Variable frequency direct drive light sound food processor

Abstract

The utility model provides a kind of light sound food processing machine of frequency conversion direct drive, comprising: cup body component, including cup body, cup cover, comminuting knife and cup stand, the cup stand is equipped with heating disc and brushless motor, the brushless motor includes stator assembly and rotor assembly, rotor assembly includes rotor shaft, the rotor shaft directly drives the comminuting knife rotation;Host computer, including shell and the intelligent power drive module of fixedly arranged in shell, the intelligent power drive module is used to drive the brushless motor;Coupler includes coupler male end, and coupler female end;The brushless motor is detachable with host computer along with the cup body component, and brushless motor is electrically connected with intelligent power drive module by the coupler, to make brushless motor and intelligent power drive module spatially isolated arrangement, the coupler is set to split type, and coupler male end includes split type's first coupler male end and second coupler male end, to fully intensive optimization cup stand and host computer space.

Description

Technical Field

[0001] This utility model belongs to the field of food processing machines, and in particular 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 direction, causing the connector to revert accordingly. The torque required to overcome this reversal leads to significant wear and tear on the connector. While those skilled in the art typically leverage the inherent stability and transmission stability of the brushless motor itself to offset the connector's reliability and noise problems, further improvements to the brushless motor power platform in food processors—such as enhanced transmission stability, compact installation space for the intelligent power drive module and brushless motor, improved safety and connection reliability, better heat dissipation and energy efficiency, and improved pulverizing performance—remain urgent challenges. Utility Model Content

[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 for processing. This solves the problem that the brushless motor and the intelligent power drive module used to drive the brushless motor occupy a large space and can only be accommodated in the main unit of the food processing machine. As a result, the power pulverizing system of the food processing machine is unstable, the heat dissipation structure is complicated, and the three-phase brushless motor and the intelligent power drive module cannot be safely and reliably connected in the same small space.

[0007] To solve the above-mentioned technical problems, this utility model provides a variable frequency direct drive food processor, comprising: a cup body assembly, including a cup body with a processing cavity, a cup lid covering the upper port of the cup body, a pulverizing blade disposed in the processing cavity, and a cup seat disposed at the lower part of the cup body, wherein the cup seat is provided with a heating plate and a brushless motor, the brushless motor including a stator assembly and a rotor assembly, the rotor assembly including a rotor shaft, the rotor shaft directly driving the pulverizing blade to rotate; a main unit, including a housing and an intelligent power drive module fixedly disposed in the housing, the intelligent power drive module being used to drive the brushless motor; a coupler, including a coupler male terminal disposed on the cup body assembly and a coupler female terminal disposed on the main unit; the brushless motor is detachably connected to the main unit along with the cup body assembly, and the brushless motor is electrically connected to the intelligent power drive module through the coupler, so that the brushless motor and the intelligent power drive module are spatially isolated; the coupler is configured as a split type, the coupler male terminal including a split first coupler male terminal and a split coupler male terminal.

[0008] Furthermore, the intelligent power drive module includes a substrate and an IGBT module disposed on the substrate, wherein the substrate is horizontally disposed.

[0009] Furthermore, the IGBT module does not have an independent heat dissipation duct, so that the mounting cavity inside the host forms a natural heat dissipation space for the IGBT module.

[0010] Furthermore, the IGBT module does not have an independent cooling fan, so that the mounting cavity inside the host forms a natural heat dissipation space for the IGBT module.

[0011] Furthermore, both the male terminals of the first and second couplers are equipped with 4-pin pins, and the female terminals of the couplers are configured accordingly.

[0012] Furthermore, the brushless motor is positioned above the coupler, and the brushless motor intelligent power drive module is positioned below the coupler.

[0013] Furthermore, the intelligent power drive module includes a base, an IGBT module, an EMI module, an MCU module, a heating control module, and a rectifier module disposed on the base. The intelligent power drive module is used to drive the operation of a three-phase brushless motor.

[0014] Furthermore, the cup holder includes a cup base, and the heating plate is sealed and clamped between the lower port of the cup body and the cup base.

[0015] Furthermore, the brushless motor includes U-phase, V-phase and W-phase output lines, and one of the coupler male terminals includes U-phase, V-phase and W-phase pins, and the U-phase, V-phase and W-phase output lines are electrically connected to the U-phase, V-phase and W-phase pins respectively.

[0016] The beneficial effects of this utility model are:

[0017] The food processing machine includes a cup body assembly and a main unit. The cup body assembly has a heating plate and a brushless motor inside the cup holder. The brushless motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft. The rotor shaft directly drives the pulverizing blade to rotate, thereby realizing the variable frequency direct drive of the pulverizing blade. By directly driving the pulverizing blade with variable frequency, the transmission jamming and noise of the connector are completely eliminated from the source. The main unit includes a housing and a smart power drive module fixedly installed within the housing. A brushless motor is housed within the cup holder. The brushless motor is electrically connected to the smart power drive module via a coupler, thus spatially isolating the brushless motor and the smart power drive module. This significantly improves the heat dissipation efficiency of the smart power drive module driving the brushless motor, potentially eliminating the need for additional heat dissipation channels within the main unit. Optionally, no additional motor heat dissipation channel is required within the cup holder. By spatially isolating the brushless motor and the smart power drive module, each with its own independent cup holder space for motor installation and independent internal space within the main unit for the smart power drive module, the installation spaces for the brushless motor and the smart power drive module are independent and do not interfere with each other. The smart power drive module is unaffected by the brushless motor itself or the cup body. The heat radiation from the hot-swept components significantly reduces the heat dissipation requirements of both the brushless motor and the intelligent power drive module, thus simplifying the internal space of the cup holder and the main unit. The coupler is designed as a split type, with separate first and second male coupler terminals. This reduces the independent space occupied by a single coupler, allowing for flexible positioning of the first and second male coupler terminals according to the cup holder's shape. This ensures a safe and reliable electrical connection between the brushless motor and the intelligent power drive module, which are located in separate cup holder and main unit spaces respectively. Furthermore, it further streamlines the space structure of the cup holder and main unit, making the split coupler occupy less space and further reducing the height and diameter of the cup holder. This makes lifting and assembling the cup assembly easier and more convenient. Moreover, the brushless motor, as a detachable component, can be disassembled and installed along with the cup assembly. Its small size and light weight not only facilitate the lightweight handling of the cup assembly but also significantly shorten the length of the brushless motor rotor shaft, reducing the number of connecting parts and lowering transmission costs and noise.

[0018] 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

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the overall structure of the food processing machine described in this utility model.

[0021] Figure 2 This is an exploded view of the cup assembly of the food processing machine described in this utility model.

[0022] 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 utility model.

[0023] Figure 4 This is a schematic diagram of the heating plate structure of the food processing machine described in this utility model.

[0024] Figure 5 This is an electrical connection diagram of the food processing machine described in this utility model.

[0025] Figure 6 This is a schematic diagram of the coupler connection of the food processing machine described in this utility model.

[0026] Figure 7 This is another connection diagram of the coupler of the food processing machine described in this utility model.

[0027] Figure 8This 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 utility model.

[0028] Figure 9 This is another electrical connection diagram of the food processing machine described in this utility model.

[0029] Figure 10 This is another connection diagram of the coupler of the food processing machine described in this utility model.

[0030] Figure 11 This is another connection diagram of the coupler of the food processing machine described in this utility model.

[0031] Figure 12 This is an exploded view of the main unit of the food processing machine described in this utility model.

[0032] Figure 13 This is a schematic diagram of the cup body assembly of the food processing machine described in this utility model.

[0033] Figure 14 for Figure 13 A magnified view of a portion of the middle cup assembly.

[0034] Figure 15 This is a cross-sectional view of the main unit of the food processing machine described in this utility model.

[0035] Figure 16 This is a schematic diagram of the heat dissipation air duct of the food processing machine described in this utility model.

[0036] 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;

[0037] 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;

[0038] 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

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1 to 16 As shown, this utility model 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.

[0041] 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 terminal 301 disposed on the cup assembly and a female terminal 302 disposed on the main unit. The female terminal includes a terminal corresponding to the pin of the male terminal. 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 through the coupler, so that the brushless motor and the intelligent power drive module 202 are spatially isolated. The brushless motor is a detachable component that can be detachably installed along with the cup assembly 100. The brushless motor is small in size and light in weight, which not only facilitates the lightweight handling of the cup assembly 100, but also greatly shortens the length of the brushless motor rotor shaft, reduces the number of connecting head components, and lowers transmission costs and transmission noise. Moreover, the space utilization of the main unit is improved, which greatly improves the heat dissipation efficiency of the intelligent power drive module 202 that drives 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 three-phase (U / V / W) causes a rapid increase in the temperature of the IGBT module 203. Therefore, if the maximum slurry-making 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-making capacity of the cup is no greater 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.

[0042] In the field of food processing machines, the brushless motor and the intelligent power drive module are spatially separated. Specifically, the brushless motor is placed in the cup holder 104, and the intelligent power drive module 202 is placed in the main unit. This not only meets the requirements of efficient and low-noise transmission of the brushless motor rotor shaft directly driving the crushing blade 103, but also provides efficient heat dissipation space for the intelligent power drive module 202 and heat dissipation solutions that can be expanded according to different models of food processing machine platforms. Furthermore, it improves the interchangeability of the cup assembly 100, thereby increasing the standardization rate and design planning of the entire brushless motor platform and minimizing design costs and manufacturing anomalies. In particular, the brushless motor is mounted in the cup holder 104, while the intelligent power drive module 202 is mounted in the main unit. This significantly improves the heat dissipation efficiency of the intelligent power drive module that drives the brushless motor. Optionally, it eliminates the need for additional heat dissipation channels within the main unit, and vice versa. By spatially isolating the brushless motor and the intelligent power drive module, with separate cup holder spaces for motor installation and separate internal main unit spaces for the intelligent power drive module, the installation spaces for the brushless motor and the intelligent power drive module are independent and do not interfere with each other. This significantly reduces the heat dissipation requirements of the brushless motor itself and the intelligent power drive module. The heat dissipation requirements of the power module itself simplify the internal space structure of the cup holder and the main unit. The coupler is set as a split type, and the male end of the coupler includes a split first coupler male end and a split second coupler male end. This is equivalent to reducing the independent space occupied by a single coupler, so that the first coupler male end and the second coupler male end can be flexibly positioned according to the shape of the cup holder. This makes the electrical connection between the brushless motor and the intelligent power drive module, which are respectively set in the independent cup holder space and the main unit space, safe and reliable. At the same time, it further compresses the space structure of the cup holder and the main unit, so that the split coupler occupies less space, further reducing the height and diameter of the cup holder, and making it easier and more convenient to lift and disassemble the cup body assembly.

[0043] Those skilled in the art have no motivation to spatially separate the brushless motor body and the intelligent power drive module 202 used to drive the brushless motor, and therefore there is no specific scheme for connecting the brushless motor to the intelligent power drive module 202 via a coupler. In this application, the brushless motor 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 via the coupler, connecting the three-phase high-voltage power of the brushless motor to the intelligent power drive module 202 inside the host through the coupler. This spatially separates the brushless power system and the control system, thereby greatly optimizing the transmission stability and reliability of the brushless platform of the food processing machine, 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 inside the processing chamber. The NTC can measure the temperature of the material inside the cup indirectly by being in close contact with the heating plate 105, or it can directly measure the temperature of the material inside the cup by extending into the cup body.

[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 11 As 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 female terminal of the coupler includes a terminal corresponding to the pin of the male terminal of the coupler. Specifically, the female terminal 302 of the coupler 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 intelligent 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 10As 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 preferably uses 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 intelligent 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 16 As 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 frame space, so as to utilize the brushless motor fan 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. A heat dissipation inner cavity 116 is formed between the motor housing 109 and the rotor and stator assemblies. The cup holder housing 114 covers the brushless motor, forming 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 brushless motor has high heat dissipation efficiency, and the airflow velocity through the heat dissipation inner and outer cavities gradually decreases during heat dissipation to minimize the noise of the cup assembly. 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. The male end 301 of the coupler is fixedly disposed on the cup base 117. Figure 2 , Figure 13 and Figure 14As 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 16 As 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 coupler male terminal 301 including a split first coupler male terminal and a split second coupler male terminal. This further optimizes the coupling space within the cup holder, making the structural and electrical connections between the coupler and the brushless motor and intelligent power drive module more space-efficient and effective. Specifically, the brushless motor itself occupies most of the space inside the cup holder. The separate first and second male couplers, compared to a one-piece coupler, further reduce their volume and space occupation. Their placement on the outside of the brushless motor is also more flexible. The first and second male couplers are positioned at different locations on the cup holder, maximizing the use of the space between the cup holder housing and the brushless motor. This results in a smaller space occupation in the height or radial direction of the cup holder. This facilitates easy and effortless assembly and disassembly of the cup assembly and the main unit, as well as quick alignment, and ensures stable and reliable driving of the brushless motor by the intelligent power drive module. Furthermore, it significantly reduces the space occupied by the cup holder and the main unit, making it easier to store in the kitchen and fully utilizing the space resources inside the food processor and in the external storage environment. In addition, the separate male couplers also help reduce the noise from the resonance points of the cup holder during brushless motor operation, resulting in a more comfortable feel and lower vibration noise on the outer surface of the cup assembly when the food processor is working. Furthermore, the distance between the PIN pins on the male end of the first coupler and the PIN pins on the male end of the second coupler is spatially different compared to the PIN pins on the male end of the coupler that are integrated. Based on the different functions of the PIN pins, different distance positions can be combined and set, so that the split-type coupler can be more efficient, safer and more reliable in connection and operation, and has stronger functional adaptability to different models of food processing machines.

[0092] Understandably, given the split design of the male connector, it is preferable that the female connector is also split, with the female connector including a first female connector and a second female connector. The first male connector is plugged into the first female connector, and the second male connector is plugged into the second female connector.

[0093] Preferably, both the first and second male couplers 301 are provided with 4 pins, and the female couplers 302 are provided with corresponding pins. This arrangement can improve the utilization rate of each split coupler while conserving space and efficiency.

[0094] In addition to the preferred embodiments described above, the technical solutions protected by this utility model 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 protection scope of this utility model. Although this utility model 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 utility model are within the scope of protection claimed by this utility model.

Claims

1. A variable frequency direct drive low-noise 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 cup body assembly is detachably connected to the main unit. The brushless motor is located inside the cup body assembly, and the intelligent power drive module is located inside the main unit. The brushless motor is electrically connected to the intelligent power drive module through the coupler, so that the brushless motor and the intelligent power drive module are spatially isolated. The coupler is configured as a split type, and the male terminals of the coupler include a split first male terminal and a split second male terminal.

2. The food processing machine according to claim 1, characterized in that, The intelligent power drive module includes a substrate and an IGBT module disposed on the substrate, wherein the substrate is horizontally arranged.

3. The food processing machine according to claim 2, characterized in that, The IGBT module does not have an independent heat dissipation duct, so that the mounting cavity inside the host forms a natural heat dissipation space for the IGBT module.

4. The food processing machine according to claim 2, characterized in that, The IGBT module does not have an independent cooling fan, so that the mounting cavity inside the host forms a natural heat dissipation space for the IGBT module.

5. The food processing machine according to claim 1, characterized in that, Both the male terminals of the first and second couplers are equipped with 4-pin pins, and the female terminals of the couplers are configured accordingly.

6. The food processing machine according to claim 1, characterized in that, The brushless motor is positioned above the coupler, and the brushless motor intelligent power drive module is positioned below the coupler.

7. The food processing machine according to claim 2, characterized in that, The intelligent power drive module includes a base, an IGBT module, an EMI module, an MCU module, a heating control module, and a rectifier module disposed on the base. The intelligent power drive module is used to drive the operation of a three-phase brushless motor.

8. The food processing machine according to claim 1, characterized in that, The cup holder includes a cup base, and the heating plate is sealed and clamped between the lower port of the cup body and the cup base.

9. The food processing machine according to claim 1, characterized in that, The brushless motor includes U-phase, V-phase and W-phase output lines, and one of the coupler male terminals includes U-phase, V-phase and W-phase pins. The U-phase, V-phase and W-phase output lines are electrically connected to the U-phase, V-phase and W-phase pins, respectively.

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