Food processor

Abstract

The food processing machine comprises a main machine assembly and a stirring cup assembly, the stirring cup assembly comprises a cup body and a smashing piece arranged in the cup body, a cup bottom shell is arranged at the bottom of the cup body, the main machine assembly comprises a main machine shell, and a frequency conversion brushless motor used for driving the smashing piece is arranged in the cup bottom shell; a power panel for driving the variable-frequency brushless motor is arranged in the main machine shell, the power panel is electrically connected with the variable-frequency brushless motor through a coupler, the power panel is provided with an IPM module and cooling fins for cooling the IPM module, a motor cooling air channel for cooling the variable-frequency brushless motor is formed in the cup bottom shell, a main machine cooling air channel for cooling the cooling fins is formed in the main machine shell, and the power panel is electrically connected with the variable-frequency brushless motor through a coupler. When the stirring cup assembly is installed on the main machine assembly, the motor cooling air channel is communicated with the main machine cooling air channel. The crushing part is directly driven by the variable-frequency brushless motor, so that the driving reliability is improved; and the variable-frequency brushless motor and the power panel are separately arranged and are respectively cooled, so that the reliable heat dissipation is ensured on the premise of improving the driving performance.

Description

Technical Field

[0001] This invention relates to the field of food processing, and more particularly to a food processing machine driven by a variable frequency brushless motor. Background Technology

[0002] Existing conventional blenders typically consist of a main unit and a blending jar. The blending jar is detachably mounted on the main unit. The main unit houses a motor, while the blending jar contains pulverizing blades and a heating element for heating food. A transmission connector for power transmission and a coupler for electrical transmission connect the main unit and the blending jar. The motor drives the pulverizing blades through the transmission connector, and the main unit supplies power to the heating element through the coupler. This design only needs to meet the heat dissipation requirements of the motor in the main unit; the blending jar only has a heating function and does not require heat dissipation. However, this design requires a transmission connector to transmit power. On the one hand, the transmission connector increases noise during operation; on the other hand, it also reduces power efficiency.

[0003] As an improvement over existing blenders, another technical solution places the motor directly inside the blending cup, with the motor shaft directly connected to the grinding blades. This eliminates the need for a transmission connector, effectively improving power transmission efficiency and avoiding the noise associated with transmission connectors. Since the motor is directly mounted in the blending cup, heat dissipation is required. Existing technology discloses using a motor-driven fan to draw airflow from the main unit, then into the blending cup to cool the motor, before the airflow exits the blending cup, returns to the main unit, and finally exits from the main unit. Another solution uses a separate cooling fan inside the main unit. This fan draws air into the main unit, blows it onto the motor in the blending cup, cools the motor, and then exits from the blending cup, returning to the main unit before finally exiting from the main unit. However, due to the size and repetitive nature of the blending cup itself, the motor driving the grinding blades cannot be made large or heavy, limiting the range of motors that can be selected, preventing the use of higher-power motors, and further restricting the grinding effect of the food processor.

[0004] The two existing technical solutions mentioned above can easily place the motor in different positions to meet different functional needs because they use conventional series motors. Firstly, series motors have a simple structure and lower requirements for heat dissipation ducts; existing technologies can simply set up an air duct structure between the main unit and the mixing cup to meet the heat dissipation needs of series motors. Secondly, series motors do not require complex drive schemes, so the air duct of the main unit only needs to ensure airflow to the mixing cup; the main unit itself does not require heat dissipation. Furthermore, series motors do not have complex drive requirements, so only a simple coupler is needed for electrical connection between the main unit and the mixing cup. The main unit only needs to supply power to the series motor, especially when a heating element is also installed inside the mixing cup, the motor and the heating element can share the live wire, neutral wire, and ground wire. However, series motors themselves have the following technical problems: series motors themselves have relatively large vibration and noise during operation, especially at higher speeds where vibration and noise increase rapidly, increasing the vibration and noise of the food processor and reducing the user experience. Due to its inherent characteristics, the adjustable speed range of a series-wound motor is relatively small, which cannot meet the multi-functional processing needs of food processing machines. Furthermore, the output torque of a series-wound motor will also change significantly when the speed changes, especially failing to meet the requirements of high-torque operation.

[0005] As a technological advancement, existing technologies have adopted variable frequency brushless motors to replace traditional series motors. Variable frequency brushless motors have low vibration and noise during operation, effectively reducing the operating noise of food processing machines. They also allow for wide-range speed adjustment via control, ensuring consistent output torque even with this wide speed range. This allows variable frequency brushless motors to meet the multi-functional needs of food processing machines. Therefore, as a technological advancement, variable frequency brushless motors are gradually replacing traditional series motors in the food processing machine field.

[0006] However, variable frequency brushless motors require a more complex drive power supply circuit. This circuit must drive the motor independently, unlike traditional series motors which share a power supply circuit with the heating element. The power board used to drive the variable frequency brushless motor generates a significant amount of heat during operation, thus requiring enhanced heat dissipation compared to traditional series motors. Existing technologies, such as CN114176429A, typically integrate the variable frequency brushless motor and power board within the main unit. The motor drives airflow, thus cooling both the power board and the motor. This shared location also facilitates electrical connection between the two, ensuring reliable motor drive from the power board. The drive of the variable frequency brushless motor primarily relies on the IPM module, which generates considerable heat during operation, necessitating more robust heat dissipation. The enclosed space created by the integrated design of the main unit allows for reliable airflow and synchronized electric drive. This ensures adequate heat dissipation for the IPM module on the power board while effectively reducing operating noise, providing a wide range of high torque output, and resulting in a low overall height for the food processor. Of course, existing technologies also include solutions using a separate fan to cool the power board; and solutions using separate fans to cool both the power board and the motor.

[0007] However, from the perspective of technological development trends, adopting the above solution has repeated the technical problem of the existing traditional blender where the motor-driven main unit and the mixing cup with pulverizing blades are separated, and the motor needs to drive the pulverizing blades set in the mixing cup through a connector. The design of the cooling duct for variable frequency brushless motors and the driving requirements of the power board prevent them from being simply placed in the mixing cup to directly drive the grinding blades, unlike traditional series-wound motors. The main reason is that the power board cannot be simply placed inside the mixing cup; it must be placed inside the main unit. This means that the two core components—the variable frequency brushless motor and the IPM module—are located separately in the mixing cup and the main unit, respectively. This raises several new technical challenges, including heat dissipation for the variable frequency brushless motor, heat dissipation for the IPM module inside the main unit, installation of the variable frequency brushless motor and power board, and electrical connections between the power board and the variable frequency brushless motor driver. Solving these problems to achieve a food processor that allows the variable frequency brushless motor to directly drive the grinding blades while located inside the mixing cup, reduces the weight of the mixing cup by placing the motor driver inside the main unit, and optimizes heat dissipation for both the motor and IPM module, ultimately providing consumers with a better experience, has become a challenge for those skilled in the art. This is the main reason why, despite the existence of existing technologies that allow the motor to be directly installed in the mixing cup for many years, there has been no publicly available technology that allows the variable frequency brushless motor to be installed in the mixing cup to directly drive the pulverizing components. Summary of the Invention

[0008] The main objective of this invention is to provide a food processing machine that utilizes a variable frequency brushless motor to directly drive the crushing components, while simultaneously solving the technical problems of separate heat dissipation and separate drive caused by the separate configuration of the variable frequency brushless motor and the IPM module, thereby providing a stable, reliable, and highly efficient food processing machine.

[0009] This invention discloses a food processing machine, including a main unit assembly and a mixing cup assembly. The mixing cup assembly includes a cup body and a pulverizing component disposed within the cup body. The bottom of the cup body is provided with a cup bottom shell. The main unit assembly includes a main unit housing. The cup bottom shell houses a variable frequency brushless motor for driving the pulverizing component. The main unit housing houses a power board for driving the variable frequency brushless motor. The power board is electrically connected to the variable frequency brushless motor via a coupler. The power board has an IPM module and heat sinks for dissipating heat from the IPM. A motor cooling duct for dissipating heat from the variable frequency brushless motor is formed inside the cup bottom shell. A main unit cooling duct for dissipating heat from the heat sinks is formed inside the main unit housing. When the mixing cup assembly is installed on the main unit assembly, the motor cooling duct is connected to the main unit cooling duct.

[0010] Preferably, an air inlet pipe and an air inlet slot are provided between the main unit housing and the cup bottom housing, and the air inlet pipe and air inlet slot are respectively connected to the main unit heat dissipation air duct and the motor heat dissipation air duct.

[0011] Preferably, the top of the main housing is provided with a recessed mounting cavity, the bottom wall of the mounting cavity protrudes upward to form the air inlet pipe, the bottom wall of the cup bottom shell is recessed inward to form the air inlet groove, and the side walls of the air inlet pipe and the air inlet groove are provided with interconnected through holes.

[0012] Preferably, the main unit housing is provided with an air inlet and an air outlet that communicate with the main unit heat dissipation duct. The main unit heat dissipation duct extends laterally so that the air inlet and air outlet are staggered. The air outlet is located at the top of the main unit housing so that the airflow bends within the main unit heat dissipation duct and then flows into the motor heat dissipation duct through the air outlet.

[0013] Preferably, the host component is further provided with an air duct cover and an air outlet cover. The air duct cover covers the heat sink, and the air outlet cover connects the air duct cover and the air outlet. The power board and the air duct cover are arranged horizontally, and the air outlet cover is arranged vertically.

[0014] Preferably, the host heat dissipation air duct is further provided with a water-blocking structure at the air outlet, and the water-blocking structure extends vertically downward to prevent fluid from flowing back from the air outlet to the power board.

[0015] Preferably, the main unit housing is further provided with an exhaust duct, and the motor cooling duct is connected to the main unit cooling duct and the exhaust duct respectively, so that the airflow flows through the main unit cooling duct, the motor cooling duct and the exhaust duct in sequence.

[0016] Preferably, the cup bottom shell forms a receiving cavity to accommodate the variable frequency brushless motor. The cup bottom shell is provided with an air inlet communicating with the receiving cavity. The variable frequency brushless motor includes a motor housing and a stator and a rotor located inside the motor housing. The motor housing is provided with a motor air inlet and a motor air outlet communicating with the receiving cavity. The cup bottom shell is also provided with an air guide shroud communicating with the motor air outlet and the exhaust duct.

[0017] Preferably, an exhaust pipe and an exhaust duct are provided between the main housing and the cup bottom housing, and the exhaust pipe and exhaust duct are respectively connected to the motor heat dissipation air duct and the exhaust air duct.

[0018] Preferably, the stirring cup assembly further includes a heating element disposed at the bottom of the cup body, and the power board is electrically connected to the heating element through the coupler, the coupler including independent motor drive plug-in terminals and heating drive plug-in terminals.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects.

[0020] 1. The food processing machine of this invention employs a variable frequency brushless motor directly connected to the grinding components to achieve direct drive. The power board driving the variable frequency brushless motor is located inside the main unit and is separate from the motor, thus separating the board from the machine. This arrangement satisfies the requirement of an integrated cup and machine (i.e., the mixing cup and motor are integrated) while avoiding the problems of insufficient structural space and inefficient heat dissipation when the control board is located inside the mixing cup. Using a variable frequency brushless motor to directly drive the grinding components results in low noise, stable and reliable operating speed during mixing cup operation, and the ability to adjust the speed over a wide range without a speed-changing device. It also ensures stable torque output from the variable frequency brushless motor, representing a technological upgrade and iteration for the food processing machine. Achieving these technical advantages requires the applicant, based on its accumulated independent technology, to modify the existing power board layout, the electrical connection structure between the main unit and the mixing cup assembly, and the airflow channel connection structure between the main unit and the mixing cup assembly, thereby realizing a completely new product structure to achieve the technical solution of this application. Specifically, this application places the power board within the main unit assembly. The power board is electrically connected to the variable frequency brushless motor located within the mixing cup assembly via a coupler assembly, thereby driving the variable frequency brushless motor. The main purpose of this arrangement is that the variable frequency brushless motor itself requires independent driving. When the variable frequency brushless motor is separated from the power board, a separate coupler, specifically with separate pins within the coupler, is needed to achieve electrical connection between the variable frequency brushless motor and the power board. Furthermore, this application optimizes the structural layout of the power board by placing an IPM module (i.e., intelligent power module, a highly integrated power electronic device that integrates power switching devices, drive circuits, and fault detection circuits such as overvoltage, overcurrent, and overheating) on ​​the power board. A heat sink is also provided to dissipate heat from the IPM module. A main unit cooling airflow channel is provided within the main unit to dissipate heat from the heat sink. This allows for a relatively concentrated main unit cooling airflow channel within the structural space, enabling centralized and efficient heat dissipation of the heat sink, unlike existing technologies where only airflow channels within the main unit are provided, which only meet the heat dissipation needs of the motor within the mixing cup. Furthermore, the stirring cup assembly includes a bottom shell, which forms a cooling duct for the variable frequency brushless motor, thus dissipating heat from the motor itself. When the stirring cup assembly is installed on the main unit assembly, the motor cooling duct and the main unit cooling duct are connected, allowing a single fan structure to simultaneously meet the cooling needs of both the heat sink and the variable frequency brushless motor. Preferably, the variable frequency brushless motor itself has a fan, which drives airflow within both the main unit cooling duct and the motor cooling duct to further dissipate heat from the heat sink and the variable frequency brushless motor.This configuration is also due to the fact that, compared to traditional series motors, variable frequency brushless motors generate less heat and have a lower demand for heat dissipation. However, the high-temperature areas of the power board contain modules such as IPM modules (Intelligent Power Modules, highly integrated power electronic devices that combine power switching devices, drive circuits, and fault detection circuits for overvoltage, overcurrent, and overheating), thyristor modules, and rectifier modules, which generate significant heat during operation, thus requiring higher heat dissipation capabilities. Therefore, in addition to heat sinks, the main unit's heat dissipation module is further positioned upstream of the motor's heat dissipation module. This allows external cool air to first pass through the heat sink of the main unit's heat dissipation module before flowing to the variable frequency brushless motor in the motor's heat dissipation module, simultaneously meeting the heat dissipation needs of both the power board and the variable frequency brushless motor.

[0021] 2. An interlocking air inlet pipe and air inlet slot are provided between the main unit casing and the bottom outer casing of the cup. The air inlet pipe and air inlet slot are used to connect the main unit heat dissipation air duct and the motor heat dissipation air duct, ensuring that the connection between the main unit heat dissipation air duct and the motor heat dissipation air duct is more reliable. In particular, it is beneficial to improve the heat dissipation efficiency of the heat sink in the main unit heat dissipation air duct, and ensure the safe and reliable operation of the variable frequency brushless motor itself and the power board.

[0022] 3. A recessed mounting cavity is provided at the top of the main unit housing to facilitate the installation of the mixing cup assembly and ensure its secure installation. Furthermore, an air inlet pipe is formed by an upward protrusion on the bottom wall of the mounting cavity, and an air inlet groove is formed by an inward recess on the bottom wall of the cup bottom shell. When the mixing cup assembly is installed in the mounting cavity of the main unit housing, the air inlet pipe is inserted into the air inlet groove, thus connecting the main unit's heat dissipation duct and the motor's heat dissipation duct. The air inlet pipe and air inlet groove also facilitate the installation and positioning of the mixing cup assembly by the main unit assembly. The inward recess on the bottom shell refers to the air inlet groove being formed by an upward concavity on the bottom wall of the cup bottom shell. This ensures that the air inlet groove does not interfere with the placement of the mixing cup assembly when it is normally placed on the worktable. Preferably, interconnected through holes are provided on the side walls of the air inlet pipe and the air inlet slot to connect the main unit heat dissipation air duct and the motor heat dissipation air duct. The through holes on the side walls cause the airflow to bend when it is transmitted between the air inlet pipe and the air inlet slot, so as to guide the airflow in the main unit assembly located on the lower side upward and into the stirring cup assembly located on the upper side, thereby realizing the arrangement of stacking the variable frequency brushless motor and the power board in space to reduce the overall height of the food processing machine.

[0023] 4. The main unit's cooling duct extends horizontally, allowing the power board and heat sink to be arranged horizontally. This solves the problem of excessive height when the power board is vertically mounted, thus reducing the overall height of the main unit. Furthermore, the air inlet and outlet of the main unit are staggered. Preferably, the outlet is located at the top of the main unit housing, so that when the mixing cup assembly is installed in the main unit, the main unit's cooling duct connects to the motor's cooling duct through the outlet. Of course, when using an air inlet pipe or inlet slot, the outlet can also be directly located on the corresponding air inlet pipe or slot. With the air inlet located at the top of the main unit housing and the main unit's cooling duct extending horizontally inside the housing, the airflow, after passing horizontally through the main unit's cooling duct, must bend before flowing upwards towards the motor's cooling duct. This reduces the space occupied by the main unit itself and allows the airflow passing through the main unit's cooling duct to converge before flowing into the motor's cooling duct through the outlet, resulting in higher cooling efficiency. It also helps reduce airflow noise after convergence.

[0024] 5. Further, an air duct cover is installed over the heat sink, forming a main unit cooling air duct for heat dissipation. An exhaust hood is then installed on the main unit assembly, forming an exhaust section of the main unit cooling air duct, either by itself or between the exhaust hood and the main unit housing. This exhaust hood and exhaust port guide the airflow passing over the heat sink to the exhaust port and then to the stirring cup assembly. This arrangement ensures smoother airflow and more efficient heat dissipation within the main unit assembly. The power board and air duct cover are positioned horizontally, while the exhaust hood is positioned vertically. This allows the airflow to efficiently pass horizontally through the heat sink, bend under the guidance of the exhaust hood, and then pass vertically through the exhaust port to reach the motor cooling air duct, achieving rapid and efficient heat dissipation for the power board.

[0025] 6. A water-blocking structure is further provided at the air outlet of the host heat dissipation duct. The water-blocking structure extends vertically downward along the host heat dissipation duct and can prevent fluid from flowing back from the air outlet to the power board. That is, when water or slurry flows into the host heat dissipation duct through the air outlet of the host casing, it flows vertically downward along the host heat dissipation duct. The water-blocking structure can block the path of the liquid to the power board, thereby preventing the liquid from flowing to the power board and playing a safety protection role.

[0026] 7. Further, an exhaust duct is provided inside the main unit housing, allowing the motor cooling duct within the mixing cup assembly to connect with the outside. This creates a complete airflow path for the food processor, consisting of the main unit cooling duct, the motor cooling duct, and the exhaust duct within the main unit assembly. External airflow first cools the power board via the main unit cooling duct, then flows into the mixing cup assembly to cool the variable frequency brushless motor, before returning to the exhaust duct of the main unit and being discharged from the main unit. Generally, the separate mixing cup assembly is positioned above the main unit assembly. The exhaust duct guides the airflow from the motor cooling duct outwards, preventing the airflow from the mixing cup assembly from directly discharging outwards and interfering with the normal operation of the main unit assembly.

[0027] 8. A mounting cavity is formed inside the cup bottom outer shell. The variable frequency brushless motor is directly mounted in the mounting cavity. Other components, such as couplers, can also be mounted in the mounting cavity. The mounting cavity not only allows for the installation of the variable frequency brushless motor and other components but also forms a channel for airflow. Airflow from the host's cooling duct gathers in the mounting cavity before flowing to the variable frequency brushless motor, also providing a buffering effect. Further, a motor housing is provided to enclose the stator and rotor inside the variable frequency brushless motor. The motor housing has a motor inlet and a motor outlet. The airflow gathered in the mounting cavity is guided from the motor inlet to the motor housing for efficient cooling of the stator and rotor before being discharged through the motor outlet. Then, an air guide shroud is further installed inside the cup bottom outer shell. This shroud forms an airflow channel connecting the motor outlet and the exhaust duct inside the host assembly, preventing the inlet and outlet airflows from mixing and improving the cooling effect on the variable frequency brushless motor.

[0028] 9. Further, an interlocking exhaust pipe and exhaust slot are set between the main body shell and the cup bottom shell. The exhaust pipe and exhaust slot are used to connect the motor heat dissipation air duct and the exhaust air duct, ensuring the reliability of the transmission connection between the two, improving the heat dissipation effect, and also preventing airflow and transmission noise from leaking out from the connection between the main body shell and the cup bottom shell, thus increasing the noise of the food processing machine.

[0029] 10. A heating element is further installed at the bottom of the cup to heat and process the food inside the mixing cup assembly. Combined with the pulverizing element, it can realize multi-functional processing such as cooking and pulverizing. Thus, the coupler is equipped with independent motor drive plug-in terminals and heating drive plug-in terminals to realize the separate driving of the variable frequency brushless motor and the heating element, thereby improving the working reliability of the variable frequency brushless motor and the heating element. Attached Figure Description

[0030] Figure 1 This is an exploded view of the first embodiment of the food processing machine described in this invention.

[0031] Figure 2 This is an exploded view of the main unit components of the first embodiment of the food processing machine of the present invention.

[0032] Figure 3 This is an exploded view of the power board assembly of the first embodiment of the food processing machine of the present invention.

[0033] Figure 4 This is a schematic diagram of the power board structure of the first embodiment of the food processing machine of the present invention.

[0034] Figure 5 This is an exploded view of the power board assembly in the second state of the first embodiment of the food processing machine of the present invention.

[0035] Figure 6 This is a schematic diagram of the main unit structure of the food processing machine according to the first embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of the second state structure of the main unit component in the first embodiment of the food processing machine of the present invention.

[0037] Figure 8 This is an exploded view of the mixing cup assembly structure in the first embodiment of the food processing machine of the present invention.

[0038] Figure 9 This is a cross-sectional view of the mixing cup assembly of the first embodiment of the food processing machine of the present invention.

[0039] Figure 10 for Figure 6 A magnified view of part A in the diagram.

[0040] Figure 11 This is an exploded view of the variable frequency brushless motor structure in the first embodiment of the food processing machine of the present invention.

[0041] Figure 12 This is a schematic diagram of the structure of the variable frequency brushless motor in the first embodiment of the food processing machine of the present invention.

[0042] Figure 13 This is a schematic diagram of the heating element structure in the first embodiment of the food processing machine of the present invention.

[0043] Figure 14 This is a schematic diagram of the electrical connection function of the stirring cup assembly in the first embodiment of the food processing machine of the present invention.

[0044] Figure 15 This is a schematic diagram of the electrical connection function of the main unit component in the first embodiment of the food processing machine of the present invention.

[0045] Figure 16 This is a schematic diagram of the electrical connection function of the control module in the first embodiment of the food processing machine of the present invention.

[0046] Figure 17 This is a schematic diagram of the air intake path structure of the first embodiment of the food processing machine of the present invention.

[0047] Figure 18 This is a schematic diagram of the exhaust duct structure of the first embodiment of the food processing machine of the present invention.

[0048] Figure 19 This is a schematic diagram of the exhaust path structure of the first embodiment of the food processing machine of the present invention.

[0049] Figure 20 This is an exploded view of the main component structure of the second embodiment of the food processing machine of the present invention.

[0050] Figure 21 This is a schematic diagram of the air intake path structure of the second embodiment of the food processing machine of the present invention.

[0051] Figure 22 This is a schematic diagram of the exhaust path structure of the second embodiment of the food processing machine of the present invention.

[0052] Figure 23 This is a schematic diagram of the mixing cup assembly structure in the third embodiment of the food processing machine of the present invention.

[0053] Figure 24 Figure 23 A magnified view of part B in the diagram.

[0054] The labels in the diagram correspond to the following names:

[0055] 001. Main Unit Assembly; 002. Blending Cup Assembly; 1. Main Unit Housing; 11. Upper Housing; 110. Mounting Cavity; 111. Mounting Hole; 113. Air Exhaust Cover; 114. Air Inlet; 115. Exhaust Cover; 12. Lower Housing; 121. Exhaust Port; 122. Drain Hole; 13. Control Panel; 141. Air Inlet Pipe; 142. Air Outlet; 143. Exhaust Pipe; 144. Exhaust and Air Inlet Hole; 2. Cup Body; 201. Mounting Protrusion; 202. Handle; 203. Upper Twist; 21. Grinding Component; 22. Blade Disc; 220. Motor Receiving Cavity; 221. Heating Element; 222. Sealing Ring; 223. Fixing Ring; 224. Motor Ring; 225. Thermostat; 226. NTC; 227. Fuse; 228. Safety Switch; 23. Cup Bottom Housing; 230. 231. Receiving cavity; 232. Air inlet; 233. Motor exhaust hood; 234. Motor exhaust outlet; 235. Exhaust duct; 240. Lower screw; 24. Cup base; 25. Sealing ring; 3. Cup lid; 4. Variable frequency brushless motor; 41. Motor shaft; 42. Rotor; 421. Fan; 43. Stator; 44. Motor lower housing; 45. Motor air inlet; 46. Motor air outlet; 5. Power board assembly; 51. Power board; 510. High temperature zone; 511. Heat sink; 512. Control unit; 52. Air duct cover; 521. Air duct cavity; 522. Water baffle; 523. Drain hole; 53. Water baffle; 6. Main unit heat dissipation air duct; 7. Motor heat dissipation air duct; 72. Motor exhaust air duct; 81. Upper coupler; 82. Lower coupler; 9. Exhaust air duct. Detailed Implementation

[0056] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0057] 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.

[0058] Furthermore, it should be understood that in the description of this application, terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used 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 the present invention. Positional relationships such as "upstream" and "downstream" are based on the positional relationships during normal fluid flow.

[0059] 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.

[0060] 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 invention according to the specific circumstances.

[0061] 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.

[0062] As a food processing machine described in this invention, such as Figure 1-22As shown, the food processor includes a main unit assembly and a mixing cup assembly. The mixing cup assembly is detachably mounted on the main unit assembly. The mixing cup assembly includes a cup body, a grinding component, a cup bottom shell, and a variable frequency brushless motor. The grinding component is disposed within the cup body, and the variable frequency brushless motor drives the grinding component. The cup bottom shell is fitted over the variable frequency brushless motor. The main unit assembly includes a main housing and a power board disposed within the main housing. The main unit assembly and the mixing cup assembly are electrically connected via a coupler. The power board is electrically connected to the variable frequency brushless motor via a coupler, enabling the power board to drive the variable frequency brushless motor. The power board is equipped with an IPM module and heat sinks for dissipating heat from the IPM module. The bottom shell of the cup has a motor cooling duct for dissipating heat from the variable frequency brushless motor, and the main unit shell has a main unit cooling duct for dissipating heat from the heat sink. Thus, when the mixing cup is installed on the main unit assembly, the main unit assembly duct and the motor cooling duct are connected, allowing airflow to pass through the main unit cooling duct to the motor cooling duct, thereby achieving heat dissipation for both the power board and the variable frequency brushless motor. By using a variable frequency brushless motor to directly drive the pulverizing components, the advantages of the variable frequency brushless motor—stable and reliable operation, wide speed adjustment range, low operating noise, and high and reliable output torque—can be fully utilized to achieve variable frequency direct drive pulverization in the food processor. Accordingly, the drive module and the variable frequency brushless motor are separately installed in the main unit. The variable frequency brushless motor is driven by a coupler. Based on this, the power board layout is optimized, a high-temperature zone is set up and a heat sink is installed in the high-temperature zone. A main unit heat dissipation air duct is formed in the main unit. Correspondingly, a motor heat dissipation air duct is set up in the mixing cup assembly. The motor heat dissipation air duct and the main unit heat dissipation air duct are connected, and finally, the heat dissipation of the variable frequency brushless motor and the power board is achieved simultaneously.

[0063] Example 1.

[0064] As a first embodiment of the food processing machine described in this invention, such as Figure 1-19As shown, the food processor includes a main unit assembly 001 and a mixing cup assembly 002. The mixing cup assembly 002 includes a cup body 2, a pulverizing component 21, and a blade disc 22. A cup lid 3 is provided at the upper opening of the cup body 2. The blade disc 22 closes the lower opening of the cup body 2. The pulverizing component 21 is rotatably mounted on the blade disc 22 and extends into the cup body 2. A variable frequency brushless motor 4 is provided at the bottom of the cup body 2, and a cup bottom shell 23 is provided outside the variable frequency brushless motor 4. The main unit assembly 001 includes a main unit housing 1. Inside the main unit housing 1 is a power board assembly 5 for driving the variable frequency brushless motor 4. The power board assembly 51 includes a power board 51 and an air duct cover 52. The power board 51 has a high-temperature zone 510, and the high-temperature zone 510 has heat sinks 511. The air duct cover 52 covers the heat sinks 511, and one side of the air duct cover 511 has an air duct cavity 521 for accommodating the heat sinks 511. The main housing 1 has a main unit cooling duct 6 for dissipating heat from the heat sink 511, and the bottom housing 23 has a motor cooling duct 7 for dissipating heat from the variable frequency brushless motor 4. A plug-in coupler is also provided between the main unit assembly 001 and the stirring cup assembly 002. The coupler includes an upper coupler 81 disposed on the stirring cup assembly 002 and a lower coupler 82 disposed on the main unit assembly 001. When the stirring cup assembly 002 is installed on the main unit assembly 001, the upper coupler 81 and the lower coupler 82 are plugged into each other to achieve electrical connection, thereby electrically connecting the power board 51 and the variable frequency brushless motor 4. Simultaneously, the main unit cooling duct 6 and the motor cooling duct 7 are interconnected, allowing airflow within the main unit assembly 001 to flow into the stirring cup assembly 002, thus simultaneously dissipating heat from both the power board 51 and the variable frequency brushless motor 4.

[0065] Preferably, the main housing 1 includes an upper housing 11 and a lower housing 12, which are fixedly connected to each other and form a main housing installation space inside. The power board 51 and the air duct cover 52 are horizontally arranged at the bottom of the main housing installation space. The front side of the upper housing 11 is provided with a mounting hole 111, which is located at the control panel 13. The user can operate the food processor by operating the control panel 13.

[0066] The power board 51 is equipped with a drive module to drive the variable frequency brushless motor 4. This typically includes an IPM module, a SCR module, and a rectifier module. These three components generate considerable heat during operation. By placing them close together on the power board 51 to form a high-temperature zone, and installing heat sinks on their outer sides, heat dissipation can be achieved simultaneously, ensuring stable and reliable operation of the power board 51. Furthermore, an air duct cover 52 is provided, with an air duct cavity 521 on one side. Heat sinks 511 can be placed inside the air duct cavity 521, thus forming part of the host's heat dissipation air duct 6. An air outlet cover 113 is also provided inside the host housing 1. The air outlet cover 113 and the air duct cover 52 provide fluid guidance, allowing the airflow within the air duct cavity 521 to exit the host housing 1 through the air outlet cover 113.

[0067] The main housing 1 is also equipped with an exhaust duct 9, and the motor cooling duct 7 is connected to the main housing cooling duct 6 and the exhaust duct 9 respectively. When the mixing cup assembly 002 is installed on the main housing assembly 001, the airflow flows into the main housing assembly from the main housing cooling duct 6, passes through the power board, and then flows into the motor cooling duct to cool the variable frequency brushless motor. The airflow then returns to the exhaust duct of the main housing assembly and is discharged from the main housing assembly. In this way, the food processor forms a complete airflow channel between the mixing cup assembly and the main housing assembly, which not only cools the variable frequency brushless motor in the mixing cup assembly and the power board in the main housing assembly, but also ensures that the gas enters and exits from the main housing assembly, better controlling the airflow direction and preventing arbitrary discharge when the airflow is uncontrolled. Preferably, the main unit housing 1 is provided with an exhaust hood 115, the exhaust hood 115 forms the exhaust duct 9 inside, the exhaust hood 115 is also provided with an exhaust inlet hole 144 at the top of the main unit housing 1, and the exhaust duct 9 is connected to the motor heat dissipation duct 7 through the exhaust inlet hole 144.

[0068] like Figure 8-13As shown, the cup body 2 is a tubular shape with openings at both ends. Preferably, the cup body 2 is made of glass, and the lid 3 covers the upper opening of the cup body 2. The outer wall of the cup body 2 is also provided with a mounting protrusion 201. The handle 202 is fixedly connected to the cup body 2 via the mounting protrusion 201, allowing the user to operate the mixing cup assembly via the handle 202. The blade 22 is located at the lower opening of the cup body 2 to close the lower opening. A variable frequency brushless motor 4 is mounted at the bottom of the blade 22. The mixing cup assembly 002 also includes a cup base 24. The blade 22 and the variable frequency brushless motor 4 are fixedly connected to the bottom of the cup body 2 via the cup base 24. An upper screw fastener 203 and a lower screw fastener 240 are interlocked between the cup body 2 and the cup base 24, fixing the cup base 24 to the bottom of the cup body 2 by screwing the upper screw fastener 203 and the lower screw fastener 240 together. The blade 22 is also clamped between the cup body 2 and the sealing ring 25. The outer side of the cup base 24 and the variable frequency brushless motor 4 is also provided on the cup bottom shell 23. The cup bottom shell 23 covers the bottom of the stirring cup assembly and the variable frequency brushless motor 4, and forms a receiving cavity 230 inside. The upper coupler 81 is also provided in the receiving cavity 230 and extends out of the cup bottom shell 23.

[0069] Preferably, a heating tube 221 is embedded inside the blade disc 22, and a sealing ring 222 extends downward from the side wall of the blade disc 22. A fixing ring 223 extends outward from the bottom of the sealing ring 222. The sealing ring 25 is sleeved on the outside of the sealing ring 222, and its bottom abuts against the fixing ring 223. When the cup base 24 is fixedly connected to the cup body 2, the cup base 24 clamps the fixing ring 223 and causes the sealing ring 222 and the blade disc 22 to extend into the interior of the cup body 2.

[0070] Preferably, the bottom wall of the cutter head 22 is further provided with a downwardly extending motor ring 224. The cutter head 22 constitutes the upper housing of the variable frequency brushless motor 4. The rotor 42, stator 43, and lower motor housing 44 of the variable frequency brushless motor 4 are directly fixedly mounted on the cutter head 22. The motor shaft 41 of the variable frequency brushless motor 4 passes through the cutter head 22 and connects to the pulverizing element 41 to directly drive the pulverizing element 41. The other end of the motor shaft 41 connected to the pulverizing element 41 is also provided in a fan 421. The fan 421 can drive airflow within the variable frequency brushless motor during operation, and further facilitate airflow within the motor cooling duct and the main unit cooling duct. Simultaneously, a motor receiving cavity 220 is formed between the rotor 42, stator 43, and motor ring 224. Preferably, a temperature controller 225, an NTC 226, and a fuse 227 are installed within the motor receiving cavity 220. Preferably, the heating element 221 is radially located outside the motor ring 224 to reduce the impact of the heating element 221 on the temperature controller 225, NTC 226, and fuse 227. The side wall of the variable frequency brushless motor 4 is provided with a motor air inlet 45 and a motor air outlet 46. Preferably, the motor air outlet 46 is located on the side wall of the lower motor housing 44.

[0071] like Figure 14-16As shown, the mixing cup assembly 002 and the main unit assembly 001 are electrically connected via an upper coupler 81 and a lower coupler 82. The variable frequency brushless motor 4 is mounted on the mixing cup assembly 002. The mixing cup assembly 002 also includes a heating element 221, a temperature controller 225, an NTC 226, and a fuse 227. Preferably, a safety switch 228 is also provided between the cup lid 3 and the cup body 2. When the cup lid 3 is opened, the safety switch 228 disconnects the power supply, providing a safety function. The power board 51 is equipped with a control unit 512, which typically includes an IPM module, a silicon controlled rectifier (SCR) module, and a rectifier module. The control unit 512 is used to control the variable frequency brushless motor 4. The power board 51 is also electrically connected to the control panel 13, allowing the user to operate the food processor via the control panel 13. Existing food processors with integrated cup and motor units (i.e., the motor is located inside the mixing cup) use traditional series-wound motors. The motor and heating element can share L, N, and ground wires (or live, neutral, and ground wires). Adding control signal lines and safety switch control lines allows for electrical connection between the upper and lower couplers. In this application, the control unit and the variable frequency brushless motor 4 are respectively located in the main unit assembly and the mixing cup assembly. The variable frequency brushless motor requires separate motor U, motor V, and motor W lines for drive. Correspondingly, the heating element requires heating L, heating N, and ground (GND). Furthermore, the coupler assembly also needs to process signal lines (NTC) and safety switch lines (SW) for normal operation of the food processor. Of course, it is understood that the processing signal lines can also transmit signals wirelessly. Therefore, the upper and lower couplers require independent motor drive and heating drive terminals, meaning at least seven terminals are needed for electrical connection between them.

[0072] like Figure 17-19As shown, the upper housing 11 has a recessed mounting cavity 110 at its top, and an air inlet pipe 141 is provided on the bottom wall of the upper housing 11 located in the mounting cavity 110. The bottom wall of the cup bottom housing 23 is recessed inward to form an air inlet groove 231. When the stirring cup assembly 002 is installed in the mounting cavity 110, the air inlet pipe 141 is inserted into the air inlet groove 231. Preferably, the side walls of the air inlet pipe 141 and the air inlet groove 231 are provided with interconnected through holes, including an air outlet 142 located on the side wall of the air inlet pipe 141 and an air inlet 232 located on the side wall of the air inlet groove 231. The main unit heat dissipation duct 6 of the main unit assembly and the motor heat dissipation duct 7 of the stirring cup assembly are connected through the air outlet 142 and the air inlet 232. By placing the air inlet and air intake on the side wall, the airflow flowing in from the host cooling duct is bent in the air intake slot before exiting through the air intake. On the one hand, the bend in the airflow avoids the decrease in heat dissipation efficiency caused by excessively fast flow when flowing straight through, and also avoids increased noise when flowing too fast. On the other hand, if the air outlet of the air intake pipe is set directly upward, liquid can easily flow from the air outlet into the air intake pipe and further flow back to the power board in the host cooling duct. Placing the air outlet on the inner wall can prevent the backflow of liquid.

[0073] Correspondingly, the main casing 1 is provided with an air inlet 114. Preferably, the air inlet 114 is located on the lower casing 12. Since the power board 51 and the air duct cover 52 are arranged laterally, the air inlet 114 and the air outlet 142 are laterally offset on the main casing 1. An air outlet cover 113 is provided at the downstream end of the main casing heat dissipation air duct 6. Preferably, the air outlet cover 113 is arranged longitudinally. Since the air outlet 142 is located at the top of the main casing 1, the airflow flows into the main casing 1 through the air inlet 114 and into the main casing heat dissipation air duct 6. After flowing past the heat sink 511, it turns upward in the heat dissipation air duct 6, and then flows out of the main casing from the air inlet pipe 141 and the air outlet 142 after passing through the air outlet cover 113. The air inlet and outlet of the main unit casing are staggered, and the power board extends horizontally. The airflow flows into the main unit's heat dissipation duct from the air inlet and then passes horizontally through the heat sink. The horizontal dimension of the main unit casing can be used to increase the heat dissipation area of ​​the heat sink and improve heat dissipation efficiency. After passing through the heat sink in the main unit's heat dissipation duct, the airflow bends upward and flows into the motor's heat dissipation duct through the air outlet. The bend avoids excessive speed and noise when the airflow flows through, and at the same time, the upward bend guides the airflow from horizontal to vertical. This allows the variable frequency brushless motor to be separated from the power board, thus realizing the technical solution of placing the variable frequency brushless motor in the mixing cup.

[0074] The cup bottom outer shell 23 has a receiving cavity 230 inside, and the variable frequency brushless motor 4 is located in the receiving cavity 230. The receiving cavity 230 is connected to the external space or the host heat dissipation duct through the air inlet 232. The side wall of the variable frequency brushless motor 4 is provided with a motor air inlet 45 and a motor air outlet 46. The motor air inlet 45 is connected to the receiving cavity 230, so that the airflow flowing in from the host heat dissipation duct first enters the receiving cavity 230, and then flows into the variable frequency brushless motor 4 through the motor air inlet 45 to dissipate heat from the stator and rotor of the variable frequency brushless motor 4. The cup bottom shell 23 is also provided with a motor exhaust hood 233 that communicates with the motor air outlet 46. The motor exhaust hood 233 extends downward in the longitudinal direction. The cup bottom shell 23 is also provided with an exhaust groove 235 at the bottom that communicates with the motor exhaust hood 233. The motor exhaust hood 233 and the exhaust groove 235 are connected by a motor exhaust outlet 234. Preferably, the motor exhaust outlet 234 is provided with multiple small holes. The main housing is equipped with an exhaust hood 115, which forms an exhaust duct 9. The exhaust hood 115 extends downwards longitudinally. The top of the main housing 1 is equipped with an exhaust pipe 143, which protrudes from the top of the main housing 1, extends upwards, and can extend into the exhaust slot 235. The top of the exhaust pipe 143 is also equipped with an exhaust inlet hole 144. The airflow in the motor exhaust hood 233 flows back to the exhaust duct 9 of the main unit through the motor exhaust outlet 234 and the exhaust inlet hole 144. The bottom of the side wall of the lower housing 12 is also equipped with an exhaust port 121, through which the exhaust duct 9 communicates with the outside. The air inlet and outlet of the variable frequency brushless motor are both located on the side wall, allowing airflow to enter and exit the motor. The heat dissipation structure of the variable frequency brushless motor does not occupy its axial space, thus reducing its axial height and consequently decreasing the axial height of the mixing cup assembly. Furthermore, the motor exhaust hood and exhaust duct are arranged longitudinally downwards, guiding the airflow through the motor downwards and out of the mixing cup assembly. This ensures sufficient heat dissipation for the variable frequency brushless motor within the mixing cup assembly, enhancing its reliability. An exhaust duct is then provided within the main housing to discharge the airflow from the mixing cup assembly to the main housing. Preferably, the exhaust port is located at the bottom of the main housing, allowing airflow to exit from the bottom of the main housing, preventing airflow from diffusing outwards when exiting directly from the side wall of the mixing cup assembly and affecting the user. The mixing cup assembly and the main unit assembly are further connected by an exhaust pipe and an exhaust duct, which can improve the reliability of the connection between the motor cooling duct and the exhaust duct, thereby ensuring that the hot airflow discharged from the motor cooling duct can be fully discharged from the main unit through the exhaust duct, thus improving the reliability of heat dissipation.

[0075] By configuring the aforementioned host cooling air duct, motor cooling air duct, and exhaust air duct, the food processing machine forms a complete airflow channel. Specifically, as shown... Figure 17 As shown, when the food processor is working, the fan 421 rotates and drives airflow, thereby driving the airflow from the air inlet into the main housing, passing laterally through the high-temperature area of ​​the power board to dissipate heat from the power board's control unit. The airflow further bends upwards into the air outlet shroud, and then flows through the air outlet and air inlet into the receiving cavity of the cup assembly. The airflow then enters the variable frequency brushless motor through the motor air inlet to dissipate heat from the stator and rotor, and is finally discharged through the motor air outlet. This achieves heat dissipation for the power board and the variable frequency brushless motor. Further, as... Figure 18 , 19 As shown, the airflow discharged by the variable frequency brushless motor is bent and then guided downward through the motor exhaust hood and discharged from the stirring cup assembly. It then flows back into the main unit housing through the exhaust air inlet, flows through the exhaust air duct, and is discharged from the main unit housing through the exhaust port, thus achieving complete heat dissipation for the food processing machine.

[0076] By adopting the above scheme, the variable frequency brushless motor and power board, which would otherwise need to be housed in the same space in the prior art, are separately installed in the mixing cup assembly and the main unit assembly. This allows the variable frequency brushless motor in the mixing cup assembly to directly drive the pulverized parts. The power board in the main unit assembly is arranged in a high-temperature zone, and heat sinks are used to efficiently dissipate heat from this zone. This ensures that even when the variable frequency brushless motor and power board are separated, they can still be cooled simultaneously through interconnected cooling air ducts.

[0077] Understandably, the air inlet pipe and air inlet slot may not be provided between the stirring cup assembly and the main unit assembly. Instead, a through hole is provided between the stirring cup assembly and the main unit assembly, and a sealing element is provided at the through hole to ensure reliable airflow between the main unit assembly and the stirring cup assembly. Similarly, the exhaust pipe and exhaust slot may not be provided between the stirring cup assembly and the main unit assembly.

[0078] It is understandable that the top of the main housing may not have a mounting cavity for installing the mixing cup assembly. Instead, the mixing cup assembly and the main housing assembly can be fixedly installed by extending the lateral dimension of the main housing and setting a fixing structure on the top of the main housing, or by using a coupler.

[0079] Understandably, the air inlet can be positioned differently depending on the shape of the main unit housing. Similarly, depending on the installation position of the stirring cup assembly and the main unit assembly, the air outlet can be located on the side wall of the main unit housing to communicate with the motor cooling duct.

[0080] Understandably, the power board can also be vertically mounted within the host assembly, with the air inlet located at the bottom of the host assembly and the air outlet at the top of the host housing. The airflow passes from bottom to top through the heat sink of the power board to dissipate heat from the high-temperature area. Therefore, the host cooling duct does not have a bending structure. Furthermore, the heat sink is configured as multiple sequentially arranged fins, extending along the airflow direction of the host cooling duct, or the fins extending perpendicular to the airflow direction of the host cooling duct.

[0081] Understandably, when the main housing extends laterally to compress the axial height, the stirring cup assembly is directly mounted on the main housing assembly, thereby allowing the airflow of the motor cooling duct to be directly discharged through the stirring cup assembly without the need for an exhaust duct. Alternatively, the main housing assembly may also have an exhaust duct connected to the motor cooling duct located outside the main housing assembly.

[0082] Understandably, a channel communicating with the motor air inlet can also be provided inside the bottom shell of the cup, so that the airflow discharged by the variable frequency brushless motor flows directly to the receiving cavity; or the stirring cup assembly is discharged directly from the motor air outlet.

[0083] Understandably, based on the processing requirements of the food processor, the mixing cup assembly may only have a pulverizing component and not a heating component. The food processor only needs to perform the pulverizing function. The variable frequency brushless motor is installed in the mixing cup assembly and drives the pulverizing blade. The variable frequency brushless motor is electrically connected to the main unit assembly through a coupler. In this case, the coupler only needs to satisfy the electrical connection between the variable frequency brushless motor and the power board.

[0084] Example 2.

[0085] As a second embodiment of the food processing machine described in this invention, such as Figure 20-22 As shown, compared to Embodiment 1, in this embodiment, a water-blocking structure is further provided within the host heat dissipation duct. It should be noted that the specific Embodiment 1 and Embodiment 2 described are not intended to be completely independent of each other, but merely to illustrate two preferred technical solutions. Furthermore, the technical features and solutions of the two embodiments are common and can be referenced from each other.

[0086] like Figure 22-24As shown, a water-blocking structure is provided inside the host heat dissipation duct, which includes a water-blocking plate 53 disposed within the host heat dissipation duct 6. Specifically, the duct cover 52 is provided with a duct cavity 521 for accommodating the heat sink of the power board 51. A water-blocking rib 522 is provided on the downstream side of the duct cavity 521. The water-blocking rib extends vertically upward from one side wall of the duct cover 52. An air outlet cover 113 is disposed between the duct cavity 521 and the air outlet 142, so that the airflow flows laterally along the duct cavity 521, bends upward, flows through the air outlet cover 113, and flows out of the host casing 1 through the air outlet 142. The drainage plate 53 is disposed at the connection between the air duct cavity 521 and the air outlet hood 113. The water baffle 53 extends vertically downward, and the water baffle 53 and the water baffle rib 522 have an overlapping portion in the horizontal direction, that is, the upper end of the water baffle rib 522 is vertically positioned at the lower end of the water baffle 53. Preferably, the height difference between the upper end of the water baffle rib 522 and the lower end of the water baffle 53 is not less than 1 mm.

[0087] like Figure 21 As shown, with this configuration, after the airflow passes over the heat sink, it is blocked by the water-blocking ribs 522 and the water-blocking plate 53. The airflow first bends downwards, then upwards, and then exits the main unit housing through the air outlet shroud. If liquid such as water or overflowing slurry flows into the main unit housing from the air outlet at the top, the liquid is blocked by the water-blocking plate and cannot flow back to the power board. Furthermore, since the water-blocking ribs are located at their bottom ends, they can better block the flow. Thus, liquid is prevented from flowing to the power board, providing better safety.

[0088] Preferably, the bottom of the water-blocking rib 522 is provided with a drain hole 523 communicating with the outside. After the liquid flowing into the host heat dissipation duct is blocked by the water-blocking rib, it gathers at the bottom of the water-blocking rib and is discharged from the host casing through the drain hole, thus preventing it from accumulating in the host heat dissipation duct.

[0089] Preferably, the bottom of the exhaust duct of the exhaust hood 115 is also provided with a drain hole 122. The drain hole 122 is located on the lower housing 12. When liquid flows into the exhaust duct from the exhaust inlet, it can be blown out by the exhaust port 121 or leaked out by the drain hole 122. Furthermore, the bottom height of the exhaust inlet 144 can be set lower than the bottom height of the outlet 142. In this way, if there is liquid residue in the mounting cavity 110 of the main housing 1, the liquid will first flow from the exhaust inlet 144 to the exhaust duct and then be discharged from the main housing through the drain hole. Since no electrical components or other parts are installed in the exhaust duct, there is no safety risk. Therefore, it can actively drain liquid, thereby improving the safety of the food processing machine.

[0090] Example 3.

[0091] As a third embodiment of the food processing machine described in this invention, such as Figure 23 , 24 As shown, compared to Embodiment 1 and Embodiment 2, in this embodiment, the temperature controller, etc., is disposed on the outer wall of the cutter disc. It should be noted that the specific Embodiment 1, Embodiment 2, and Embodiment 3 described are not intended to be completely independent of each other, but merely to specifically illustrate two preferred technical solutions. Furthermore, the technical features and solutions of the two embodiments are common and can be referenced from each other.

[0092] like Figure 23 , 24 As shown, the sealing ring 222 on the outer side of the blade disc 22 extends upward along the side wall of the blade disc 22. The sealing ring 222 extends outward at the top to form a fixing ring 223. A sealing ring 25 is fitted over the fixing ring 223. The cup base 24 presses the fixing ring 223 and the sealing ring 25 together and seals them to the bottom wall of the cup body 2. The sealing ring 222 forms a cavity inside, which together with the interior of the cup body 2 forms a processing cavity for accommodating food. The heating tube 221 is integrally formed with the blade disc 22. The heating tube is located at the bottom of the blade disc 22 and close to the outer periphery. This arrangement increases the circumference of the heating tube 221, thereby increasing its power. In addition, its proximity to the outer periphery of the blade disc 22 also avoids overly concentrated heating, making the heating of the food by the blade disc 22 more uniform.

[0093] The mixing cup assembly 002 is also provided with a temperature controller 225, an NTC and a fuse for detecting the processing status of the food processor. Compared with the embodiment 1, where the temperature controller 225 and the like are located in the accommodating space at the bottom of the cutter disc 22, in this embodiment, the variable frequency brushless motor 4 is directly located at the bottom of the cutter disc 22 and the two are arranged adjacent to each other. Correspondingly, the temperature controller 225, the NTC and the fuse are located on the side wall of the cutter disc 22, that is, they are arranged around the side wall of the sealing ring 222.

[0094] This design ensures efficient operation of the temperature controller, NTC, and fuse. Furthermore, it reduces the size between the variable frequency brushless motor and the blade disc, thereby compressing the height of the mixing cup and minimizing the overall height of the food processor. This results in a more compact and user-friendly food processor. Additionally, the temperature controller is positioned on the side wall of the sealing ring and is fitted inside the bottom shell during installation, away from the variable frequency brushless motor. This avoids the airflow from the motor affecting the temperature controller, improving its detection accuracy and ensuring better operation of the food processor.

[0095] Understandably, based on the structure of the food processing machine, especially the structure of the mixing cup assembly, the temperature controller, NTC, and fuse can be respectively located between the variable frequency brushless motor and the blade disc or on the outside.

[0096] Understandably, the cutter disc may extend only laterally and be integrally equipped with a heating tube. The outer periphery of the cutter disc is directly fitted onto the sealing ring, and the outer periphery of the cutter disc is sealed and fixed to the cup body. The temperature controller, NTC, and fuse are disposed between the variable frequency brushless motor and the cutter disc; or, the temperature controller, NTC, and fuse are located on the periphery of the variable frequency brushless motor.

[0097] It is understood that the heating tube is separately disposed from the cutter head and the heating tube is fixed to the cutter head by welding or other means, and the temperature controller, NTC and fuse are installed on the bottom outer periphery or bottom wall of the cutter head.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are covered by the scope of the claims of the present invention, and will not be listed here.

Claims

1. A food processing machine, comprising a main unit assembly and a mixing cup assembly, the mixing cup assembly comprising a cup body and a pulverizing component disposed within the cup body, the bottom of the cup body being provided with a cup bottom outer shell, the main unit assembly comprising a main unit shell, characterized in that, The bottom shell of the cup is equipped with a variable frequency brushless motor for driving the pulverizing component. The main housing is equipped with a power board for driving the variable frequency brushless motor. The power board is electrically connected to the variable frequency brushless motor through a coupler. The power board is equipped with an IPM module and a heat sink for cooling the IPM. A motor cooling duct is formed inside the bottom shell of the cup for cooling the variable frequency brushless motor. A main housing cooling duct is formed inside the main housing for cooling the heat sink. When the stirring cup assembly is installed on the main housing assembly, the motor cooling duct is connected to the main housing cooling duct.

2. The food processing machine as described in claim 1, characterized in that, An air inlet pipe and an air inlet slot are provided between the main body shell and the bottom shell of the cup, and the air inlet pipe and the air inlet slot are respectively connected to the heat dissipation air duct of the main body and the heat dissipation air duct of the motor.

3. The food processing machine as described in claim 2, characterized in that, The top of the main housing has a recessed mounting cavity, the bottom wall of the mounting cavity protrudes upward to form the air inlet pipe, the bottom wall of the cup bottom shell is recessed inward to form the air inlet groove, and the side walls of the air inlet pipe and the air inlet groove have interconnected through holes.

4. The food processing machine as described in claim 1, characterized in that, The main unit housing is provided with an air inlet and an air outlet that are connected to the main unit heat dissipation duct. The main unit heat dissipation duct extends laterally so that the air inlet and air outlet are staggered. The air outlet is located at the top of the main unit housing so that the airflow bends in the main unit heat dissipation duct and then flows into the motor heat dissipation duct through the air outlet.

5. The food processing machine as described in claim 4, characterized in that, The host component is also provided with an air duct cover and an air outlet cover. The air duct cover covers the heat sink, and the air outlet cover connects the air duct cover and the air outlet. The power board and the air duct cover are arranged horizontally, and the air outlet cover is arranged vertically.

6. The food processing machine as described in claim 4, characterized in that, The host cooling air duct is also provided with a water-blocking structure at the air outlet. The water-blocking structure extends vertically downward to prevent fluid from flowing back from the air outlet to the power board.

7. The food processing machine as described in claim 1, characterized in that, The main unit housing is also provided with an exhaust duct. The motor cooling duct is connected to the main unit cooling duct and the exhaust duct, respectively, so that airflow passes through the main unit cooling duct, the motor cooling duct and the exhaust duct in sequence.

8. The food processing machine as described in claim 7, characterized in that, The bottom shell of the cup forms a cavity for accommodating the variable frequency brushless motor. The bottom shell of the cup is provided with an air inlet communicating with the cavity. The variable frequency brushless motor includes a motor housing and a stator and a rotor located inside the motor housing. The motor housing is provided with a motor air inlet and a motor air outlet communicating with the cavity. The bottom shell of the cup is also provided with an air guide shroud communicating with the motor air outlet and the exhaust duct.

9. The food processing machine as described in claim 7, characterized in that, The main housing and the bottom outer shell of the cup are provided with an exhaust pipe and an exhaust groove that are plugged into each other and communicate with each other. The exhaust pipe and the exhaust groove are respectively connected to the motor heat dissipation air duct and the exhaust air duct.

10. The food processing machine as described in claim 1, characterized in that, The stirring cup assembly also includes a heating element located at the bottom of the cup body. The power board is electrically connected to the heating element through the coupler, which includes independent motor drive terminals and heating drive terminals.

Images