Variable-frequency direct-drive food processor

Abstract

The utility model 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, and a heating disc and a brushless motor are arranged in the cup base. 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, and the brushless motor is electrically connected with the intelligent power driving module through the coupler, so that the brushless motor is integrally arranged on the cup body assembly.

Description

Technical Field

[0001] The utility model belongs to the field of food processing machines, in particular to a food processing machine in which a grinding knife is directly connected to and driven to rotate by a rotor shaft of a variable frequency motor. Background Art

[0002] Existing food processors typically consist of a main unit and a removable cup assembly. The main unit houses a series-wound motor with a lower connector attached to the motor's output shaft. The cup assembly includes the cup, a pulverizer, and a pulverizer shaft. An upper connector is located at the lower end of the pulverizer shaft. Power from the series-wound motor is transmitted to the pulverizer via a transmission between the lower and upper connectors. Because food processors use high-speed rotating pulverizers to process food, the removable, counter-rotating connection between the upper and lower connectors is prone to resonance and localized eccentricity at the connectors, compromising transmission stability and exacerbating transmission noise and vibration from the series-wound motor.

[0003] The prior art has optimized the transmission system of a food processor operating at high speeds. Patent application number CN201921599967.0 discloses a cooking cup with an improved motor mounting structure, comprising a cup body, a cup lid, a cup holder, an electric heating plate, a motor, and a knife assembly. The upper end of the cup holder is fixedly connected to the lower end of the cup body. The electric heating plate is disposed within the lower opening of the cup body, sealing the lower opening of the cup body. The motor is disposed within the cavity of the cup holder and below the electric heating plate. The motor's rotating shaft extends through an axial hole in the electric heating plate and into the cup body to connect to the knife assembly. Screws pass from bottom to top through through holes in the motor and screw into the bracket seat, suspending and fixing the motor to the electric heating plate, thereby forming an integrated structure of the motor and the electric heating plate. This arrangement allows the motor and the heating plate to be fixedly connected as one, eliminating the complex transmission structure in which the crushing blade and the motor shaft are connected via a connector, thereby reducing transmission noise. However, this solution still relies on a series-wound motor drive, especially when the motor is fixed to the cooking cup. As a power source, the series-wound motor itself is noisy and has a high motor temperature rise, which is further exacerbated by the heat radiated by the hot plate. Furthermore, the carbon brushes of the series-wound motor generate carbon dust that remains in the cup holder, potentially harmful to the user. Furthermore, the large vertical space occupied by the motor increases the height of the cup holder, significantly increasing the overall height of the cooking cup. This increased weight makes it difficult for users to remove and place the cooking cup from the main unit.

[0004] Based on the problem that the series-excited motor is set in the cup holder, resulting in excessive motor temperature rise and low heat dissipation efficiency, the patent with application number CN201920286880.1 discloses a wall-breaking food processor with an air inlet duct, including a base, a motor, a blade group, a fan, an operation panel, a main control panel and a cup body assembly, and the operation panel is set on the base; the cup body assembly includes a cup body, a cup cover assembly, a bottom plate with an electric heating element, a knife shaft seat and a cup seat arranged on the bottom plate, the lower end of the cup body, the bottom plate and the cup seat are detachably connected into one, and the motor is fixed on the motor seat. When in use, the fan rotates, and the indoor air enters the sleeve through the indoor air inlet on the base, the fan, the air inlet pipe, the air inlet on the bottom plate of the accommodating cavity, and the air inlet on the bottom plate of the sleeve on the air guide; then enters the annular ventilation duct formed by the sleeve and the support seat 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; enters the base through the air outlet holes on the air guide plate and the air outlet holes on the bottom plate of the accommodating cavity, and finally is discharged through the exhaust holes. This solution still uses the series-wound motor as the power source and optimizes the heat dissipation duct of the series-wound motor on this basis, so as 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-wound motor. The air duct structure is complex and still cannot overcome the noise problem, heat dissipation, and health and safety issues of the series-wound motor set in the cup holder.

[0005] In order to overcome the problems of large size of the series-wound motor of the food processor, high noise of the power source, high noise of the transmission system and the crushing system, and low heat dissipation efficiency from the source, the patents with application numbers CN202010958852.7 and CN202120355518.2 respectively disclose a flat food processor driven by a brushless motor, comprising a base and a mixing cup mounted on the base, the base comprising a casing, a motor and an air duct flowing through the motor, along the direction of air flow, the air duct comprising 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 channel and the air outlet channel, the air outlet channel being arranged around the side wall of the motor. Such a solution solves the problem of the large size of the series-wound motor making the overall height of the food processor too high, as well as the problem of commutation noise of the carbon brush of the series-wound motor and dust residue formed by carbon powder, eliminates the health and safety problems from the source, and optimizes the sound quality problem of the power system itself. However, due to concerns about the stability of the food processor's power system, this solution places the brushless motor and control system inside the main unit, transmitting power to the pulverizer via a connector. This still presents issues with power transmission stability and noise. In particular, when the brushless motor switches direction, the connector also reverses direction, overcoming the torque during the reversal process, which significantly reduces the connector's lifespan. Those skilled in the art typically use the inherently stable operation and transmission stability of the brushless motor to offset the connector's transmission reliability and noise issues. However, improving the transmission stability, heat dissipation efficiency, and pulverizing performance of the brushless motor platform within the food processor's power platform remains an urgent issue. Utility Model Content

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

[0007] In order to solve the above technical problems, the utility model provides a variable frequency direct-drive food processing machine, comprising a cup body assembly, comprising a cup body with a processing cavity, a cup cover covering an upper port of the cup body, a crushing knife arranged in the processing cavity and a cup seat arranged at the lower part of the cup body, a heating plate and a brushless motor are arranged in the cup seat, 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 knife to rotate; a main unit comprises a shell and an intelligent power drive module fixedly arranged in the shell, the intelligent power drive module is used to drive the brushless motor; a coupler comprises a coupler male end arranged on the cup body assembly, and a coupler female end arranged on the main unit; the brushless The 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 end 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 terminals 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 terminals on the intelligent power drive module respectively; the host is provided with a accommodating cavity with an opening, the accommodating cavity is used to accommodate the cup holder, and an isolation gap is formed between the inner wall of the accommodating cavity and the outer wall of the cup holder, and the isolation gap is arranged around the brushless motor.

[0008] Furthermore, the male end of the coupler also includes: a neutral wire PIN pin and a live wire PIN pin, which are electrically connected to the two wiring 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 pin and the live wire PIN pin respectively, and the other end is electrically connected to the neutral wire and live wire terminals on the intelligent power drive module.

[0009] Furthermore, the male end of the coupler also includes: a grounding PIN pin, which is electrically connected to the grounding lead wire 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 pin, and the other end is electrically connected to the ground terminal of the intelligent power drive module.

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

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

[0012] Furthermore, the cup body assembly also includes a thermostat and a fuse, one end of the thermostat is electrically connected to the live wire PIN pin, 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 pin.

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

[0014] Furthermore, the cup body assembly includes an anti-overflow device, and the wiring terminal of the anti-overflow device is electrically connected to the cup cover safety protection PIN pin.

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

[0016] Furthermore, the other end of the cup cover 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 the utility model are:

[0018] The food processor includes a cup assembly and a main unit. A heating plate and a brushless motor are located within the cup holder of the cup assembly. The brushless motor comprises a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft. The rotor shaft directly drives the pulverizer, thereby achieving variable frequency direct drive of the pulverizer, completely eliminating connector transmission jams and connector transmission noise. The main unit includes a housing and an intelligent power drive module fixed within the housing. The brushless motor is located within the cup holder and electrically connected to the intelligent power drive module via a coupler, thereby spatially isolating the brushless motor from the intelligent power drive module. The brushless motor is a detachable component that can be removed and installed with the cup assembly. The brushless motor is compact and lightweight, facilitating lightweight handling of the cup assembly while significantly shortening the brushless motor's rotor shaft, eliminating connector components, and reducing transmission costs and noise. Furthermore, the main unit improves space utilization, significantly enhancing the heat dissipation efficiency of the intelligent power drive module that drives the brushless motor, and improving the overall energy efficiency of the food processor.

[0019] In the field of food processing machines, the brushless motor platform does not spatially separate the brushless motor and the brushless motor control system, and those skilled in the art have no motivation to spatially separate the brushless motor body and the intelligent power drive module for driving the brushless motor. Therefore, there is no solution for connecting the brushless motor to the intelligent power drive module through a coupler. However, the brushless motor of the present application is detachably connected to the host with the cup body assembly, and the brushless motor is electrically connected to the intelligent power drive module through the coupler. The three-phase line high-voltage power of the brushless motor is connected to the intelligent power drive module in the host through the coupler, and the brushless power system and the control system are spatially separated, thereby greatly optimizing the transmission stability and reliability of the brushless platform of the food processing machine, as well as the reliability of the pulverizer blade steering switch and the life of the transmission system. In addition, the coupler PIN pins are saved while meeting the needs of hot drink production, so that the brushless motor and the intelligent power drive module are reliably coupled and connected to transmit high-frequency high-voltage signals with no more than 7 PINs, while fully ensuring the safety, hygiene and stability of the user when using the food processing machine.

[0020] The main unit is provided with a accommodating cavity with an opening, which is used to accommodate the cup holder. An isolation gap is formed between the inner wall of the accommodating cavity and the outer wall of the cup holder. The isolation gap is arranged around the brushless motor, so that a double isolation is formed between the brushless motor, which is detachably installed with the cup holder relative to the main unit, and the user. A first isolation gap is formed between the brushless motor and the cup holder, and a second isolation gap is formed between the cup holder and the inner wall of the accommodating cavity. The multiple isolation gaps can better block noise and vibration, and at the same time, the crushing and vibration noise of the crushing knife can be attenuated within the multiple isolation gaps, thereby optimizing the sound quality of the variable frequency direct-drive food processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the food processing machine described in the present invention.

[0023] Figure 2 This is a schematic diagram of the exploded view of the cup body assembly of the food processing machine described in the present invention.

[0024] Figure 3 This is a structural schematic diagram of the food processing machine cup holder and the male end of the coupler according to the present invention.

[0025] Figure 4 This is a schematic structural diagram of the heating plate of the food processing machine described in the present invention.

[0026] Figure 5 This is the electrical connection diagram of the food processing machine described in this utility model.

[0027] Figure 6 This is a schematic diagram of the coupler connection of the food processing machine described in the present invention.

[0028] Figure 7 This is another connection diagram of the coupler of the food processing machine described in the present invention.

[0029] Figure 8 This is a connection diagram of the coupler, intelligent power drive module and control board of the food processing machine described in the present invention.

[0030] Figure 9 This is another electrical connection diagram of the food processing machine described in the present invention.

[0031] Figure 10 This is another connection diagram of the coupler of the food processing machine described in the present invention.

[0032] Figure 11 This is another connection diagram of the coupler of the food processing machine described in the present invention.

[0033] Figure 12 This is a schematic diagram of the exploded main unit of the food processing machine of the present invention.

[0034] Figure 13 This is a schematic structural diagram of the cup body assembly of the food processing machine of the present invention.

[0035] Figure 14 for Figure 13 A partial enlarged view of the middle cup assembly.

[0036] Figure 15 This is a cross-sectional view of the main body of the food processing machine of the present invention.

[0037] Figure 16 This is a schematic diagram of the heat dissipation duct of the food processing machine described in the present invention.

[0038] The names of the components in the figure are as follows: 100, cup body assembly; 101, cup body; 102, cup cover; 103, crushing knife; 104, cup holder; 105, heating plate; 106, brushless motor; 107, stator assembly; 108, rotor assembly; 109, motor housing; 110, NTC; 111, fuse; 112, thermostat; 113, overflow prevention device; 114, cup holder 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; 122, safety switch;

[0039] 200, host; 201, housing; 202, intelligent power drive module; 203, IGBT module; 204, control board; 205, host air inlet; 206, isolation gap; 207, accommodation chamber;

[0040] 300, coupler; 301, coupler male end; 302, coupler female end; 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 terminal PIN; 311, overflow prevention PIN. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] like Figures 1 to 16As shown, the utility model provides a variable frequency direct-drive food processing machine, 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 cover 102 covering the upper port of the cup body, a crushing knife 103 arranged in the processing cavity and a cup seat arranged at the lower part of the cup body, a heating plate 105 and a brushless motor 106 are provided in the cup seat, the brushless motor 106 includes a stator assembly 107 and a rotor assembly 108, the rotor assembly includes a rotor shaft, and the rotor shaft directly drives the crushing knife 103 to rotate. Preferably, the crushing knife 103 is riveted to the end of the rotor shaft so that the brushless motor can directly drive the crushing knife 103 to rotate forward and reverse. As an optional optimization solution, the cup body assembly 100 also includes a safety switch 122 that is triggered after the cup cover is installed in place. The safety switch 122 is used for safety detection of whether the cup cover is installed in place. When the cup cover is installed in place, the cup cover triggers the safety switch to turn on and output an electrical signal, and the food processor executes the program normally. When the cup cover is not installed or not installed in place, the safety switch cannot be triggered, and the food processor cannot run the program normally, thereby avoiding mechanical damage to the user caused by the rotation of the crushing blade 103 when the cup cover is not installed. Furthermore, the safety switch can transmit the electrical signal to the host through the PIN pin of the coupler 300, or it can be transmitted to the host through the form of a connecting rod structure and triggered to convert into an electrical signal in the host. This setting does not require the coupler to transmit the electrical signal, saving the structure and number of the coupler PIN pins.

[0043] 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 within 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 processor includes a coupler 300, which includes a male end 301 of the coupler disposed on the cup assembly and a female end 302 of the coupler disposed on the main unit. The brushless motor is detachably connected to the main unit with the cup assembly 100. The brushless motor is electrically connected to the intelligent power drive module 202 via 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 with the cup assembly 100. The brushless motor is small in size and light in weight, which not only facilitates the lightweight removal and placement of the cup assembly 100, but also greatly shortens the length of the brushless motor rotor shaft, reduces the number of connector components, and reduces transmission costs and transmission noise. Furthermore, the space utilization rate 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 energy consumption of the entire food processor. Specifically, the IGBT module 203 includes an IPM chip. Compared to the simple control mode of a series-wound motor, a brushless motor requires a separate intelligent power driver module 202 to drive the brushless motor. The high-frequency operation of the U / V / W three-phase brushless motor causes the temperature of the IGBT module 203 to rise sharply. Therefore, if the maximum pulping capacity of the matching food processor cup is greater than 1.5L, it is preferable to dissipate heat from the IGBT module 203 to ensure normal and efficient operation of the IGBT module 203, thereby ensuring the operational stability of the brushless motor. If the maximum pulping capacity of the cup is less than 1.5L, the IGBT module 203 may be configured without an independent cooling duct or independent cooling fan, so that the mounting cavity inside the main machine forms a natural heat dissipation space for the IGBT module 203.

[0044] In the field of food processing machines, spatially separating the brushless motor and the brushless motor control system, that is, placing the brushless motor in the cup holder 104 and the intelligent power drive module 202 in the main machine, not only satisfies the efficient and low-noise transmission requirements of the brushless motor rotor shaft directly connected to drive the crushing blade 103, but also provides efficient heat dissipation space for the intelligent power drive module 202 and a heat dissipation path that can be expanded according to different food processing machine platforms. It also further improves the interchangeability of the cup assembly 100, thereby improving the standardization rate and design planning of the entire brushless motor platform, and minimizing design costs and manufacturing anomalies. However, 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 do not have a specific solution for connecting the brushless motor to the intelligent power drive module 202 via a coupler. The brushless motor of the present application is detachably connected to the host along with the cup body assembly 100. The brushless motor is electrically connected to the intelligent power drive module 202 via the coupler. The three-phase line power of the brushless motor is connected to the intelligent power drive module 202 in the host via the coupler, and the brushless power system and the control system are spatially separated, thereby greatly optimizing the transmission stability and reliability of the brushless platform of the food processor, as well as the reliability of the steering switch of the crushing blade 103 and the life of the transmission system. Preferably, the cup body assembly 100 also includes an NTC 110 for detecting the temperature of the material in the processing chamber. The NTC can indirectly measure the temperature of the material in the cup by being in close contact with the heating plate 105, or directly measure the temperature of the material in the cup by extending into the cup body.

[0045] As a preferred embodiment, based on the solution that the brushless motor is set in the cup body assembly 100 and the intelligent power drive module 202 is set in the host, the coupler preferably adopts a 7-pin coupler. Specifically, the male end 301 of the coupler includes:

[0046] The U-phase PIN pin 303 , the V-phase PIN pin 304 and the W-phase PIN pin 305 are electrically connected to the U-phase, V-phase and W-phase output lines of the brushless motor, respectively.

[0047] The ground terminal PIN 308 is electrically connected to the ground terminal lead wire of the brushless motor.

[0048] The neutral line PIN pin 306 and the live line PIN pin 307 are electrically connected to the two connection terminals of the heating plate 105 respectively.

[0049] NTC terminal PIN pin 310, one end of the NTC is electrically connected to the NTC terminal PIN pin, and the other end is electrically connected to the ground terminal PIN pin.

[0050] The coupler female end 302 includes:

[0051] The U-phase, V-phase and W-phase terminals have one end electrically connected to the U-phase, V-phase and W-phase PIN pins respectively, and the other end electrically connected to the U-phase, V-phase and W-phase wiring terminals on the intelligent power drive module 202 respectively.

[0052] A ground terminal, one end of which is electrically connected to the ground PIN pin, and the other end of which is electrically connected to the ground terminal of the intelligent power driving module 202 .

[0053] The neutral terminal and the live terminal have one end electrically connected to the neutral PIN pin and the live PIN pin respectively, and the other end electrically connected to the neutral and live terminals on the intelligent power drive module 202 .

[0054] The NTC terminal has one end electrically connected to the NTC terminal PIN, and the other end electrically connected to the connection terminal of the intelligent power driving module 202 .

[0055] The cup assembly 100 further includes a thermostat 112 and a fuse 111. Preferably, the thermostat 112 and fuse 111 are disposed at the bottom of the heating plate 105. The thermostat 112 and fuse 111 are connected in series with the heating plate 105 between the live and neutral pins. Specifically, the heating plate 105 is provided with the thermostat 112 and fuse 111. A heat dissipation cavity 116 is formed between the heating plate 105 and the lower housing of the motor. The thermostat 112 and fuse 111 are disposed within the heat dissipation cavity 116 and are located above the rotor assembly 108 and the stator assembly 107. This conserves space and maintains a stable temperature rise of the brushless motor without being affected by the heating plate 105. One end of the thermostat 112 is electrically connected to the live wire PIN, the other end of the thermostat 112 is electrically connected to one terminal of the heating disk 105, one end of the fuse 111 is electrically connected to the other terminal of the heating disk 105, and the other end of the fuse 111 is electrically connected to the neutral wire PIN. The coupler adopts a 7-pin coupler, and the electrical connection between the brushless motor and the intelligent power drive module 202 is achieved on the basis of concentrating the PIN pins as much as possible, ensuring stable and reliable connection and operation of the brushless motor. The cup cover can be set to trigger the switch in the host through a structural linkage trigger device to generate an electrical signal to perform a safety check on whether the cup cover is in place, or the cup cover detection can be not set in advance before the cup body structure meets the safety requirements.

[0056] As another preferred embodiment, Figures 3 to 8 As shown, the brushless motor is set in the cup body assembly 100, the intelligent power drive module 202 is set in the host, and the coupler preferably adopts an 8PIN coupler. The safety switch can be a micro switch, a magnetic control switch or a Figure 7 Specifically, the coupler male end 301 includes:

[0057] The U-phase, V-phase and W-phase PIN needles are electrically connected to the U-phase, V-phase and W-phase output lines of the brushless motor respectively.

[0058] The ground terminal PIN 308 is electrically connected to the ground terminal lead wire of the brushless motor.

[0059] The neutral line PIN pin 306 and the live line PIN pin 307 are electrically connected to the two connection terminals of the heating plate 105 respectively.

[0060] NTC terminal PIN pin 310, one end of the NTC is electrically connected to the NTC terminal PIN pin, and the other end is electrically connected to the ground terminal PIN pin.

[0061] The cup cover safety protection PIN needle 309 is electrically connected to one terminal of the safety switch, and the other terminal of the safety switch is electrically connected to the ground PIN needle.

[0062] The coupler female end 302 includes:

[0063] The U-phase, V-phase and W-phase terminals have one end electrically connected to the U-phase, V-phase and W-phase PIN pins respectively, and the other end electrically connected to the U-phase, V-phase and W-phase wiring terminals on the intelligent power drive module 202 respectively.

[0064] A ground terminal, one end of which is electrically connected to the ground PIN pin, and the other end of which is electrically connected to the ground terminal of the intelligent power driving module 202 .

[0065] The neutral terminal and the live terminal have one end electrically connected to the neutral PIN pin and the live PIN pin respectively, and the other end electrically connected to the neutral and live terminals on the intelligent power drive module 202 .

[0066] The NTC terminal has one end electrically connected to the NTC terminal PIN, and the other end electrically connected to the connection terminal of the intelligent power driving module 202 .

[0067] The cup cover safety protection terminal has one end electrically connected to the cup cover safety protection PIN pin, and the other end electrically connected to the connection terminal of the intelligent power drive module 202.

[0068] 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 are connected in series with the heating plate 105 between the live wire PIN and the neutral wire PIN.

[0069] As another preferred embodiment, Figure 11As shown, the cup assembly 100 includes an anti-overflow device 113 for anti-overflow detection. The brushless motor is set in the cup assembly 100, and the intelligent power drive module 202 is set in the host. The coupler preferably adopts an 8PIN coupler. Specifically, the male end 301 of the coupler includes:

[0070] The U-phase, V-phase and W-phase PIN needles are electrically connected to the U-phase, V-phase and W-phase output lines of the brushless motor respectively.

[0071] The ground terminal PIN is electrically connected to the ground terminal lead wire of the brushless motor.

[0072] The neutral line PIN pin and the live line PIN pin are electrically connected to the two connection terminals of the heating plate 105 respectively.

[0073] NTC terminal PIN pin, one end of the NTC is electrically connected to the NTC terminal PIN pin, and the other end is electrically connected to the ground terminal PIN pin.

[0074] The overflow prevention PIN needle 311 is electrically connected to the terminal of the overflow prevention device 113;

[0075] The coupler female end 302 includes:

[0076] The U-phase, V-phase and W-phase terminals have one end electrically connected to the U-phase, V-phase and W-phase PIN pins respectively, and the other end electrically connected to the U-phase, V-phase and W-phase wiring terminals on the intelligent power drive module 202 respectively.

[0077] A ground terminal, one end of which is electrically connected to the ground PIN pin, and the other end of which is electrically connected to the ground terminal of the intelligent power driving module 202 .

[0078] The neutral terminal and the live terminal have one end electrically connected to the neutral PIN pin and the live PIN pin respectively, and the other end electrically connected to the neutral and live terminals on the intelligent power drive module 202 .

[0079] The NTC terminal has one end electrically connected to the NTC terminal PIN, and the other end electrically connected to the connection terminal of the intelligent power driving module 202 .

[0080] An anti-overflow terminal has one end electrically connected to the anti-overflow PIN needle and the other end electrically connected to the wiring terminal of the brushless motor power drive module.

[0081] The cup assembly 100 further includes a thermostat 112 and a fuse 111. Preferably, the thermostat 112 and fuse 111 are disposed at the bottom of the heating plate 105. The thermostat 112 and fuse 111 are connected in series with the heating plate 105 between the live and neutral pins. The overflow prevention device 113 may be a overflow prevention electrode rod, an overflow prevention electrode sheet, a capacitive overflow prevention element, or other device capable of measuring the slurry height and transmitting signals.

[0082] As another preferred embodiment, Figure 9 and Figure 10 As shown, the brushless motor is installed in the cup body assembly 100, and the intelligent power drive module 202 is installed in the host. The coupler preferably adopts an 8-pin coupler, and the cup lid safety detection signal and the NTC detection signal are transmitted by PIN pin multiplexing. Specifically, the cup body assembly 100 includes an overflow prevention device 113 and a safety switch triggered when the cup lid is installed in place. The terminal of the overflow prevention device 113 is electrically connected to the cup lid safety protection PIN pin, which is equivalent to the overflow prevention PIN pin being multiplexed with the cup lid safety protection PIN pin.

[0083] As another preferred embodiment, Figure 11 As shown, the coupler preferably uses an 8-pin coupler. The cup assembly 100 also includes an overflow prevention device 113. The male end 301 of the coupler includes an overflow prevention PIN pin electrically connected to the terminal of the overflow prevention device 113. The female end 302 of the coupler includes an overflow prevention terminal, one end of which is electrically connected to the overflow prevention PIN pin and the other end is electrically connected to the terminal of the brushless motor power drive module. The cup assembly 100 includes a safety switch triggered when the cup cover is installed in place and an NTC for detecting the temperature of the material in the processing chamber. The male end 301 of the coupler includes a cup cover safety protection PIN pin and an NTC terminal PIN pin. The safety switch and NTC are connected in series between the cup cover safety protection PIN pin and the ground terminal PIN pin.

[0084] like Figure 8 As shown, the other end of the cup cover 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.

[0085] Based on the prior art food processing machine with a detachable cup body and main unit, a coupler is generally used to electrically connect the heating plate 105 to the control board 204 in the main unit to transmit electrical signals. Patent application number CN202121196456.1 discloses a three-in-one multifunctional all-in-one machine that uses a PIN pin coupler to realize the replacement of cookware with different functions. However, in the field of food processing machines, there is no solution to spatially separate the brushless motor and the intelligent power drive module 202 for driving the brushless motor. Based on the stable performance of the brushless motor itself, those skilled in the art have no motivation to separate the brushless motor and the intelligent power drive module 202.

[0086] Specifically, the brushless motor is arranged above the coupler, and the brushless motor intelligent power module is arranged below the coupler, so that the coupler spatially separates the brushless motor and the intelligent power drive module 202, while electrically connecting them through the coupler. This arrangement allows the capacity of the cup body to be more miniaturized, and the outer diameter of the cup holder 104 is smaller, which is equivalent to the outer diameter of the brushless motor defining the minimum outer diameter of the cup body, making it more convenient and labor-saving for the user to take and put the cup body, and the intelligent power drive module 202 is arranged below the coupler, reusing the space inside the host for accommodation and heat dissipation, making the control of the brushless motor more reliable and stable. Preferably, the intelligent power drive module 202 includes a base and an IGBT module 203 arranged on the base, and the projection of the base on the horizontal plane covers the projection of the coupler on the horizontal plane. Furthermore, the base is arranged horizontally to minimize the height of the main unit. The flattening of the brushless motor itself reduces the height of the cup holder 104, and the horizontally arranged intelligent power drive module 202 reduces the height of the main unit, thereby greatly reducing the overall height of the food processor and greatly improving the stability and reliability of the power transmission system.

[0087] As a preference, Figure 16As shown, the main body housing is provided with a main body air inlet 205. The cooling medium flows through the IGBT module 203 via the main body air inlet 205, then ascends through the heat dissipation outer cavity 115 and the heat dissipation inner cavity 116 and flows through the stator assembly and rotor assembly. This allows the heat dissipation ducts for the IGBT module 203 and the motor to extend longitudinally across the cup holder space and the base space, allowing the brushless motor's 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 assembly and stator assembly. The cup holder housing 114 is disposed around the brushless motor 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 arranged in communication. The cup holder includes a cup base 117, the heating plate 105 is sealed and clamped between the lower end of the cup body and the cup base 117, and the male end 301 of the coupler is fixedly arranged 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 integrated lateral seal portion 119 and a radial seal portion 120. The lateral seal portion 119 is clamped and sealed between the inner sidewall of the lower end of the cup body and the outer sidewall of the heating plate 105, and the radial seal portion 120 is wrapped around a radially outwardly extending edge 121 at the bottom of the heating plate 105, thereby providing a reliable seal even in situations where radial space is limited. This is particularly suitable for assembling and sealing small-capacity cup assemblies 100. The coupler male end 301 and the cup holder housing 114 are connected to the cup base 117 via screws to secure the coupler male end 301 below the brushless motor, allowing the brushless motor and coupler to partially or completely overlap in a horizontal projection plane, thereby significantly reducing the outer diameter of the cup assembly 100, especially the outer diameter of the cup holder.

[0088] As a preference, Figure 15 and Figure 16As shown, the main unit is provided with a accommodating cavity 207 with an opening, and the accommodating cavity 207 is used to accommodate the cup holder. An isolation gap 206 is formed between the inner wall of the accommodating cavity and the outer wall of the cup holder. The isolation gap 206 is arranged around the brushless motor, so that a double isolation is formed between the brushless motor that is detachably installed with the cup holder relative to the main unit 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 accommodating cavity. Furthermore, a third isolation gap 206 can be formed between the side wall of the accommodating 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, the crushing and vibration noise of the crushing knife 103 can be reduced within the multiple isolation gaps 206, thereby optimizing the sound quality of the variable frequency direct-drive food processor.

[0089] It can be understood that the male end 301 of the coupler can also be set on the outside of the motor, which is equivalent to the male end 301 of the coupler partially or completely overlapping with the brushless motor in the vertical projection plane, making full use of the height space of the cup seat, making the cup seat flat, and reducing the height of the cup body assembly 100. The center of gravity of the brushless motor is closer to the center of gravity of the crushing knife 103, and the length of the rotor shaft and the height of the main machine are also reduced, which is more conducive to optimizing the sound quality of the food processor transmission system and improving the operating stability.

[0090] As can be understood, the intelligent power driver module 202 includes a base and an IGBT module 203 disposed on the base. The base can also be disposed longitudinally within the host housing. A control board 204 is also disposed longitudinally within the host housing. A fixing bracket is also provided within the host housing, and the control board 204 and the base are respectively fixed to either side of the fixing bracket.

[0091] It can be understood that the coupler can also be set to a split type, and the coupler male end 301 includes a split first coupler male end 301 and a second coupler male end 301. The first coupler male end 301 and the second coupler male end 301 are both provided with 4-pin pins, and the coupler female end 302 is provided one-to-one with one of them, thereby further optimizing the coupling space in the cup holder, making the structural connection and electrical connection between the coupler and the brushless motor and the intelligent power drive module 202 more intensive in space resources and efficiency.

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

Claims

1. A variable frequency direct drive food processing machine, characterized in that: include: The cup body assembly includes a cup body having a processing cavity, a cup cover covering an upper port of the cup body, a crushing knife disposed in the processing cavity, and a cup base disposed at the lower portion of the cup body. A heating plate and a brushless motor are disposed in the cup base. The brushless motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft. The rotor shaft directly drives the crushing knife to rotate. A host, comprising a housing and an intelligent power drive module fixedly disposed in the housing, wherein the intelligent power drive module is used to drive the brushless motor; A coupler, comprising a male end of the coupler provided on the cup assembly, and a female end of the coupler provided 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 end 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 terminal on the intelligent power drive module respectively; The host is provided with a receiving cavity with an opening, the receiving cavity is used to receive the cup holder, an isolation gap is formed between the inner wall of the receiving cavity and the outer wall of the cup holder, and the isolation gap is arranged around the brushless motor.

2. The food processing machine according to claim 1, wherein The male end of the coupler further comprises: a neutral line PIN pin and a live line PIN pin, which are electrically connected to the two connection terminals of the heating plate respectively; The coupler female end further includes: a neutral terminal and a live terminal, one end of which is electrically connected to the neutral PIN pin and the live PIN 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, wherein The male end of the coupler further includes: a ground terminal PIN pin electrically connected to the ground terminal lead wire of the brushless motor; The coupler female end further includes: a grounding terminal, one end of which is electrically connected to the grounding PIN pin, and the other end of which is electrically connected to the grounding terminal of the intelligent power driving module.

4. The food processing machine according to claim 3, characterized in that The cup assembly further includes a safety switch that is triggered when the cup cover is installed in place, and the male end of the coupler includes: a cup cover safety protection PIN pin electrically connected to one terminal of the safety switch, and the other terminal of the safety switch electrically connected to the ground PIN pin; The coupler female end includes: a cup cover safety protection terminal, one end of which is electrically connected to the cup cover safety protection PIN needle, 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 further includes an NTC for detecting the temperature of the material in the processing chamber, the male end of the coupler includes an NTC end PIN pin, one end of the NTC is electrically connected to the NTC end PIN pin, and the other end is electrically connected to the ground end PIN pin; The coupler female end includes: an NTC terminal, one end of which is electrically connected to the NTC terminal 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 body assembly also includes a thermostat and a fuse, one end of the thermostat is electrically connected to the live wire PIN pin, 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 pin.

7. The food processing machine according to claim 3, characterized in that The cup body assembly also includes an anti-overflow device, and the male end of the coupler includes: an anti-overflow PIN needle, 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 needle, and the other end is electrically connected to the wiring terminal of the intelligent power drive module.

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

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

10. The food processor according to claim 4, wherein The other end of the cup cover safety protection 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.

11. The food processor according to claim 5, characterized in that 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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