WO2020007105A1

WO2020007105A1 - Food processor

Info

Publication number: WO2020007105A1
Application number: PCT/CN2019/084370
Authority: WO
Inventors: 吴迪; 武谷雨; 陈金涛; 龚黎明; 诸自强
Original assignee: 广东威灵电机制造有限公司; 美的威灵电机技术（上海）有限公司
Priority date: 2018-07-03
Filing date: 2019-04-25
Publication date: 2020-01-09
Also published as: CN110664281A

Abstract

Provided is a food processor, comprising: a container (10), a base (20), an electric motor (21), a first rotating shaft (13), a second rotating shaft (14), first cutting tools (11, 15) and a second cutting tool (12), the electric motor (21) mounted inside the base (20) comprising a stator (211), first rotors (212, 214) and second rotors (213, 215), wherein the stator (211), the first rotors (212, 214) and the second rotors (213, 215) are nested with each other; each adjacent pair of the stator (211), the first rotors (212, 214) and the second rotors (213, 215) are separated by an air gap; the first rotors (212, 214) and the second rotors (213, 215) rotate independent from each other; and the first rotors (212, 214) and the second rotors (213, 215) are respectively used for driving the first rotating shaft (13) provided with the first cutting tools (11, 15) and the second rotating shaft (14) provided with the second cutting tool (12) to rotate independently, thereby completely grinding food and improving the grinding efficiency and the grinding effect. The food processor operates in a way of no mechanical differential and no clutch to achieve dual-power food grinding, and has a high integration level, high power density, low energy consumption and high reliability.

Description

Cooking machine

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on July 3, 2018, with application number 201810717805.6, and the invention name is "cooking machine", the entire contents of which are incorporated herein by reference.

Technical field

The present application relates to the technical field of household appliances, and in particular, to a cooking machine.

Background technique

The broken wall cooking machine in the related art includes a cup bottom and a cup holder, a motor is installed inside the base, and an output shaft of the motor extends into the cup body to connect a single blade. During the use, the following disadvantages were found: when a single blade rotates and crushes food at a high speed, a helical molten solid-liquid mixture is formed inside the cup body. The unpulverized food will be away from the blade and cannot directly contact the blade under the action of centrifugal force. As a result, the food cannot be completely crushed, the plant biochemicals cannot be completely released, and the nutritional value of the beverage is reduced; the rotation speed of the blade is required to be above 20,000 rpm, the performance requirements of the motor are more stringent, the cost is higher, and the motor is in a high load working state for a long time. Its service life and structural stability will cause certain damage; the existing double-shaft wall-breaking cooking machine is essentially two motors that output double speeds in series in the axial direction, which increases the axial height, weight and cost of the cup holder.

Summary of the invention

The present application aims to solve at least one of the above technical problems.

Therefore, an object of the present application is to provide a cooking machine.

In order to achieve the above object, the technical solution of the present application provides a cooking machine, comprising: a base, a motor is installed inside the base, and the motor is connected with a first rotating shaft and a second rotating shaft; and a container is installed on the base. The first rotary shaft and the second rotary shaft both extend into the inner cavity of the container, and the first rotary shaft is provided with a first cutter, and the second rotary shaft is provided with a first rotary shaft. Two tools; wherein the motor includes a stator, a first rotor, and a second rotor, the stator, the first rotor, and the second rotor are nested with each other, and the stator, the first rotor, and Each adjacent two of the second rotors are spaced by an air gap, the first rotor and the second rotor rotate independently of each other, and one of the first rotor and the second rotor is different from the first rotor A rotating shaft is fixedly connected, and the other of the first rotor and the second rotor is fixedly connected to the second rotating shaft.

The cooking machine provided by the above technical solution of the present application adopts a dual-rotation-shaft dual-power rotation structure. The first rotor and the second rotor independently drive the first and second rotation shafts to rotate. The first rotation shaft drives a first cutter (such as a first blade). ) Rotate at a high speed to pulverize the food and produce a spiral slide. The second rotating shaft drives the second cutter (such as the second blade) to rotate at a high speed and plays the role of pulverizing the food and turbulent reflecting swirl. The pulverizing area formed between the first blades is fully pulverized many times to improve the pulverization efficiency and the pulverization effect, and a beverage with high nutritional value can be obtained. At the same time, compared with the existing single-blade wall-breaking cooking machine, the blade rotation speed can be reduced by half. It achieves good crushing effect and reduces the performance requirements of the motor. At the same time, the motor runs at a relatively low speed, which is beneficial to its service life and stable structure. At the same time, compared with the existing two motors, the scheme of outputting double speeds in series in the axial direction , Which reduces the axial height, weight and cost of the cup holder (that is, the base); secondly, it adopts a method of no mechanical differential speed and no clutch to achieve double Food pulverizing force, high integration, low power consumption, and reliability due to the reduction of mechanical components greatly enhanced.

In addition, the cooking machine provided in the above technical solution of the present application may also have the following additional technical features:

In the above technical solution, preferably, the first rotating shaft is a hollow shaft, the second rotating shaft protrudes upward through a hollow portion in the middle of the first rotating shaft, and the first rotating shaft and the second rotating shaft are the same Axis rotation.

In the above technical solution, preferably, the stator includes a stator core and a stator winding, and the stator winding is wound on the stator core, wherein the stator includes one set of stator windings or two sets of stator windings.

Specifically, a set of stator windings can be used to drive the reluctance rotor and permanent magnet rotor to rotate independently of each other, or two sets of stator windings can be used to drive the reluctance rotor and permanent magnet rotor to rotate independently of each other; the stator includes two sets of stator windings. In the case, the number of phases of the two sets of stator windings may be the same or different. Therefore, the number of phases of the two sets of stator windings may be selected according to actual needs, thereby improving the practicability of the stator.

In the above technical solution, preferably, the stator further includes a stator case, and the stator case is sleeved on the outside of the stator core.

The stator casing can protect and isolate the stator core, thereby improving the safety and reliability of the dual-shaft dual-power motor during operation.

In the above technical solution, preferably, the stator, the first rotor, and the second rotor are sequentially nested from the inside to the outside or from the outside to the inside.

In the above technical solution, preferably, the first rotor is a reluctance rotor, and the second rotor is a permanent magnet rotor.

The dual-shaft, dual-power motor uses the reluctance modulation effect to generate driving torque, and the torque density is higher than that of a conventional permanent magnet motor, which further increases the power density of the system and reduces energy consumption.

In the above technical solution, preferably, the magnetoresistive rotor includes a magnetically conductive magnetoresistive iron core and a non-magnetically conductive spacer block, and the magnetoresistive iron core and the spacer block are alternately arranged in a ring shape.

Therefore, the structure of the magnetoresistive rotor can be simplified, and processing and manufacturing of the magnetoresistive rotor can be facilitated.

In the above technical solution, preferably, the permanent magnet rotor includes a permanent magnet core and magnetic steel, and the magnetic steel includes a plurality of adjacently spaced along the circumferential direction of the permanent magnet core, and two adjacent ones The magnet steel has the opposite polarity.

Therefore, it is beneficial to realize the rotation of the permanent magnet rotor and the stator through electromagnetic induction.

In the above technical solution, preferably, the stator includes a stator core and a set of stator windings wound on the stator core, and the number of the magnetoresistive cores is _pr , and the windings of the stator winding The span is y _1s and a rotating magnetic field with a pole pair number p _{s is} formed, and the permanent magnet rotor forms a permanent magnetic field with a pole pair number p _f , where: p _r = | p _s ± p _f |; p _f ≠ p _s .

In the above technical solution, preferably, the current injection frequency of the stator winding satisfies: ω _s = p _r Ω _r -p _f Ω _f , where ω _s is the control frequency of the stator winding, and Ω _r and Ω _f are magnetic The mechanical rotation speed of the resistance rotor and the permanent magnet rotor; the current injection phase angle of the stator winding satisfies: θ _s = -p _r θ _r + p _f θ _f , where θ _s is the phase angle of the injection current axis of the stator winding, θ _f and θ _r are the mechanical angle differences between the permanent magnet rotor and the reluctance rotor aligned with the d-axis.

In the above technical solution, preferably, the stator includes a stator core and two sets of stator windings wound on the stator core. The number of the magnetoresistive cores is _pr , and the two sets of stator windings. winding span respectively y _1s and y _1ad, and a rotating magnetic field formed on the pole number p _s and p _ad of the permanent magnetic field of the permanent magnet rotor is formed to the pole number p _f, where: p _r = | p _s ± p _f |; p _ad = p _f ≠ p _s ; y _1s ≠ y _1ad .

In the above technical solution, preferably, the current injection frequencies of the two sets of stator windings respectively satisfy: ω _s = p _r Ω _r- p _f Ω _f ; ω _ad = p _f Ω _f , where ω _s and ω _ad are respectively Is the control frequency of the two sets of windings, Ω _r and Ω _f are the mechanical speeds of the reluctance rotor and permanent magnet rotor, respectively; the current injection phase angles of the two sets of stator windings respectively satisfy: θ _s = -p _r θ _r + p _f θ _f ; θ _ad = -p _f θ _f , where θ _s and θ _ad are the phase angles of the injection current axis of the two sets of windings, θ _f and θ _r are the permanent magnet rotor and the reluctance rotor aligned with the d axis The mechanical angle of the position is poor.

In any of the above technical solutions, preferably, the stator is provided between the first rotor and the second rotor, and the stator includes a stator core and two sets of stator windings, and the two sets of stator windings are both It is wound on the stator core, and the two sets of stator windings respectively correspond to the first rotor and the second rotor to drive the first rotor and the second rotor to rotate independently.

The two sets of stator windings are used to drive the first rotor and the second rotor to rotate independently, so that the first rotating shaft fixedly connected to the first rotor and the second rotating shaft fixedly connected to the second rotor are independently rotated, thereby realizing the first sector 2. The second sector can rotate at different or the same speed, different or the same direction.

In any of the above technical solutions, preferably, the first cutter includes one or more groups of first blades, the second cutter includes one or more groups of second blades, and the first blade is inclined upward, so A crushing area is formed between the second blade and the first blade.

The food to be pulverized is placed in the inner cavity of the container, and the pulverizing area formed between the second blade and the first blade by the food to be pulverized is fully pulverized multiple times to further improve the pulverization effect.

In any of the above technical solutions, preferably, the first cutter and / or the second cutter are stirring claws or stirring rods, and the stirring claws or stirring rods are used to stir the food to be crushed evenly.

For example, the first cutter is a stirring claw or a stirring rod, and the second cutter is a stirring blade. The stirring blade is used to pulverize the food to be crushed, and the stirring claw or the stirring rod is used to stir the food to be crushed uniformly, thereby improving the crushing efficiency and crushing. effect.

Additional aspects and advantages of the application will become apparent in the following description, or be learned through practice of the application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

1 is a schematic structural diagram of a cooking machine according to an embodiment of the present application;

2 is a schematic structural diagram of a cooking machine according to another embodiment of the present application;

3 is a schematic structural diagram of a cooking machine according to another embodiment of the present application;

4 is a schematic structural diagram of a dual-shaft dual-power motor according to an embodiment of the present application;

5 is a schematic structural diagram of a cooking machine according to another embodiment of the present application;

FIG. 6 is a schematic structural diagram of a dual-shaft dual-power motor according to another embodiment of the present application.

Wherein, the corresponding relationship between the reference numerals in FIG. 1 to FIG. 6 and the component names is:

Cooking machine 1

Container 10, base 20;

A first blade 11, a second blade 12, a first rotating shaft 13, a second rotating shaft 14, and a stirring claw 15;

Biaxial dual power motor 21, stator 211, reluctance rotor 212, permanent magnet rotor 213, first rotor 214, second rotor 215;

Stator core 2111, stator winding 2112, stator housing 2113, magnetoresistive core 2121, spacer 2122, magnetic steel 2131, permanent magnet core 2132;

The first bearing 31, the second bearing 32, the first transmission shaft 33, and the second transmission shaft 34.

detailed description

In order to more clearly understand the foregoing objectives, features, and advantages of the present application, the present application is described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present application. However, the present application can also be implemented in other ways than those described herein. Therefore, the scope of protection of the present application is not limited to the specifics disclosed below. Limitations of Examples.

A cooking machine according to some embodiments of the present application will be described below with reference to FIGS. 1 to 6.

As shown in FIG. 1 to FIG. 6, a cooking machine 1 according to some embodiments of the present application includes a container 10, a base 20, a motor 21, and a first cutter (as shown in FIG. 1, FIG. 2, and FIG. 5). The first blade 11, such as the stirring claw 15 in FIG. 3), the second cutter (such as the second blade 12 in FIG. 1, FIG. 2, FIG. 3, and FIG. 5), the first rotating shaft 13, and the second rotating shaft 14, The crushed food is placed in the inner cavity of the container 10, the container 10 is installed above the base 20, and the motor 21 is installed inside the base 20.

Specifically, the motor 21 is a dual-shaft dual-power motor, and the dual-shaft dual-power motor 21 includes a stator 211 and a first rotor (such as the reluctance rotor 212 in FIGS. 1 to 4, and the first rotor as shown in FIGS. 5 and 6). 214) and a second rotor (such as the permanent magnet rotor in FIGS. 1 to 4, and the second rotor 215 in FIG. 5 and FIG. 6), the stator 211, the first rotor, and the second rotor are nested with each other, and the stator 211 Each adjacent two of the first and second rotors are separated by an air gap. The first and second rotors rotate independently of each other. The stator 211 includes a stator core 2111 and a stator winding 2112. The stator winding 2112 is wound. On the stator core 2111, one of the first rotor and the second rotor is fixedly connected to the first rotating shaft 13 for driving the first rotating shaft 13 to rotate, and the other of the first and second rotors is connected to the second rotating shaft 14. The fixed connection is used to drive the second rotating shaft 14 to rotate, so that the first rotor and the second rotor independently drive the first rotating shaft 13 and the second rotating shaft 14 to rotate, so that the food to be pulverized rotates concentrically with the first cutter and the second cutter. Fully crushed under the interaction.

In an embodiment of the present application, as shown in FIGS. 1 to 4, the dual-shaft dual-power motor 21 includes a ring-shaped stator 211, a reluctance rotor 212, and a permanent magnet rotor 213, the stator 211, the reluctance rotor 212, and a permanent magnet. The magnetic rotor 213 is nested in order from the inside to the outside or from the outside to the inside, that is, the magnetoresistive rotor 212 is always located between the stator 211 and the permanent magnet rotor 213. The stator 211 may be located outside the magnetoresistive rotor 212 and the permanent magnet rotor 213 is located in the magnetic field. The inside of the resistance rotor 212, or the stator 211 is inside the magnetoresistive rotor 212 and the permanent magnet rotor 213 is outside the magnetoresistive rotor 212; each adjacent two of the stator 211, the magnetoresistive rotor 212, and the permanent magnet rotor 213 are spaced by an air gap In other words, there is an air gap between the stator 211 and the reluctance rotor 212, and there is also an air gap between the reluctance rotor 212 and the permanent magnet rotor 213, so as to ensure the Rotation independence.

Further, as shown in FIG. 4, the stator 211 includes a stator core 2111 and a stator winding 2112, wherein the stator core is made of a highly magnetically permeable material, and the stator winding 2112 is wound on the stator core, as shown in FIG. 1 and FIG. As shown in FIG. 2 and FIG. 3, one of the reluctance rotor 212 and the permanent magnet rotor 213 is fixedly connected to the first rotation shaft 13 for driving the first rotation shaft 13 to rotate, and the other of the reluctance rotor 212 and the permanent magnet rotor 213 is connected to the first rotation shaft 13. The second rotating shaft 14 is fixedly connected to drive the second rotating shaft 14 to rotate; and the first rotating shaft 13 and the second rotating shaft 14 both extend into the inner cavity of the container 10, and the second rotating shaft 14 protrudes upward through a hollow portion in the middle of the first rotating shaft 13. A first cutter is mounted on the first rotary shaft 13 and a second cutter is mounted on the second rotary shaft 14. The magnetoresistive rotor 212 and the permanent magnet rotor 213 independently drive the first rotary shaft 13 and the second rotary shaft 14 to rotate, and the food is coaxial. The rotating first cutter and the second cutter are fully crushed under the interaction of the first cutter and the second cutter.

That is, when the magnetoresistive rotor 212 is fixedly connected to the first rotating shaft 13 through the first transmission shaft 33 (or the second transmission shaft 34) and drives the first rotating shaft 13 to rotate, thereby driving the first tool to rotate, the permanent magnet rotor 213 passes The second transmission shaft 34 (or the first transmission shaft 33) is fixedly connected to the second rotation shaft 14 and drives the second rotation shaft 14 to rotate, thereby driving the second cutter to rotate; when the reluctance rotor 212 passes the first transmission shaft 33 (or the second transmission) The shaft 34) is fixedly connected to the second rotating shaft 14 and drives the second rotating shaft 14 to rotate, thereby driving the second tool to rotate. The permanent magnet rotor 213 is fixedly connected to the first rotating shaft 13 through the second transmission shaft 34 (or the first transmission shaft 33) and The first rotating shaft 13 is driven to rotate, and then the first blade 11 is driven to rotate, and the food is fully crushed under the interaction of the first and second cutters rotating coaxially.

In a specific embodiment, as shown in FIG. 1, the stator 211 is located outside the magnetoresistive rotor 212, and the stator 211, the magnetoresistive rotor 212, and the permanent magnet rotor 213 are sequentially nested from the outside to the inside, and the magnetoresistive rotor 212 passes through the first transmission shaft. 33 is fixedly connected to the first rotating shaft 13 and drives the first rotating shaft 13 to rotate, thereby driving the first blade 11 mounted on the first rotating shaft 13 to rotate, and the permanent magnet rotor 213 is directly fixedly connected to the second rotating shaft 14 and drives the second rotating shaft 14 to rotate, Further, the second blade 12 mounted on the second rotating shaft 14 is driven to rotate.

In another specific embodiment, as shown in FIG. 2, the stator 211 is located inside the magnetoresistive rotor 212, the stator 211, the magnetoresistive rotor 212, and the permanent magnet rotor 213 are sequentially nested from the inside to the outside, and the magnetoresistive rotor 212 passes through the second transmission. The shaft 34 is fixedly connected to the second rotating shaft 14 and drives the second rotating shaft 14 to rotate, thereby driving the second blade 12 mounted on the second rotating shaft 14 to rotate, and the permanent magnet rotor 213 is fixedly connected to the first rotating shaft 13 through the first transmission shaft 33 and The first rotating shaft 13 is driven to rotate, and the first blade 11 mounted on the first rotating shaft 13 is driven to rotate, and the food is fully crushed under the interaction of the first and

second blades

11 and 12 rotating coaxially.

In another specific embodiment, as shown in FIG. 3, the stator 211 is located outside the magnetoresistive rotor 212, the stator 211, the magnetoresistive rotor 212, and the permanent magnet rotor 213 are sequentially nested from the outside to the inside, and the magnetoresistive rotor 212 passes through the second transmission. The shaft 34 is fixedly connected to the second rotating shaft 14 and drives the second rotating shaft 14 to rotate, and then drives the second blade 12 mounted on the second rotating shaft 14 to rotate. The permanent magnet rotor 213 is directly fixedly connected to the first rotating shaft 13 and drives the first rotating shaft 13 to rotate. Then, the stirring claw 15 mounted on the first rotating shaft 13 is driven to rotate.

According to the cooking machine 1 of the present application, dual-mechanical pulverization of food is achieved in a non-mechanical differential and non-clutch manner, with high system integration, low energy consumption, and greatly reduced reliability due to the reduction of mechanical parts. In addition, the dual-shaft dual-power motor 21 uses a reluctance modulation effect to generate driving torque, and the torque density is higher than that of a conventional permanent magnet motor, which further increases the power density of the system and reduces energy consumption.

As shown in FIG. 1 to FIG. 3, in order to ensure smooth rotation of the first rotating shaft 13 and the second rotating shaft 14, a first bearing 31 is supported between the first rotating shaft 13 and the second rotating shaft 14, and outside the first rotating shaft 13 A second bearing 32 is supported between the container 10 and the base 20.

Further, the stator 211 may include one set of stator windings 2112 or two sets of stator windings 2112.

Specifically, the number of phases of the two sets of stator windings 2112 is the same or different. Therefore, the number of phases of the two sets of stator windings 2112 can be selected according to actual needs, thereby improving the practicability of the stator 211.

Advantageously, as shown in FIG. 4, when the stator 211 is located outside the magnetoresistive rotor 212, the stator 211 includes a stator housing 2113, and the stator housing 2113 is sleeved on the outside of the stator core 2111. The stator housing 2113 can face the stator. The iron core 2111 plays a protective and insulating effect, thereby improving the safety and reliability of the dual-shaft dual-power motor 21 during operation.

In some embodiments of the present application, as shown in FIG. 4, the magnetoresistive rotor 212 includes a magnetically conductive magnetoresistive core 2121 and a non-magnetically conductive spacer block 2122. The magnetoresistive core 2121 and the spacer block 2122 are alternately arranged in a ring shape Therefore, the structure of the reluctance rotor 212 can be simplified, and processing and manufacturing are facilitated.

In some embodiments of the present application, as shown in FIG. 4, the permanent magnet rotor 213 includes a permanent magnet core 2132 and a magnetic steel 2131, where the magnetic steel 2131 may include a plurality of magnetic steel 2131 along a circumference of the permanent magnetic core 2132. They are arranged at intervals, and the two adjacent magnetic steels 2131 have opposite polarities. Therefore, it is beneficial to realize the rotation of the permanent magnet rotor 213 and the stator 211 by electromagnetic induction.

In some embodiments of the present application, as shown in FIG. 4, the stator 211 includes a set of stator windings 2112, and the reluctance rotor 212 includes a magnetically permeable magnetic resistance core 2121 and a non-magnetically permeable spacer 2122, and the magnetic resistance core spacer blocks 2121 and 2122 the number of annular shape are alternately arranged, the iron core 2121 of the magnetoresistance p _r, winding the stator winding span y _1s 2112, and the number of pole pairs forming the rotating magnetic field, the permanent magnet rotor pole is formed on the p _s 213 Permanent magnetic field with the number p _f , where: p _r = | p _s ± p _f |; p _f ≠ p _s .

Further, the current injection frequency of the stator winding 2112 satisfies: ω _s = p _r Ω _r -p _f Ω _f , where ω _s is the control frequency of the stator winding 2112, and Ω _r and Ω _f are the reluctance rotor 212 and the permanent magnet, respectively. The mechanical rotation speed of the rotor 213 and the current injection phase angle of the stator winding 2112 satisfy: θ _s = -p _r θ _r + p _f θ _f , where θ _s is the phase angle of the injection current axis of the stator winding 2112, θ _f and θ _r The mechanical angle difference between the permanent magnet rotor 213 and the reluctance rotor 212 and the d-axis is respectively.

In other embodiments of the present application, the stator 211 includes two sets of stator windings 2112, which are respectively referred to as a first winding and a second winding, and the reluctance rotor 212 includes a magnetically conductive reluctance core 2121 and a non-magnetically conductive spacer block. 2122, and 2121 are alternately arranged reluctance core spacer block 2122 the number of annular shape, the reluctance of the iron core 2121 p _r, winding of the first stator winding span y _1s, and the formation of polar rotation number of p _s Magnetic field, the winding span of the second stator winding is y _1ad and forms a rotating magnetic field with a pole pair number p _ad , and the permanent magnet rotor 213 forms a permanent magnetic field with a pole pair number p _f , where: p _r = | p _s ± p _f |; p _ad = p _f ≠ p _s ; y _1s ≠ y _1ad .

Further, the current injection frequencies of the first winding and the second winding respectively satisfy: ω _s = p _r Ω _r- p _f Ω _f ; ω _ad = p _f Ω _f , where ω _s and ω _ad are the first winding and The control frequency of the second winding, Ω _r and Ω _f are the mechanical rotation speeds of the reluctance rotor 212 and the permanent magnet rotor 213, respectively; the current injection phase angles of the first winding and the second winding respectively satisfy: θ _s = -p _r θ _r + p _f θ _f ; θ _ad = -p _f θ _f , where θ _s and θ _ad are the phase angles of the injection current axis of the first winding and the second winding, respectively, and θ _f and θ _r are the permanent magnet rotors 213 and The difference in the mechanical angle between the reluctance rotor 212 and the d-axis alignment position is beneficial to the decoupling control of the reluctance rotor 212 and the permanent magnet rotor 213.

In other embodiments of the present application, as shown in FIGS. 5 and 6, the stator 211 is provided between the first rotor 214 and the second rotor 215. The stator 211 includes a stator core 2111 and two sets of stator windings 2112. The sets of stator windings 2112 are wound on the stator core 2111, and the two sets of stator windings 2112 correspond to the first rotor 214 and the second rotor 215 to drive the first rotor 214 and the second rotor 215 to rotate independently, in other words, The two sets of stator windings 2112 are referred to as a first stator winding and a second stator winding, respectively. The first stator winding corresponds to the first rotor 214, the second stator winding corresponds to the second rotor 215, and the first stator winding is driven independently. The first rotor 214 rotates, and the second stator winding independently drives the second rotor 215 to rotate.

The two sets of stator windings 2112 are used to independently drive the first rotor 214 and the second rotor 215 to rotate, so as to achieve the second rotating shaft 14 (or the first rotating shaft 13) fixedly connected to the first rotor 214 and the second rotor 215 fixedly connected. The first rotating shaft 13 (or the second rotating shaft 14) independently rotates, so that the first blade 11 and the second blade 12 can be rotated at different or the same rotation speed and different or the same direction.

In some embodiments of the present application, as shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 5, the first cutter includes one or more groups of first blades 11, and the second cutter includes one or more groups of second blades. 12. The first blade 11 and the second blade 12 may be one or more groups. The second blade 12 is inclined downward, the first blade 11 is inclined upward, and a crushing area is formed between the second blade 12 and the first blade 11. The crushed food is placed in the inner cavity of the container 10, and the crushed area formed between the second blade 12 and the first blade 11 of the food to be crushed is fully crushed multiple times.

In a specific embodiment, as shown in FIG. 5, the first cutter includes two sets of first blades 11 and the second cutter includes a set of second blades 12. The food to be crushed is formed between the second blade 12 and the first blade 11. The pulverizing area is fully pulverized many times.

In some embodiments of the present application, the rotation directions of the first rotating shaft 13 and the second rotating shaft 14 are opposite, and the first rotating shaft 13 drives the first blade 11 to rotate at a high speed. The first blade 11 plays a role of crushing food and generating spiral slip. The second rotating shaft 14 drives the second blade 12 to rotate at a high speed, and functions to pulverize the food and spoil the reflected swirl. The pulverizing area formed by the food to be pulverized between the second blade 12 and the first blade 11 is fully pulverized multiple times to improve the pulverization. Efficiency and crushing effect.

Of course, the rotation directions of the first rotation shaft 13 and the second rotation shaft 14 may be the same, and the rotation speeds of the two rotation shafts may be the same or different.

In some embodiments of the present application, the first cutter and / or the second cutter may be a stirring claw or a stirring rod, and the food to be crushed is stirred uniformly under the action of the stirring claw or the stirring rod.

In a specific embodiment, as shown in FIG. 3, the first cutter is a stirring claw 15 or a stirring rod, and the second cutter is a stirring blade, so that the food to be crushed is crushed by the stirring blade, and the food to be crushed is crushed by the stirring claw 15 or the stirring rod. The food is stirred evenly, thereby improving the crushing efficiency and crushing effect.

The cooking machine 1 of the present application adopts a dual-rotation shaft and dual-power rotation structure. The first rotation shaft 13 drives the first blade 11 to rotate at a high speed. The first blade 11 plays a role of pulverizing food and generates spiral slip, and the second rotation shaft 14 drives the second blade 12 at high speed. Rotate, play the role of pulverizing food and turbulent reflection swirl. The pulverizing area formed between the second blade 12 and the first blade 11 by the food to be pulverized is fully pulverized multiple times to improve the pulverization efficiency and pulverization effect, and obtain high nutritional value. At the same time, compared with the existing single-blade wall-breaking cooking machine, the speed of the blade can be reduced by half to achieve a good crushing effect, reducing the performance requirements of the motor, while the motor is running at a relatively low speed, and its service life and structure are stable. Both are beneficial; at the same time, compared with the existing two-motor axial output series with dual speeds, the axial height, weight and cost of the cup holder (that is, the base) are reduced; secondly, no mechanical differential and no clutch The method realizes dual power crushing food, high system integration, low energy consumption, and greatly improved reliability due to the reduction of mechanical parts.

In the description of this application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are for convenience only. This application and simplified description are not intended to indicate or imply that the device or unit referred to must have a specific orientation, construction and operation in a specific orientation, and therefore should not be construed as a limitation on this application.

In the description of this application, the terms "connected", "connected", "fixed", etc. should be understood in a broad sense unless otherwise specified and limited. For example, "connected" may be fixed or removable Connected, or integrated, or electrically; either directly or indirectly through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the descriptions of the terms “one embodiment”, “some embodiments”, “specific embodiments” and the like mean that specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in this application In at least one embodiment or example. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A cooking machine including:

A base inside which a motor is installed, and the motor is connected with a first rotating shaft and a second rotating shaft; and

A container is installed above the base for placing food to be pulverized. The first rotating shaft and the second rotating shaft both extend into the inner cavity of the container. A first cutter is mounted on the first rotating shaft, and the first A second cutter is mounted on the two rotating shafts;

Wherein, the motor includes a stator, a first rotor, and a second rotor, the stator, the first rotor, and the second rotor are nested with each other, and the stator, the first rotor, and the second rotor Each adjacent two of the rotors are spaced by an air gap, the first rotor and the second rotor rotate independently of each other, and one of the first rotor and the second rotor is fixed to the first rotating shaft And the other of the first rotor and the second rotor is fixedly connected to the second rotating shaft.
The cooking machine according to claim 1, wherein:

The first rotating shaft is a hollow shaft, the second rotating shaft protrudes upward through a hollow portion in the middle of the first rotating shaft, and the first rotating shaft and the second rotating shaft rotate coaxially.
The cooking machine according to claim 1, wherein:

The stator includes a stator core and a stator winding, and the stator winding is wound on the stator core, wherein the stator includes one set of stator windings or two sets of stator windings.
The cooking machine according to claim 3, wherein

The stator further includes a stator casing, which is sleeved on the outside of the stator core.
The cooking machine according to any one of claims 1 to 4, wherein:

The stator, the first rotor, and the second rotor are sequentially nested from the inside to the outside or from the outside to the inside.
The cooking machine according to claim 5, wherein:

The first rotor is a reluctance rotor, and the second rotor is a permanent magnet rotor.
The cooking machine according to claim 6, wherein:

The magnetoresistive rotor includes a magnetically conductive magnetically resistive iron core and a non-magnetically conductive spacer block, and the magnetically resistive iron core and the spacer block are alternately arranged in a ring shape.
The cooking machine according to claim 7, wherein:

The permanent magnet rotor includes a permanent magnet core and a magnetic steel, and the magnetic steel includes a plurality of spaces arranged along a circumferential direction of the permanent magnetic core, and two adjacent magnetic steels have opposite polarities.
The cooking machine according to claim 8, wherein:

The stator includes a stator core and wound on the stator core, a stator winding, the core reluctance is the number p r, a winding of the stator winding span y 1s, and forming electrode The logarithm is a rotating magnetic field of p s , and the permanent magnet rotor forms a permanent magnet magnetic field with a pole number of p f , where:

p r = | p s ± p f |; p f ≠ p s .
The cooking machine according to claim 9, wherein:

The current injection frequency of the stator winding satisfies: ω s = p r Ω r- p f Ω f , where ω s is the control frequency of the stator winding, and Ω r and Ω f are the mechanical rotation speeds of the reluctance rotor and the permanent magnet rotor, respectively. ;

The current injection phase angle of the stator winding satisfies: θ s = -p r θ r + p f θ f , where θ s is the phase angle of the injection current axis of the stator winding, and θ f and θ r are the permanent magnet rotor and The mechanical angle of the reluctance rotor is aligned with the d-axis.
The cooking machine according to claim 8, wherein:

The stator includes a stator core and two sets of stator windings wound on the stator core. The number of the magnetoresistive cores is pr , and the winding spans of the two sets of stator windings are y 1s and y 1ad, and a rotating magnetic field formed on the pole number p s and p ad of the permanent magnetic field of the permanent magnet rotor is formed to the pole number p f, wherein:

p r = | p s ± p f |; p ad = p f ≠ p s ; y 1s ≠ y 1ad .
The cooking machine according to claim 11, wherein:

The current injection frequencies of the two sets of stator windings satisfy: ω s = p r Ω r -p f Ω f ; ω ad = p f Ω f , where ω s and ω ad are the control frequencies of the two sets of windings, Ω r and Ω f are the mechanical speeds of the reluctance rotor and permanent magnet rotor, respectively;

The current injection phase angles of the two sets of stator windings respectively satisfy: θ s = -p r θ r + p f θ f ; θ ad = -p f θ f , where θ s and θ ad are the injections of the two sets of windings, respectively. The phase angle of the current axis, θ f and θ r are the mechanical angle differences between the permanent magnet rotor and the reluctance rotor aligned with the d-axis, respectively.
The cooking machine according to any one of claims 1 to 4, wherein:

The stator is provided between the first rotor and the second rotor, the stator includes a stator core and two sets of stator windings, and the two sets of stator windings are both wound on the stator core, and The two sets of stator windings respectively correspond to the first rotor and the second rotor to independently drive the first rotor and the second rotor to rotate.
The cooking machine according to any one of claims 1 to 4, wherein:

The first cutter includes one or more sets of first blades, the second cutter includes one or more sets of second blades, and the second blade is inclined downward, the first blade is inclined upward, and A crushing area is formed between the second blade and the first blade.
The cooking machine according to any one of claims 1 to 4, wherein:

The first cutter and / or the second cutter is a stirring claw or a stirring rod, and the stirring claw or the stirring rod is used to stir the food to be crushed evenly.