brushless motor. Therefore, the brushless motor and control board primarily generate heat during operation. A fan is directly installed at the bottom of the motor rotor, allowing the motor to synchronously drive the fan during operation, thus promoting airflow between the control board and the motor and dissipating heat from both. The motor bracket is preferably clamped between the brushless motor and the control board. Therefore, a ventilation opening is provided on the side wall of the motor bracket. To better guide the airflow from the ventilation opening to the air outlet, an exhaust duct is further provided connecting the ventilation opening and the air outlet. This avoids the airflow from the ventilation opening to the air outlet being affected by the airflow between the housing and the brushless motor, ensuring smooth unidirectional flow in the heat dissipation channel. It is understood that the exhaust duct is integrally formed with the motor bracket; or, the exhaust duct is separately provided and connected between the motor bracket and the housing.

[0021] 5. For portable food processing machines, the base is small in size and outer diameter for easy one-handed handling and carrying. In this application, the control board is located below the brushless motor. A further fixed bracket is provided, which divides the internal cavity of the housing into an upper motor cavity for accommodating the brushless motor and a lower control cavity for accommodating the control board. The upper and lower parts respectively form two cavities for heat dissipation of the brushless motor and the control board, and also facilitate the installation and fixation of the brushless motor and the control board. A transmission section connecting the upper and lower parts is directly formed between the fixed bracket and the housing, requiring no special structural design, resulting in a simple and efficient structure.

[0022] 6. The outer periphery of the fixed bracket is provided with baffles, which together form a mounting cavity. The control board can be stably and reliably installed in the mounting cavity and then fixed in the housing by the fixed bracket. This ensures the stability and reliability of the control board's installation structure and reduces the impact of the brushless motor on the control board. Furthermore, a transmission channel is formed between the baffles and the housing. Under the premise of ensuring the stability of the control board installation, the axial extension of the baffles forms a transmission channel with a certain mating length to gather the airflow in the control board cavity before transmitting it to the motor cavity, resulting in better transmission effect.

[0023] 7. The brushless motor is controlled directly by the IPM module and capacitor module on the control board. Preferably, heat dissipation fins are provided on the IPM module, and both the capacitor module and the heat dissipation fins are arranged downwards. In this way, the space formed between the fixed bracket and the bottom wall of the housing is used to dissipate heat from the heat dissipation fins and capacitor module. Furthermore, the air inlet faces the capacitor module and the heat dissipation fins, so that the incoming airflow can make more full contact with the capacitor module and heat dissipation fins and dissipate heat from them, further improving the heat dissipation efficiency.

[0024] 8. To further enhance the safety of the food processing machine, preferably, a cover is provided outside the socket. The cover can cover and seal the air inlet, air outlet, and socket when the user is not using the socket, thereby further preventing external water from flowing into the machine base from the air inlet, air outlet, and socket opening. During the use of the food processing machine, the socket is usually not exposed to water due to power supply requirements, thus ensuring that no water flows into the machine base from the air inlet and air outlet.

[0025] 9. In terms of internal space, the brushless motor is located above the control board. Therefore, the corresponding air inlet and outlet are located on the upper and lower sides of the socket, which can more reasonably match the rear heat dissipation section and front heat dissipation section of the brushless motor and control board, reducing the internal structure of the food processor. When the food processor is not plugged into the external connector, i.e., the normal power cord, the food processor does not work, so there is no need for heat dissipation. When the power cord is plugged into the socket, the power cord is used to isolate the air inlet and outlet, avoiding mutual interference of airflow between the air inlet and outlet. This can make full use of external structural components without adding unnecessary structures to the food processor.

[0026] 10. The cover is provided with a pre-tightening structure. When the food processor is in use, the cover connected to the housing at one end can be easily removed to expose the socket, air inlet and air outlet. When the food processor is not in use, the pre-tightening structure can promptly seal the socket, air inlet and air outlet, ensuring the food processor is safer.

[0027] 11. A limiting groove is provided on the side wall of the housing to install the socket, and the socket is further clamped by the corresponding air inlet and outlet pipes to better fix the socket in the base. This makes full use of the structure and space inside the base and avoids wasting space. As a result, the overall size of the food processing machine is smaller, making it easier for users to operate and carry. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the overall structure of the food processing machine described in this utility model.

[0029] Figure 2 This is a schematic diagram of the base structure of the food processing machine described in this utility model.

[0030] Figure 3 This is a cross-sectional view of the base structure of the food processing machine described in this utility model.

[0031] Figure 4 This is an exploded structural diagram of the base of the food processing machine described in this utility model.

[0032] Figure 5 This is a schematic diagram of the fixed support structure of the food processing machine described in this utility model.

[0033] Figure 6 This is a schematic diagram of the base structure of the food processing machine described in this utility model.

[0034] Figure 7 This is a schematic diagram of the control board structure of the food processing machine described in this utility model.

[0035] Figure 8 This is a schematic diagram of the base structure of the food processing machine described in this utility model.

[0036] The labels in the diagram correspond to the following names:

[0037] 1. Housing; 101. Upper Housing; 102. Lower Housing; 103. Limiting Slot; 11. Socket; 12. Motor Chamber; 13. Control Chamber; 2. Brushless Motor; 21. Stator; 22. Rotor; 23. Motor Shaft; 24. Motor Bracket; 241. Vent; 25. Fan; 26. Exhaust Duct; 3. Control Board; 31. Control Board Body; 32. Heat Dissipation Fins; 33. Capacitor; 4. Fixing Bracket; 41. Bracket Horizontal Plate; 42. 421. Mounting cavity; 43. Upper protrusion; 44. Bracket channel; 45. Air inlet pipe; 5. Cover; 51. Cover body; 52. Hand lever; 53. Movable magnet; 54. Fixed magnet; 61. Front heat dissipation section; 62. Transmission section; 63. Rear heat dissipation section; 64. Air inlet; 65. Air outlet; 901. Cup body; 902. Base; 903. Crusher blade; 904. Cutter disc; 905. Heating element; 920. Power cord. Detailed Implementation

[0038] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0040] Furthermore, it should be understood that in the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. As for positional relationships such as "upstream" and "downstream," they are based on the positional relationship when the fluid is flowing normally.

[0041] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0044] like Figures 1-8 As shown, this utility model discloses a lightweight and reliable food processor, which includes a cup body 901 and a base 902. The cup body 901 has a grinding chamber and a grinding device located within it. The base 902 includes a housing 1, a brushless motor 2, and a control board 3 housed within the housing 1. The control board 3 is connected to and drives the brushless motor 2. The motor shaft of the brushless motor 2 extends into the grinding chamber for transmission connection with the grinding device, driving the grinding device to cut and grind the food within the grinding chamber. Preferably, the control board 3 is positioned below the brushless motor 2. Here, the upper and lower positional relationship refers to the relative positional relationship when the user normally places the food processor. The control board 3 is directly positioned below the brushless motor 2. Preferably, the outer diameter of the control board 3 is adapted to the brushless motor 2 and the housing 1, i.e., the outer diameter of the brushless motor 2 and the control board 3 is set while ensuring that the housing 1 is convenient for the user to hold and carry.

[0045] To ensure the stable and reliable operation of the brushless motor 2 and the control board 3, the base 902 of the food processing machine is also provided with a heat dissipation duct connecting the control board 3 and the brushless motor 2. Preferably, the heat dissipation duct includes a front heat dissipation section 61 that at least partially covers the control board 3, a rear heat dissipation section 63 located within the brushless motor 2, and a transmission section 62 connecting the front heat dissipation section 61 and the rear heat dissipation section 63. The front heat dissipation section 61 can completely cover the control board 3. However, since the main heat-generating components of the control board 3 are relatively concentrated, the front heat dissipation section 61 can also cover only the corresponding heat-generating components. The brushless motor includes a stator and a rotor. The rear heat dissipation section 63, located within the brushless motor 2, can simultaneously dissipate heat from both the stator and the rotor. The space enclosed by the housing directly forms the transmission section 62 connecting the front heat dissipation section 61 and the rear heat dissipation section 63, eliminating the need for a separate connecting channel. This simplifies the structure and reduces the temperature of the housing 1, preventing the base from becoming too hot when held by the user. In this application, the airflow direction of the heat dissipation duct is not limited; that is, the airflow can flow from the front heat dissipation section 61 through the transmission section 62 to the rear heat dissipation section 63; the airflow can also flow from the rear heat dissipation section 63 through the transmission section 62 to the front heat dissipation section 61. However, compared to traditional series-wound motors, brushless motors generate less heat, while the greater heat is concentrated on the control board. Therefore, this embodiment describes the airflow direction as from the front heat dissipation section 61 through the transmission section 62 to the rear heat dissipation section 63. Of course, the airflow direction may be reversed due to factors such as changing the power specifications of the brushless motor or installing heating elements at the motor in the food processing machine. These are all within the scope of protection of this application and will not be elaborated here.

[0046] Portable food processors typically feature a detachable power cord, allowing them to supply power while also being removable for easy carrying. In this application, a socket 11 for external electrical connection is provided on the side wall of the casing. Furthermore, an air inlet 64 and an air outlet 65, communicating with the heat dissipation duct, are directly provided around the outer periphery of the socket 11. Preferably, the air inlet 64 communicates with the front heat dissipation section 61, and the air outlet 65 communicates with the rear heat dissipation section 63.

[0047] Thus, as Figure 2As shown in the diagram, referring to the airflow arrows, external cold air flows into the base from the air inlet 64, first passing through the control board 3, then through the transmission section 62 to the brushless motor 2, where it dissipates heat, and finally exits the base through the air outlet 65. This achieves heat dissipation for the control board and the brushless motor; the vertical arrangement of the brushless motor and control board reduces the outer diameter of the base, making the food processor easier to carry; the brushless motor makes the food processor more stable and reliable during operation, and reduces noise; furthermore, the air inlet and outlet are directly provided on the outer periphery of the socket, which reliably connects to the heat dissipation duct, ensuring heat dissipation for the internal components of the base, and also ensures the safety of the food processor by preventing water from entering through the socket. Therefore, this application provides a food processor that is lightweight, portable, stable, reliable, and low-noise during operation.

[0048] Specifically, such as Figures 1-8 As shown, the portable and reliable food processor of this utility model includes a cup body 901 in the upper section and a base 902 in the lower section. To facilitate carrying the food processor, the cup body 901 and the base 902 are integrally formed, together enclosing a grinding chamber within the cup body 901. A grinding device is provided at the bottom of the grinding chamber; preferably, the grinding device is a grinding blade 903. It should be noted that, as... Figure 1 As shown, the cup body 901 and the base 902 are threaded together, allowing for a detachable connection. During use, the user secures the cup body 901 to the base 902. After use, the cup body 901 can be detached from the base 902, facilitating cleaning and storage of the food processor. Furthermore, the food processor can also include a lower lid to seal the cup body 901, allowing the user to create a separate container by closing the lower opening. Alternatively, the cup body 901 and base 902 can be integrated, allowing the user to directly handle both components. Other connection structures between the body 901 and base 902 are not detailed here. Alternatively, the cup body 901 may form a complete structure, for example, the cup body may be made directly of stainless steel, the brushless motor may be directly installed at the bottom of the stainless steel cup body, and the motor shaft of the brushless motor may pass through the bottom of the cup body and extend into the cup body. The base may also include a housing that is fitted over both the cup body and the brushless motor, and the housing may form the side wall of the food processing machine from top to bottom.

[0049] like Figure 1 , Figure 3As shown, the base 902 includes a housing 1, a brushless motor 2, and a control board 3. The brushless motor 2 and the control board 3 are disposed within the housing 1. Preferably, the housing 1 also includes a fixing bracket 4, which is located below the brushless motor 2, and the control board 3 is further mounted on the bottom of the fixing bracket 4. The fixing bracket 4 divides the housing 1 into an upper motor cavity 12 and a lower control cavity 13, wherein the brushless motor 2 is located in the motor cavity 12, and the control board 3 is located in the control cavity 13. It can be understood that the control board 3 can also be directly disposed within the housing 1, for example, directly mounted on the bottom of the brushless motor 2, mounted on the housing 1, or mounted on the bottom wall of the housing 1. In this way, the control board can be used to divide the internal space of the housing; it can also allow the main functional components of the control board to face the brushless motor, so that the airflow flowing through the control board flows directly upward to the brushless motor.

[0050] like Figures 3-5 As shown, preferably, the fixed bracket 4 includes a horizontally extending bracket plate 41, which is horizontally disposed within the housing 1 to separate the housing 1. The bottom outer periphery of the bracket plate 41 is provided with downwardly extending baffles 42, wherein the baffles 42 can form a closed ring along the outer periphery of the bracket plate 41. Thus, the baffles 42 and the bracket plate 41 together form a mounting cavity 421, and the control board 3 is fixed within the mounting cavity 421. The control board 3 includes a control board body 31 and an IPM module (not shown) and a capacitor module disposed on the control board body 31. The IPM module has heat dissipation fins 32 on its outer side, and the capacitor module includes a capacitor 33. The fixed bracket 4 also has an air inlet pipe 45 communicating with the air inlet 64. Preferably, the air inlet pipe 45 is oriented towards the heat dissipation fins 32 and the capacitor 33, so that external airflow can directly blow onto the heat dissipation fins 32 and the capacitor 33 through the air inlet pipe 45. On the side wall of the fixed bracket 4, the bracket horizontal plate 41 and the baffle 42 are provided with notches pointing towards the center. When the fixed bracket 4 is installed in the housing 1, the notches and the inner wall of the housing 1 form a bracket channel 44 connecting the control cavity 13 and the motor cavity 12. In this way, the airflow passes through the heat dissipation fins 32 and the capacitor 33, and then flows through the bracket channel 44 to the brushless motor 2 disposed in the motor cavity 12. The fixed bracket 4 is also provided with an upper protrusion 43 on the side of the bracket horizontal plate 41 opposite to the brushless motor 2, and the upper protrusion 43 abuts against the brushless motor 2.

[0051] The control board 3 is mounted and fixed using the fixing bracket 4, which divides the interior of the housing into upper and lower parts while simultaneously connecting the two parts. This ensures stable and reliable installation of the control board 3 and better forms a front and rear heat dissipation section for cooling the control board and brushless motor, respectively, thus enhancing heat dissipation for both. The fixing bracket uses baffles to form a mounting cavity for the control board, further protecting it and providing waterproofing. The downward-facing control board increases the distance from the bottom, preventing water contact. Even when installed upside down, the baffles of the fixing bracket can block reverse water flow, providing three-dimensional protection for the control board. Alternatively, the control board can be directly installed inside the housing without the fixing bracket. For example, the control board can be horizontally positioned inside the housing below the brushless motor, directly dividing the internal cavity of the housing. Or, the control board can be directly installed at the bottom of the housing, for example... Figure 4 As shown, the housing includes an upper housing 101 and a lower housing 102. The control board can be directly mounted on the lower housing. The heat dissipation fins and capacitors of the control board are arranged facing upwards, so that external air enters the housing through the air inlet, first flows over the heat dissipation fins and capacitors, and then flows directly to the brushless motor located above. It is understood that the capacitor assembly may include multiple capacitors, or the capacitors of the capacitor assembly may be assembled inside the base and only electrically connected to the control board.

[0052] like Figures 1-8 As shown, in one embodiment of the detachable cup body 901 and base 902, preferably, the base 902 includes a blade disc 904 located at the top, with a heating element 905 at the bottom. The blade disc 904 is disposed on the top of the housing 1, and has a through hole at its center for the motor shaft 23 of the brushless motor 2 to pass through. The motor shaft 23 extends into the cup body 901 to be connected to the pulverizing blade 903. The detachable arrangement of the cup body 901 and the base 902 facilitates the individual installation of the cup body 901 and the base 902. For example, the cup body can be made of a more hygienic material such as glass or ceramic. Using glass allows for direct observation of the food processor's processing status, facilitates the structural design of the blade disc, and makes it easier to clean the cup body and base after disassembly. Furthermore, removing the cup body further reduces the height of the food processor, making it easier to carry.

[0053] The brushless motor 2 is mounted on the bottom of the cutter head 904. Preferably, the brushless motor 2 includes a stator 21, a rotor 22, and a motor bracket 24. The rotor 22 is integrally formed with the motor shaft 23. The rotor 22 is located inside the stator 21, and there is a gap between the rotor 22 and the stator 21. The motor bracket 24 is mounted on the bottom of the brushless motor 2 and surrounds the bottom opening of the stator 21 and the rotor 22. Preferably, the upper protrusion 43 surrounds the outside of the motor bracket 24 and abuts against the motor bracket 24. The rear heat dissipation section is formed inside the brushless motor 2. The transmission section of the heat dissipation air duct passes through the fixed bracket 4 and the control plate 3 from the control cavity 13 along the bracket channel 44, and further rises along the space between the housing 1 and the brushless motor 2 to the upper end of the brushless motor 2, and then communicates with the rear heat dissipation section 63. In this way, the flow direction of the transmission section around the outer periphery of the brushless motor and the rear heat dissipation section inside the brushless motor are opposite. This design provides better isolation between the brushless motor 2 and the housing 1, preventing the heat from the brushless motor 2 from being directly transferred to the housing 1, which would cause the housing 1 to heat up and affect the user's grip. Furthermore, since the heating element 905 is located at the top inside the base 902, the upward flow of the transmission section can also partially dissipate the heat from the heating element 905, preventing heat accumulation within the base 902. Moreover, the transmission section surrounding the brushless motor first dissipates heat from the stator, and then the subsequent heat dissipation section further dissipates heat from both the stator and rotor, forming a three-dimensional, surrounding heat dissipation system for the brushless motor, thus improving the heat dissipation effect.

[0054] Preferably, a fan 25 is provided at the bottom of the rotor 22 within the motor bracket 24. The fan 25 is mounted on the motor shaft 23 together with the rotor 22, so that the fan 25 rotates synchronously with the rotor 22. Preferably, a ventilation opening 241 is provided on the side of the motor bracket 24, and an air outlet duct 26 is provided outside the ventilation opening 241, the air outlet duct 26 connecting the ventilation opening 241 and the air outlet 65. Typically, the fan is equipped with centrifugal fan blades. When the brushless motor is working, the centrifugal fan blades blow the internal air away from the base 902 through the vent 241 and the outlet 65, creating a negative pressure zone inside the brushless motor 2 at the bottom of the rotor 22. This forces the airflow from the top of the brushless motor 2 through the rear heat dissipation section from top to bottom, simultaneously dissipating heat from the rotor and stator. As the negative pressure zone is transmitted upwards, it further drives the airflow in the transmission section to flow upwards, and then drives the air in the front heat dissipation section to replenish the transmission section. Finally, it drives the external cold air to flow into the base through the air inlet, ultimately dissipating heat from the components inside the base.

[0055] This design ensures efficient heat dissipation for all components within the motor cavity of the base, avoiding heat dissipation dead zones. Simultaneously, the transmission section located around the brushless motor forms a flowing air curtain around the motor, isolating it from transmitting noise to the housing, thereby reducing noise transmission and lowering the operating noise of the food processor. Alternatively, the transmission section can connect directly from the bottom of the brushless motor to its rear heat dissipation section, and then exit from the top of the motor. For example, to minimize the outer diameter of the base, the outer wall of the brushless motor can be tightly fitted to the inner wall of the housing, eliminating any gap between them. Furthermore, the motor's outer shell can be directly incorporated into the housing. These methods maximally compress the outer diameter of the base, resulting in a smaller food processor. In this case, the transmission section can no longer flow around the outer periphery of the brushless motor. Similarly, the motor bracket can better surround the bottom of the brushless motor, reducing the structural setup required when the bottom of the brushless motor directly forms a channel communicating with the air outlet. As mentioned earlier, when the airflow is directly from the bottom of the brushless motor to the brushless motor, the motor bracket may not be necessary. Alternatively, the fixed bracket can extend upwards and fit around the outer periphery of the brushless motor to form the function of the motor bracket, and the control board can be directly mounted on the bottom of the brushless motor through the fixed bracket. The ventilation port of the brushless motor can also be set in different positions depending on the structure. For example, it can be set directly at the bottom of the motor and communicate with the rear heat dissipation section axially. Of course, the fan can also be set on the top of the rotor. Furthermore, the food processing machine can also be equipped with a separate fan instead of being mounted on the brushless motor, thus achieving heat dissipation even when the motor is not working, meeting more needs.

[0056] As mentioned earlier, compared to traditional food processors that operate on a workbench, portable food processors require better sealing performance to prevent water from flowing into the base, especially into the control board and brushless motor, when the user carries or cleans them. Therefore, portable food processors have higher sealing requirements. One existing approach completely abandons internal and external ventilation openings for the safety of the food processor, sealing the entire base. However, this prevents the internal motor and control board from dissipating heat quickly, affecting the overall performance and lifespan of the food processor. Another approach involves a linkage structure at the air inlet and outlet. When the food processor is picked up, the linkage structure completely seals the air inlet and outlet. While this provides a certain degree of safety, the linkage structure is usually complex and occupies additional structural space in the base.

[0057] During product implementation and market research, the applicant discovered that for food processors that primarily rely on mains power, users typically do not move the food processor while it is plugged in. Even if users operate the food processor, they would generally avoid direct water flow to the power outlet based on conventional safety awareness. Therefore, in this application, an air inlet 64 and an air outlet 65 are directly provided on the outer periphery of the outlet 11. This ensures smooth communication between the heat dissipation duct inside the machine base and the outside, while preventing water from entering through the air inlet and outlet at the outlet.

[0058] Preferred, such as Figures 1-6 As shown, a limiting groove 103 is provided on one side of the bottom of the upper housing 101. The socket 11 is installed in the limiting groove 103. The air outlet 65 is provided above the socket 11, and the air inlet 64 is provided below the socket 11. Furthermore, the air outlet pipe 26 and the air inlet pipe 45 are clamped on the upper and lower sides of the socket 11. Then, the lower housing 102 is installed to fix the air outlet pipe 26, the socket 11, and the air inlet pipe 45 to one side of the bottom of the base 1. In this way, while the air inlet pipe 45 and the air outlet pipe 26 are simultaneously connected to the front heat dissipation section and the air inlet, and the rear heat dissipation section and the air outlet, the socket 11 can be more reliably fixed in the base 901, preventing the socket 11 from loosening when the user plugs in an external power source, and ensuring the stability, safety, and reliability of the food processing machine.

[0059] To better ensure the safety of the socket 11, air inlet 64, and air outlet 65, a cover 5 is provided on the outer side of the base. The cover 5 can fit against the outer wall of the housing 1 to cover the air outlet 65, socket 11, and air inlet 64. One end of the cover 5 is connected to the housing 1, and the other end is a free end. Furthermore, a pre-tightening structure is provided between the cover 5 and the housing 1. When the cover 5 is in a free state, the pre-tightening structure can fit tightly against the outer side of the housing 1 to cover the air outlet 65, socket 11, and air inlet 64.

[0060] As a preferred embodiment of the cover 5, the cover 5 includes a cover body 51. Preferably, the cover body 51 is made of a soft material, such as rubber or silicone. The upper end of the cover body 51 is fixedly connected to the housing 1, while the lower end is freely disposed. It should be noted that this is not a typical hinged connection structure. Preferably, the cover body 51 is directly clamped and fixed to the housing 1, so that the housing 1 has a pre-tightening force to push the cover 5 back to its original position. Due to the elasticity of the soft material itself, when the user uses the food processor, they can push the cover body upward to expose the air outlet 65, the socket 11, and the air inlet 64, and then plug the external power supply into the socket 11. When the user finishes using the machine and unplugs the power supply, the cover body 51 can return to its original position, covering the air outlet 65, the socket 11, and the air inlet 64, due to its own elasticity.

[0061] At the same time, such as Figure 2 As shown, the air inlet 54 and air outlet 65 are located on the upper and lower sides of the socket 11, respectively. In this way, when an external connector, such as the power cord 920 in this embodiment, is inserted into the socket 11 to provide power, the power cord 902 is positioned between the air inlet 54 and the air outlet 65, blocking the direct connection between the air inlet 54 and the air outlet 65. This better ensures that the airflow through the air inlet 54 is composed of external cold air, and prevents the hot air discharged from the air outlet 65 from being drawn back into the base 902.

[0062] Of course, to ensure that the cover 5 can better return to the covering position and fit tightly against the housing, the pre-tightening structure includes a movable magnet 53 and a fixed magnet 54 that are magnetically attracted to each other. The movable magnet 53 is located inside the bottom end of the cover 51, and the fixed magnet 54 is located inside the base 901 at a position corresponding to the movable magnet 53. The movable magnet 53 and the fixed magnet 54 can both be permanent magnets; or, one of the movable magnet 53 and the fixed magnet 54 can be a permanent magnet, and the other can be a magnetic component. A lever 52 is provided on the bottom outer side of the cover 51, which the user operates to open the cover 5.

[0063] Preferably, the air inlet 64 is located below the socket 11, and the air outlet 65 is located above the socket 11. Also, as... Figure 2As shown, the air inlet 64 and air outlet 65 are typically configured with multiple small holes arranged in a row, such as multiple round holes, square holes, or elongated holes. This ensures that when the user installs the power cord, the air inlet 64 below the power cord can maintain smooth airflow; although the air outlet 65 located above is partially covered by the shielding cover 5, the outward-blowing air outlet 65 can still quickly blow air to both sides without being significantly affected.

[0064] Furthermore, a cover is provided on the outside of the base to promptly cover the air inlet, air outlet, and socket when the food processor is not in use, making the food processor safer and more reliable to use. Simultaneously, the cover has a simple structure and can reliably adhere to the outer wall of the base using only its own elasticity or magnetic components, eliminating the need for complex mechanical structures and avoiding increasing the size of the food processor, thus ensuring its lightweight and compact design. It is understood that the air inlet and air outlet can also be located on opposite sides of the socket, depending on the structure of the base; or, the air inlet and air outlet can be simultaneously located on the same side of the socket, for example, simultaneously located above or below the socket. It is also understood that the cover can be pre-tightened by embedding elastic components inside the cover body.

[0065] In summary, this application first uses a brushless motor to replace the traditional series motor, and then positions the control board below the brushless motor to avoid increasing the outer diameter of the base. The space within the housing is then used to directly form a heat dissipation channel for the control board and brushless motor, specifically forming a front heat dissipation section for the control board, a rear heat dissipation section for the motor, and a transmission section connecting the two, ensuring reliable heat dissipation for both the control board and the brushless motor. Finally, an air inlet and an air outlet are provided on the outer periphery of the insertion point, and the safety structure of the socket ensures the safe installation of the air inlet and outlet. Ultimately, this ensures that the food processor, while being small and portable, provides efficient heat dissipation for internal components such as the brushless motor and control board, effectively reduces operating noise, and provides better waterproofing.

[0066] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are covered by the scope of the claims of the present utility model, and will not be listed here.

Claims

1. A lightweight and reliable food processing machine, comprising an upper cup body and a lower base, the cup body having a grinding chamber and a grinding device located within the grinding chamber, the base comprising a housing and a brushless motor and a control board disposed within the housing, the motor shaft of the brushless motor extending into the grinding chamber and being drively connected to the grinding device, characterized in that, The control board is located below the brushless motor and is electrically connected to the brushless motor. The base has a heat dissipation duct that connects the control board and the brushless motor in sequence. The heat dissipation duct includes a front heat dissipation section that at least partially covers the control board, a transmission section that passes through the control board axially, and a rear heat dissipation section located inside the brushless motor. The base also includes a socket located on the side wall of the housing for external electrical connection. The socket has an air inlet and an air outlet that communicate with the heat dissipation duct. Airflow flows in through the air inlet, passes through the front heat dissipation section, the transmission section, and the rear heat dissipation section, and then flows out through the air outlet.

2. The lightweight and reliable food processing machine as described in claim 1, characterized in that, The transmission section surrounds the outer periphery of the brushless motor and extends to the top of the brushless motor to communicate with the rear heat dissipation section, which extends along the axial direction of the brushless motor and is opposite to the flow direction of the transmission section.

3. The lightweight and reliable food processing machine as described in claim 2, characterized in that, The base also includes a motor bracket installed at the bottom of the brushless motor. The motor bracket is fitted around the bottom of the stator of the brushless motor to connect the rear heat dissipation section and the air outlet.

4. The lightweight and reliable food processing machine as described in claim 1, characterized in that, The base is also provided with a fixed bracket located between the brushless motor and the control board. The fixed bracket divides the base into two parts, which respectively accommodate the brushless motor and the control board. The fixed bracket and the housing form part of the transmission section.

5. The lightweight and reliable food processing machine as described in claim 4, characterized in that, The fixed bracket has a downwardly extending baffle on its outer periphery bottom surface. The baffle surrounds and forms a mounting cavity for mounting the control panel. The transmission section includes a channel formed between the baffle and the housing.

6. The lightweight and reliable food processing machine as described in claim 4, characterized in that, The control board is equipped with an IPM module and a capacitor module. The IPM module is equipped with heat dissipation fins. Both the capacitor module and the heat dissipation fins are arranged downwards, and the air inlet faces the capacitor module and the heat dissipation fins.

7. The lightweight and reliable food processing machine as described in claim 1, characterized in that, The food processing machine also includes a cover disposed on the outside of the machine base. The cover can close the air inlet, air outlet and socket, and the cover is abutted by an external connector to open the air inlet, air outlet and socket.

8. The lightweight and reliable food processing machine as described in claim 7, characterized in that, The air inlet and air outlet are located on the upper and lower sides of the socket, respectively, and the external connector separates the air inlet and air outlet when inserted into the socket.

9. The lightweight and reliable food processing machine as described in claim 7, characterized in that, One end of the cover is connected to the housing, and the other end is a free end. A pre-tightening structure is provided between the cover and the housing so that the cover can close the air inlet, air outlet and socket when it is in a free state.

10. The lightweight and reliable food processing machine as described in claim 7, characterized in that, The housing is provided with a limiting groove for installing the socket, and the base is also provided with an air inlet pipe located at the air inlet and an air outlet pipe located at the air outlet. The air inlet pipe and the air outlet pipe are located on both sides of the socket to clamp the socket.

Images