Food processor with good noise reduction effect

Abstract

The utility model discloses a food processor with a good noise reduction effect, which relates to the field of life electric appliances, and comprises a main machine and a detachable cup body assembly arranged above the main machine, the cup body assembly comprises a cup body with a processing cavity and a brushless motor arranged below the cup body, and the cup body assembly further comprises a cup seat fixed below the cup body, a mounting cavity for accommodating the brushless motor is defined by the cup base and the bottom wall of the cup body, the brushless motor comprises a motor shell with an accommodating cavity and a stator and a rotor which are arranged in the accommodating cavity, the outer diameter D1 of the rotor and the inner diameter D2 of the mounting cavity meet the condition that D1 / D2 is greater than or equal to 1 / 4 and less than or equal to 1 / 2, and the outer diameter of the rotor and the inner diameter of the mounting cavity are within the ratio range; it can be guaranteed that the food processor effectively processes food materials, meanwhile, noise can be reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a food processor with good noise reduction effect. Background Art

[0002] Existing food processors generally include a main body and a cup assembly with a stirring member inside. A series-wound motor in the main body is drivingly connected to the stirring member. When a user uses the food processor to process food materials, the food materials are placed in the cup assembly, and the stirring member rotates at a high speed driven by the series-wound motor to realize the crushing and processing of the food materials. However, since the series-wound motor generates relatively large noise during operation, some manufacturers will replace the series-wound motor with a brushless motor to reduce the noise generated during the operation of the whole machine.

[0003] However, in order to pursue better noise reduction effect, some manufacturers will make the size of the brushless motor smaller, especially make the outer diameter of the rotor of the brushless motor smaller, so as to reduce the noise generated when the rotor of the brushless motor rotates. However, as the rotor of the brushless motor is too small, the power of the brushless motor is relatively low, resulting in the user being unable to effectively cut the food materials during food processing. And the farther the cup body is from the maximum linear velocity position of the crushing knife relative to the inner wall of the relatively large cup body, the more difficult it is to gather and crush the food materials, resulting in poor crushing effect of the food materials. In order to increase the power of the brushless motor, the outer diameter of the rotor of the brushless motor is made larger. However, if the outer diameter of the rotor is too large relative to the cup body, the wall of the installation cavity for installing the brushless motor will be at a small interval from the brushless motor, resulting in the noise generated by the rotor being transmitted outward more quickly when the brushless motor is operating, and thus resulting in too much working noise. In summary, it is difficult to balance the requirements of ensuring the crushing effect and reducing the noise generation of the food processor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a food processor with good noise reduction effect, so as to solve the problem that it is difficult to balance ensuring the crushing effect and reducing the noise generation when using a brushless motor in an existing food processor.

[0005] To achieve the above purpose, the utility model provides a food processor with good noise reduction effect, which includes a main body and a cup assembly detachably arranged above the main body. The cup assembly includes a cup body with a processing cavity and a brushless motor arranged below the cup body. The cup assembly further includes a cup base fixed below the cup body. The cup base and the bottom wall of the cup body enclose an installation cavity for accommodating the brushless motor. The brushless motor includes a motor housing formed with an accommodation cavity, a stator and a rotor arranged in the accommodation cavity. The outer diameter D1 of the rotor and the inner diameter D2 of the installation cavity satisfy: 1 / 4 ≤ D1 / D2 ≤ 1 / 2.

[0006] By using a brushless motor and leveraging its characteristics, when the user uses the food processor to process food ingredients, the motor rotates with lower noise, achieving the effect of noise reduction. At the same time, the brushless motor can achieve variable frequency control, enabling the food processor to control the brushless motor to output different speeds according to different food ingredients and processing processes, making the processing effect of the food ingredients better and the processing more sufficient, improving the taste of the processed food ingredients. Moreover, the brushless motor occupies less space, which helps to improve the compactness of the internal structure of the whole machine and reduce the occupied space of the food processor, facilitating the user's storage.

[0007] At the same time, the cup holder and the bottom wall of the cup body enclose to form an installation cavity for accommodating the brushless motor. The brushless motor includes a motor housing formed with an accommodation cavity, a stator and a rotor disposed in the accommodation cavity. When the user uses the food processor to process food ingredients, the noise generated by the high-speed rotation of the rotor is first blocked and rebounded in the accommodation cavity to reduce noise. Another part of the noise transmitted outward through the gaps of the motor housing can be blocked and rebounded in the installation cavity to reduce noise, thereby achieving double sound insulation and noise reduction for the noise generated by the rotor, greatly reducing the noise transmitted to the outside and improving the noise reduction effect.

[0008] And the outer diameter D1 of the rotor and the inner diameter D2 of the installation cavity satisfy: 1 / 4 ≤ D1 / D2 ≤ 1 / 2. On the one hand, when the outer diameter of the installation cavity, that is, the outer diameter of the cup holder, is the same, it is avoided that the outer diameter of the rotor is too small relative to the inner diameter of the installation cavity, resulting in a relatively low power of the brushless motor, making it impossible for the user to effectively cut the food ingredients during processing, and then resulting in a poor taste of the processed food ingredients. At the same time, the larger the inner diameter of the installation cavity, the larger the outer diameter of the cup body, and the farther the inner wall of the cup body is from the maximum linear velocity of the crushing knife, making it difficult to gather and crush the food ingredients, and then resulting in a poor crushing effect of the food ingredients. On the other hand, it is avoided that the outer diameter of the rotor is too large relative to the inner diameter of the installation cavity, resulting in a relatively small interval between the cavity wall of the installation cavity and the outer wall of the accommodation cavity, causing the noise generated by the rotor during the operation of the brushless motor to be transmitted outward more quickly, and then resulting in a too large working noise. That is, when the outer diameter of the rotor and the inner diameter of the installation cavity are within this ratio range, it can ensure that the food processor can effectively process the food ingredients while reducing the transmission of noise and improving the user experience.

[0009] In a preferred implementation manner of a food processor with good noise reduction effect, the vertical height L1 of the accommodation cavity and the vertical height L2 of the installation cavity satisfy: L1 ≤ 3 / 5L2.

[0010] By setting the vertical height L1 of the accommodation cavity and the vertical height L2 of the installation cavity to satisfy: L1 ≤ 3 / 5L2, the axial height of the brushless motor and the heating plate is compressed, so that the overall axial height of the machine is lower and thinner. At the same time, the occupied space of the food processor is reduced, and the center of gravity height of the whole machine is reduced, making the food processor more stable during operation and facilitating the user to pick up the whole machine. At the same time, it is avoided that the vertical height of the accommodation cavity is relatively large compared to the vertical height of the installation cavity, resulting in the bottom wall of the accommodation cavity being relatively close to the bottom wall of the installation cavity, causing the noise transmitted from the accommodation cavity to be able to spread out through the installation cavity more quickly and not being effectively noise-reduced, thus leading to a large noise situation, which helps to further improve the noise reduction effect.

[0011] In a preferred implementation of a food processor with good noise reduction effect, the cup body is open at both the top and the bottom. The cup body assembly further includes a heating plate provided at the lower opening of the cup body. The motor housing includes a bottom cover provided below the rotor and the stator, and the bottom cover is fixedly connected to the heating plate to clamp and fix the stator and the rotor.

[0012] By setting the motor housing to include a bottom cover provided below the rotor and the stator, and the bottom cover is fixedly connected to the heating plate to clamp and fix the stator and the rotor. Compared with the existing method that requires an additional motor upper cover, and the stator and the rotor are fixed between the motor upper cover and the bottom cover and then the whole brushless motor is fixed on the heating plate, this solution also realizes the assembly of the brushless motor when assembling the whole machine, simplifies the installation steps, and at the same time saves a motor upper cover, greatly simplifies the overall number of parts of the whole motor and the whole machine, and helps to further improve the compactness of the internal structure of the whole machine. It can further increase the distance between the bottom wall of the accommodation cavity and the bottom wall of the installation cavity, so that the noise can achieve better sound insulation and noise reduction after entering the installation cavity, which helps to further improve the noise reduction effect.

[0013] In a preferred implementation of a food processor with good noise reduction effect, the heating plate is provided with a convex portion extending upward into the processing cavity, and the convex portion and the bottom cover enclose an accommodation cavity for fixing the stator and the rotor.

[0014] By providing the heating plate with a convex portion extending upward into the processing cavity, and the convex portion and the bottom cover enclose an accommodation cavity for fixing the stator and the rotor, the upper half of the accommodation cavity can enter the processing cavity, thus further increasing the assembly height of the motor, reducing the overall height of the whole cup body assembly, and further reducing the center of the whole machine, improving the stability of the operation of the whole machine.

[0015] In a preferred implementation of a food processor with good noise reduction effect, the heating plate is provided with a limiting rib extending downward and surrounding the outside of the stator, and the heating plate further includes a heating tube, and the heating tube is provided outside the limiting rib.

[0016] By providing the heating plate with a limiting rib that extends downward and surrounds the outside of the stator, the heating plate can limit the stator through the limiting part, ensuring the stability of the stator's position. This prevents the situation where the stator vibrates when the rotor rotates at high speed due to low stator stability, resulting in unstable rotation or even yaw of the entire brushless motor. It helps improve the rotational stability of the entire brushless motor and reduces the noise generated during stator vibration, further enhancing the noise reduction effect. At the same time, the heating tube is arranged outside the limiting rib, enabling the heat generated by the heating tube to be isolated from the accommodation cavity under the blockage of the limiting rib, effectively reducing the heat conducted by the heating tube into the accommodation cavity, achieving a heat insulation effect and reducing the temperature rise of the stator and rotor.

[0017] In a preferred implementation of a food processor with good noise reduction effect, the heating plate is provided with a limiting rib that extends downward and surrounds the outside of the stator. The heating plate further includes electronic components, and the electronic components are arranged inside the limiting rib.

[0018] By setting the heating plate to further include electronic components and arranging the electronic components inside the limiting rib, the heating plate can not only heat the food ingredients but also fix the brushless motor and install and fix the electronic components, achieving functional integration. This helps reduce the number of parts of the whole machine, further enhance the compactness of the internal structure of the whole machine, and at the same time reduce the size of the accommodation cavity, thereby ensuring that there is enough space for further noise reduction after the noise is transmitted to the installation cavity, further enhancing the noise reduction effect.

[0019] In a preferred implementation of a food processor with good noise reduction effect, the vertical height L3 of the cup body assembly and the vertical height L2 of the installation cavity satisfy: 1 / 6 ≤ L3 / L2 ≤ 1 / 3.

[0020] By setting the vertical height L3 of the cup body assembly and the vertical height L2 of the installation cavity to satisfy: 1 / 6 ≤ L3 / L2 ≤ 1 / 3, it is avoided that the vertical height of the installation cavity is relatively small compared to the vertical height of the cup body assembly, resulting in the bottom wall of the accommodation cavity being close to the bottom wall of the installation cavity, causing the noise transmitted from the accommodation cavity to be able to pass through the installation cavity and spread out more quickly without effective noise reduction, leading to a large amount of noise. At the same time, it is also avoided that the vertical height of the installation cavity is relatively large compared to the vertical height of the cup body assembly, resulting in a higher vertical height and center of gravity of the whole machine, and thus causing the whole machine to be prone to vibration noise or even tipping during operation.

[0021] In a preferred implementation of a food processor with good noise reduction effect, the motor housing and the cup base are provided with an air outlet channel that connects the accommodation cavity and the outside.

[0022] By providing an air outlet passage that connects the accommodation cavity and the outside world between the motor housing and the cup holder, when the brushless motor is operating, the air can be quickly discharged to the outside through the air outlet passage, thereby increasing the air flow rate passing through the stator and the rotor per unit time, and further improving the heat dissipation effect of the brushless motor, avoiding the situation where the stator and the rotor are severely aged due to high temperature rise.

[0023] In a preferred implementation of a food processor with good noise reduction effect, the air outlet passage includes a first passage provided on the motor housing and extending horizontally outward, and a second passage provided on the cup holder and extending vertically.

[0024] By setting the air outlet passage to include a first passage provided on the motor housing and extending horizontally outward and a second passage provided on the cup holder and extending vertically, when the carbon powder generated during the rotation of the brushless motor is discharged outward with the air flow, part of the carbon powder can adhere to the first passage, and then when passing through the bend, most of the carbon powder can adhere to the second passage, greatly reducing the discharge of carbon powder and avoiding the situation where carbon powder overflows from the cup body assembly, causing carbon powder pollution and unsightliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 It is a line graph of the noise reduction and crushing effect of the food processor in an embodiment of the present invention versus D1 / D2;

[0027] Figure 2 It is a schematic structural diagram of the food processor in an embodiment of the present invention;

[0028] Figure 3 It is a cross-sectional view of the food processor in an embodiment of the present invention;

[0029] Figure 4 It is a cross-sectional view of the cup body assembly in an embodiment of the present invention;

[0030] Figure 5 It is a cross-sectional view of components such as the brushless motor and the heating plate in an embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the heating plate in an embodiment of the present invention.

[0032] List of Components and Reference Numerals:

[0033] 1 - Cup body, 11 - Processing cavity; 2 - Main body; 3 - Stator; 4 - Rotor; 5 - Bottom cover, 51 - Accommodating cavity; 6 - Motor housing, 61 - Installation cavity; 7 - Heating plate, 71 - Limiting rib, 72 - Heating tube; 8 - Air outlet channel, 81 - First channel, 82 - Second channel; 9 - Electronic components, 91 - Fuse, 92 - Thermostat, 93 - NTC. Detailed implementation manners

[0034] In order to more clearly illustrate the overall concept of the present utility model, the following will be further described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0035] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific implementation manners disclosed below.

[0036] As Figures 1 to 6 As shown, the present utility model provides a food processor with good noise reduction effect, including a main body 2 and a cup body assembly detachably disposed above the main body 2. The cup body assembly includes a cup body 1 having a processing cavity 11 and a brushless motor disposed below the cup body 1. The cup body assembly further includes a cup base fixed to the bottom of the cup body 1. The cup base and the bottom wall of the cup body 1 enclose an installation cavity 61 for accommodating the brushless motor. The brushless motor includes a motor housing 6 having an accommodating cavity 51, a stator 3 and a rotor 4 disposed in the accommodating cavity 51. The outer diameter D1 of the rotor 4 and the inner diameter D2 of the installation cavity 61 satisfy: 1 / 4 ≤ D1 / D2 ≤ 1 / 2.

[0037] In this application, by using a brushless motor and relying on the characteristics of the brushless motor, when the user uses the food processor to process food materials, the noise generated by the rotation of the motor is lower, achieving the effect of noise reduction. At the same time, the brushless motor can achieve variable frequency control, enabling the food processor to control the brushless motor to output different speeds according to different food materials and processing processes, which can make the processing effect of the food materials better and the processing more sufficient, improving the output taste of the food materials. Moreover, the brushless motor occupies less space, which helps to improve the compactness of the internal structure of the whole machine, reduce the occupied space of the food processor, and facilitate the user to store.

[0038] Meanwhile, the cup holder and the bottom wall of the cup body 1 enclose to form an installation cavity 61 for accommodating the brushless motor. The brushless motor includes a motor housing 6 having an accommodation cavity 51, a stator 3 disposed in the accommodation cavity 51, and a rotor 4. When the user uses the food processor to process food materials, the noise generated by the high-speed rotation of the rotor 4 is first blocked and rebounded in the accommodation cavity 51 to reduce noise. Another part of the noise transmitted outward through the gaps of the motor housing 6 can be blocked and rebounded in the installation cavity 61 to reduce noise. Thus, double sound insulation and noise reduction of the noise generated by the rotor 4 are achieved, greatly reducing the noise transmitted to the outside and improving the noise reduction effect.

[0039] And the outer diameter D1 of the rotor 4 and the inner diameter D2 of the installation cavity 61 satisfy: 1 / 4 ≤ D1 / D2 ≤ 1 / 2. When the outer diameter dimensions of the installation cavity 61, i.e., the cup holder, are the same, on the one hand, it is avoided that the outer diameter of the rotor 4 is too small relative to the inner diameter of the installation cavity 61, resulting in a relatively low power of the brushless motor, making it impossible for the user to effectively cut the food materials during food processing, and further leading to a poor taste of the processed food materials. At the same time, the larger the inner diameter of the installation cavity 61, the larger the outer diameter of the cup body 1, and the farther the inner wall of the cup body 1 is from the maximum linear velocity of the crushing knife, resulting in difficulty in gathering and crushing the food materials, and further causing a poor crushing effect of the food materials. On the other hand, it is avoided that the outer diameter of the rotor 4 is too large relative to the inner diameter of the installation cavity 61, resulting in a small interval between the cavity wall of the installation cavity 61 and the outer wall of the accommodation cavity 51. When the brushless motor is working, the noise generated by the rotor 4 can be transmitted outward more quickly, further leading to an excessive working noise. That is, when the outer diameter of the rotor 4 and the inner diameter of the installation cavity 61 are within this ratio range, it can ensure that the food processor can effectively process the food materials while reducing the transmission of noise and improving the user experience.

[0040] Specifically, as Figure 1 and shown in the following table, the unit of the noise data in the table is decibel (dB), and the crushing effect is nominalized by the crushing particle size after the food materials are crushed. The unit of the crushing particle size data is μm. In this line chart, the abscissa is the ratio of D1 / D2. It can be clearly seen from this line chart that the noise will increase with the increase of the ratio of D1 / D2, and the crushing effect will increase with the increase of the ratio of D1 / D2. If a higher crushing effect is pursued, that is, when the outer diameter D1 of the rotor 4 is relatively large compared to the inner diameter of the installation cavity 61, as Figure 1 shown, the noise during the food processing process is very loud; if a higher noise reduction effect is pursued, that is, when the outer diameter D1 of the rotor 4 is relatively small compared to the inner diameter of the installation cavity 61, as Figure 1 shown, the crushing effect of the machine on the food materials is greatly reduced, the particle size in the slurry increases, the taste is rough, and the residue feeling is heavy. Therefore, to ensure that the food processor can effectively process the food materials and the slurry has a delicate taste while also ensuring the noise reduction effect, the interval of D1 / D2 is Figure 1Within the middle rectangular region, that is, 1 / 4 ≤ D1 / D2 ≤ 1 / 2, and more preferably, D1 / D2 = 1 / 2.

[0041] D1 / D2 1 / 7 1 / 6 1 / 5 1 / 4 1 / 3 1 / 2 1 Noise (dB) 38 43 50 60 77 85 112 Crushing particle size (μm) 200 170 130 110 85 55 25

[0042] As a preferred embodiment of the present application, as Figure 4 shown, the vertical height L1 of the accommodation cavity 51 and the vertical height L2 of the installation cavity 61 satisfy: L1 ≤ 3 / 5L2, and more preferably, L1 = 3 / 5L2.

[0043] By setting the vertical height L1 of the accommodation cavity 51 and the vertical height L2 of the installation cavity 61 to satisfy: L1 ≤ 3 / 5L2, the axial height of the brushless motor and the heating plate 7 is compressed, so that the overall axial height of the machine is lower and thinner. At the same time, the occupied space of the food processor is reduced, and the center of gravity height of the whole machine is reduced, making the food processor more stable during operation and facilitating the user to pick up the whole machine. At the same time, it is avoided that the bottom wall of the accommodation cavity 51 is too close to the bottom wall of the installation cavity 61 due to the relatively large vertical height of the accommodation cavity 51 relative to the vertical height of the installation cavity 61, resulting in the noise transmitted from the accommodation cavity 51 being able to pass out through the installation cavity 61 more quickly and not being effectively noise-reduced, thereby causing a large noise situation, which helps to further improve the noise reduction effect.

[0044] As a preferred embodiment of the present application, as Figure 4 shown, the cup body 1 has openings at both the top and bottom. The cup body assembly further includes a heating plate 7 provided at the lower opening of the cup body 1. The motor housing 6 includes a bottom cover 5 provided below the rotor 4 and the stator 3. The bottom cover 5 is fixedly connected to the heating plate 7 to clamp and fix the stator 3 and the rotor 4.

[0045] By setting the motor housing 6 to include a bottom cover 5 provided below the rotor 4 and the stator 3, and the bottom cover 5 is fixedly connected to the heating plate 7 to clamp and fix the stator 3 and the rotor 4. Compared with the existing one that requires an additional motor upper cover, and the stator 3 and the rotor 4 are fixed between the motor upper cover and the bottom cover 5 and then the whole brushless motor is fixed on the heating plate 7, this solution also realizes the assembly of the brushless motor when assembling the whole machine, simplifies the installation steps, and at the same time saves a motor upper cover, greatly simplifies the overall number of parts of the whole motor and the whole machine, and helps to further improve the compactness of the internal structure of the whole machine. It can further increase the distance between the bottom wall of the accommodation cavity 51 and the bottom wall of the installation cavity 61, so that the noise can achieve better sound insulation and noise reduction after entering the installation cavity 61, which helps to further improve the noise reduction effect.

[0046] Furthermore, as Figure 4 shown, the heating plate 7 is provided with a convex portion extending upward into the processing cavity 11. The convex portion and the bottom cover 5 enclose an accommodation cavity 51 for fixing the stator 3 and the rotor 4.

[0047] By providing a convex portion on the heating plate 7 that extends upward into the processing cavity 11, the convex portion and the bottom cover 5 enclose a receiving cavity 51 for fixing the stator 3 and the rotor 4, so that the upper half of the receiving cavity 51 can enter the processing cavity 11, thereby further increasing the assembly height of the motor, reducing the overall height of the entire cup assembly, further lowering the center of the whole machine, and improving the running stability of the whole machine.

[0048] It should be noted that the present application does not specifically limit the installation method of the cup body 1 in this embodiment. As a preferred option in this embodiment, as Figure 4 shown, the bottom end of the cup body 1 is clamped and fixed between the side wall of the convex portion and the cup base.

[0049] As a preferred option in this embodiment, as Figure 4 、 Figure 5 shown, the heating plate 7 is provided with a limiting rib 71 that extends downward and surrounds the outside of the stator 3. The heating plate 7 further includes a heating tube 72, and the heating tube 72 is arranged outside the limiting rib 71.

[0050] By providing a limiting rib 71 on the heating plate 7 that extends downward and surrounds the outside of the stator 3, the heating plate 7 limits the stator 3 through the limiting portion, ensuring the stability of the position of the stator 3, and avoiding the situation that the stator 3 vibrates when the rotor 4 rotates at high speed, resulting in unstable rotation or even yaw of the entire brushless motor. This helps to improve the rotation stability of the entire brushless motor, and at the same time reduces the noise generated when the stator 3 vibrates, further improving the noise reduction effect. At the same time, the heating tube 72 is arranged outside the limiting rib 71, so that the heat generated by the heating tube 72 can be isolated from the receiving cavity 51 under the block of the limiting rib 71, thereby effectively reducing the heat conducted by the heating tube 72 into the receiving cavity 51, achieving a heat insulation effect, and reducing the temperature rise of the stator 3 and the rotor 4.

[0051] As a preferred option in this embodiment, as Figure 6 shown, the heating plate 7 is provided with a limiting rib 71 that extends downward and surrounds the outside of the stator 3. The heating plate 7 further includes electronic components 9, and the electronic components 9 are arranged inside the limiting rib 71. Specifically, the electronic components 9 include components such as a thermostat 92, a fuse body 91, and an NTC 93, which will not be elaborated here.

[0052] By setting the heating plate 7 to further include an electronic component 9, and arranging the electronic component 9 inside the limiting rib 71, the heating plate 7 can not only heat food materials, but also fix the brushless motor, and can also fix the installation of the electronic component 9, achieving functional integration, which helps to reduce the number of parts of the whole machine, further improve the compactness of the internal structure of the whole machine, and at the same time reduce the size of the accommodation cavity 51, so as to ensure that there is enough space for further noise reduction after the noise is transmitted into the installation cavity 61, further improving the noise reduction effect.

[0053] It should be noted that the present application does not specifically limit the relationship between the vertical height of the cup body assembly and the vertical height of the installation cavity 61. As a preferred embodiment of the present application, as Figure 4 shown, the vertical height L3 of the cup body assembly and the vertical height L2 of the installation cavity 61 satisfy: 1 / 6 ≤ L3 / L2 ≤ 1 / 3. More preferably, L3 / L2 = 1 / 3 or L3 / L2 = 1 / 4.

[0054] By setting the vertical height L3 of the cup body assembly and the vertical height L2 of the installation cavity 61 to satisfy: 1 / 6 ≤ L3 / L2 ≤ 1 / 3, it is avoided that the vertical height of the installation cavity 61 is relatively small compared to the vertical height of the cup body assembly, resulting in the bottom wall of the accommodation cavity 51 being close to the bottom wall of the installation cavity 61, causing the noise transmitted from the accommodation cavity 51 to be able to pass through the installation cavity 61 and be transmitted outward more quickly, without effective noise reduction, and thus resulting in a large noise situation; at the same time, it is avoided that the vertical height of the installation cavity 61 is relatively large compared to the vertical height of the cup body assembly, resulting in a relatively high vertical height and center of gravity of the whole machine, and thus causing the whole machine to be prone to vibration noise and even tipping during operation.

[0055] As a preferred embodiment of the present application, as Figure 5 shown, the motor housing 6 and the cup base are provided with an air outlet channel 8 communicating the accommodation cavity 51 with the outside.

[0056] By providing an air outlet channel 8 communicating the accommodation cavity 51 with the outside between the motor housing 6 and the cup base, when the brushless motor is working, it can quickly discharge the air flow outward through the air outlet channel 8, thereby increasing the air flow rate passing through the stator 3 and the rotor 4 per unit time, and further improving the heat dissipation effect of the brushless motor, avoiding the situation that the stator 3 and the rotor 4 are severely aged due to high temperature rise.

[0057] Furthermore, as Figure 6 shown, the air outlet channel 8 includes a first channel 81 provided on the motor housing 6 and extending horizontally outward and a second channel 82 provided on the cup base and extending vertically.

[0058] By setting the air outlet channel 8 to include a first channel 81 provided on the motor housing 6 and extending laterally outward and a second channel 82 provided on the cup holder and extending vertically, when the carbon powder generated by the brushless motor during rotation is discharged outward along with the air flow, part of the carbon powder can adhere to the inside of the first channel 81, and then when passing through the bend, most of the carbon powder can adhere to the inside of the second channel 82, greatly reducing the discharge of carbon powder and avoiding the situation of carbon powder overflowing outside the cup assembly, causing carbon powder pollution and unsightliness.

[0059] The technical solution protected by the present utility model is not limited to the above embodiments. It should be noted that the combination of the technical solution of any one embodiment with the technical solutions of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all belong to the scope required to be protected by the present utility model.

Claims

1. A food processor with good noise reduction effect, comprising a main body and a cup assembly detachably disposed above the main body, the cup assembly including a cup having a processing cavity and a brushless motor disposed below the cup, characterized in that, The cup body assembly further includes a cup base fixed below the cup body. The cup base and the bottom wall of the cup body enclose an installation cavity for accommodating the brushless motor. The brushless motor includes a motor housing having an accommodation cavity, a stator and a rotor disposed in the accommodation cavity. The outer diameter D1 of the rotor and the inner diameter D2 of the installation cavity satisfy: 1 / 4 ≤ D1 / D2 ≤ 1 / 2.

2. The food processor with good noise reduction effect according to claim 1, characterized in that, The vertical height L1 of the accommodation cavity and the vertical height L2 of the installation cavity satisfy: L1 ≤ 3 / 5L2.

3. A food processor with good noise reduction effect according to claim 1, characterized in that, The cup body has openings at both the top and the bottom. The cup body assembly further includes a heating plate disposed at the lower opening of the cup body. The motor housing includes a bottom cover disposed below the rotor and the stator. The bottom cover is fixedly connected to the heating plate to clamp and fix the stator and the rotor.

4. A food processor with good noise reduction effect according to claim 3, characterized in that, The heating plate is provided with a convex portion extending upward into the processing cavity. The convex portion and the bottom cover enclose an accommodation cavity for fixing the stator and the rotor.

5. A food processor with good noise reduction effect according to claim 4, characterized in that, The bottom end of the cup body is clamped and fixed between the side wall of the convex portion and the cup base.

6. The food processor with good noise reduction effect according to claim 3, characterized in that, The heating plate is provided with a limiting rib extending downward and surrounding the outside of the stator. The heating plate further includes a heating tube disposed outside the limiting rib.

7. A food processor with good noise reduction effect according to claim 3, characterized in that, The heating plate is provided with a limiting rib extending downward and surrounding the outside of the stator. The heating plate further includes an electronic component disposed inside the limiting rib.

8. A food processor with good noise reduction effect according to claim 1, characterized in that, The vertical height L3 of the cup body assembly and the vertical height L2 of the installation cavity satisfy: 1 / 6 ≤ L3 / L2 ≤ 1 / 3.

9. The food processor with good noise reduction effect according to claim 1, characterized in that, The motor housing and the cup base are provided with an air outlet channel communicating the accommodation cavity with the outside.

10. A food processor with good noise reduction effect according to claim 9, characterized in that, The air outlet channel includes a first channel disposed in the motor housing and extending horizontally outward and a second channel disposed in the cup base and extending vertically.

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