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, a cutter head, a smashing piece and a cup bottom shell, the main machine assembly comprises a main machine shell, a frequency conversion brushless motor is arranged in the cup bottom shell, a power panel is arranged in the main machine shell, and the power panel is electrically connected with the frequency conversion brushless motor through a coupler; a motor heat dissipation air channel is formed in the cup bottom shell, a main machine heat dissipation air channel is formed in the main machine shell, the motor heat dissipation air channel is communicated with the main machine heat dissipation air channel when the stirring cup assembly is installed on the main machine assembly, the cutter head is provided with a heating piece, and a motor containing cavity is formed between the variable frequency brushless motor and the cutter head. And a temperature controller and a fuse link are also arranged on the bottom wall of the cutterhead in the motor accommodating cavity. 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] The utility model relates to the field of food processing, in particular to a food processing machine driven by a variable frequency brushless motor. Background Art

[0002] The existing conventional wall-breaking machine usually includes a main unit and a mixing cup. The mixing cup is detachably mounted on the main unit. The main unit is provided with a motor, and the mixing cup is provided with a crushing knife and a heating element for heating ingredients. A transmission connector for power transmission and a coupler for power transmission are provided between the main unit and the mixing cup. The motor drives the crushing knife through the transmission connector, and the main unit supplies power to the heating element through the coupler. This solution only needs to meet the heat dissipation requirements of the motor of the main unit. The mixing cup only has a heating function and does not need heat dissipation. However, this solution needs to transmit power through a transmission connector. On the one hand, the transmission connector will increase the noise during operation, and on the other hand, the transmission connector will also reduce the power efficiency.

[0003] As a change of the existing wall-breaking machine, another existing technical solution is to directly set the motor in the mixing cup, and the motor shaft is directly connected to the crushing knife, so that there is no need to realize the power transmission of power through the transmission connector, which can effectively improve the efficiency of power transmission and avoid the working noise caused by the transmission connector. Since the motor is directly set on the mixing cup, it is necessary to dissipate the heat of the motor in the mixing cup. The prior art discloses using the motor to drive the fan, sucking the airflow from the main machine, and then flowing to the mixing cup to dissipate the heat of the motor, and then flowing out of the mixing cup and backflowing into the main machine and finally flowing out from the main machine, so as to realize the function of dissipating the heat of the motor in the mixing cup. There is also a solution to set a separate cooling fan in the main machine, and the cooling fan sucks the airflow into the main machine, and then blows it to the motor in the mixing cup. After the heat is dissipated, it is discharged from the mixing cup and flows back into the main machine, and finally flows out from the main machine. However, due to the volume of the mixing cup itself and the repeated restrictions of the mixing cup itself in this technical solution, the motor used to drive the crushing knife cannot be set with a larger volume and weight, thereby limiting the selection range of the motor, and it is impossible to select a motor with higher power, which further limits the crushing processing effect of the food processor.

[0004] As mentioned above, the two prior art solutions can simply set the motor in different positions to meet different functional needs because a conventional series-excited motor is used. First, the series-excited motor has a simple structure and has low requirements for the heat dissipation duct. For example, the prior art simply sets a duct structure between the main unit and the mixing cup to meet the heat dissipation requirements of the series-excited motor; secondly, the series-excited motor does not require a complex driving solution, so the air duct of the main unit only needs to meet the airflow to the mixing cup, and the main unit itself has no heat dissipation requirements; in addition, the series-excited motor does not have a complex driving requirement, so it only needs to be electrically connected between the main unit and the mixing cup through a simple coupler, and the main unit only needs to supply power to the series-excited motor, especially when a heating element is also provided in the mixing cup, the live wire, neutral wire and ground wire can be shared between the motor and the heating element. However, the series-excited motor itself will have the following technical problems: the series-excited motor itself has a large vibration and noise when working, especially when the speed is high, the vibration and noise will increase rapidly, which increases the vibration and noise of the food processor when working, and reduces the user experience of the food processor. The series-excited motor is affected by its own characteristics, and the adjustable speed range during operation is small, which cannot meet the multi-functional processing requirements of the food processor. In addition, the output torque of the series-excited motor will also change greatly when the speed changes, especially it cannot meet the needs of high-torque work.

[0005] As an iterative improvement of technology, variable frequency brushless motors are used in the existing technology to replace traditional series-excited motors. Variable frequency brushless motors have low vibration and noise when working, and can effectively reduce the working noise of food processors; variable frequency brushless motors can be controlled and adjusted to adjust the output speed over a wide range, and when the speed is adjusted over a wide range, the output torque of the motor can also be guaranteed. In this way, variable frequency brushless motors can meet the multi-functional requirements of food processors. Therefore, variable frequency brushless motors are provided as an iterative technology to gradually replace traditional series-excited motors in the field of food processors.

[0006] However, the variable frequency brushless motor requires a more complex driving power supply circuit. The power supply circuit needs to drive the variable frequency brushless motor alone, and it cannot share the power supply circuit with the heating element like the traditional series-excited motor; the power supply board used to drive the variable frequency brushless motor will generate a lot of heat during operation, so compared with the traditional series-excited motor, it is necessary to strengthen the heat dissipation of the power supply board. The prior art usually sets the variable frequency brushless motor and the power supply board together in the host, and uses the variable frequency brushless motor to drive the air flow, that is, to dissipate heat for the power supply board and the motor; at the same time, the power supply board and the variable frequency brushless motor are arranged together in the host to facilitate the electrical connection between the two, and the power supply board can reliably drive the variable frequency brushless motor. The drive of the variable frequency brushless motor mainly depends on the IPM module, so the IPM module will generate more heat during operation and has a stronger heat dissipation requirement. The closed space formed by the integrity of the main machine can form a reliable airflow and electric drive synchronization solution, which not only ensures the heat dissipation requirements of the IPM module on the power board, but also provides a food processor that can effectively reduce working noise, provide a wide range, large torque output, and a low overall height. Of course, the prior art also has a solution of setting a separate fan to dissipate heat for the power board; and a solution of setting a separate fan to dissipate heat for the power board and the motor respectively.

[0007] However, from the perspective of technological development trends, the above-mentioned solution repeats the technical problem of power separation between the main unit of the existing traditional wall-breaking machine with a motor and the mixing cup with a crushing blade. The motor needs to drive the crushing blade arranged in the mixing cup through a connecting head. The setting method of the heat dissipation duct of the variable frequency brushless motor and the driving requirements of the power board for the variable frequency brushless motor make it impossible for the variable frequency brushless motor to be simply placed in the mixing cup to directly drive the crushing knife like the traditional series-excited motor. The main reason is that the power board cannot be simply placed in the mixing cup, but needs to be placed in the main unit. In this way, the two core components, the variable frequency brushless motor and the IPM module, are respectively set in the mixing cup and the main unit. This requires the heat dissipation of the variable frequency brushless motor, the heat dissipation of the IPM module in the main unit, the installation of the variable frequency brushless motor and the power board, the electrical connection of the power board to the drive of the variable frequency brushless motor, etc., and multiple new technical problems. How to solve the above technical problems to realize the variable frequency brushless motor set in the mixing cup to realize the direct drive of the mixing knife, the drive of the variable frequency brushless motor is placed in the main unit to reduce the weight of the mixing cup, and the heat dissipation of the variable frequency brushless motor and the IPM module is optimized, so as to provide consumers with a better experience of the food processing machine, has become a difficult problem faced by technical personnel in this field. This is also the main reason why the prior art has disclosed a solution of directly setting the motor in the mixing cup for many years, but there is still no disclosed technical solution of setting a variable frequency brushless motor in the mixing cup to directly drive the crushing element. Utility Model Content

[0008] The main purpose of the utility model is to provide a food processing machine which directly drives the crushing parts by using a variable frequency brushless motor, and solve the technical problems of split heat dissipation and split drive caused by the separate setting of the variable frequency brushless motor and the IPM module, so as to provide a food processing machine which works stably, reliably and efficiently.

[0009] The utility model discloses a food processing machine, comprising a main unit component and a stirring cup component, wherein the stirring cup component comprises a cup body, a knife disc arranged at the bottom of the cup body and closing an opening at the bottom of the cup body, and a crushing piece arranged on the knife disc, wherein a cup bottom shell is arranged at the bottom of the cup body, and the main unit component comprises a main housing, wherein a variable frequency brushless motor for driving the crushing piece is arranged in the cup bottom shell, a power supply board for driving the variable frequency brushless motor is arranged in the main housing, the power supply board is electrically connected with the variable frequency brushless motor through a coupler, the power supply board has an IPM module and a heat sink for the IPM module, a motor heat dissipation duct for dissipating heat from the variable frequency brushless motor is formed in the cup bottom shell, a main unit heat dissipation duct for dissipating heat from the heat sink is formed in the main housing, when the stirring cup component is installed on the main unit component, the motor heat dissipation duct is communicated with the main unit heat dissipation duct, the knife disc is further provided with a heating piece, a motor accommodating cavity is arranged between the variable frequency brushless motor and the knife disc, and a temperature controller and a fuse are further arranged on the bottom wall of the knife disc located in the motor accommodating cavity.

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

[0011] Preferably, a sunken installation cavity is provided on the top of the main housing, the bottom wall of the installation cavity protrudes upward to form the air inlet duct, 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 duct and the air inlet groove are provided with through holes that are interconnected.

[0012] Preferably, the main housing is provided with an air inlet and an air outlet connected to the main housing heat dissipation duct, the main housing heat dissipation duct extends laterally so that the air inlet and the air outlet are staggered, and the air outlet is arranged at the top of the main housing so that the airflow is bent in the main housing heat dissipation duct and then flows into the motor heat dissipation duct through the air outlet.

[0013] Preferably, the host assembly is further provided with an air duct cover and an air outlet cover, the air duct cover is arranged outside the heat sink, the air outlet cover is connected to 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 retaining structure at the air outlet, and the water retaining structure is extended vertically downward to prevent the fluid from flowing back from the air outlet to the power board.

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

[0016] Preferably, an accommodating cavity for accommodating the variable frequency brushless motor is formed in the cup bottom shell, the cup bottom shell is provided with an air inlet connected to the accommodating cavity, the variable frequency brushless motor comprises a motor housing and a stator and a rotor located in the motor housing, the motor housing is provided with a motor air inlet and a motor air outlet connected to the accommodating cavity, and the cup bottom shell is also provided with an air guide hood connected to the motor air outlet and the exhaust duct.

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

[0018] Preferably, the power board is electrically connected to the heating element through the coupler, and the coupler includes a motor drive plug-in terminal and a heating drive plug-in terminal that are independent of each other.

[0019] By adopting the above technical solution, the utility model has the following beneficial effects.

[0020] 1. The food processing machine of the utility model adopts a variable frequency brushless motor to directly connect with the crushing parts to achieve the purpose of direct drive. The power board driving the variable frequency brushless motor is set in the main machine and separated from the variable frequency brushless motor to achieve the separation of the board and the machine. Such a setting not only meets the requirements of cup machine integration (i.e., the scheme in which the stirring cup and the motor are set as one), but also avoids the problems of insufficient structural space and inefficient heat dissipation when the control board is set in the stirring cup. The variable frequency brushless motor is used to directly drive the crushing parts. The stirring cup has low noise and stable and reliable working speed when working. It can also achieve speed adjustment in a wide range without setting a speed change device, and can also ensure that the variable frequency brushless motor outputs stable torque, realizing the technical upgrade and iteration of the food processing machine. The premise for achieving the above technical advantages is that the applicant, based on the accumulation of independent technology, changes the arrangement structure of the power board of the existing scheme, the electrical connection structure between the main machine component and the stirring cup component, and the airflow channel connection structure between the main machine component and the stirring cup component, etc., to achieve a new product structure scheme to realize the technical scheme of the present application. Specifically, the present application sets the power board in the host assembly, and the power board is electrically connected to the variable frequency brushless motor set in the stirring cup assembly through the coupler assembly to realize the drive of the variable frequency brushless motor. The main purpose of such setting is that the variable frequency brushless motor itself needs a separate drive. When the variable frequency brushless motor is separated from the power board, it is necessary to set a separate pin in the coupler through a separate coupler to realize the electrical connection between the variable frequency brushless motor and the power board. Further, the present application optimizes the structural arrangement of the power board, sets an IPM module (i.e., an intelligent power module, which is a highly integrated power electronic device that integrates power switching devices, drive circuits, and fault detection circuits such as overvoltage, overcurrent, and overheating) on ​​the power board, and further sets a heat sink for dissipating heat from the IPM module, and sets a host heat dissipation duct in the host to dissipate heat from the heat sink, so that it can be set as a host heat dissipation duct with a relatively concentrated structural space to dissipate heat from the heat sink in a concentrated and efficient manner, and will not be like the prior art where only a passage for air flow is set in the host and can only meet the heat dissipation of the motor in the stirring cup. Furthermore, the mixing cup assembly is provided with a cup bottom shell, and the cup bottom shell is used to form a motor heat dissipation duct for dissipating heat from the variable frequency brushless motor, thereby realizing heat dissipation of the variable frequency brushless motor itself; wherein, when the mixing cup assembly is installed in the host assembly, the motor heat dissipation duct is connected to the host heat dissipation duct, so that only one fan structure is provided to simultaneously meet the heat dissipation requirements of the heat sink and the variable frequency brushless motor. Preferably, the variable frequency brushless motor itself is provided with a fan, and the fan is used to drive the airflow to flow in the host heat dissipation duct and the motor heat dissipation duct, thereby realizing heat dissipation of the heat sink and the variable frequency brushless motor.This arrangement is also because, compared with traditional series-excited motors, the variable frequency brushless motor does not generate much heat and has a weaker need for heat dissipation. The high temperature area of ​​the power board itself is equipped with IPM modules (i.e., intelligent power modules, which are highly integrated power electronic devices that integrate power switching devices, drive circuits, and fault detection circuits such as overvoltage, overcurrent, and overheating), thyristor modules, and rectifier modules, which will generate a lot of heat when working, so a higher heat dissipation requirement is required. Therefore, under the premise of setting a heat sink, the host heat dissipation module is further set upstream of the motor heat dissipation module, so that the external cold air can first pass through the heat sink of the host heat dissipation module, and then flow to the variable frequency brushless motor of the motor heat dissipation module, thereby meeting the heat dissipation requirements of the power board and the variable frequency brushless motor. Since the variable frequency brushless motor is directly installed on the blending cup assembly, the variable frequency brushless motor can be directly installed on the knife disc, or a fixing part is provided at the bottom of the blending cup assembly for installing the variable frequency brushless motor, and the heating element needs to be provided in the space between the variable frequency brushless motor and the knife disc to achieve heating and cooking of the food in the blending cup assembly, and further, a component for detecting the processing status of the food processor is installed in the space between the variable frequency brushless motor and the knife disc, so that the installation space can be effectively utilized, and the distances between the thermostat, fuse, NTC, etc. and the variable frequency brushless motor and the heating element are reasonable, and the detection accuracy is more precise.

[0021] 2. An air inlet pipe and an air inlet slot are arranged between the main housing and the cup bottom housing, and the air inlet pipe and the air inlet slot are used to realize the connection between the main engine cooling air duct and the motor cooling air duct, thereby ensuring that the connection between the main engine cooling air duct and the motor cooling air duct is more reliable, especially conducive to improving the heat dissipation efficiency of the heat sink in the main engine cooling air duct, ensuring the safe and reliable operation of the variable frequency brushless motor itself and the power board.

[0022] 3. A sunken installation cavity is provided on the top of the main housing to facilitate the installation of the blender cup assembly and ensure that the blender cup assembly is securely installed. Further, an air inlet pipe is convexly provided on the bottom wall of the installation cavity, and an air inlet groove is formed by recessing the bottom wall of the cup bottom shell. When the blender cup assembly is installed in the installation cavity of the main housing, the air inlet pipe is inserted into the air inlet groove, thereby realizing the connection between the heat dissipation duct of the main unit and the heat dissipation duct of the motor. The air inlet pipe and the air inlet groove can also be used to realize the installation and positioning of the blender cup assembly by the main unit. The cup bottom shell is recessed inwardly, which means that the air inlet groove is recessed inwardly in the bottom wall of the cup bottom shell, that is, the air inlet groove is recessed upward from the bottom wall of the cup bottom shell. In this way, when the blender cup assembly is normally placed on the workbench, the air inlet groove will not affect the placement of the blender cup assembly. Preferably, through holes that are interconnected are provided on the side walls of the air inlet pipe and the air inlet slot to connect the heat dissipation duct of the main unit and the heat dissipation duct of the motor. The through holes in the side walls cause the airflow to bend when transmitting between the air inlet pipe and the air inlet slot, so as to guide the airflow in the main unit assembly on the lower side upward and into the mixing cup assembly on the upper side, thereby realizing a setting scheme in which the variable frequency brushless motor and the power board are stacked up and down in space, so as to compress the overall height of the food processor.

[0023] 4. The heat dissipation duct of the host is extended horizontally, so that the power board and the heat sink are arranged horizontally, which can solve the problem of the power board being too high when it is set vertically, and is conducive to reducing the height of the host. The air inlet and air outlet of the host are further staggered. Preferably, the air outlet is arranged at the top of the host shell, so that when the mixing cup assembly is installed on the host assembly, the heat dissipation duct of the host is connected with the heat dissipation duct of the motor through the air outlet. Of course, when the air inlet pipe and the air inlet slot are set, the air outlet can also be directly set on the corresponding air inlet pipe or air inlet slot. The air inlet is set at the top of the host shell, and the heat dissipation duct of the host is extended horizontally in the host shell, so that after the airflow passes through the heat dissipation duct of the host horizontally, it needs to be bent to flow upward to the heat dissipation duct of the motor. That is, the space size occupied by the host assembly itself is compressed, and the airflow passing through the heat dissipation duct of the host is gathered and then flows into the heat dissipation duct of the motor through the air outlet, so that the heat dissipation efficiency is higher; at the same time, it is conducive to reducing the noise of the airflow after the airflow is gathered.

[0024] 5. Further set up an air duct cover, set the air duct cover outside the heat sink, use the air duct cover to form a main unit heat dissipation air duct part outside the heat sink for heat dissipation of the heat sink, and further set up an air outlet cover on the main unit assembly, use the air outlet cover itself or between the air outlet cover and the main unit housing to form the air outlet section of the main unit heat dissipation air duct, connect the air duct cover and the air outlet to guide the airflow passing through the heat sink to the air outlet and then flow to the mixing cup assembly through the air outlet. Such a setting makes the main unit heat dissipation air duct set in the main unit assembly flow more smoothly and the heat dissipation is more efficient. The power board and the air duct cover are set horizontally, and the air outlet cover is set longitudinally, so that the airflow efficiently passes through the heat sink in the horizontal direction, then passes through the guide bend of the air outlet cover and passes through the air outlet in the longitudinal direction to reach the motor heat dissipation air duct, so as to achieve fast and efficient heat dissipation of the power board.

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

[0026] 7. An exhaust duct is further provided in the main housing, so that the motor cooling duct in the mixing cup assembly can be connected to the outside through the exhaust duct. In this way, the food processor forms a complete airflow path consisting of the main cooling duct, the motor cooling duct and the exhaust duct in the main assembly. The external airflow first dissipates heat to the power board through the main cooling duct, then flows into the mixing cup assembly to dissipate heat to the variable frequency brushless motor in the mixing cup assembly, and then returns from the mixing cup assembly to the exhaust duct of the main assembly, and is discharged from the main assembly through the exhaust duct. Generally speaking, the split mixing cup assembly is provided above the main assembly, and the exhaust duct is used to guide the airflow in the motor cooling duct to flow out, so as to avoid the airflow in the mixing cup assembly being directly discharged to the outside, and affecting the normal operation of the main assembly when it is discharged outside above the main assembly.

[0027] 8. An installation cavity is formed in the cup bottom shell, and the variable frequency brushless motor is directly installed in the installation cavity. Other components such as couplers can also be installed in the installation cavity accordingly. The installation cavity can be set up to install components such as the variable frequency brushless motor, and a channel for accommodating airflow can also be formed. The airflow flowing in from the heat dissipation duct of the host is collected in the installation cavity and then flows to the variable frequency brushless motor, which can also play a buffering effect. The variable frequency brushless motor is further provided with a motor shell to wrap the internal stator and rotor. The motor shell is provided with a motor air inlet and a motor air outlet. The airflow collected in the installation cavity is guided from the motor air inlet to the motor shell, and the stator and rotor are efficiently cooled, and then discharged through the motor air outlet. Then, an air guide cover is further provided in the cup bottom shell, and an airflow channel connecting the motor air outlet and the exhaust air duct in the host assembly is formed in the cup bottom shell by the air guide cover, so as to avoid the mixing of the air inlet airflow and the air outlet airflow in the cup bottom shell, thereby improving the heat dissipation effect of the variable frequency brushless motor.

[0028] 9. Further, mutually plugged exhaust pipes and exhaust slots are arranged between the main housing and the cup bottom housing, and the exhaust pipes and exhaust slots are used to realize the connection between the motor heat dissipation duct and the exhaust duct, thereby ensuring the reliability of the transmission connection between the two, improving the heat dissipation effect, and preventing the airflow and transmission noise from leaking from the connection between the main housing and the cup bottom housing to increase the noise of the food processor.

[0029] 10. A heating element is further arranged at the bottom of the cup bottom for heating the food in the blender cup assembly. Combined with the crushing element, multifunctional processing such as boiling and crushing can be realized. Therefore, the coupler is provided with independent motor drive plug-in terminals and heating drive plug-in terminals to realize the driving of the variable frequency brushless motor and the driving of the heating element respectively, thereby improving the working reliability of the variable frequency brushless motor and the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the entire food processing machine according to the first embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the exploded mainframe assembly of the first embodiment of the food processing machine of the utility model.

[0032] Figure 3 This is a schematic diagram of the exploded view of the power board assembly of the first embodiment of the food processor of the utility model.

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

[0034] Figure 5 This is a schematic diagram of the second state of the power board assembly of the first embodiment of the food processor of the utility model.

[0035] Figure 6 This is a schematic structural diagram of the main machine assembly of the first embodiment of the food processing machine of the present invention.

[0036] Figure 7 This is a schematic diagram of the second state structure of the main unit assembly of the first embodiment of the food processing machine of the utility model.

[0037] Figure 8 This is a schematic diagram of the exploded structure of the mixing cup assembly of the first embodiment of the food processor of the utility model.

[0038] Fig. 9 This is a cross-sectional view of a mixing cup assembly of a first embodiment of a food processor according to the utility model.

[0039] Fig.10 for Figure 6 A is a partial enlarged schematic diagram of the middle part.

[0040] Fig.11 This is a schematic diagram of the structure decomposition of the variable frequency brushless motor of the first embodiment of the food processing machine described in the utility model.

[0041] Fig.12 This is a schematic diagram of the structural state of the variable frequency brushless motor of the first embodiment of the food processing machine described in the utility model.

[0042] Fig.13 This is a schematic diagram of the heating element structure of the first embodiment of the food processing machine of the utility model.

[0043] Fig.14 This is a schematic diagram of the electrical connection function of the mixing cup assembly of the first embodiment of the food processor of the utility model.

[0044] Fig.15 This is a schematic diagram of the electrical connection functions of the mainframe components of the first embodiment of the food processing machine described in the utility model.

[0045] Fig.16 This is a schematic diagram of the electrical connection functions of the control module of the first embodiment of the food processor described in the present invention.

[0046] Fig.17 This is a schematic diagram of the air intake path structure of the first embodiment of the food processing machine of the utility model.

[0047] Fig.18 It is a schematic diagram of the exhaust duct structure of the first embodiment of the food processing machine described in the utility model.

[0048] Fig.19 This is a schematic diagram of the exhaust path structure of the first embodiment of the food processing machine described in the utility model.

[0049] Fig. 20This is a schematic diagram of the exploded structure of the main unit assembly of the second embodiment of the food processing machine of the present invention.

[0050] Fig.21 This is a schematic diagram of the air intake path structure of the second embodiment of the food processing machine of the utility model.

[0051] Fig. 22 This is a schematic diagram of the exhaust path structure of the second embodiment of the food processing machine of the utility model.

[0052] The corresponding names in the figure are as follows:

[0053] 001. Main unit assembly; 002. Blender cup assembly; 1. Main unit housing; 11. Upper housing; 110. Mounting cavity; 111. Mounting hole; 113. Air outlet hood; 114. Air inlet; 115. Air exhaust hood; 12. Lower housing; 121. Air outlet; 122. Water leakage hole; 13. Control panel; 141. Air inlet pipe; 142. Air outlet; 143. Air exhaust pipe; 144. Air inlet hole for exhaust; 2. Cup body; 201. Mounting protrusion; 202. Handle; 203. Upper turn button; 21. Crushing part; 22. Blade disc; 220. Motor housing cavity; 221. Heating tube; 222. Sealing ring; 223. Fixing ring; 224. Motor ring; 225. Thermostat; 226. NTC; 227. Fuse; 228. Safety switch; 23. Cup bottom shell; 230. Accommodating cavity; 231. air inlet slot; 232. air inlet; 233. motor exhaust hood; 234. motor exhaust outlet; 235. exhaust slot; 240. lower screw buckle; 24. cup base; 25. sealing ring; 3. cup cover; 4. variable frequency brushless motor; 41. motor shaft; 42. rotor; 421. fan; 43. stator; 44. motor lower shell; 45. motor air inlet; 46. motor air outlet; 5. power board assembly; 51. power board; 510. high temperature area; 511. heat sink; 512. control unit; 52. duct cover; 521. duct cavity; 522. water retaining rib; 523. drainage hole; 53. water retaining plate; 6. host cooling duct; 7. motor cooling duct; 72. motor outlet duct; 81. upper coupler; 82. lower coupler; 9. exhaust duct. DETAILED DESCRIPTION

[0054] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0055] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0056] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. As for the positional relationships such as "upstream" and "downstream", they are based on the positional relationships when the fluid flows normally.

[0057] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0059] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0060] As a food processing machine described in the utility model, Figure 1-22As shown, the food processor includes a main assembly and a mixing cup assembly, the mixing cup assembly is detachably placed on the main assembly, the mixing cup assembly includes a cup body, a crushing piece, a cup bottom shell and a variable frequency brushless motor, the crushing piece is arranged in the cup body, the variable frequency brushless motor drives the crushing piece, and the cup bottom shell is sleeved on the outside of the variable frequency brushless motor. The main assembly includes a main housing and a power board arranged in the main housing, the main assembly and the mixing cup assembly are electrically connected through a coupler, and the power board is electrically connected to the variable frequency brushless motor through a coupler so that the power board drives the variable frequency brushless motor. The power board is provided with an IPM module and a heat sink for dissipating heat from the IPM module. The cup bottom shell is formed with a motor cooling duct for dissipating heat from the variable frequency brushless motor, and the main body shell is provided with a host cooling duct for dissipating heat from the heat sink, so that when the mixing cup is installed on the main body assembly, the host assembly duct is connected with the motor cooling duct, so that the airflow flows through the host cooling duct to the motor cooling duct, so as to achieve heat dissipation of the power board and the variable frequency brushless motor respectively. By setting a variable frequency brushless motor to directly drive the crushing part, the advantages of the variable frequency brushless motor itself, stable and reliable operation, wide speed adjustment range, low working noise, large and reliable output torque, can be fully utilized to achieve variable frequency direct drive crushing of the food processor. Correspondingly, the drive module and the variable frequency brushless motor are separately arranged in the main unit component, and the variable frequency brushless motor is driven by a coupler. On this basis, by optimizing the arrangement of the power board, a high temperature zone is set and a heat sink is arranged in the high temperature zone, and a main unit heat dissipation duct is formed in the main unit component. Correspondingly, a motor heat dissipation duct is set in the stirring cup component, and the motor heat dissipation duct is connected with the main unit heat dissipation duct, and finally the simultaneous heat dissipation of the variable frequency brushless motor and the power board is achieved.

[0061] Embodiment 1.

[0062] As a first embodiment of a food processing machine described in the utility model, Figure 1-19As shown, the food processor includes a host assembly 001 and a mixing cup assembly 002. The mixing cup assembly 002 includes a cup body 2, a crushing piece 21 and a knife disc 22. A cup cover 3 is provided at the upper opening of the cup body 2. The knife disc 22 closes the lower opening of the cup body 2. The crushing piece 21 is rotatably mounted on the knife 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. A cup bottom shell 23 is provided outside the variable frequency brushless motor 4. The host assembly 001 includes a main housing 1. A power board assembly 5 for driving the variable frequency brushless motor 4 is provided inside the main housing 1. The power board assembly 51 includes a power board 51 and an air duct cover 52. The power board 51 is provided with a high temperature area 510. The high temperature area 510 is provided with a heat sink 511. The air duct cover 52 is provided outside the heat sink 511. One side of the air duct cover 511 has an air duct cavity 521 for accommodating the heat sink 511. The main housing 1 is provided with a main heat dissipation duct 6 for dissipating heat from the heat sink 511, and the cup bottom housing 23 is provided with a motor heat dissipation duct 7 for dissipating heat from the variable frequency brushless motor 4. A mutually plug-in coupler is also provided between the main assembly 001 and the stirring cup assembly 002, and the coupler includes an upper coupler 81 provided on the stirring cup assembly 002 and a lower coupler 82 provided on the main assembly 001. When the stirring cup assembly 002 is installed in the main assembly 001, the upper coupler 81 and the lower coupler 82 are mutually plugged to realize electrical connection, so that the power board 51 and the variable frequency brushless motor 4 are electrically connected. At the same time, the main heat dissipation duct 6 and the motor heat dissipation duct 7 are mutually connected, so that the airflow in the main assembly 001 can flow into the stirring cup assembly 002, so as to realize heat dissipation of the power board 51 and the variable frequency brushless motor 4 at the same time.

[0063] 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 unit installation space inside. The power board 51 and the air duct cover 52 are transversely arranged at the bottom of the main unit installation space, and a mounting hole 111 is arranged on the front side of the upper housing 11. The mounting hole 111 is arranged at the control panel 13, and the user can operate the control panel 13 to realize the operation of the food processor.

[0064] The power board 51 is provided with a driving module to drive the variable frequency brushless motor 4, which usually includes an IPM module, a thyristor module and a rectifier module. These three modules will generate more heat when working. These three modules are arranged at similar positions on the power board 51 to form a high temperature zone. Heat sinks are arranged on the outside of the three modules to dissipate heat for the three modules at the same time, which can ensure that the power board 51 works stably and reliably. A duct cover 52 is further provided, and a duct cavity 521 is provided on one side of the duct cover 52. The heat sink 511 can be placed in the duct cavity 521, so that the duct cavity 521 forms a part of the main cooling duct 6. An air outlet cover 113 is also provided in the main housing 1. The air outlet cover 113 and the air duct cover 52 guide the fluid, so that the airflow in the air duct cavity 521 is discharged from the main housing 1 through the air outlet cover 113.

[0065] The main housing 1 is also provided with an exhaust duct 9, and the motor heat dissipation duct 7 is connected with the main heat dissipation duct 6 and the exhaust duct 9 respectively. When the mixing cup assembly 002 is installed on the main assembly 001, the airflow flows into the main assembly from the main heat dissipation duct 6, flows into the motor heat dissipation duct after passing through the power board, dissipates the heat of the variable frequency brushless motor, and then returns to the exhaust duct of the main assembly, and is discharged from the main assembly through the exhaust duct. In this way, the food processor forms a complete airflow channel path between the mixing cup assembly and the main assembly, that is, the heat dissipation of the variable frequency brushless motor in the mixing cup assembly and the power board in the main assembly is achieved, and the gas is ensured to enter and exit from the main assembly, so as to better control the flow direction of the airflow and avoid arbitrary discharge when the airflow is not controlled in a disordered manner. Preferably, an exhaust hood 115 is provided in the main housing 1, and the exhaust duct 9 is formed inside the exhaust hood 115. The exhaust hood 115 is located at the top of the main housing 1 and is also provided with an exhaust air inlet hole 144. The exhaust air duct 9 is connected to the motor heat dissipation duct 7 through the exhaust air inlet hole 144.

[0066] like Figure 8-13As shown, the cup body 2 is configured to be tubular with openings at both ends. Preferably, the cup body 2 is made of glass, and the cup cover 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, and the handle 202 is fixedly connected to the cup body 2 through the mounting protrusion 201, and the user can operate the stirring cup assembly through the handle 202. The blade disc 22 is arranged at the lower end opening of the cup body 2 to close the lower end opening of the cup body 2, and a variable frequency brushless motor 4 is installed at the bottom of the blade disc 22. The stirring cup assembly 002 also includes a cup base 24, and the blade disc 22 and the variable frequency brushless motor 4 are fixedly connected to the bottom of the cup body 2 through the cup base 24, wherein an upper screw buckle 203 and a lower screw buckle 240 that are screwed together are provided between the cup body 2 and the cup base 24, and the cup base 24 is fixed to the bottom of the cup body 2 by screwing the upper screw buckle 203 and the lower screw buckle 240. A sealing ring 25 is also clamped between the blade disc 22 and the cup body 2. The outer side of the cup base 24 and the variable frequency brushless motor 4 is also arranged on a 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 accommodating cavity 230 inside. The upper coupler 81 is also arranged in the accommodating cavity 230 and extends out of the cup bottom shell 23.

[0067] Preferably, a heating tube 221 is embedded in the blade disc 22, a sealing ring 222 extends downward from the side wall of the blade disc 22, and a fixing ring 223 extends outward from the bottom of the sealing ring 222. The sealing ring 25 is sleeved outside the sealing ring 222, and the 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 allows the sealing ring 222 and the blade disc 22 to extend into the interior of the cup body 2.

[0068] Preferably, the bottom wall of the blade disc 22 is also provided with a motor ring 224 extending downward, wherein the blade disc 22 constitutes the upper shell of the variable frequency brushless motor 4, the rotor 42, the stator 43 and the motor lower shell 44 of the variable frequency brushless motor 4 are directly fixedly mounted on the blade disc 22, the motor shaft 41 of the variable frequency brushless motor 4 passes through the blade disc 22 and is connected to the crushing piece 41 to directly drive the crushing piece 41, and the other end of the motor shaft 41 opposite to the crushing piece 41 is also provided with a fan 421, and the fan 421 can drive the airflow to flow in the variable frequency brushless motor when the variable frequency brushless motor is working, and further make the airflow flow in the motor heat dissipation duct and the host heat dissipation duct. At the same time, a motor accommodating chamber 220 is formed between the rotor 42, the stator 43 and the motor ring 224, and preferably, a thermostat 225, an NTC 226 and a fuse 227 are installed in the motor accommodating chamber 220. Preferably, the heating tube 221 is radially located outside the motor ring 224 to reduce the influence of the heating tube 221 on the thermostat 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 motor lower shell 44.

[0069] like Figure 14-16As shown, the mixing cup assembly 002 is electrically connected to the main assembly 001 through an upper coupler 81 and a lower coupler 82. The variable frequency brushless motor 4 is arranged in the mixing cup assembly 002, and the mixing cup assembly 002 is also provided with a heating tube 221, a thermostat 225, an NTC 226 and a fuse 227. Preferably, a safety switch 228 is also provided between the cup cover 3 and the cup body 2. When the cup cover 3 is opened, the safety switch 228 disconnects the power supply to play a safety function. The power board 51 is provided with a control unit 512, which usually includes an IPM module, a thyristor module and a rectifier module, etc. 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 so that the user can operate the food processor through the control panel 13. The existing food processor with integrated cup machine (i.e., the motor is set in the mixing cup) uses a traditional series-excited motor. The motor and the heating tube can share L, N and ground wire (or live wire, neutral wire and ground wire). At the same time, the control signal line and the safety switch control line are added to realize the electrical connection between the upper coupler and the lower coupler. In the present application, the control unit and the variable frequency brushless motor 4 are respectively set between the host assembly and the mixing cup assembly. The variable frequency brushless motor requires separate motor U, motor V, and motor W lines to realize the drive. The corresponding heating tube requires heating L, heating N and ground wire (GND). Further, the coupler assembly also requires a processing signal line (NTC) and a safety switch line (SW) to realize the normal operation of the food processor. Of course, it can be understood that the processing signal line can also realize signal transmission by wireless transmission. Therefore, the upper coupler and the lower coupler are provided with independent motor drive plug-in terminals and heating drive plug-in terminals, that is, at least 7 plug-in terminals are required to realize electrical connection between the upper coupler and the lower coupler.

[0070] like Figure 17-19As shown, a sunken installation cavity 110 is provided on the top of the upper shell 11, and an air inlet pipe 141 is provided on the bottom wall of the upper shell 11 located in the installation cavity 110. The bottom wall of the cup bottom shell 23 is recessed inward to form an air inlet groove 231. When the blending cup assembly 002 is installed in the installation 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 mutually connected 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 host heat dissipation duct 6 of the host assembly and the motor heat dissipation duct 7 of the blending cup assembly are connected through the air outlet 142 and the air inlet 232. The air inlet and the air outlet are arranged on the side wall, and the airflow flowing in from the heat dissipation duct of the host is bent in the air inlet groove and then flows out from the air inlet. On the one hand, the airflow can avoid the decrease in heat dissipation efficiency caused by too fast flow rate when flowing in a straight line after bending, and also avoid the increase in noise when the flow rate is too fast; on the other hand, if the air outlet of the air inlet pipe is arranged directly upward, the liquid is easy to flow from the air outlet into the air inlet pipe and further flow back to the power board in the heat dissipation duct of the host. Setting the air outlet on the inner wall can avoid the reflux of the liquid.

[0071] Correspondingly, the main housing 1 is provided with an air inlet 114. Preferably, the air inlet 114 is provided in the lower housing 12. Since the power board 51 and the air duct cover 52 are arranged in the transverse direction, the air inlet 114 and the air outlet 142 are arranged in the transverse offset of the main housing 1. An air outlet cover 113 is provided at the downstream end of the main heat dissipation air duct 6. Preferably, the air outlet cover 113 is arranged in the longitudinal direction. Since the air outlet 142 is provided at the top of the main housing 1, the airflow flows into the main housing 1 and into the main heat dissipation air duct 6 through the air inlet 114, and after flowing through the heat sink 511, it turns upward in the heat dissipation air duct 6, and then flows out of the main housing from the air inlet pipe 141 and the air outlet 142 after passing through the air outlet cover 113. The air inlet and air outlet of the main housing are staggered, and the power board extends horizontally. The airflow flows into the heat dissipation duct of the main housing from the air inlet and then passes through the heat sink horizontally. The heat dissipation area of ​​the heat sink can be increased by utilizing the horizontal size of the main housing, thereby improving the heat dissipation efficiency. The airflow bends upward after passing through the heat sink in the heat dissipation duct of the main housing, and flows into the motor heat dissipation duct through the air outlet. The bend prevents the airflow from flowing too fast or too loudly when it passes through. At the same time, the upward bend guides the airflow from the horizontal direction to the vertical direction, thereby making it unnecessary for the variable frequency brushless motor to be arranged at the same height as the power board. In this way, the variable frequency brushless motor and the power board can be separated, thereby realizing the technical solution of setting the variable frequency brushless motor in the stirring cup.

[0072] The cup bottom shell 23 has an accommodating cavity 230 formed inside, and the variable frequency brushless motor 4 is located in the accommodating cavity 230, and the accommodating cavity 230 is connected to the external space or the heat dissipation duct of the host 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, and the motor air inlet 45 is connected to the accommodating cavity 230, so that the airflow flowing in from the heat dissipation duct of the host first flows into the accommodating cavity 230, and then flows into the variable frequency brushless motor 4 through the motor air inlet 45, so as to dissipate the stator and rotor of the variable frequency brushless motor 4. The cup bottom shell 23 is further provided with a motor exhaust hood 233 connected to the motor air outlet 46, and the motor exhaust hood 233 is extended downward in the longitudinal direction. The cup bottom shell 23 is also provided with an exhaust groove 235 connected to the motor exhaust hood 233 at the bottom, and the motor exhaust hood 233 and the exhaust groove 235 are connected through a motor exhaust outlet 234. Preferably, the motor exhaust outlet 234 is set as a plurality of small holes. An exhaust hood 115 is provided in the main housing, and an exhaust duct 9 is formed inside the exhaust hood 115. The exhaust hood 115 extends downward in the longitudinal direction. An exhaust pipe 143 is provided at the top of the main housing 1. The exhaust pipe 143 protrudes from the top of the main housing 1 and extends upward and can extend into the exhaust slot 235. An exhaust air inlet hole 144 is also provided at the top of the exhaust pipe 143. The airflow in the motor exhaust hood 233 flows back to the exhaust duct 9 of the main assembly through the motor exhaust outlet 234 and the exhaust air inlet hole 144. An exhaust port 121 is also provided at the bottom of the side wall of the lower housing 12, and the exhaust duct 9 is connected to the outside through the exhaust port 121. The motor air inlet and motor air outlet of the variable frequency brushless motor are both arranged on the side wall, and the air flow can enter the variable frequency brushless motor from the side wall and then be discharged from the variable frequency brushless motor. The heat dissipation structure of the variable frequency brushless motor does not occupy the axial space of the variable frequency brushless motor, and can compress the axial height of the variable frequency brushless motor, thereby reducing the axial height of the stirring cup assembly; further, the motor exhaust cover and the exhaust slot are arranged downward in the longitudinal direction, and can guide the air flow flowing through the variable frequency brushless motor downward and discharge it from the stirring cup assembly, so that the variable frequency brushless motor arranged in the stirring cup assembly can achieve sufficient heat dissipation and provide the reliability of the variable frequency brushless motor; and then an exhaust duct is arranged in the main housing, and the air flow in the stirring cup assembly is discharged from the main assembly through the exhaust duct. Preferably, the exhaust port is arranged at the bottom of the main housing, so that the air flow can be discharged at the bottom of the main assembly to avoid the air flow from directly dispersing outward when being discharged from the side wall of the stirring cup assembly and affecting the user. The blending cup assembly and the main unit assembly are further connected via an exhaust pipe and an exhaust slot, which can improve the reliability of the connection between the motor heat dissipation duct and the exhaust duct, thereby ensuring that the hot air flow exhausted from the motor heat dissipation duct can be fully discharged from the main unit assembly through the exhaust duct, thereby improving the reliability of heat dissipation.

[0073] By providing the main machine heat dissipation duct, the motor heat dissipation duct and the exhaust duct, the food processing machine forms a complete air flow channel. Fig.17 As shown, when the food processor is working, the fan 421 rotates and drives the air flow, thereby driving the air flow from the air inlet into the main housing, and passing through the high temperature area of ​​the power board horizontally to dissipate the heat of the control unit of the power board. The air flow further bends and flows upward into the air outlet cover, and flows into the accommodating cavity of the cup body assembly through the air outlet and the air inlet. The air flow then enters the variable frequency brushless motor through the motor air inlet, dissipates the heat of the stator and rotor, and is then discharged through the motor air outlet. In this way, the heat dissipation of the power board and the variable frequency brushless motor is achieved. Further, as Fig.18 , 19 As shown, the airflow discharged from the variable frequency brushless motor is bent and guided downward through the motor exhaust cover and discharged from the mixing cup assembly, flows back into the main housing through the exhaust air inlet hole, flows through the exhaust air duct and then is discharged from the main housing through the exhaust port, thereby achieving complete heat dissipation of the food processor.

[0074] By setting the above scheme, the variable frequency brushless motor and the power board which need to be arranged in the same space in the prior art are separately arranged in the mixing cup assembly and the main unit assembly, so that the variable frequency brushless motor in the mixing cup assembly can directly drive the crushing parts. The power board arranged in the main unit assembly is arranged to form a high temperature zone, and the heat sink is used to efficiently dissipate the heat in the high temperature zone, so that when the variable frequency brushless motor and the power board are separately arranged, the heat dissipation of the variable frequency brushless motor and the power board can still be achieved through the connected heat dissipation duct at the same time.

[0075] It is understandable that the air inlet pipe and air inlet slot may not be provided between the blending cup assembly and the main unit assembly, and mutually communicating through holes may be provided between the blending cup assembly and the main unit assembly, and a seal may be provided at the through hole to ensure reliable airflow communication between the main unit assembly and the blending cup assembly. Similarly, the exhaust pipe and exhaust slot may not be provided between the blending cup assembly and the main unit assembly.

[0076] It is understandable that the installation cavity for installing the blending cup assembly may not be provided on the top of the main housing, and the blending cup assembly and the main assembly may be fixedly installed by extending the lateral dimension of the main housing and providing a fixing structure on the top of the main housing, or by using a coupler.

[0077] It is understandable that the air inlet can be arranged at different positions according to the shape of the main housing. Similarly, according to the installation position of the mixing cup assembly and the main assembly, the air outlet can be arranged on the side wall of the main housing to communicate with the motor heat dissipation duct.

[0078] It is understandable that the power board can also be installed vertically in the host assembly, the air inlet is set at the bottom of the host assembly, the air outlet is set at the top of the host housing, and the airflow passes through the heat sink of the power board from bottom to top to dissipate heat in the high temperature area. Therefore, the host heat dissipation duct is not provided with a bending structure. Further, the heat sink is provided as a plurality of fins arranged in sequence, and the fins extend along the airflow direction of the host heat dissipation duct, or the extension direction of the fins is perpendicular to the airflow direction of the host heat dissipation duct.

[0079] It is understandable that when the main housing is extended laterally to reduce the axial height, the blender cup assembly is directly mounted on the main housing assembly, so that the airflow of the motor heat dissipation duct can be directly discharged from the blender cup assembly without providing the exhaust duct. Alternatively, the main housing assembly can also be provided with an exhaust duct outside the main housing that is connected to the motor heat dissipation duct.

[0080] It is understandable that a channel connected to the motor air inlet may also be provided in the cup bottom shell, so that the airflow discharged from the variable frequency brushless motor flows directly to the accommodating cavity; or is directly discharged from the stirring cup assembly through the motor air outlet.

[0081] Embodiment 2.

[0082] As a second embodiment of the food processing machine of the utility model, Figure 20-22 As shown, compared with the first embodiment, in this embodiment, a water retaining structure is further provided in the heat dissipation duct of the host. It should be noted that the specific first embodiment and the second embodiment described separately do not mean that the cases of the two embodiments are completely independent of each other, but are only for the purpose of specifically illustrating the two preferred technical solutions, and the technical features and technical solutions of the two embodiments are common and can be used for reference.

[0083] like Figure 20-22As shown, a water retaining structure is provided in the heat dissipation air duct of the host, and the water retaining structure includes a water retaining plate 53 provided in the heat dissipation air duct 6 of the host. Specifically, the air duct cover 52 is provided with an air duct cavity 521 for accommodating the heat sink of the power board 51, and a water retaining rib 522 is provided on the downstream side of the air duct cavity 521, and the water retaining rib is formed by extending vertically upward from a side wall of the air duct cover 52, and an air outlet cover 113 is provided between the air duct cavity 521 and the air outlet 142, so that the airflow flows horizontally along the air duct cavity 521, bends upward, flows through the air outlet cover 113, and flows out of the host housing 1 through the air outlet 142. The drainage plate 53 is arranged at the connection between the air duct cavity 521 and the air outlet cover 113, the water baffle plate 53 extends vertically downward, and the water baffle plate 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 arranged at the lower end of the water baffle plate 53. Preferably, the height difference between the upper end of the water baffle rib 522 and the lower end of the water baffle plate 53 is not less than 1 mm.

[0084] like Fig.21 As shown, with such arrangement, after the airflow flows through the heat sink, it is blocked by the water retaining rib 522 and the water retaining plate 53, and the airflow first bends downward, then bends upward, and then is discharged from the main housing through the air outlet cover. If liquid such as water or overflowed slurry flows into the main housing from the air outlet at the top of the main housing, the liquid is blocked by the water retaining plate and cannot flow back to the power board; further, since the water retaining rib is arranged at the bottom end of the water retaining rib, it can better play a blocking role. In this way, it can prevent the liquid from flowing to the power board, playing a better safety role.

[0085] Preferably, a drainage hole 523 connected to the outside is provided at the bottom of the water retaining rib 522. The liquid flowing into the heat dissipation duct of the host is blocked by the water retaining rib, gathered at the bottom of the water retaining rib, and then discharged from the host casing through the drainage hole without being able to gather in the heat dissipation duct of the host.

[0086] Preferably, the bottom of the exhaust duct of the exhaust cover 115 is also provided with a leaking hole 122, and the leaking hole 122 is provided on the lower shell 12. When liquid flows into the exhaust duct from the exhaust air inlet hole, it can be blown out from the exhaust port 121 or leaked out from the leaking hole 122. Furthermore, the bottom height of the exhaust air inlet hole 144 can be set to be lower than the bottom height of the air outlet 142. In this way, if there is liquid remaining in the installation cavity 110 of the main housing 1, the liquid first flows from the exhaust air inlet hole 144 to the exhaust duct, and is discharged from the main housing through the leaking hole. Since there are no electrical components and other components in the exhaust duct, there is no safety risk. Therefore, it can play the function of actively discharging liquid, thereby improving the safety of the food processor.

[0087] The above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A food processor, comprising a main unit assembly and a mixing cup assembly, wherein the mixing cup assembly comprises a cup body, a knife disc disposed at the bottom of the cup body to close an opening at the bottom of the cup body, and a crushing member disposed on the knife disc, the bottom of the cup body is provided with a cup bottom shell, and the main unit assembly comprises a main housing, characterized in that: A variable frequency brushless motor for driving the crushing element is provided in the cup bottom shell, a power board for driving the variable frequency brushless motor is provided in the main housing, the power board is electrically connected to the variable frequency brushless motor through a coupler, the power board has an IPM module and a heat sink for dissipating heat from the IPM module, a motor heat dissipation duct for dissipating heat from the variable frequency brushless motor is formed in the cup bottom shell, a main housing heat dissipation duct for dissipating heat from the heat sink is formed in the main housing, the motor heat dissipation duct is connected with the main housing heat dissipation duct when the mixing cup assembly is installed in the main housing assembly, the cutter disc is also provided with a heating element, a motor accommodating cavity is provided between the variable frequency brushless motor and the cutter disc, a thermostat and a fuse are also provided on the bottom wall of the cutter disc located in the motor accommodating cavity.

2. The food processor according to claim 1, characterized in that: An air inlet pipe and an air inlet slot which are plugged into each other are arranged between the main housing and the cup bottom housing, and the air inlet pipe and the air inlet slot are respectively connected to the main unit heat dissipation air duct and the motor heat dissipation air duct.

3. The food processing machine according to claim 2, characterized in that: A sunken installation cavity is provided on the top of the main housing, the bottom wall of the installation 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 slot, and the side walls of the air inlet pipe and the air inlet slot are provided with through holes that are interconnected.

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

5. The food processing machine according to claim 4, characterized in that: The host assembly is further provided with an air duct cover and an air outlet cover. The air duct cover is arranged outside the heat sink, and the air outlet cover is connected to 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 processor according to claim 4, characterized in that: The host heat dissipation air duct is also provided with a water retaining structure at the air outlet, and the water retaining structure is vertically extended downward to prevent the fluid from flowing back from the air outlet to the power board.

7. The food processor according to claim 1, characterized in that: An exhaust air duct is also provided in the main housing, and the motor heat dissipation air duct is communicated with the main body heat dissipation air duct and the exhaust air duct respectively, so that the air flow flows through the main body heat dissipation air duct, the motor heat dissipation air duct and the exhaust air duct in sequence.

8. The food processor according to claim 7, characterized in that: A housing cavity for accommodating the variable frequency brushless motor is formed in the cup bottom shell, the cup bottom shell is provided with an air inlet connected to the housing cavity, the variable frequency brushless motor comprises a motor housing and a stator and a rotor located in the motor housing, the motor housing is provided with a motor air inlet and a motor air outlet connected to the housing cavity, and the cup bottom shell is also provided with an air guide hood connected to the motor air outlet and the exhaust duct.

9. The food processor according to claim 7, characterized in that: An exhaust pipe and an exhaust slot which are plugged and connected to each other are arranged between the main housing and the cup bottom housing, and the exhaust pipe and the exhaust slot are respectively connected to the motor heat dissipation duct and the exhaust duct.

10. The food processor according to claim 1, characterized in that: The power board is electrically connected to the heating element through the coupler, and the coupler includes a motor drive plug-in terminal and a heating drive plug-in terminal that are independent of each other.

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