Variable-frequency direct-drive food processor

Abstract

The invention provides a variable-frequency direct-drive food processor which comprises a cup body assembly, a cup body with a processing cavity, a cup cover covering an upper end opening of the cup body, a smashing cutter arranged in the processing cavity and a cup base arranged on the lower portion of the cup body, a heating disc and a brushless motor are arranged in the cup base, and the brushless motor comprises a stator assembly and a rotor assembly. The rotor assembly comprises a rotor shaft, and the rotor shaft directly drives the crushing cutter to rotate; the host comprises a shell and an intelligent power driving module fixedly arranged in the shell, and the intelligent power driving module is used for driving the brushless motor; the coupler comprises a coupler male end arranged on the cup body assembly and a coupler female end arranged on the host; the brushless motor is detachably connected with the host along with the cup body assembly, the brushless motor is electrically connected with the intelligent power driving module through the coupler, the number of PINs at the male end of the coupler is N, and N is larger than or equal to 7, so that the brushless motor is integrally arranged on the cup body assembly.

Description

Technical Field

[0001] This invention belongs to the field of food processing machines, and particularly relates to a food processing machine in which the rotor shaft of a variable frequency motor is directly connected to and drives the pulverizing blade to rotate. Background Technology

[0002] Existing food processing machines generally include a main unit and a detachable cup assembly mounted on the main unit. The main unit houses a series-wound motor with a lower connector on its output shaft. The cup assembly includes the cup body, a pulverizing blade, and a pulverizing blade shaft. An upper connector is located at the lower end of the pulverizing blade shaft. The power output from the series-wound motor is transmitted to the pulverizing blade through the transmission between the lower and upper connectors. Because food processing machines use high-speed rotating pulverizers to process food, the detachable, aligned connection between the upper and lower connectors is prone to resonance and localized eccentricity at the connector, affecting transmission stability and exacerbating the transmission and vibration noise of the series-wound motor.

[0003] Existing technology has optimized the transmission system of food processors operating at high speeds. Patent application CN201921599967.0 discloses a food processor cup with an improved motor mounting structure, including a cup body, a lid, a base, a heating plate, a motor, and a blade assembly. The upper end of the base is fixedly connected to the lower end of the cup body. The heating plate is positioned inside the lower opening of the cup body, sealing it. The motor is housed within the cavity of the base and located below the heating plate. The motor shaft passes through a hole in the heating plate, extends into the cup body, and connects to the blade assembly. Screws pass through a through-hole in the motor from bottom to top and engage with a support base, suspending and fixing the motor to the heating plate, forming an integrated structure of the motor and heating plate. This design integrates the motor and heating plate, eliminating the complex transmission structure where the pulverizing blades and motor shaft are connected via a connector, thus reducing transmission noise. However, this solution still relies on a series motor drive mode. Especially with the series motor fixed to the blender cup, the motor itself generates significant noise and heat, further exacerbated by the heat radiation from the heating plate. Furthermore, the carbon brushes of the series motor produce carbon powder that accumulates inside the cup holder, potentially causing harm to the user. Additionally, the motor's large vertical space occupies the cup holder, significantly increasing its height and weight, making it inconvenient for users to remove and reassemble the blender cup from the main unit.

[0004] Addressing the issue of excessive motor temperature rise and low heat dissipation efficiency caused by the series-wound motor being located inside the cup holder, patent application number CN201920286880.1 discloses a high-speed blender with an air inlet pipe, comprising a base, a motor, a blade assembly, a fan, an operation panel, a main control board, and a cup assembly. The operation panel is located on the base. The cup assembly includes a cup body, a cup lid assembly, a base plate with an electric heating element, a blade shaft seat and a cup holder located on the base plate, and the lower end of the cup body, the base plate, and the cup holder are detachably connected as a whole. The motor is fixed on a motor base. During use, the fan rotates, drawing indoor air through the indoor air inlet on the base, the fan, the air inlet pipe, the air inlet on the bottom plate of the housing, and the air inlet on the bottom plate of the sleeve on the air guide component, into the sleeve. Then, through the air guide holes on the rear end cover, the air guide duct, and the air guide holes on the front end cover of the motor, the air enters the annular ventilation duct formed by the sleeve and the support base. Finally, through the air outlet holes on the air guide plate and the air outlet holes on the bottom plate of the housing, the air enters the base and is discharged through the exhaust hole. This solution still uses a series motor as the power source and optimizes the heat dissipation duct of the series motor to combine the internal heat dissipation paths of the main unit and the cup holder, focusing on solving the problem of excessive temperature rise of the series motor. However, the duct structure is complex and still cannot overcome the noise and hygiene safety issues associated with placing the series motor inside the cup holder.

[0005] To fundamentally overcome the problems of large size, high power source noise, and high noise and low heat dissipation efficiency of series motors in food processing machines, patents with application numbers CN202010958852.7 and CN202120355518.2 disclose a flat food processing machine driven by a brushless motor. The machine includes a base and a mixing cup mounted on the base. The base includes a housing, a motor, and an air duct flowing through the motor. Along the airflow direction, the air duct includes an air inlet channel upstream of the motor, an air outlet channel downstream of the motor, and a heat dissipation cavity between the air inlet and outlet channels. The air outlet channel is arranged around the side wall of the motor. This solution fundamentally solves the problem of excessively high overall height of the food processing machine due to the large size of the series motor, as well as the problems of carbon brush commutation noise and carbon powder dust residue from the series motor. It eliminates hygiene and safety issues at the source and optimizes the sound quality of the power system itself. However, this approach, designed for the stability of the food processor's power system, places the brushless motor and control system within the main unit, transmitting power to the pulverizing blades via a connector. This still presents issues with power transmission stability and noise, especially when the brushless motor switches directions, causing the connector to revert accordingly. The torque exerted during this reversal leads to significant wear and tear on the connector. Those skilled in the art typically leverage the inherent stability and transmission reliability of the brushless motor itself to offset the reliability and noise issues of the connector. Therefore, improving transmission stability, heat dissipation efficiency, and pulverizing performance of the brushless motor platform in food processors remains a pressing issue. Summary of the Invention

[0006] The purpose of this invention is to provide a food processing machine in which the rotor shaft of a brushless motor directly drives the pulverizing blade to rotate, thereby solving the problems of unstable transmission, unsatisfactory pulverizing effect, and high transmission and vibration noise and low heat dissipation efficiency of the power pulverizing system.

[0007] To address the aforementioned technical problems, this invention provides a variable frequency direct drive food processor, comprising a cup assembly including a cup body with a processing cavity, a cup lid covering the upper port of the cup body, a pulverizing blade disposed within the processing cavity, and a cup holder disposed at the lower part of the cup body. The cup holder contains a heating plate and a brushless motor. The brushless motor includes a stator assembly and a rotor assembly, the rotor assembly including a rotor shaft, the rotor shaft directly driving the pulverizing blade to rotate. The main unit includes a housing and an intelligent power drive module fixedly disposed within the housing, the intelligent power drive module being used to drive the brushless motor. A coupler is also included, comprising a coupler disposed within the cup body assembly. The coupler includes a male terminal and a female terminal located on the host. The brushless motor is detachably connected to the host along with the cup assembly, and the brushless motor is electrically connected to the intelligent power drive module through the coupler. The male terminal of the coupler includes U-phase, V-phase, and W-phase pins, which are electrically connected to the U-phase, V-phase, and W-phase output lines of the brushless motor, respectively. The female terminal of the coupler includes U-phase, V-phase, and W-phase terminals, one end of which is electrically connected to the U-phase, V-phase, and W-phase pins, respectively, and the other end is electrically connected to the U-phase, V-phase, and W-phase terminals on the intelligent power drive module, respectively. The number of pins on the male terminal of the coupler is N, where N≥7.

[0008] Furthermore, the male end of the coupler also includes a neutral wire PIN and a live wire PIN, which are electrically connected to the two terminals of the heating plate, respectively; the female end of the coupler also includes a neutral wire terminal and a live wire terminal, one end of which is electrically connected to the neutral wire PIN and the live wire PIN, respectively, and the other end is electrically connected to the neutral wire and the live wire terminals on the intelligent power drive module.

[0009] Furthermore, the male end of the coupler also includes a grounding pin, which is electrically connected to the grounding lead of the brushless motor; the female end of the coupler also includes a grounding terminal, one end of which is electrically connected to the grounding pin, and the other end of which is electrically connected to the grounding terminal of the intelligent power drive module.

[0010] Furthermore, the cup assembly also includes a safety switch triggered after the cup lid is installed in place. The male terminal of the coupler includes a cup lid safety protection PIN pin, which is electrically connected to one terminal of the safety switch, and the other terminal of the safety switch is electrically connected to the grounding PIN pin. The female terminal of the coupler includes a cup lid safety protection terminal, one end of which is electrically connected to the cup lid safety protection PIN pin, and the other end of which is electrically connected to the terminal of the intelligent power drive module.

[0011] Furthermore, the cup assembly also includes an NTC for detecting the temperature of the material inside the processing chamber. The male end of the coupler includes an NTC pin, one end of which is electrically connected to the NTC pin and the other end is electrically connected to the ground pin. The female end of the coupler includes an NTC terminal, one end of which is electrically connected to the NTC pin and the other end is electrically connected to the wiring terminal of the intelligent power drive module.

[0012] Furthermore, the cup assembly also includes a thermostat and a fuse. One end of the thermostat is electrically connected to the live wire pin, and the other end of the thermostat is electrically connected to one terminal of the heating plate. One end of the fuse is electrically connected to the other terminal of the heating plate, and the other end of the fuse is electrically connected to the neutral wire pin.

[0013] Furthermore, the cup assembly also includes an anti-overflow device. The male end of the coupler includes an anti-overflow pin, which is electrically connected to the wiring terminal of the anti-overflow device. The female end of the coupler includes an anti-overflow terminal, one end of which is electrically connected to the anti-overflow pin, and the other end of which is electrically connected to the wiring terminal of the brushless motor power drive module.

[0014] Furthermore, the cup assembly includes an anti-overflow device, the terminal of which is electrically connected to the safety protection pin of the cup lid.

[0015] Furthermore, the cup assembly includes a safety switch triggered after the cup lid is installed in place and an NTC for detecting the temperature of the material inside the processing chamber. The male terminal of the coupler includes a cup lid safety protection pin and an NTC pin. The safety switch and the NTC are connected in series between the cup lid safety protection pin and the grounding pin.

[0016] Furthermore, the other end of the cup lid safety protection terminal or the other end of the NTC terminal is electrically connected to the wiring input terminal of the host control board, and is electrically connected to the wiring terminal of the intelligent power drive module through the wiring output terminal of the host control board.

[0017] The beneficial effects of this invention are:

[0018] The food processor includes a cup assembly and a main unit. The cup holder of the cup assembly houses a heating plate and a brushless motor. The brushless motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft, which directly drives the pulverizing blades to rotate, thus achieving variable frequency direct drive of the pulverizing blades. This completely avoids connector transmission jamming and noise from the source of the variable frequency direct drive. The main unit includes a housing and an intelligent power drive module fixedly installed within the housing. The brushless motor is located within the cup holder and is electrically connected to the intelligent power drive module via a coupler, allowing for spatial isolation between the brushless motor and the intelligent power drive module. The brushless motor is a detachable component that can be disassembled and installed along with the cup assembly. Its small size and light weight not only facilitate the lightweight placement and removal of the cup assembly but also significantly shorten the length of the brushless motor rotor shaft, reducing the number of connector components and lowering transmission costs and noise. Furthermore, the increased space utilization of the main unit greatly improves the heat dissipation efficiency of the intelligent power drive module driving the brushless motor and reduces the overall energy efficiency of the food processor.

[0019] In the field of food processing machines, brushless motor platforms do not spatially separate the brushless motor and its control system. Those skilled in the art have no incentive to spatially separate the brushless motor body and the intelligent power drive module that drives it. Therefore, there is no scheme to connect the brushless motor to the intelligent power drive module via a coupler. However, the brushless motor in this application is detachably connected to the main unit along with the cup assembly. The brushless motor is electrically connected to the intelligent power drive module via the coupler, connecting the three-phase high-voltage power of the brushless motor to the intelligent power drive module within the main unit. This spatially separates the brushless power system and control system, significantly optimizing the transmission stability and reliability of the brushless platform in the food processing machine, as well as the reliability of the pulverizer blade switching and the lifespan of the transmission system. Furthermore, it saves coupler pins while meeting the requirements for hot beverage preparation, enabling reliable coupling between the brushless motor and the intelligent power drive module to transmit high-frequency high-voltage signals with no more than 7 pins. Simultaneously, it fully ensures the safety, hygiene, and stability of the food processing machine for the user. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the food processing machine described in this invention.

[0022] Figure 2This is an exploded view of the cup assembly of the food processing machine described in this invention.

[0023] Figure 3 This is a schematic diagram of the structure of the cup holder and the male end of the coupler in the food processing machine described in this invention.

[0024] Figure 4 This is a schematic diagram of the heating plate structure of the food processing machine described in this invention.

[0025] Figure 5 This is an electrical connection diagram of the food processing machine described in this invention.

[0026] Figure 6 This is a schematic diagram of the coupler connection of the food processing machine described in this invention.

[0027] Figure 7 This is another schematic diagram of the coupler connection of the food processing machine described in this invention.

[0028] Figure 8 This is a schematic diagram showing the connection of the coupler, intelligent power drive module, and control board of the food processing machine described in this invention.

[0029] Figure 9 This is another electrical connection diagram of the food processing machine described in this invention.

[0030] Figure 10 This is another schematic diagram of the coupler connection of the food processing machine described in this invention.

[0031] Figure 11 This is another schematic diagram of the coupler connection of the food processing machine described in this invention.

[0032] Figure 12 This is an exploded view of the main unit of the food processing machine described in this invention.

[0033] Figure 13 This is a schematic diagram of the cup assembly structure of the food processing machine described in this invention.

[0034] Figure 14 for Figure 13 Enlarged view of a portion of point A in the middle.

[0035] Figure 15 This is a cross-sectional view of the main unit of the food processing machine described in this invention.

[0036] Figure 16 This is a schematic diagram of the heat dissipation air duct of the food processing machine described in this invention.

[0037] The components shown in the diagram are named as follows: 100. Cup body assembly; 101. Cup body; 102. Cup lid; 103. Crusher; 104. Cup base; 105. Heating plate; 106. Brushless motor; 107. Stator assembly; 108. Rotor assembly; 109. Motor housing; 110. NTC; 111. Fuse; 112. Thermostat; 113. Anti-overflow device; 114. Cup base housing; 115. Heat dissipation outer cavity; 116. Heat dissipation inner cavity; 117. Cup base; 118. Heating plate seal; 119. Lateral seal; 120. Radial seal; 121. Edge surround; 122. Safety switch;

[0038] 200. Main unit; 201. Housing; 202. Intelligent power drive module; 203. IGBT module; 204. Control board; 205. Main unit air inlet; 206. Isolation gap; 207. Receiving cavity;

[0039] 300. Coupler; 301. Coupler male terminal; 302. Coupler female terminal; 303. U-phase pin; 304. V-phase pin; 305. W-phase pin; 306. Neutral pin; 307. Live pin; 308. Ground pin; 309. Cup lid safety protection pin; 310. NTC pin; 311. Anti-overflow pin. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 16As shown, the present invention provides a variable frequency direct drive food processor, including a cup body assembly 100 and a main unit 200. The cup body assembly 100 includes a cup body 101 with a processing cavity, a cup lid 102 covering the upper port of the cup body, a pulverizing blade 103 disposed in the processing cavity, and a cup seat disposed at the lower part of the cup body. The cup seat is provided with a heating plate 105 and a brushless motor 106. The brushless motor 106 includes a stator assembly 107 and a rotor assembly 108. The rotor assembly includes a rotor shaft, which directly drives the pulverizing blade 103 to rotate. Preferably, the pulverizing blade 103 is riveted to the end of the rotor shaft so that the brushless motor can directly drive the pulverizing blade 103 to rotate forward and reverse. As an optional optimization, the cup assembly 100 also includes a safety switch 122 triggered after the cup lid is installed in place. The safety switch 122 is used for safety detection of whether the cup lid is properly installed. When the cup lid is installed in place, it triggers the safety switch to conduct and output an electrical signal, allowing the food processor to execute its program normally. When the cup lid is not installed or is not properly installed, the safety switch cannot be triggered, and the food processor cannot run its program normally, preventing mechanical injury to the user caused by the rotation of the pulverizing blade 103 without the cup lid installed. Furthermore, the safety switch can transmit the electrical signal to the host machine either through the pins of the coupler 300 or through a linkage structure, triggering the conversion into an electrical signal within the host machine. This arrangement eliminates the need for a coupler to transmit the electrical signal, saving on the structure and number of coupler pins.

[0042] The host 200 includes a housing 201 and an intelligent power drive module 202 fixedly disposed within the housing. The intelligent power drive module 202 is used to drive the brushless motor. The intelligent power drive module 202 includes a base, an IGBT module 203 disposed on the base, an EMI module, an MCU module, a heating control module, and a rectifier module. The intelligent power drive module 202 is used to drive the operation of the three-phase brushless motor. The food processing machine includes a coupler 300, which includes a male end 301 disposed on the cup assembly and a female end 302 disposed on the main unit. The brushless motor is detachably connected to the main unit along with the cup assembly 100. The brushless motor is electrically connected to the intelligent power drive module 202 via the coupler, allowing the brushless motor and the intelligent power drive module 202 to be spatially isolated. The brushless motor, as a detachable component, can be detachably installed along with the cup assembly 100. The small size and light weight of the brushless motor not only facilitate the lightweight handling of the cup assembly 100 but also significantly shorten the rotor shaft length of the brushless motor, reducing the number of connecting head components and lowering transmission costs and noise. Furthermore, the increased space utilization of the main unit greatly improves the heat dissipation efficiency of the intelligent power drive module 202 driving the brushless motor and reduces the overall energy consumption of the food processing machine. Specifically, the IGBT module 203 includes an IPM chip. Compared to the simplified control mode of a series-wound motor, a brushless motor requires a separate intelligent power drive module 202 to drive it. The high-frequency operation of the brushless motor's U / V / W three-phase operation causes a rapid increase in the temperature of the IGBT module 203. Therefore, if the maximum slurry capacity of the food processor cup is greater than 1.5L, it is preferable to provide heat dissipation for the IGBT module 203 to ensure its normal and efficient operation, thereby ensuring the stability of the brushless motor. However, if the maximum slurry capacity of the cup is less than 1.5L, the IGBT module 203 may not have an independent cooling duct or fan, allowing the mounting cavity inside the main unit to form a natural heat dissipation space for the IGBT module 203.

[0043] In the field of food processing machines, spatially separating the brushless motor and its control system—specifically, placing the brushless motor in the cup holder 104 and the intelligent power drive module 202 in the main unit—not only satisfies the high-efficiency, low-noise transmission requirement of the brushless motor rotor shaft directly driving the pulverizing blade 103, but also provides efficient heat dissipation space for the intelligent power drive module 202 and expandable heat dissipation paths for different food processing machine platforms. Furthermore, it enhances the interchangeability of the cup assembly 100, thereby increasing the standardization rate and design standardization of the entire brushless motor platform, minimizing design costs and manufacturing anomalies. Those skilled in the art have no incentive to spatially separate the brushless motor body and the intelligent power drive module 202 used to drive the brushless motor; therefore, there is no specific scheme for connecting the brushless motor to the intelligent power drive module 202 via a coupler. The brushless motor of this application is detachably connected to the host along with the cup assembly 100. The brushless motor is electrically connected to the intelligent power drive module 202 through the coupler. The three-phase high-voltage power of the brushless motor is connected to the intelligent power drive module 202 in the host through the coupler, thus spatially separating the brushless power system and the control system. This greatly optimizes the transmission stability and reliability of the brushless platform of the food processor, as well as the reliability of the pulverizing blade 103's steering switching and the lifespan of the transmission system. Preferably, the cup assembly 100 also includes an NTC 110 for detecting the temperature of the material in the processing chamber. The NTC can measure the temperature of the material in the cup indirectly by being in close contact with the heating plate 105, or it can measure the temperature of the material in the cup directly by extending into the cup.

[0044] In a preferred embodiment, where the brushless motor is located within the cup body assembly 100 and the intelligent power drive module 202 is located in the host unit, the coupler is preferably a 7-pin coupler. Specifically, the male terminal 301 of the coupler includes:

[0045] The U-phase PIN 303, V-phase PIN 304, and W-phase PIN 305 are electrically connected to the U-phase, V-phase, and W-phase output lines of the brushless motor, respectively.

[0046] The grounding pin 308 is electrically connected to the grounding lead of the brushless motor.

[0047] The neutral pin 306 and the live pin 307 are electrically connected to the two terminals of the heating plate 105, respectively.

[0048] NTC pin 310, one end of the NTC is electrically connected to the NTC pin, and the other end is electrically connected to the ground pin.

[0049] The coupler female terminal 302 includes:

[0050] The U-phase, V-phase, and W-phase terminals are each electrically connected at one end to the U-phase, V-phase, and W-phase pins, respectively, and at the other end to the U-phase, V-phase, and W-phase terminals on the intelligent power drive module 202, respectively.

[0051] The grounding terminal has one end electrically connected to the grounding PIN pin and the other end electrically connected to the grounding terminal of the intelligent power drive module 202.

[0052] The neutral wire terminal and the live wire terminal are electrically connected at one end to the neutral wire PIN and the live wire PIN respectively, and at the other end to the neutral wire and live wire terminals on the intelligent power drive module 202.

[0053] The NTC terminal has one end electrically connected to the NTC terminal PIN and the other end electrically connected to the wiring terminal of the intelligent power drive module 202.

[0054] The cup assembly 100 further includes a thermostat 112 and a fuse 111. Preferably, the thermostat 112 and the fuse 111 are disposed at the bottom of the heating plate 105, and the thermostat 112 and the fuse 111 are connected in series with the heating plate 105 between the live wire pin and the neutral wire pin. Specifically, the heating plate 105 is provided with a thermostat 112 and a fuse 111, and a heat dissipation cavity 116 is formed between the heating plate 105 and the lower housing of the motor. The thermostat 112 and the fuse 111 are disposed in the heat dissipation cavity 116 and are located above the rotor assembly 108 and the stator assembly 107, which compresses space and maintains the temperature rise of the brushless motor stable without being affected by the heating plate 105. One end of the thermostat 112 is electrically connected to the live wire pin, and the other end is electrically connected to one terminal of the heating plate 105. One end of the fuse 111 is electrically connected to the other terminal of the heating plate 105, and the other end is electrically connected to the neutral wire pin. A 7-pin coupler is used, and the brushless motor and intelligent power drive module 202 are electrically connected by minimizing the number of pins, ensuring stable and reliable connection and operation of the brushless motor. The cup lid can be configured to trigger a switch inside the host via a structural linkage trigger device to generate an electrical signal for safety detection of whether the cup lid is in place, or the cup lid detection can be omitted until the cup structure meets safety requirements.

[0055] As another preferred implementation, such as Figures 3 to 8 As shown, a brushless motor is installed within the cup body assembly 100, and the intelligent power drive module 202 is installed within the main unit. The coupler is preferably an 8-pin coupler. The safety switch can be a micro switch, a magnetic switch, or something similar. Figure 7 The DS switch shown. Specifically, the coupler male terminal 301 includes:

[0056] The U-phase, V-phase, and W-phase pins are electrically connected to the U-phase, V-phase, and W-phase output lines of the brushless motor, respectively.

[0057] The grounding pin 308 is electrically connected to the grounding lead of the brushless motor.

[0058] The neutral pin 306 and the live pin 307 are electrically connected to the two terminals of the heating plate 105, respectively.

[0059] NTC pin 310, one end of the NTC is electrically connected to the NTC pin, and the other end is electrically connected to the ground pin.

[0060] The cup lid safety protection PIN pin 309 is electrically connected to one terminal of the safety switch, and the other terminal of the safety switch is electrically connected to the grounding PIN pin.

[0061] The coupler female terminal 302 includes:

[0062] The U-phase, V-phase, and W-phase terminals are each electrically connected at one end to the U-phase, V-phase, and W-phase pins, respectively, and at the other end to the U-phase, V-phase, and W-phase terminals on the intelligent power drive module 202, respectively.

[0063] The grounding terminal has one end electrically connected to the grounding PIN pin and the other end electrically connected to the grounding terminal of the intelligent power drive module 202.

[0064] The neutral wire terminal and the live wire terminal are electrically connected at one end to the neutral wire PIN and the live wire PIN respectively, and at the other end to the neutral wire and live wire terminals on the intelligent power drive module 202.

[0065] The NTC terminal has one end electrically connected to the NTC terminal PIN and the other end electrically connected to the wiring terminal of the intelligent power drive module 202.

[0066] The cup lid safety protection terminal has one end electrically connected to the cup lid safety protection PIN pin and the other end electrically connected to the wiring terminal of the intelligent power drive module 202.

[0067] The cup assembly 100 also includes a thermostat 112 and a fuse 111. Preferably, the thermostat 112 and the fuse 111 are disposed at the bottom of the heating plate 105, and the thermostat 112 and the fuse 111 are connected in series with the heating plate 105 between the live wire PIN and the neutral wire PIN.

[0068] As another preferred implementation, such as Figure 11As shown, the cup assembly 100 includes an anti-overflow device 113 for anti-overflow detection, based on a brushless motor disposed within the cup assembly 100, and an intelligent power drive module 202 disposed within the main unit. The coupler is preferably an 8-pin coupler. Specifically, the male terminal 301 of the coupler includes:

[0069] The U-phase, V-phase, and W-phase pins are electrically connected to the U-phase, V-phase, and W-phase output lines of the brushless motor, respectively.

[0070] The grounding pin is electrically connected to the grounding lead of the brushless motor.

[0071] The neutral pin and the live pin are electrically connected to the two terminals of the heating plate 105, respectively.

[0072] The NTC pin has one end electrically connected to the NTC pin and the other end electrically connected to the ground pin.

[0073] The anti-overflow pin 311 is electrically connected to the terminal of the anti-overflow device 113;

[0074] The coupler female terminal 302 includes:

[0075] The U-phase, V-phase, and W-phase terminals are each electrically connected at one end to the U-phase, V-phase, and W-phase pins, respectively, and at the other end to the U-phase, V-phase, and W-phase terminals on the intelligent power drive module 202, respectively.

[0076] The grounding terminal has one end electrically connected to the grounding PIN pin and the other end electrically connected to the grounding terminal of the intelligent power drive module 202.

[0077] The neutral wire terminal and the live wire terminal are electrically connected at one end to the neutral wire PIN and the live wire PIN respectively, and at the other end to the neutral wire and live wire terminals on the intelligent power drive module 202.

[0078] The NTC terminal has one end electrically connected to the NTC terminal PIN and the other end electrically connected to the wiring terminal of the intelligent power drive module 202.

[0079] The anti-overflow terminal has one end electrically connected to the anti-overflow PIN pin and the other end electrically connected to the wiring terminal of the brushless motor power drive module.

[0080] The cup assembly 100 further includes a thermostat 112 and a fuse 111. Preferably, the thermostat 112 and the fuse 111 are disposed at the bottom of the heating plate 105, and the thermostat 112 and the fuse 111 are connected in series with the heating plate 105 between the live wire pin and the neutral wire pin. The anti-overflow device 113 may specifically be an anti-overflow electrode rod or an anti-overflow electrode sheet or a capacitive anti-overflow component or other devices with slurry height measurement and signal transmission capabilities.

[0081] As another preferred implementation, such as Figure 9 and Figure 10 As shown, a brushless motor is installed within the cup body assembly 100, and the intelligent power drive module 202 is installed within the main unit. The coupler is preferably an 8-pin coupler, and the transmission of the cup lid safety detection signal and the NTC detection signal is achieved through pin reuse. Specifically, the cup body assembly 100 includes an anti-overflow device 113 and a safety switch triggered after the cup lid is installed in place. The terminals of the anti-overflow device 113 are electrically connected to the cup lid safety protection pin, effectively reusing the anti-overflow pin with the cup lid safety protection pin.

[0082] As another preferred implementation, such as Figure 11 As shown, the coupler is preferably an 8-pin coupler. The cup assembly 100 also includes an anti-overflow device 113. The male terminal 301 of the coupler includes an anti-overflow pin, which is electrically connected to the terminal of the anti-overflow device 113. The female terminal 302 of the coupler includes an anti-overflow terminal, one end of which is electrically connected to the anti-overflow pin, and the other end of which is electrically connected to the terminal of the brushless motor power drive module. The cup assembly 100 includes a safety switch triggered after the cup lid is installed in place and an NTC for detecting the temperature of the material in the processing chamber. The male terminal 301 of the coupler includes a cup lid safety protection pin and an NTC pin. The safety switch and the NTC are connected in series between the cup lid safety protection pin and the grounding pin.

[0083] like Figure 8 As shown, the other end of the cup lid safety protection terminal or the other end of the NTC terminal is electrically connected to the wiring input terminal of the host control board 204, and is electrically connected to the wiring terminal of the intelligent power drive module 202 through the wiring output terminal of the host control board 204.

[0084] In existing food processors with detachable cups and main units, a coupler is typically used to electrically connect the heating plate 105 to the control board 204 inside the main unit for signal transmission. Patent application CN202121196456.1 discloses a three-in-one multi-functional machine that uses a PIN coupler to allow for the interchangeable use of different cookware. However, in the field of food processors, there is no solution for spatially separating the brushless motor and the intelligent power drive module 202 that drives the brushless motor. Based on the inherent stability of the brushless motor, those skilled in the art have no incentive to separate the brushless motor and the intelligent power drive module 202.

[0085] Specifically, the brushless motor is positioned above the coupler, and the brushless motor intelligent power module is positioned below the coupler. This spatially separates the brushless motor and the intelligent power drive module 202 while maintaining electrical connection. This arrangement allows for a smaller cup size and a smaller outer diameter of the cup holder 104, effectively limiting the minimum outer diameter of the cup to that of the brushless motor. This makes it easier and less strenuous for users to place and remove the cup. Furthermore, the intelligent power drive module 202, positioned below the coupler, utilizes the internal space and heat dissipation of the main unit, resulting in more reliable and stable control of the brushless motor. Preferably, the intelligent power drive module 202 includes a base and an IGBT module 203 mounted on the base. The projection of the base onto the horizontal plane overlaps the projection of the coupler onto the horizontal plane. Furthermore, the base is horizontally arranged to minimize the height of the main unit. The flattening of the brushless motor itself reduces the height of the cup holder 104, while the horizontally arranged intelligent power drive module 202 further reduces the height of the main unit, thereby greatly reducing the overall height of the food processing machine. The stability and reliability of the power transmission system are greatly improved.

[0086] As a preferred option, such as Figure 16As shown, the main unit housing has a main unit air inlet 205. The cooling medium flows through the main unit air inlet 205, through the IGBT module 203, and then rises upwards through the heat dissipation outer cavity 115 and the heat dissipation inner cavity 116, flowing through the stator assembly and the rotor assembly. This allows the heat dissipation airflow of the IGBT module 203 and the motor to be longitudinally connected across the cup holder space and the base space, so as to utilize the fan of the brushless motor to efficiently dissipate heat from the IGBT module 203. The structure of the cup assembly 100 is further optimized. The cup holder also includes a cup holder housing 114, and the brushless motor also includes a motor housing 109. The motor housing 109 forms a heat dissipation inner cavity 116 between the rotor assembly and the stator assembly. The cup holder housing 114 covers the periphery of the brushless motor, so as to form a heat dissipation outer cavity 115 between the cup holder housing 114 and the motor housing 109. The heat dissipation outer cavity 115 and the heat dissipation inner cavity 116 are connected. The cup holder includes a cup base 117, the heating plate 105 is sealed and clamped between the lower port of the cup body and the cup base 117, and the male end 301 of the coupler is fixedly disposed on the cup base 117. Figure 2 , Figure 13 and Figure 14 As shown, the cup holder also includes a heating plate seal 118, which includes an integral lateral sealing part 119 and a radial sealing part 120. The lateral sealing part 119 is sandwiched and sealed between the inner side wall of the lower port of the cup body and the outer side wall of the heating plate 105. The radial sealing part 120 covers the radially outward extending perimeter 121 of the bottom of the heating plate 105, thereby ensuring reliable sealing even in situations with limited radial space, and is particularly suitable for the assembly and sealing of small-capacity cup body components 100. The male end 301 of the coupler and the cup holder housing 114 are connected to the cup base 117 by screws to fix the male end 301 of the coupler below the brushless motor, so that the brushless motor and the coupler partially or completely overlap in the horizontal projection plane, thereby greatly saving the outer diameter of the cup body component 100, especially the outer diameter of the cup holder.

[0087] As a preferred option, such as Figure 15 and Figure 16As shown, the main unit has an open receiving cavity 207 for accommodating the cup holder. An isolation gap 206 is formed between the inner wall of the receiving cavity and the outer wall of the cup holder. The isolation gap 206 surrounds the brushless motor, thereby creating a double isolation between the brushless motor, which is detachably installed with the cup holder, and the user. A first isolation gap 206 is formed between the brushless motor and the cup holder, and a second isolation gap 206 is formed between the cup holder and the inner wall of the receiving cavity. Furthermore, a third isolation gap 206 can be formed between the side wall of the receiving cavity and the outer wall of the cup holder. The multiple isolation gaps 206 can better block noise and vibration, and at the same time, can reduce the crushing and vibration noise of the crushing blade 103 within the multiple isolation gaps 206, thus optimizing the sound quality of the variable frequency direct drive food processor.

[0088] Understandably, the main unit does not have a cavity to accommodate the cup holder. Instead, it has an installation platform, which includes a positioning boss. The bottom of the cup holder has a positioning groove that mates with the positioning boss. Both the positioning boss and the positioning groove are located below the brushless motor, allowing for detachable installation of the cup holder from the main unit. This further reduces the outer diameter of the main unit, achieving miniaturization of the small-capacity food processor and lightweighting of the cup. The positioning boss can be a continuous arc-shaped boss or circumferentially distributed protrusions.

[0089] Understandably, the male end 301 of the coupler can also be located on the outside of the motor, which means that the male end 301 of the coupler partially or completely overlaps with the brushless motor in the vertical projection plane. This makes full use of the height space of the cup holder, making the cup holder flat, reducing the height of the cup body assembly 100, and making the center of gravity of the brushless motor closer to the center of gravity of the pulverizer 103. The rotor shaft length and the height of the main unit are also reduced accordingly, which is more conducive to optimizing the sound quality of the transmission system of the food processing machine and improving the operational stability.

[0090] Understandably, the intelligent power drive module 202 includes a substrate and an IGBT module 203 disposed on the substrate. The substrate can also be longitudinally disposed within the host housing. A control board 204 is also disposed within the host housing, the control board 204 being longitudinally disposed. A fixing bracket is also disposed within the host housing, and the control board 204 and the substrate are respectively fixed to both sides of the fixing bracket.

[0091] Understandably, the coupler can also be configured as a split type, with the male end 301 of the coupler including a split first male end 301 and a second male end 301. Both the first male end 301 and the second male end 301 are provided with 4 pins, and the female end 302 of the coupler is provided in a one-to-one correspondence, thereby further optimizing the coupling space in the cup holder, so that the structural connection and electrical connection between the coupler and the brushless motor and the intelligent power drive module 202 are more space-efficient and efficient.

[0092] In addition to the preferred embodiments described above, the technical solutions protected by this invention are not limited to the above embodiments. It should be noted that the combination of multiple technical solutions in any one embodiment, as well as the combination of technical solutions in any one embodiment with technical solutions in one or more other embodiments, are within the scope of protection of this invention. Although the invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this invention are within the scope of protection claimed by this invention.

Claims

1. A variable frequency direct drive food processing machine, characterized in that, include: The cup assembly includes a cup body with a processing chamber, a cup lid that fits onto the upper port of the cup body, a pulverizing blade disposed in the processing chamber, and a cup seat disposed at the lower part of the cup body. The cup seat is provided with a heating plate and a brushless motor. The brushless motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft, and the rotor shaft directly drives the pulverizing blade to rotate. The main unit includes a housing and an intelligent power drive module fixedly disposed within the housing, the intelligent power drive module being used to drive the brushless motor; The coupler includes a male coupler terminal disposed on the cup body assembly and a female coupler terminal disposed on the host. The brushless motor is detachably connected to the host along with the cup body assembly, and the brushless motor is electrically connected to the intelligent power drive module through the coupler; The male terminal of the coupler includes: U-phase, V-phase and W-phase PIN pins, which are electrically connected to the U-phase, V-phase and W-phase output lines of the brushless motor, respectively; The female end of the coupler includes: U-phase, V-phase and W-phase terminals, one end of which is electrically connected to the U-phase, V-phase and W-phase PIN pins respectively, and the other end is electrically connected to the U-phase, V-phase and W-phase wiring terminals on the intelligent power drive module respectively. The number of pins on the male end of the coupler is N, where N≥7.

2. The food processing machine according to claim 1, characterized in that, The male terminal of the coupler also includes a neutral wire PIN and a live wire PIN, which are electrically connected to the two terminals of the heating plate, respectively. The female end of the coupler also includes a neutral terminal and a live terminal, one end of which is electrically connected to the neutral pin and the live pin respectively, and the other end is electrically connected to the neutral and live terminals on the intelligent power drive module.

3. The food processing machine according to claim 1, characterized in that, The male terminal of the coupler also includes a grounding pin, which is electrically connected to the grounding lead of the brushless motor. The female end of the coupler also includes a grounding terminal, one end of which is electrically connected to the grounding terminal PIN pin, and the other end of which is electrically connected to the grounding terminal of the intelligent power drive module.

4. The food processing machine according to claim 3, characterized in that, The cup body assembly also includes a safety switch triggered after the cup lid is installed in place. The male terminal of the coupler includes: a cup lid safety protection PIN pin, which is electrically connected to one terminal of the safety switch, and the other terminal of the safety switch is electrically connected to the grounding PIN pin. The female end of the coupler includes: a cup lid safety protection terminal, one end of which is electrically connected to the cup lid safety protection PIN pin, and the other end of which is electrically connected to the wiring terminal of the intelligent power drive module.

5. The food processing machine according to claim 3, characterized in that, The cup assembly also includes an NTC for detecting the temperature of the material inside the processing chamber. The male terminal of the coupler includes an NTC pin. One end of the NTC is electrically connected to the NTC pin, and the other end is electrically connected to the ground pin. The female end of the coupler includes an NTC terminal, one end of which is electrically connected to the NTC terminal PIN pin, and the other end of which is electrically connected to the wiring terminal of the intelligent power drive module.

6. The food processing machine according to claim 2, characterized in that, The cup assembly also includes a thermostat and a fuse. One end of the thermostat is electrically connected to the live wire pin, and the other end of the thermostat is electrically connected to one terminal of the heating plate. One end of the fuse is electrically connected to the other terminal of the heating plate, and the other end of the fuse is electrically connected to the neutral wire pin.

7. The food processing machine according to claim 3, characterized in that, The cup assembly also includes an anti-overflow device. The male end of the coupler includes an anti-overflow pin, which is electrically connected to the wiring terminal of the anti-overflow device. The female end of the coupler includes an anti-overflow terminal, one end of which is electrically connected to the anti-overflow pin, and the other end of which is electrically connected to the wiring terminal of the brushless motor power drive module.

8. The food processing machine according to claim 4, characterized in that, The cup body assembly includes an anti-overflow device, the terminal of which is electrically connected to the safety protection pin of the cup lid.

9. The food processing machine according to claim 8, characterized in that, The cup assembly includes a safety switch triggered after the cup lid is installed in place and an NTC for detecting the temperature of the material in the processing chamber. The male terminal of the coupler includes a cup lid safety protection pin and an NTC pin. The safety switch and the NTC are connected in series between the cup lid safety protection pin and the grounding pin.

10. The food processing machine according to claim 4 or 5, characterized in that, The other end of the cup lid safety protection terminal or the other end of the NTC terminal is electrically connected to the wiring input terminal of the host control board, and is electrically connected to the wiring terminal of the intelligent power drive module through the wiring output terminal of the host control board.

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