A ventilation-cooled permanent magnet synchronous motor and an energy-saving cook machine

Abstract

The present invention discloses a ventilation-cooled permanent magnet synchronous motor and an energy-saving chef machine, belonging to the technical field of permanent magnet synchronous motors. It includes a housing, and a regulation and connection assembly is arranged on the housing. The regulation and connection assembly includes a cushion plate installed in the housing through bolts. A support ring is sleeved on the top of the cushion plate. A plurality of limit grooves are distributed on the support ring, and electromagnetic shielding blocks for electromagnetic shielding are embedded in each limit groove. Through the electromagnetic shielding blocks each installed on the support ring, the present invention realizes the function of shielding the electromagnetic field, avoiding magnetic force leakage, which causes uneven action of the rotor by the electromagnetic field and affects torque and stability. The support frame and the winding converge or diverge towards the axis of the rotor, thereby realizing the adjustment of the range of the rotating magnetic field generated by the energization of the winding, and can change the direction and intensity of the magnetic field, facilitating the concentration of the rotating magnetic field on the rotor, and significantly improving the torque density and efficiency of the rotor.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet synchronous motors, and particularly to a ventilation-cooled permanent magnet synchronous motor and an energy-saving cook machine. Background Art

[0002] In recent years, permanent magnet synchronous motors have been widely used in various fields due to their advantages such as high torque and power density, small volume and light weight, high efficiency, and low rotor electromechanical time constant. When a cook machine is working, it will generate a certain amount of noise. Due to the low-noise characteristic of the permanent magnet synchronous motor, it can significantly reduce the running noise of the cook machine and improve the user experience. The high efficiency of the permanent magnet synchronous motor means that at the same power, it can provide more torque and power, making the cook machine more relaxed and efficient during operations such as stirring and kneading dough.

[0003] Among them, the patent with the publication number CN217769638U discloses a permanent magnet synchronous motor and its rotor. Each group of pole slots is divided into two inner pole slots located in the inner layer and one outer pole slot located in the outer layer along the radial direction of the rotor iron core sheet; two of each group of permanent magnets are the first permanent magnets, and the other one is the second permanent magnet. After the first permanent magnets are combined with the inner pole slots, the two first permanent magnets are arranged in a V shape, and there is a magnetic pole direct axis that is axisymmetric with respect to the two first permanent magnets between the two first permanent magnets. At least one end of the inner pole slot extends to form a magnetic isolation slot located outside the first permanent magnet; after the second permanent magnet is combined with the outer pole slot, the symmetry axis of the second permanent magnet itself coincides with the magnetic pole direct axis, and the distance between the second permanent magnet and the outer peripheral surface of the rotor iron core sheet is less than the distance between the first permanent magnet and the outer peripheral surface of the rotor iron core sheet.

[0004] When this structure is in use, the arrangement of the first permanent magnet and the second permanent magnet forms a "V + one" structure for the two first permanent magnets and one second permanent magnet. It improves the saliency ratio, reduces the amount of permanent magnets, can reduce the back electromotive force, improves the sinusoidality of the no-load back electromotive force waveform, and suppresses the harmonic components in the magnetic conductance waveform of the air gap, thereby improving the motor performance. However, the installation position of the permanent magnets in this structure is fixed and immovable, making it difficult to perform corresponding position adjustments, difficult to concentrate the magnetic field on the central magnetic force line, and difficult to change the direction and intensity of the magnetic field, resulting in a relatively small torque. Summary of the Invention

[0005] The present invention provides a ventilation-cooled permanent magnet synchronous motor and an energy-saving cook machine, aiming to solve the problems raised in the above background art.

[0006] The present invention is implemented as follows. The present invention provides the following technical solution: A ventilation-cooled permanent magnet synchronous motor includes a housing, and a regulation and connection assembly is provided on the housing.

[0007] The control connection component includes a cushion plate installed in the housing through bolts. A support ring is sleeved on the top of the cushion plate. A number of limiting grooves are distributed on the support ring, and an electromagnetic shielding block for electromagnetic shielding is embedded in each of the limiting grooves. A rotor is arranged in the middle of the support ring.

[0008] A number of position-adjustable nylon seats are distributed on the outer side of the support ring. A support frame is arranged at one end of each nylon seat. Windings are sleeved on both sides of the support frame. A support seat is installed on the nylon seat through bolts. The support seat is located at one end of the support frame. A power distribution frame is inserted into the top of the support seat. A nylon triangular plate is arranged on the top of the power distribution frame. The nylon triangular plate extends to the outside of the support ring, and a magnetic conduction part for magnetic force detection is embedded in the nylon triangular plate.

[0009] It can be seen that in the above technical solution, when the nylon seat is driven by the electric push rod to displace along the guide of the extension plate, the nylon seat drives the support seat, the power distribution frame, the nylon triangular plate, the support frame and the winding to gather or disperse towards the axis of the rotor, thereby realizing the adjustment of the range of the rotating magnetic field generated by the energization of the winding, changing the direction and intensity of the magnetic field, facilitating the concentration of the rotating magnetic field on the rotor, significantly improving the torque density and efficiency of the rotor. Each nylon triangular plate is located outside the support ring. At the same time, through the nylon triangular plate embedded in the support ring, the current and magnetic field in each winding around the support frame and the winding are measured to keep a constant voltage / frequency ratio, so as to realize the stability of maintaining the electromagnetic torque and the power angle characteristic.

[0010] Optionally, in a possible implementation manner, extension plates are arranged at the bottoms of multiple nylon seats, and each extension plate is installed on the outside of the housing through bolts. Sliding grooves are formed through the multiple extension plates. The bottom of the nylon seat extends into the sliding groove and is slidably connected with the sliding groove. An electric push rod for driving the displacement of the nylon seat is installed in the middle of the extension plate through bolts. An electrode plate is installed at one end of the extension plate through bolts. A first frequency converter is welded on the electrode plate. A flux sensor is arranged on one side of the first frequency converter. The flux sensor is welded on the electrode plate. A second frequency converter is arranged on one side of the flux sensor. The second frequency converter is welded on the electrode plate. A first wire is welded on the electrode plate. One end of the first wire extends to one side of the support seat and is welded on the outside of the support seat. Second wires are welded on both sides of the support frame, and one end of each second wire extends to the first wire. Third wires are welded on the flux sensor and the second frequency converter, and one end of each third wire extends to the magnetic conduction part.

[0011] It can be seen that in the above technical solution, when the electrode plate is started by the control button and three-phase alternating current is applied to each winding, a rotating magnetic field will be generated. This rotating magnetic field interacts with the magnetic field on the rotor to generate an electromagnetic force, causing the rotor to rotate. At the same time, through the electromagnetic shielding blocks each installed on the support ring, the function of shielding the electromagnetic field is realized, avoiding magnetic leakage and preventing the rotor from being unevenly affected by the electromagnetic field, which may affect torque and stability. Each winding is supplied with current through the first wire to the distributor, and the distributor conducts and transmits it to the winding. The magnitude and phase of the current can be adjusted by the first frequency converter, which can change the electromagnetic torque. By changing the frequency and voltage of the power supply, the current is changed, and then combined with the adjusted range of the rotating magnetic field generated by the winding, the demagnetizing current component is realized to maintain the voltage balance during high-speed operation, so as to achieve the purpose of field weakening and speed increasing.

[0012] An energy-saving chef machine uses the above-mentioned ventilation-cooled permanent magnet synchronous motor, and includes a sealing cover threadedly connected to the top of the housing. A transparent cover for protection is clamped on the sealing cover. A stirrer is arranged at the top of the inner cavity of the sealing cover. One end of the rotor penetrates through the housing and the sealing cover and extends to the middle of the stirrer. A heat exchange fin for heat exchange is sleeved outside the rotor. The heat exchange fin is located on the top of the support ring. An air-cooled radiator for heat dissipation is arranged in the middle of the heat exchange fin. The air-cooled radiator is installed on the rotor by bolts. A control button connected to the electrode plate by a wire is arranged on the outside of the housing.

[0013] The present invention has the following advantages:

[0014] When three-phase alternating current is applied to each winding in the present invention, a rotating magnetic field will be generated. This rotating magnetic field interacts with the magnetic field on the rotor to generate an electromagnetic force, causing the rotor to rotate. At the same time, through the electromagnetic shielding blocks each installed on the support ring, the function of shielding the electromagnetic field is realized, avoiding magnetic leakage and preventing the rotor from being unevenly affected by the electromagnetic field, which may affect torque and stability.

[0015] When the nylon seat is driven by the electric push rod to displace along the guide of the extension plate on the extension plate, the nylon seat drives the support seat, the distributor, the nylon triangular plate, the support frame and the winding to gather or disperse towards the axis of the rotor, thereby realizing the adjustment of the range of the rotating magnetic field generated by the energized winding, which can change the direction and intensity of the magnetic field, facilitating the concentration of the rotating magnetic field on the rotor, and significantly improving the torque density and efficiency of the rotor.

[0016] In the present invention, the current is transmitted to the distribution frame through the first wire and then conducted by the distribution frame to the winding. The magnitude and phase of the current can be adjusted by the first frequency converter, and the electromagnetic torque can be changed. By changing the frequency and voltage of the power supply, the current is changed, and then in combination with the adjustment of the winding, the range of the rotating magnetic field generated is changed, so as to realize the demagnetizing current component to maintain the voltage balance during high-speed operation, so as to achieve the purpose of weak magnetic speed increase.

[0017] In the present invention, each nylon triangular plate is located outside the support ring. At the same time, through the nylon triangular plates embedded in the support ring, the current and magnetic field in each winding support frame and winding are measured to keep a constant voltage / frequency ratio, so as to maintain the stability of the electromagnetic torque and power angle characteristics.

[0018] To sum up, through the corresponding cooperation of each structure, through the electromagnetic shielding blocks all installed on the support ring, the function of shielding the electromagnetic field is realized, avoiding the uneven action of the rotor by the electromagnetic field caused by the leakage of magnetic force, and the support frame and the winding converge or diverge towards the axis of the rotor, and then the range of the rotating magnetic field generated by the energization of the winding is adjusted, the direction and intensity of the magnetic field can be changed, which is convenient to concentrate the rotating magnetic field on the rotor, significantly improving the torque density and efficiency of the rotor. The magnitude and phase of the current can be adjusted by the first frequency converter, and the electromagnetic torque can be changed. By changing the frequency and voltage of the power supply, the current is changed, and then in combination with the adjustment of the winding to generate the range of the rotating magnetic field, the demagnetizing current component is realized to maintain the voltage balance during high-speed operation, so as to achieve the purpose of weak magnetic speed increase. Through the nylon triangular plates embedded in the support ring, the current and magnetic field in each winding support frame and winding are measured to keep a constant voltage / frequency ratio, so as to maintain the stability of the electromagnetic torque and power angle characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention, the drawings required for use in some embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limitations on the actual sizes of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present invention.

[0020] Figure 1 It is a schematic diagram of the housing, the transparent cover seal, the rotor and the stirrer of the present invention.

[0021] Figure 2 It is a schematic diagram of the installation of the regulation connection component in the housing of the present invention.

[0022] Figure 3Schematic diagram when the extension plate, nylon seat, electrode plate, first frequency converter, flux sensor, nylon triangular plate and support ring of the present invention are installed together.

[0023] Figure 4 Stereogram of the regulation connection component of the present invention.

[0024] Figure 5 Stereogram of the support ring and electromagnetic shielding block of the present invention.

[0025] Figure 6 Stereogram of the electrode plate, first frequency converter, flux sensor and magnetic conductive part of the present invention.

[0026] Figure 7 Stereogram of the nylon seat, power distribution frame, support frame, winding, nylon triangular plate and extension plate of the present invention.

[0027] Figure 8 Stereogram of the support seat, nylon seat, support frame, winding, power distribution frame and nylon triangular plate of the present invention.

[0028] In the figure: 1. Housing; 2. Pad; 3. Support ring; 4. Limit groove; 5. Electromagnetic shielding block; 6. Rotor; 7. Nylon seat; 8. Support frame; 9. Winding; 10. Support seat; 11. Power distribution frame; 12. Nylon triangular plate; 13. Extension plate; 14. Electric push rod; 15. Slide groove; 16. Electrode plate; 17. First frequency converter; 18. Flux sensor; 19. Magnetic conductive part; 20. Second frequency converter; 21. First wire; 22. Second wire; 23. Third wire; 24. Sealing cover; 25. Transparent cover; 26. Agitator; 27. Heat exchange fins; 28. Air-cooled radiator; 29. Control button. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] As shown in the attached Figure 1 - Figure 8A ventilation-cooled permanent magnet synchronous motor as shown realizes the function of shielding electromagnetic fields through the regulation connection assembly provided on the housing 1 and the corresponding cooperation of each structure. Through the electromagnetic shielding blocks 5 all installed on the support ring 3, the leakage of magnetic force is avoided, so that the rotor 6 is not affected unevenly by the electromagnetic field, which affects the torque and stability. The support frame 8 and the winding 9 converge or diverge towards the axis of the rotor 6, and then the range of the rotating magnetic field generated by the energization of the winding 9 is adjusted, the direction and intensity of the magnetic field can be changed, and it is convenient to concentrate the rotating magnetic field on the rotor 6, significantly improving the torque density and efficiency of the rotor 6. By adjusting the magnitude and phase of the current through the first frequency converter 17, the electromagnetic torque can be changed. By changing the frequency and voltage of the power supply, the current is changed, and then combined with the adjusted range of the rotating magnetic field generated by the winding 9, a demagnetizing current component is realized to maintain the voltage balance during high-speed operation, so as to achieve the purpose of weak magnetic speed increase. Through the nylon triangular plate 12 embedded in the support ring 3, the current and magnetic field in each winding support frame 8 and winding 9 are measured to keep a constant voltage / frequency ratio, so as to maintain the stability of the electromagnetic torque and power angle characteristics, and the specific structure of the assembly is as follows.

[0031] The regulation connection assembly includes a cushion plate 2 installed in the housing 1 through bolts. A support ring 3 is sleeved on the top of the cushion plate 2. A number of limiting grooves 4 are distributed on the support ring 3, and an electromagnetic shielding block 5 for electromagnetic shielding is embedded in each limiting groove 4. A rotor 6 is arranged in the middle of the support ring 3.

[0032] A number of position-adjustable nylon seats 7 are distributed on the outer side of the support ring 3. One end of each nylon seat 7 is provided with a support frame 8. Windings 9 are sleeved on both sides of the support frame 8. A support base 10 is installed on the nylon seat 7 through bolts. The support base 10 is located at one end of the support frame 8. A power distribution frame 11 is inserted into the top of the support base 10. A nylon triangular plate 12 is arranged on the top of the power distribution frame 11. The nylon triangular plate 12 extends to the outside of the support ring 3, and a magnetic conduction part 19 for magnetic force detection is embedded in the nylon triangular plate 12.

[0033] An extension plate 13 is provided at the bottom of each of the multiple nylon seats 7, and each extension plate 13 is installed on the outside of the housing 1 by bolts. A chute 15 is penetrated and opened on each of the multiple extension plates 13. The bottom of the nylon seat 7 extends into the chute 15 and is slidably connected to the chute 15. An electric push rod 14 for driving the displacement of the nylon seat 7 is installed in the middle of the extension plate 13 by bolts. An electrode plate 16 is installed at one end of the extension plate 13 by bolts. A first frequency converter 17 is welded on the electrode plate 16. A magnetic flux sensor 18 is provided on one side of the first frequency converter 17. The magnetic flux sensor 18 is welded on the electrode plate 16. A second frequency converter 20 is provided on one side of the magnetic flux sensor 18. The second frequency converter 20 is welded on the electrode plate 16. A first wire 21 is welded on the electrode plate 16. One end of the first wire 21 extends to one side of the support seat 10 and is welded on the outside of the support seat 10. Second wires 22 are welded on both sides of the support frame 8, and one end of each second wire 22 extends to the first wire 21. Third wires 23 are welded on both the magnetic flux sensor 18 and the second frequency converter 20, and one end of each third wire 23 extends to the magnetic conductive member 19.

[0034] An energy-saving cooking machine uses the above-mentioned ventilation-cooled permanent magnet synchronous motor and includes a sealing cover 24 threadedly connected to the top of the housing 1. A transparent cover 25 for protection is snap-fitted on the sealing cover 24. A stirrer 26 is provided at the top of the inner cavity of the sealing cover 24. One end of the rotor 6 penetrates through the housing 1 and the sealing cover 24 and extends to the middle of the stirrer 26. A heat exchange fin 27 for heat exchange is sleeved on the outside of the rotor 6. The heat exchange fin 27 is located on the top of the support ring 3. An air-cooled radiator 28 for heat dissipation is provided in the middle of the heat exchange fin 27. The air-cooled radiator 28 is installed on the rotor 6 by bolts. A control button 29 connected to the electrode plate 16 by a wire is provided on the outside of the housing 1.

[0035] During use according to the above structure, the user can place food in the sealing cover 24. After the cooking machine is powered on, the electrode plate 16 is started through the control button 29. When three-phase alternating current is passed through each winding 9, a rotating magnetic field will be generated. This rotating magnetic field interacts with the magnetic field on the rotor 6 to generate an electromagnetic force, causing the rotor 6 to generate a rotational motion. At the same time, through each electromagnetic shielding block 5 installed on the support ring 3, the function of shielding the electromagnetic field is realized, avoiding magnetic force leakage and causing uneven action of the electromagnetic field on the rotor 6, which affects the torque and stability.

[0036] When performing corresponding electromagnetic field regulation according to requirements, when the nylon seat 7 is driven by the electric push rod 14 to displace along the guide of the extension plate 13 on the extension plate 13, the nylon seat 7 drives the support seat 10, the power distribution frame 11, the nylon triangular plate 12, the support frame 8 and the winding 9 to converge or diverge towards the axis of the rotor 6. Subsequently, the range of the rotating magnetic field generated by the energization of the winding 9 is adjusted, the direction and intensity of the magnetic field can be changed, and it is convenient to concentrate the rotating magnetic field on the rotor 6, significantly improving the torque density and efficiency of the rotor 6.

[0037] Moreover, each winding 9 is supplied with current through the first wire 21 to the power distribution frame 11, and is conducted and transported to the winding 9 by the power distribution frame 11. The magnitude and phase of the current can be adjusted by the first frequency converter 17, the electromagnetic torque can be changed, and by changing the frequency and voltage of the power supply, the current is thereby changed. Then, in cooperation with the winding 9 to adjust the range of the generated rotating magnetic field, the demagnetizing current component is realized to maintain the voltage balance during high-speed operation, so as to achieve the purpose of weak magnetic speed increase.

[0038] Moreover, each nylon triangular plate 12 is located outside the support ring 3. At the same time, through the nylon triangular plate 12 embedded in the support ring 3, the current and magnetic field in each winding support frame 8 and winding 9 are measured to keep a constant voltage / frequency ratio, so as to maintain the stability of the electromagnetic torque and power angle characteristics.

[0039] Moreover, when the rotor 6 rotates, it can also drive the air-cooled radiator 28 to rotate, which is easy to dissipate heat, while the heat exchange fins 27 are used for heat conduction to improve the heat dissipation efficiency.

[0040] Different from the prior art, the present application discloses a ventilation-cooled permanent magnet synchronous motor. Through the corresponding cooperation of each structure, the electromagnetic shielding block 5 installed on the support ring 3 realizes the function of shielding the electromagnetic field, avoiding magnetic force leakage and causing uneven electromagnetic field action on the rotor 6, which affects the torque and stability. The support frame 8 and the winding 9 converge or diverge towards the axis of the rotor 6. Subsequently, the range of the rotating magnetic field generated by the energization of the winding 9 is adjusted, the direction and intensity of the magnetic field can be changed, and it is convenient to concentrate the rotating magnetic field on the rotor 6, significantly improving the torque density and efficiency of the rotor 6. The magnitude and phase of the current are adjusted by the first frequency converter 17, the electromagnetic torque can be changed, and by changing the frequency and voltage of the power supply, the current is thereby changed. Then, in cooperation with the adjustment of the winding 9, the range of the generated rotating magnetic field is adjusted, and the demagnetizing current component is realized to maintain the voltage balance during high-speed operation, so as to achieve the purpose of weak magnetic speed increase. Through the nylon triangular plate 12 embedded in the support ring 3, the current and magnetic field in each winding support frame 8 and winding 9 are measured to keep a constant voltage / frequency ratio, so as to maintain the stability of the electromagnetic torque and power angle characteristics.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ventilation-cooled permanent magnet synchronous motor, comprising a housing (1), characterized in that: A regulation connection component is provided on the housing (1); The regulation connection component includes a cushion plate (2) installed in the housing (1) through bolts. A support ring (3) is sleeved on the top of the cushion plate (2). A number of limit grooves (4) are distributed on the support ring (3), and an electromagnetic shielding block (5) for electromagnetic shielding is embedded in each of the limit grooves (4). A rotor (6) is arranged in the middle of the support ring (3); A number of position-adjustable nylon seats (7) are distributed on the outer side of the support ring (3). One end of each of the nylon seats (7) is provided with a support frame (8). Windings (9) are sleeved on both sides of the support frame (8). A support seat (10) is installed on the nylon seat (7) through bolts. The support seat (10) is located at one end of the support frame (8). A power distribution frame (11) is inserted into the top of the support seat (10). A nylon triangular plate (12) is arranged on the top of the power distribution frame (11). The nylon triangular plate (12) extends to the outside of the support ring (3), and a magnetic conduction part (19) for magnetic force detection is embedded in the nylon triangular plate (12).

2. The ventilated and cooled permanent magnet synchronous motor according to claim 1, characterized in that: Extension plates (13) are arranged at the bottoms of a plurality of the nylon seats (7), and each of the extension plates (13) is installed on the outside of the housing (1) through bolts.

3. The ventilated and cooled permanent magnet synchronous motor according to claim 2, wherein: Chutes (15) are penetrated and opened on a plurality of the extension plates (13). The bottom of the nylon seat (7) extends into the chute (15) and is slidably connected with the chute (15). An electric push rod (14) for driving the displacement of the nylon seat (7) is installed in the middle of the extension plate (13) through bolts.

4. The ventilation-cooled permanent magnet synchronous motor according to claim 2, characterized in that: One end of the extension plate (13) is installed with an electrode plate (16) through bolts. A first frequency converter (17) is welded on the electrode plate (16). A magnetic flux sensor (18) is arranged on one side of the first frequency converter (17), and the magnetic flux sensor (18) is welded on the electrode plate (16).

5. The ventilated and cooled permanent magnet synchronous motor according to claim 4, characterized in that: A second frequency converter (20) is arranged on one side of the magnetic flux sensor (18), and the second frequency converter (20) is welded on the electrode plate (16). A first wire (21) is welded on the electrode plate (16). One end of the first wire (21) extends to one side of the support seat (10) and is welded on the outside of the support seat (10).

6. The ventilated and cooled permanent magnet synchronous motor according to claim 5, wherein: Second wires (22) are welded on both sides of the support frame (8), and one end of each of the second wires (22) extends to the first wire (21).

7. The ventilated and cooled permanent magnet synchronous motor according to claim 5, characterized in that: Third wires (23) are welded on both the magnetic flux sensor (18) and the second frequency converter (20), and one end of each of the third wires (23) extends to the magnetic conduction part (19).

8. An energy-saving chef machine, comprising the ventilation and cooling type permanent magnet synchronous motor as described in claim 4, characterized in that: It includes a sealing cover (24) threadedly connected to the top of the housing (1). A transparent cover (25) for protection is clamped on the sealing cover (24). A stirrer (26) is arranged at the top of the inner cavity of the sealing cover (24).

9. The energy-saving chef machine according to claim 8, wherein: One end of the rotor (6) penetrates through the housing (1) and the sealing cover (24) and extends to the middle of the stirrer (26). A heat exchange fin (27) for heat exchange is sleeved on the outside of the rotor (6), and the heat exchange fin (27) is located on the top of the support ring (3).

10. The energy-saving chef machine according to claim 9, characterized in that: An air-cooled radiator (28) for heat dissipation is provided in the middle of the heat exchange fin (27). The air-cooled radiator (28) is installed on the rotor (6) by bolts. A control button (29) connected to the electrode plate (16) by a wire is provided on the outer side of the housing (1).

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