CN215344145U

CN215344145U - Counter-rotating motor and food processor

Info

Publication number: CN215344145U
Application number: CN202120623743.XU
Authority: CN
Inventors: 刘毅; 赵建兴; 王飞
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-12-28
Anticipated expiration: 2031-03-26

Abstract

The application discloses a counter-rotating motor and a food processor, wherein the counter-rotating motor comprises a disc-type stator, a first stator structure and a second stator structure which are arranged in a back-to-back mode; a first winding is wound on the first stator structure, and a second winding is wound on the second stator structure; the phase sequence of the first winding is opposite to that of the second winding; an inverter connected in parallel with the first winding and the second winding to synchronously supply excitation current to the first winding and the second winding; the first disc type rotor is arranged on one side of the first stator structure and used for rotating along a first direction under the action of the first winding; and the second disc rotor is arranged on one side of the second stator structure and used for rotating in a second direction opposite to the first direction under the action of the second winding. According to the motor, the low-cost rotor can rotate in the same direction and in different directions, and the motor can be thinned.

Description

Counter-rotating motor and food processor

Technical Field

The application relates to the field of motors, in particular to a counter-rotating motor and a food processor

Background

In the electric appliances which are commonly used in the market and need stirring, the electric appliances are stirred by adopting the relative rotation of double output shafts, so that a better stirring effect can be realized. The electric appliance generally adopts a counter-rotating motor, but the conventional counter-rotating motor drives two rotating shafts to rotate in opposite directions through an electric brush slip ring at present, but the noise and the abrasion of an electric brush are large, so that the service life of the electric motor is influenced; the double-rotor permanent magnet motor respectively controls two sets of stators and rotors through two sets of inverters to realize reverse rotation, and although electric brushes are omitted, the inverters are high in cost, complex in control and large in occupied space.

SUMMERY OF THE UTILITY MODEL

The application provides a counter-rotating motor and food processor to it is big to solve counter-rotating motor noise among the prior art, controls technical problem such as complicated, bulky.

In order to solve the above technical problem, a technical scheme that this application adopted provides a counter-rotating machine, and counter-rotating machine includes: the disc type stator comprises a first stator structure and a second stator structure which are arranged in a back-to-back mode; a first winding is wound on the first stator structure, and a second winding is wound on the second stator structure; the phase sequence of the first winding is opposite to that of the second winding; an inverter connected in parallel with the first winding and the second winding to synchronously supply excitation current to the first winding and the second winding; the first disc type rotor is arranged on one side of the first stator structure and used for rotating along a first direction under the action of the first winding; and the second disc rotor is arranged on one side of the second stator structure and used for rotating in a second direction opposite to the first direction under the action of the second winding.

The first winding comprises a plurality of groups of first three-phase windings with the same phase sequence, the second winding comprises a plurality of groups of second three-phase windings with the same phase sequence, and the phase sequence of the first three-phase windings is opposite to that of the second three-phase windings.

The first three-phase winding comprises an A-phase winding, a B-phase winding and a C-phase winding which are sequentially arranged along a counterclockwise direction, and the second three-phase winding comprises an A-phase winding, a C-phase winding and a B-phase winding which are sequentially arranged along a counterclockwise direction.

The inverter comprises a first current output end, a second current output end and a third current output end, wherein A-phase windings of the first winding and the second winding are connected to the first current output end in parallel, B-phase windings of the first winding and the second winding are connected to the second current output end in parallel, and C-phase windings of the first winding and the second winding are connected to the third current output end in parallel.

The first winding and the second winding are both concentrated windings; or the first winding and the second winding are both distributed windings; or one of the first winding and the second winding is a concentrated winding, and the other is a distributed winding.

One of the first disc rotor and the second disc rotor is a first disc squirrel cage rotor, and the other one of the first disc rotor and the second disc rotor is a second disc squirrel cage rotor, a disc permanent magnet rotor or a disc reluctance rotor.

The inverter performs closed-loop vector control on the second disc type squirrel cage rotor, the disc type permanent magnet rotor or the disc type magnetic resistance rotor, and the first disc type squirrel cage rotor automatically operates in a V/F open-loop control mode.

The contra-rotating motor further comprises a magnetic isolation barrier, wherein the magnetic isolation barrier is arranged between the first stator structure and the second stator structure and is used for magnetically isolating the first winding from the second winding.

Wherein the disc stator, the first disc rotor and the second disc rotor are coaxially arranged.

For solving above-mentioned technical problem, a technical scheme that this application adopted provides a food processor, including the aforesaid counter-rotating motor.

Wherein, food processor still includes first blade and second blade, and first blade is connected with the output shaft of first disk rotor, and the output shaft of second blade and second disk rotor to but make first blade and second blade relative rotation.

Wherein, food processor includes: the base forms an accommodating cavity, and a counter-rotating motor is arranged in the accommodating cavity; a groove is formed on the surface of the base, and an output shaft of the counter-rotating motor extends out of the groove; the cup can be dismantled and set up in the recess, and first blade and second blade set up in the cup, and pass the cup and connect in the output shaft.

Wherein, be provided with the grafting structure in the recess, the grafting structure is including the grafting arch that forms at the recess bottom to and the grafting gum cover of cover setting on grafting arch.

The motor comprises a motor accommodating cavity, a control accommodating cavity, a counter-rotating motor, a baffle plate, a motor, a control assembly and a motor control assembly, wherein the baffle plate is arranged in the accommodating cavity so as to divide the accommodating cavity into the motor accommodating cavity and the control accommodating cavity; a first vent is formed at one end, far away from the motor accommodating cavity, of the cavity of the control accommodating cavity, and a second vent is formed at one end, far away from the control accommodating cavity, of the cavity of the motor accommodating cavity; the baffle is provided with a through hole, wherein the air flowing into the motor accommodating cavity from the first ventilation opening is controlled by the through hole to enter the motor accommodating cavity, or the air flowing into the motor accommodating cavity from the second ventilation opening is controlled by the through hole to enter the motor accommodating cavity.

The base comprises an upper shell and a lower shell, wherein a groove is formed in the upper shell, a drainage hole channel is formed in the groove, a drainage hole is formed in the bottom wall of the lower shell, and the drainage hole channel is communicated with the drainage hole; the cross section of the drainage hole channel vertical to the drainage direction is the same as the shape of the drainage hole, and the drainage hole is in a drop shape.

This application is whole for the disk to the rotating-electric machine, including the first stator structure and the second stator structure that set up back to the back in the disk stator to set up the opposite first winding of phase sequence and second winding, and through one set of dc-to-ac converter synchronous control first winding and second winding, can save the brush, the noise reduction improves the motor life-span, owing to need not two sets of dc-to-ac converters simultaneously, its cost is lower, and control is simpler. And adopt the stator rotor structure of disk for the motor can realize thinization design.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic view of a counter-rotating machine according to the present application;

FIG. 2 is a schematic view of a control principle of the counter motor shown in FIG. 1;

FIG. 3 is a schematic structural view of a disc stator in the embodiment of the dynamo-electric machine shown in FIG. 1;

FIG. 4 is a schematic diagram of the arrangement of windings on the disk stator of FIG. 3;

FIG. 5 is another schematic structural view of a disc stator in the embodiment of the counter-rotating machine shown in FIG. 1;

6-8 are schematic structural views of the disc type squirrel cage rotor in the present application;

FIG. 9 is a schematic structural view of a disk-type permanent magnet rotor of the present application;

FIG. 10 is a schematic structural diagram of an embodiment of a food processor of the present application;

FIG. 11 is an exploded schematic view of the food processor of the present application;

FIG. 12 is a partial cross-sectional view of FIG. 11;

FIG. 13 is a schematic view of the structure of A shown in FIG. 12;

FIG. 14 is a front view of the lower housing of FIG. 11;

FIG. 15 is a rear schematic view of the upper housing of FIG. 11;

FIG. 16 is a schematic view of the structure of B shown in FIG. 12;

FIG. 17 is a schematic view of the structure of C shown in FIG. 14;

FIG. 18 is a schematic view of D shown in FIG. 15;

FIG. 19 is a rear view of the lower housing of FIG. 11;

fig. 20 is a top view of the upper housing shown in fig. 11.

Fig. 21 is a schematic view showing the structure of the drain hole shown in fig. 20.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, fig. 1 is a schematic view illustrating a structure of a counter-rotating machine according to the present application, and fig. 2 is a schematic view illustrating a control principle of the counter-rotating machine illustrated in fig. 1. The counter-rotating motor 141 of the present embodiment includes a disc stator 81, an inverter 82, a first disc rotor 83, and a second disc rotor 84.

In the embodiment, the stator and the rotor are both disc type, and the disc type rotor covers the disc type stator, so that the light and thin design can be realized. The structure of the disc stator 81 in the present embodiment can refer to fig. 3 and 3, and fig. 3 is a schematic structural diagram of the disc stator in the counter-rotating electric machine embodiment shown in fig. 1; fig. 3 is a schematic view of a structure in which a winding is provided on the disc stator shown in fig. 1.

The opposite surfaces of the disc stator 81 are respectively provided with a first stator structure 811 and a second stator structure 812, that is, the first stator structure 811 and the second stator structure 812 are arranged oppositely. Two corresponding rotors are respectively arranged through the two stator structures, so that a double-rotor motor is realized, and the counter-rotating motor 141 is realized through corresponding control.

The first winding 851 is wound on the first stator structure 811, the second winding 852 is wound on the second stator structure 812, and the phase sequence of the first winding 851 is opposite to that of the second winding 852, so that the two windings can enable the corresponding rotors to rotate in different directions under the action of one inverter 82.

In the disc stator 81 of this embodiment, the first winding 851 wound on the first stator structure 811 is a concentrated winding, the second winding 852 wound on the second stator structure 812 is a distributed winding, or the first winding 851 is a distributed winding, the second winding 852 is a concentrated winding, or both of them are distributed windings and are concentrated windings. Since the two stator structures correspond to different rotation directions of the rotor, the first stator structure 811 and the second stator structure 812 are different in this embodiment for the convenience of distinction.

For example, if the first winding 851 is a concentrated winding and the second winding 852 is a distributed winding, the first stator structure 811 and the second stator structure 812 are different in that the stator yoke width of the first stator structure 811 corresponding to the concentrated winding is larger than the stator yoke width of the second stator structure 812 corresponding to the distributed winding.

Further, the first stator structure 811 and the second stator structure 812 may be designed as a single body, i.e., the disc stator 81 is a single body; or a split design, in which case, a magnetic barrier 813 may be disposed between the first stator structure 811 and the second stator structure 812 to isolate the first winding 851 and the second winding 852, so as to avoid mutual interference of magnetic fields generated by the two windings. Referring to fig. 5, fig. 5 is another schematic structural diagram of the disc stator in the embodiment of the electric rotating machine shown in fig. 1.

The inverter 82 in this embodiment is connected in parallel with the first winding 851 and the second winding 852 to synchronously supply excitation currents to the first winding 851 and the second winding 852. Wherein the first windings 851 comprise a plurality of sets of first three-phase windings having the same phase sequence and the second windings 852 also comprise a plurality of sets of second three-phase windings having the same phase sequence, wherein the phase sequences of the first three-phase windings and the second three-phase windings are opposite.

The first three-phase winding comprises an A-phase winding, a B-phase winding and a C-phase winding which are sequentially arranged along a counterclockwise direction, and the corresponding second three-phase winding comprises an A-phase winding, a C-phase winding and a B-phase winding which are sequentially arranged along a counterclockwise direction.

In this regard, the first current output terminal 821, the second current output terminal 822, and the third current output terminal 823 of the inverter 82 are respectively connected to the three-phase windings. The a-phase windings of the first winding 851 and the second winding 852 are connected in parallel to the first current output terminal 821, the B-phase windings of the first winding 851 and the second winding 852 are connected in parallel to the second current output terminal 822, and the C-phase windings of the first winding 851 and the second winding 852 are connected in parallel to the third current output terminal 823.

With the inverter 82 providing the excitation current synchronously, the two windings can drive the two rotors to rotate in different directions respectively.

Referring to fig. 6-8 and 9 for the rotor in the present embodiment, fig. 6-8 are schematic structural views of the disc-type cage rotor shown in fig. 1; fig. 9 is a schematic structural view of the disc type permanent magnet rotor shown in fig. 1.

Wherein the disc squirrel cage rotor 860 is formed by squirrel cage bars 861 placed in a slotted rotor yoke 862; disc permanent magnet rotor 870 is formed by permanent magnets 871 affixed in permanent magnet rotor yoke 872.

The first disc rotor 83 is arranged on one side of the first stator structure 811 and rotates in a first direction by the first windings 851, and the second disc rotor 84 is arranged on one side of the second stator structure 812 and rotates in a second direction by the second windings 852, the first direction being opposite to the second direction.

In this embodiment, the first disc rotor 83 and the second disc rotor 84 are respectively disposed on two sides of the disc stator 81, so that the problem of unbalanced magnetic tension on one side is avoided. Further, the disc stator 81, the first disc rotor 83 and the second disc rotor 84 are coaxially arranged, so that the problem of unbalanced magnetic tension can be reduced.

One of the first disc rotor 83 and the second disc rotor 84 is a first disc squirrel cage rotor, and the other is a second disc squirrel cage rotor, a disc permanent magnet rotor, or a disc reluctance rotor. The inverter 82 performs closed loop vector control on the second disc squirrel cage rotor, the disc permanent magnet rotor, or the disc reluctance rotor, while the first disc squirrel cage rotor automatically operates in a V/F open loop control mode.

Specifically, the closed-loop vector control is to control the rotation speed and the torque of the motor respectively, and can generate output voltages matched with different loads according to the received feedback signals. The V/F open loop control means that the ratio of the output voltage V to the operating frequency F is a constant value, and it cannot receive a feedback signal, so its output voltage is not affected by the load.

In the present embodiment, the squirrel cage rotor generally corresponds to the distributed windings, and the concentrated windings generally correspond to the permanent magnet rotor or the reluctance rotor. Therefore, one setting manner in this embodiment is: the first stator structure 811 is provided with a concentrated winding, and the first disc rotor 83 is a disc permanent magnet rotor; distributed windings are provided on the second stator structure 812 and the second disc rotor 84 is a disc squirrel cage rotor. The inverter 82 performs closed-loop vector control on the first disc rotor 83, so that the second disc rotor 84 automatically operates in a V/F open-loop control mode.

In the embodiment of the present application, one of the first disc rotor 83 and the second disc rotor 84 is set as the first squirrel cage rotor, so that the disadvantage that a dual-permanent-magnet rotor, a dual-reluctance rotor, or a dual-rotor motor with permanent magnets and reluctance matched with each other must be controlled by two sets of inverters can be avoided, and the control of the two rotors is realized by one set of inverters.

Specifically, a power supply (not shown in the figure) supplies power to the first winding 851 and the second winding 852 simultaneously through the inverter 82, the first winding 851 generates a first magnetic field under the action of excitation current, the disc-type permanent magnet rotor is driven to rotate in a first direction, for example, the first direction can be a clockwise direction in the embodiment, the voltage and the frequency of the first winding 851 gradually increase, the rotating speed of the disc-type permanent magnet rotor gradually increases, and the inverter 82 precisely controls the speed or the torque of the disc-type permanent magnet rotor by precisely controlling the output voltage, the output current and the output frequency of the first winding 851, so as to realize the closed-loop vector control of the first winding 851.

Meanwhile, the second winding 852 which is connected in parallel with the first winding 851 and the inverter 82 also receives the excitation current to generate a second magnetic field, and the phase sequence of the second winding 852 is opposite to that of the first winding 851, so that the disk-type squirrel cage rotor is driven by the second winding 852 to rotate in a second direction which is opposite to the first direction, for example, the second direction may be a counterclockwise direction in the embodiment, the voltage and the frequency of the second winding 852 are gradually increased, and the rotation speed of the disk-type squirrel cage rotor is gradually increased; when the inverter 82 realizes the closed-loop vector control on the first winding 851, the ratio of the output voltage to the output frequency is a constant value, so that the disc type squirrel-cage rotor can automatically operate in a V/F open-loop control mode. When the load of the disc type squirrel cage rotor is large, the disc type squirrel cage rotor is controlled by the disc type squirrel cage rotor, the running rotating speed of the disc type squirrel cage rotor is lower than the synchronous rotating speed of a magnetic field, and slip is generated, so that asynchronous electromagnetic torque matched with the load is generated, and the step-out risk is avoided.

The embodiment of the application sets two sets of windings and rotors for the rotating motor 141, synchronously controls the two windings through one set of the inverter 82, can save electric brushes, reduce noise and prolong the service life of the motor, and meanwhile, because two sets of the inverters 82 are not needed, the cost is lower, and the control is simpler. In addition, in the present embodiment, the rotating electric machine 141 is designed in a disk type, so that the structure is light and thin.

Compared with the prior art, this application is whole to the rotating electrical machines for the disk, including first stator structure and the second stator structure that sets up back to the back in the disk stator to set up first winding and the second winding that the phase sequence is opposite, and through first winding of one set of dc-to-ac converter synchronous control and second winding, can save the brush, the noise reduction improves the motor life-span, simultaneously owing to need not two sets of dc-to-ac converters, its cost is lower, and control is simpler. And a disc-type stator and rotor structure is adopted, so that the thinning design of the motor can be realized

Referring to fig. 10, fig. 10 is a schematic structural view of the application of the rotating electric machine to the food processor. The food processor 800 of the present embodiment includes a counter-rotating motor 141, a first blade 881 and a second blade 882, wherein the structure of the counter-rotating motor 141 is described in the above-mentioned counter-rotating motor 141 embodiment, and will not be described herein again, the first blade 881 is connected to an output shaft of a first disk rotor of the counter-rotating motor 141, and the second blade 882 is connected to an output shaft of a second disk rotor of the counter-rotating motor 141, so that the first blade 881 and the second blade 882 can rotate relatively. First blade 881, second blade 882 can be respectively along with the rotor relative rotation, and its relative rotational speed can reach the twice of single blade rotational speed to can carry out better processing to the food in the food processor 800. The number of the blades may be plural, and is not limited herein.

Referring further to fig. 11, fig. 11 is an exploded view of the food processor of the present application.

Food processor 800 still includes base 1 and cup 2 in this embodiment, and base 1 is formed with and holds chamber 13, holds and is provided with counter-rotating motor 141 in the chamber 13, is the disc because of counter-rotating motor 141, and its height dimension is less, and has reduced the base 1 height to reduce food processor overall height, and then reduced occupation space, be convenient for accomodate and be convenient for the user operation.

The surface of the base 1 is formed with a groove 111, and the groove 111 is convenient for a user to place or take off the cup body 2. An output connector 1411 of the counter-rotating motor 141 protrudes out of the groove 111. Wherein a first blade 881 and a second blade 882 are provided inside the cup body 2, and the first blade 881 and the second blade 882 are coupled to an output shaft inside the cup body 2 to perform a better processing of the food inside the cup body 1.

Specifically, an insertion structure (not shown) is arranged in the groove 111, and the insertion structure is connected with the cup body 2, and performs positioning insertion on the cup body 2 to limit the cup body 2 in the groove 111 and enable the cup body 2 to be in quick alignment connection with the output connector 1411; avoid food processor working process simultaneously, cup 2 takes place the offset because of base 1 vibrates, therefore above-mentioned food processor can be convenient for user operation, promotes the user and uses experience. The groove 111 may be any shape, and the cup body 2 may be any shape as long as the cup body 2 can be detached from the groove 111, which is not limited herein.

Furthermore, the inserting structure is an elastic inserting structure (not shown in the figure), the elastic inserting structure has certain elasticity, and the buffering and vibration reduction effects are achieved in the connecting process of the elastic inserting structure and the cup body 2.

Specifically, the elastic plug structure includes a plug protrusion 112 and a plug rubber 142, the plug protrusion 112 is formed at the bottom of the groove 111 to limit the cup body 2 in the groove 111 by the plug protrusion 112, so that the cup body 2 is connected with the output connector 1411 of the counter-rotating motor 141 more quickly. In addition, the plug-in rubber sleeve 142 is sleeved on the plug-in protrusion 112, and a rubber sleeve protrusion (not shown) having a shape corresponding to the plug-in protrusion 112 is formed on the plug-in rubber sleeve 142, wherein the rubber sleeve protrusion positions the cup body 2, and the cup body 2 is limited in the groove 111. Meanwhile, the plug rubber sleeve 142 can play a role in vibration reduction and noise reduction so as to block the vibration of the base 1 from being transmitted to the cup body 2.

The number of the insertion protrusions 112 may be one or more, and the insertion protrusions 112 may have any shape. When the number of the insertion protrusions 112 is plural, the adjacent insertion protrusions 112 are spaced apart from each other, so that the cup body 2 is more stably placed in the groove 111. If the number of the inserting protrusions 112 is four in this embodiment, the inserting protrusions 112 are arranged in an arc shape, and the four inserting protrusions 112 are circularly distributed at the bottom of the groove 111. In order to further realize the stability of the connection between the cup body 2 and the base 1, the bottom of the cup body 2 is provided with an insertion groove 111 corresponding to the insertion protrusion 112, so that the insertion protrusion 112 is inserted into the insertion groove 111. Wherein the shape of the plugging recess 111 corresponds to the shape of the plugging protrusion 112.

Specifically, an output joint 1411 is provided on the output shaft of the counter-rotating motor 141, and during the connection of the cup body 2 and the output joint 1411, vibration of the base 1 may be transmitted to the cup body 2 through the output joint 1411, so in order to reduce the transmission of vibration, a shaft end rubber sleeve 143 is provided on the output joint 1411. The shaft end rubber sleeve 143 plays a role in vibration reduction, and the working stability of the counter-rotating motor 141 can be improved.

The plug rubber sleeve 142 and the shaft end rubber sleeve 143 can both play a role in damping vibration, for example, the plug rubber sleeve 142 and the shaft end rubber sleeve 143 can be made of rubber or plastic, and the plug rubber sleeve 142 and the shaft end rubber sleeve 143 can be made of the same material or different materials, which is not limited herein.

In an embodiment, the accommodating chamber 13 further includes a control assembly 15, and the control assembly 15 is connected to the counter-rotating motor 141 to control the operation of the counter-rotating motor 141 through the control assembly 15. Wherein, counter-rotating motor 141 and control assembly 15 set up side by side, and counter-rotating motor 141 and control assembly 15's array orientation is parallel with the surface of placing of base 1 to reduce base 1 height, thereby reduce food processor overall height.

Specifically, hold the chamber 13 and divide into motor and hold chamber 131 and control and hold chamber 132, and motor holds chamber 131 and control and holds chamber 132 and set up side by side, and the motor holds chamber 131 and control and holds chamber 132 array orientation and base 1's the surface of placing parallel. The counter-rotating motor 141 is located in the motor accommodating cavity 131, and the control assembly 15 is located in the control accommodating cavity 132, so that the counter-rotating motor 141 and the control assembly 15 are more compactly installed, and the height of the base 1 is reduced.

Referring to fig. 12 and 13, fig. 12 is a partial cross-sectional view of fig. 11; fig. 13 is a schematic view of a structure shown in fig. 12.

Further, referring to fig. 11, the control assembly 15 includes a fixing bracket 151, an operation plate 152, and a driving plate 153, wherein the fixing bracket 151 is used for fixing the operation plate 152 to the top wall of the control accommodating chamber 132. The driving plate 153 is connected to the bottom wall of the control accommodating chamber 132. Wherein, the operation board 152 is connected with the driving board 153 in a communication way, and the driving board 153 is electrically connected with the counter-rotating motor 141. The operation or the closing of the stirring member is controlled by controlling the operation panel 152 so that the driving panel 153 drives the counter-rotating motor 141 to operate or close.

In order to define the overall height of the control assembly 15, so as to make the structure inside the control accommodating chamber 132 in the base 1 more compact, the fixing frame 151, the operation plate 152 and the driving plate 153 are sequentially stacked in a direction perpendicular to the placement surface of the base 1, so as to reduce the overall height of the control assembly 15.

The fixing frame 151 and the operation panel 152 are connected in a clamping manner, so that the fixing frame and the operation panel can be conveniently detached. Optionally, a buckle is disposed on the periphery of the fixing frame 151 or the periphery of the operation plate 152, so as to be clamped on the corresponding operation plate 152 or the fixing frame 151 by the buckle. In this embodiment, the fixing frame 151 is provided with a plurality of fasteners at the periphery thereof, and the plurality of fasteners are fastened to the operation panel 152.

Optionally, the fixing frame 151 may be detachably mounted on the top wall of the control accommodating chamber 132, so as to facilitate mounting and dismounting of the fixing frame 151. Wherein the fixing frame 151 may be mounted to the top wall of the control accommodating chamber 132 by screws or the like. In addition, the driving board 153 is detachably mounted on the top wall of the control accommodating chamber 132, which facilitates the mounting and dismounting of the driving board 153. Wherein the driving plate 153 may be mounted on the bottom wall of the control accommodating chamber 132 by screws or the like.

In one embodiment, the base 1 includes an upper housing 11 and a lower housing 12, and the receiving cavity 13 is formed in a space defined by the upper housing 11 and the lower housing 12. The upper shell 11 and the lower shell 12 are detachably connected, so that the base 1 is convenient to mount and dismount, and the structure is simple. Wherein a groove 111 is formed on the upper case 11.

Optionally, one of the upper housing 11 and the lower housing 12 is provided with a screw post (not shown in the figure), and the other is provided with a screw hole (not shown in the figure), and the fixing post penetrates through the screw post and the screw hole to connect the upper housing 11 and the lower housing 12. The upper case 11 is provided with screw posts and the lower case 12 is provided with screw holes as in the present embodiment.

Referring to fig. 14 and 15, fig. 14 is a schematic front view of the lower housing shown in fig. 11; fig. 15 is a rear view of the upper housing shown in fig. 11.

In the practical process, referring to fig. 11, before the upper housing 11 and the lower housing 12 are installed, it is necessary to ensure the positioning between the upper housing 11 and the lower housing 12, and it is also necessary to ensure that the output connector 1411 of the electric rotating machine 141 extends out of the groove 111, so that in this embodiment, a limiting member (not shown in the figure) is disposed between the upper housing 11 and the lower housing 12, so as to limit the upper housing 11 and the lower housing 12 by the limiting member, which not only plays a role in positioning, but also facilitates the subsequent installation between the upper housing 11 and the lower housing 12.

The position-limiting member may be a first position-limiting post 114 and a second position-limiting post 124, wherein the first position-limiting post 114 forms a position-limiting hole, and the second position-limiting post 124 is inserted into the position-limiting hole of the first position-limiting post 114. The first position-limiting column 114 may be disposed on the upper casing 11 and/or the lower casing 12, and the second position-limiting column 124 may be disposed on the lower casing 12 and/or the upper casing 11, as long as the first position-limiting column 114 and the second position-limiting column 124 are connected in an aligned manner, which is not limited herein. In addition, the number of the first position-limiting columns 114 and the second position-limiting columns 124 is one or more, and the number can be determined according to actual situations.

With reference to fig. 11 and 14, during the operation of the base 1, since the base 1 forms a large amount of heat inside the rotating electric machine 141 and the control assembly 15 during the operation, the stability and reliability of the rotating electric machine 141 and the control assembly 15 may be affected by the large amount of heat accumulated in the accommodating cavity 13, and the service life of the base may be shortened.

Therefore, the accommodating chamber 13 in this embodiment is divided into a motor accommodating chamber 131 and a control accommodating chamber 132 by the baffle 16, a counter-rotating motor 141 is provided in the motor accommodating chamber 131, a control assembly 15 is provided in the control accommodating chamber 132, and the control assembly 15 is used for controlling whether the base 1 works or not. In order to simultaneously take away heat generated by the counter-rotating motor 141 and the control assembly 15, in the present embodiment, a first ventilation opening 121 is formed at one end of the cavity of the control accommodating cavity 132, which is far from the motor accommodating cavity 131, and a second ventilation opening 122 is formed at one end of the cavity of the motor accommodating cavity 131, which is far from the control accommodating cavity 132. Meanwhile, a through hole 161 is provided on the baffle plate 16, and the through hole 161 is used for wind flow to communicate the motor accommodating chamber 131 and the control accommodating chamber 132. That is, the through holes 161 formed through the first ventilation opening 121, the second ventilation opening 122 and the baffle 16 are matched with each other, so that the counter-rotating motor 141 and the control assembly 15 can be simultaneously cooled, and the cooling efficiency is improved.

In the heat dissipation process, one of the first and

second ventilation openings

121 and 122 is used for air intake, and the other is used for ventilation. When the first ventilation opening 121 is used for air intake, the air flowing into the control accommodating cavity 132 from the first ventilation opening 121 enters the motor accommodating cavity 131 through the through hole 161; when the second ventilation opening 122 is used for air intake, the air flowing into the motor accommodating chamber 131 from the second ventilation opening 122 enters the control accommodating chamber 132 through the through hole 161. The first ventilation opening 121 or the second ventilation opening 122 is used for air intake or air outtake, and may be determined according to actual conditions. In addition, the number of the first ventilation openings 121 may be one or more, and the number of the second ventilation openings 122 may be one or more, which may be determined according to the actual situation.

The baffle 16 is arranged in the accommodating cavity 13 to divide the accommodating cavity 13 into a motor accommodating cavity 131 and a control accommodating cavity 132, so as to respectively mount the counter-rotating motor 141 and the control assembly 15, and meanwhile, the situation that substances such as liquid and the like which enter the motor accommodating cavity 131 later carelessly enter the control accommodating cavity 132 to influence the use stability and reliability of the control assembly 15 can be prevented; the subsequent careless entering of the control accommodating cavity 132 into the motor accommodating cavity 131 can be prevented, and the use stability and reliability of the counter motor 141 and the like are prevented from being influenced. In addition, the number of the through holes 161 may be one, two or more, wherein the number of the through holes 161 may be determined according to practical situations and is not limited herein.

Because the counter-rotating motor 141 is arranged in a disc shape, the control assembly 15 is arranged in a plane shape as a whole, and in order to increase the air flow area, the air reaches the corners in the motor accommodating cavity 131 and the control accommodating cavity 132 as much as possible. Both ends of this embodiment baffle 16 on first direction all are provided with through-hole 161, through all setting up through-hole 161 at baffle 16 both ends, can disperse the wind that enters into in holding chamber 13, and then enlarge wind flow area to further promote the radiating efficiency. The first direction is a direction indicated by a double-headed arrow X shown in fig. 12.

Specifically, in order to increase the air intake or the air output, two first vents 121 may be disposed at the end of the control accommodating cavity 132 away from the baffle 16, wherein the two first vents 121 are disposed at intervals in the first direction, so that air is simultaneously taken in or blown out from two sides of the control accommodating cavity 132, and further the heat dissipation effect is improved. In addition, the orthographic projection of the second ventilation opening 122 on the baffle 16 is located between the two through holes 161, so that the wind flow path is relatively short, the accommodating cavity 13 is uniformly covered, the heat dissipation effect is better, and the wind resistance is relatively small.

In practice, the control assembly 15 generates more heat than the counter-rotating machine 141 due to its. Therefore, in order to further improve the heat dissipation effect, in this embodiment, the two first vents 121 are both air inlets, which not only increases the air inlet volume, but also can perform heat dissipation processing on the control assembly 15 at the same time; then, the air enters the motor accommodating cavity 131 through the through holes 161 at the two ends of the baffle 16, and the counter-rotating motor 141 is arranged in a disc shape, so that the second air vent 122 is defined as an air outlet, wherein the orthographic projection of the second air vent 122 on the baffle 16 is positioned between the two through holes 161, so that the air can flow along the periphery of the counter-rotating motor 141, and the heat of the counter-rotating motor 141 is taken away, and the heat dissipation efficiency is improved; at the same time, the wind flow path is also made relatively short and covers the accommodation chamber 13 uniformly. In practice, since the driving board 153 is the main heat source in the control module 15, the driving board 153 and the rotating electric machine 141 are substantially subjected to heat dissipation. The through hole 161 may be formed in the baffle 16, or may be formed by surrounding the baffle 16 and the accommodating chamber 13, which is not limited herein.

In order to make the internal structure of the base 1 more compact, in the process of installing the baffle 16 in the accommodating cavity 13, an avoiding groove 1611 is provided at one end of the through hole 161 close to the middle of the baffle 16, and the avoiding groove 1611 is used for avoiding a part of structure or a part of routing of the counter-rotating motor 141. The side of the through hole 161 away from the middle of the baffle 16 is provided with a flow channel 1612, and the flow channel 1612 is used for wind to pass through. In order to allow more wind to enter the motor accommodating chamber 131 and the control accommodating chamber 132 during the arrangement of the bypass groove 1611 and the circulation groove 1612, the depth of the circulation groove 1612 may be set to be lower than that of the bypass groove 1611 to allow more wind to pass therethrough.

In an embodiment, in combination with fig. 11 and 12, to further improve the efficiency of air intake or air outtake in the accommodating chamber 13. The accommodating cavity 13 is also internally provided with a fan assembly 144, and the fan assembly 144 is used for accelerating the flow rate of wind, so that the heat dissipation effect in the base 1 is improved. Wherein, the fan assembly 144 can be disposed at the first ventilation opening 121 or the second ventilation opening 122. When the first vent 121 is used for air intake, the fan assembly 144 may be disposed at the second vent 122, and the fan assembly 144 is used for air intake, so that the air entering the first vent 121 quickly exhausts the heat of the control assembly 15 and the counter-rotating motor 141 from the second vent 122. When the second ventilation opening 122 is used for air intake, the fan assembly 144 may be disposed at the first ventilation opening 121, and the fan assembly 144 is used for air intake, so that the air entering the second ventilation opening 122 will more quickly discharge the heat of the dynamo 141 and the control assembly 15 from the first ventilation opening 121.

In other embodiments, the fan assembly 144 may also blow air, and may be disposed at other positions as long as the air can be accelerated to flow at the first ventilation opening 121 and the second ventilation opening 122, which is not limited herein. In addition, the first ventilation opening 121 and the second ventilation opening 122 may be provided with one or more fan assemblies 144, and when there are a plurality of fan assemblies 144, the adjacent fan assemblies 144 are connected in series. Specifically, with reference to fig. 11 and 12, a plug-in groove 123 is disposed in the accommodating cavity 13 near the first ventilation opening 121 or the second ventilation opening 122, and the plug-in groove 123 is used for installing the fan assembly 144, wherein the fan assembly 144 is plugged in the plug-in groove 123, so as to facilitate installation and detachment of the fan assembly 144. In the installation process of the fan assembly 144, the central axis of the fan assembly 144 can be parallel to the placement surface of the base 1, so that the fan assembly 144 can suck or blow air in the forward direction, and the heat dissipation effect is further improved.

In one embodiment, with reference to fig. 11 and 12, the first and

second ventilation openings

121 and 122 are formed on the base 1. Wherein the base 1 includes an upper case 11 and a lower case 12, that is, the first ventilation opening 121 and the second ventilation opening 122 may be formed in the upper case 11, or the lower case 12, or between the upper case 11 and the lower case 12. In order to prevent foreign matters from entering the accommodating cavity 13 along with wind and affecting the normal use of the base 1; meanwhile, in order to improve the aesthetic appearance of the base 1, the first ventilation opening 121 and the second ventilation opening 122 are disposed on the sidewall of the lower housing 12 as in this embodiment. When the upper housing 11 and the lower housing 12 are installed, the first ventilation opening 121 and the second ventilation opening 122 can be hidden at the connection position of the two.

Referring to fig. 16, fig. 16 is a schematic structural diagram of B shown in fig. 12. With reference to fig. 11 and 15, the cup body 2 is placed in the upper groove 111 of the base 1, when the base 1 works, noise generated by the rotating motor 141 and the like in the base 1 is transmitted to the joint between the cup body 2 and the base 1 through the output joint 1411, and then noise is generated at the joint between the cup body 2 and the base 1, thereby affecting the user experience. Therefore, the upper housing 11 is provided with the noise reduction cavity structure 113, wherein the noise reduction cavity structure 113 is disposed around the groove 111, so that the noise reduction cavity structure 113 reduces the transmission of noise sound at the groove 111, thereby reducing the generation of noise and improving the user experience.

Specifically, the noise reduction cavity structure 113 is protruded at the periphery of the groove 111. In practice, in order to further increase the height of the noise reduction cavity structure 113, in this embodiment, a first extension portion 1131 is disposed on a side of the groove 111 close to the accommodating cavity 13, a second extension portion 1132 is disposed on a side of the upper shell 11 close to the accommodating cavity 13, and the extension directions of the first extension portion 1131 and the second extension portion 1132 are the same. I.e., the height of the noise reduction cavity structure 113 is increased by the first extension 1131 and the second extension 1132.

Further, in conjunction with fig. 15 and 16, in order to achieve the compactness of the base 1 structure, the groove 111 is provided at the end position of the upper casing 11, wherein the noise reduction cavity structure 113 near the second extension 1132 at the end of the upper casing 11 can directly share the sidewall of the upper casing 11, which not only achieves the compactness of the base 1, but also reduces the production cost.

Referring to fig. 17, 18, 19 and 20, fig. 17 is a schematic structural view of C shown in fig. 14; FIG. 18 is a schematic view of D shown in FIG. 15; FIG. 19 is a rear view of the lower housing of FIG. 11; fig. 20 is a top view of the upper housing shown in fig. 11.

When the base 1 is exposed to the external environment, water may inadvertently enter the base 1; or water and the like in the cup body 2 may be accidentally poured into the base 1 during the working process of the cup body 2 and the base 1, so that the water penetrates into the base 1 to damage the counter-rotating motor 141, the driving plate 153 and the like.

Therefore, in the embodiment, the groove 111 is formed in the upper housing 11, the upper drainage hole 115 is formed in the groove 111, the lower drainage hole 172 is formed in the bottom wall of the lower housing 12, and the drainage hole is communicated with the upper drainage hole 115 and the lower drainage hole 172, so that water in the groove 111 directly passes through the upper drainage hole 115 and the drainage hole and is discharged through the lower drainage hole 172, thereby preventing water from permeating into the base 1 to affect the structure of the counter-rotating motor 141 or the drive plate 153 in the base 1, and prolonging the service life of the product. The number of the drain holes and the lower drain holes 172 may be one or more, and the number thereof may be determined according to the actual situation.

Specifically, the cross section of the drainage channel perpendicular to the drainage direction is the same as the shape of the upper drainage holes 115 and the lower drainage holes 172, that is, the cross section of the drainage channel is the same as the shape of the upper drainage holes 115 and the lower drainage holes 172, so that the drainage speed in the drainage channel is uniform.

Further, the upper drainage holes 115 and the lower drainage holes 172 are both drop-shaped, wherein the drop-shaped lower drainage holes 172 can reduce the self-tension of water and increase the drainage speed. Since the cross-section of the drain hole is the same as the shape of the upper and lower drain holes 115 and 172, the cross-sectional shape of the drain hole may be a drop shape. In other embodiments, the upper drainage holes 115 and the lower drainage holes 172 may have other shapes as long as the drainage speed can be increased, and are not limited herein.

Specifically, when the upper drain hole 115 and the lower drain hole 172 are distributed in a droplet shape, the long axis direction of the upper drain hole 115 and the lower drain hole 172 is set along the extending direction of the side wall of the groove 111, so that water enters the side wall of the drain channel along the side wall of the groove 111, the gravity of the water is increased, and the drainage speed is accelerated. The major axis direction is the direction of the straight line with the longest distance between the upper drainage hole 115 and the lower drainage hole 172.

Referring to fig. 21, fig. 21 is a schematic structural view of the drain hole shown in fig. 20. The upper drainage hole 115 and the lower drainage hole 172 include a first circular hole 1721 and a second circular hole 1722, wherein the center of the first circular hole 1721 and the center of the second circular hole 1722 are located on the same straight line, and the outer surfaces of two sides of the first circular hole 1721 and the second circular hole 1722 are tangent to each other through a tangent line. Thus, the first circular hole 1721, the second circular hole 1722 and two tangent lines are arranged to form the drop-shaped lower drainage hole 172.

Specifically, a distance between a center of the first circular hole 1721 and a center of the second circular hole 1722 is greater than or equal to a sum of a radius of the first circular hole 1721 and a radius of the second circular hole 1722 to facilitate water drainage. The distance between the center of the first circular hole 1721 and the center of the second circular hole 1722 is related to the radius of the first circular hole 1721 and the radius of the second circular hole 1722, so the distance may be determined according to the radius of the first circular hole 1721 and the radius of the second circular hole 1722, and is not limited herein. First circular orifice 1721 and second circular orifice 1722 are tangentially disposed when a distance between a center of first circular orifice 1721 and a center of second circular orifice 1722 is equal to a sum of a radius of first circular orifice 1721 and a radius of second circular orifice 1722.

Further, the radius of the first circular holes 1721 is greater than or equal to 1mm, such as the radius of the first circular holes 1721 is 1mm, 2mm, 3mm, etc. The radius of the second circular apertures 1722 is greater than or equal to 2mm, such as the radius of the second circular apertures 1722 is 2mm, 3mm, 4mm, and so on. Assuming that the radius of the first circular hole 1721 is R1 and the radius of the second circular hole 1722 is R2, the distance between the center of the first circular hole 1721 and the center of the second circular hole 1722 is L, i.e., L ≧ R1+ R2, L can be 3mm, 4mm, 5mm, etc.

In an embodiment, referring to fig. 11, 17 and 18, the upper housing 11 and the lower housing 12 are formed with the receiving cavity 13, the upper housing 11 is provided with an upper drainage channel 116 at the groove 111, and the lower housing 12 is provided with a lower drainage channel 171, wherein the upper drainage channel 116 and the lower drainage channel 171 are communicated to form a drainage channel. Wherein the drain passage extends through the receiving cavity and is connected to the upper drain hole 115 and the lower drain hole 172, respectively. The upper and lower drain holes 116 and 171 are isolated from the receiving chamber 13 to prevent water or the like from penetrating into the receiving chamber 13. In addition, set up the drainage pore in holding chamber 13 for base 1 structure is compacter, and has promoted base 1 pleasing to the eye degree.

Optionally, the upper drainage channel 116 is inserted into the lower drainage channel 171, for example, the upper drainage channel 116 is inserted into the lower drainage channel 171. In addition, in order to improve the sealing property at the insertion position of the upper drain hole 116 and the lower drain hole 171, a sealing member or the like may be provided therebetween to prevent water or the like from penetrating into the receiving chamber 13.

Compared with the prior art, the embodiment of the application has the advantages that the two sets of matched windings and rotors are arranged through the counter-rotating motor in the food processor, the two sets of inverters are used for synchronously controlling the two windings, an electric brush can be omitted, noise is reduced, the service life of the motor is prolonged, meanwhile, the cost is lower due to the fact that two sets of inverters are not needed, and the control is simpler. Through setting up the blade of being connected with two rotors respectively for the relative speed of two blades reaches the twice of single blade rotational speed, can improve machining efficiency when not increasing the noise. Moreover, the embodiment adopts the disc design for the counter-rotating motor, so that the light and thin structure of the motor is realized, and the whole food processor is more portable.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A counter-rotating electric machine characterized by comprising:

the disc type stator comprises a first stator structure and a second stator structure which are arranged in a back-to-back mode; a first winding is wound on the first stator structure, and a second winding is wound on the second stator structure; the first winding and the second winding are opposite in phase sequence;

an inverter connected in parallel with the first and second windings to synchronously supply excitation current to the first and second windings;

the first disc type rotor is arranged on one side of the first stator structure and used for rotating along a first direction under the action of the first winding;

and the second disc rotor is arranged on one side of the second stator structure and used for rotating in a second direction opposite to the first direction under the action of the second winding.

2. The counter-rotating electric machine according to claim 1, characterized in that the first winding includes a plurality of sets of first three-phase windings having the same phase sequence, and the second winding includes a plurality of sets of second three-phase windings having the same phase sequence, the phase sequence of the first three-phase windings being opposite to the phase sequence of the second three-phase windings.

3. The counter-rotating electric machine according to claim 2, characterized in that the first three-phase winding includes an a-phase winding, a B-phase winding, and a C-phase winding arranged in a counterclockwise order, and the second three-phase winding includes an a-phase winding, a C-phase winding, and a B-phase winding arranged in a counterclockwise order.

4. The counter-rotating electric machine according to claim 3, characterized in that the inverter includes a first current output terminal, a second current output terminal, and a third current output terminal, wherein the A-phase windings of the first and second windings are connected in parallel to the first current output terminal, the B-phase windings of the first and second windings are connected in parallel to the second current output terminal, and the C-phase windings of the first and second windings are connected in parallel to the third current output terminal.

5. The counter-rotating electric machine according to claim 1, characterized in that the first winding and the second winding are both concentrated windings; or the first winding and the second winding are both distributed windings; or one of the first winding and the second winding is a concentrated winding, and the other one is a distributed winding.

6. The counter-rotating electrical machine according to claim 1, wherein one of the first and second disc rotors is a first disc squirrel cage rotor and the other is a second disc squirrel cage rotor, a disc permanent magnet rotor, or a disc reluctance rotor.

7. The electric machine of claim 6, wherein the inverter performs closed-loop vector control of the second disc squirrel cage rotor, disc permanent magnet rotor, or disc reluctance rotor, while the first disc squirrel cage rotor automatically operates in a V/F open-loop control mode.

8. The counter-rotating electrical machine according to claim 1, further comprising a magnetic-isolation barrier disposed between the first stator structure and the second stator structure for magnetically isolating the first winding from the second winding.

9. The counter-rotating electric machine according to claim 1, characterized in that the disc stator, the first disc rotor, and the second disc rotor are coaxially disposed.

10. A food processor comprising the counter-rotating motor according to any one of claims 1 to 9.

11. The food processor of claim 10, further comprising a first blade coupled to the output shaft of the first disc rotor and a second blade coupled to the output shaft of the second disc rotor such that the first and second blades are relatively rotatable.

12. The food processor of claim 11, wherein the food processor comprises:

the base forms an accommodating cavity, and the counter-rotating motor is arranged in the accommodating cavity; a groove is formed on the surface of the base, and an output shaft of the counter-rotating motor extends out of the groove;

the cup body is detachably arranged in the groove, and the first blade and the second blade are arranged in the cup body and penetrate through the cup body to be connected to the output shaft.

13. The food processor of claim 12, wherein the groove is provided with an insertion structure therein, the insertion structure comprises an insertion protrusion formed at the bottom of the groove, and an insertion rubber sleeve sleeved on the insertion protrusion.

14. The food processor of claim 12, wherein a baffle is disposed in the accommodating cavity to divide the accommodating cavity into a motor accommodating cavity and a control accommodating cavity, the counter-rotating motor is disposed in the motor accommodating cavity, and the control accommodating cavity is provided with a control assembly;

a first vent is formed at one end, far away from the motor accommodating cavity, of the cavity of the control accommodating cavity, and a second vent is formed at one end, far away from the control accommodating cavity, of the cavity of the motor accommodating cavity; the baffle is provided with a through hole, wherein the air flowing into the control accommodating cavity from the first ventilation opening enters the motor accommodating cavity through the through hole, or the air flowing into the motor accommodating cavity from the second ventilation opening enters the control accommodating cavity through the through hole.

15. The food processor of claim 12, wherein the base comprises an upper shell and a lower shell, the upper shell is formed with a groove, the groove is formed with an upper drainage hole, the bottom wall of the lower shell is formed with a lower drainage hole, and the upper drainage hole and the lower drainage hole are communicated with a drainage hole;

the cross section of the drainage hole channel perpendicular to the drainage direction is the same as the drainage hole in shape, and the drainage hole is in a drop shape.