Food processor

Abstract

The food processor comprises a main machine internally provided with a motor assembly and a cup body assembly installed on the main machine, the motor assembly comprises a motor and a motor cover arranged on the outer side of the motor in a covering mode, the motor cover comprises a first cover body and a second cover body, and the first cover body and the second cover body are transversely enclosed to form an installation cavity wrapping the motor; the top of the installation cavity protrudes upwards to form a protruding part, a plurality of air inlet holes are formed in the top face of the protruding part, an air outlet is formed in the bottom of the installation cavity, the side wall of the protruding part inclines towards the air inlet holes from bottom to top to form an air guide face, the motor rotates to work, the air guide face is used for guiding airflow outside the motor cover into the air inlet holes, and the air outlet is used for discharging airflow in the motor cover. According to the food processor, the top of the motor cover is provided with the air guide face and the air inlet holes, noise reduction is achieved, meanwhile, external airflow can be guided to rapidly enter the motor cover to dissipate heat of the motor, and meanwhile the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a food processor. Background Art

[0002] In existing food processing machines, such as wall-breaking machines, for models in which the motor is arranged inside the main unit, a motor cover is usually provided on the outside of the motor in order to enhance the sound insulation effect of the motor. The existing motor cover is arranged lower than the motor bracket, and during the heat dissipation of the motor, the cold air flowing into the main casing enters from the gap between the motor bracket and the motor cover. On the one hand, the low air intake efficiency will affect the heat dissipation efficiency, and on the other hand, the noise generated during the operation of the machine (especially the noise generated by the rotation of the motor) is easy to be transmitted outward from the top of the motor bracket. Even if an air duct cover surrounding the motor cover is further arranged in the main casing, there is still a gap between the top of the air duct cover and the main casing, and the noise is easy to be transmitted from the gap. The noise is transmitted to the outside after only one reflection from the main casing, which ultimately leads to a large noise transmitted to the outside, greatly affecting the consumer experience.

[0003] In the related art, for example, the food processing machine disclosed in patent CN215687204U has an open top and an air inlet formed on the top of the motor cover. Although it is convenient for large-area air intake, the noise of the motor will be directly transmitted upward from the air inlet during the operation of the motor, resulting in poor noise reduction effect of the machine. In another food processing machine disclosed in patent CN114568977B, the top of the motor cover is directly fixedly connected to the bottom of the crushing cup. On the one hand, during the heat dissipation of the motor, cold air enters the motor cover from the matching position of the motor cover and the crushing cup, and the air intake efficiency is low. On the other hand, the motor cover is optimized for noise reduction by setting silencer holes and sound insulation chambers, resulting in a complex structure of the motor cover and high manufacturing cost. In addition, since the motor is directly connected to the crushing cup, the vibration generated by the motor can easily cause the crushing cup to resonate, resulting in increased noise, and some noise can be transmitted through the matching position of the motor cover and the crushing cup, resulting in poor noise reduction effect. Summary of the invention

[0004] In order to solve the technical problems in the prior art of low air intake efficiency of the motor cover of the food processor resulting in poor heat dissipation effect and poor noise reduction effect of the motor, the present invention provides a food processor aiming to optimize the structure of the motor cover to improve the heat dissipation effect and noise reduction effect of the motor.

[0005] The present invention discloses a food processing machine, comprising a main machine with a motor assembly built in and a cup body assembly installed on the main machine, the motor assembly comprising a motor and a motor cover arranged on the outside of the motor, the motor cover comprising a first cover body and a second cover body, the first cover body and the second cover body are laterally enclosed to form an installation cavity wrapping the motor, the top of the installation cavity bulges upward to form a raised portion, the top surface of the raised portion is provided with a plurality of air inlet holes, the bottom of the installation cavity is provided with an air outlet, the side wall of the raised portion is inclined from bottom to top toward the air inlet hole to form an air guide surface, the motor rotates to work, the air guide surface is used to guide the airflow outside the motor cover into the air inlet hole, and the air outlet is used to discharge the airflow in the motor cover.

[0006] The food processing machine of the present invention also has the following additional technical features:

[0007] The projections of the plurality of air inlet holes on the horizontal plane at least partially overlap with the projections of the stator windings of the motor on the horizontal plane.

[0008] The diameter of the air inlet hole is 0.5 mm to 3 mm.

[0009] The air inlet hole is a non-circular hole or a circular hole.

[0010] The top surface of the raised portion is provided with an axial hole for the rotating shaft of the motor to extend upward, a plurality of air inlet holes are distributed on the outside of the axial hole, and a sealing member is provided between the axial hole and the rotating shaft.

[0011] The side wall of the protrusion is connected to the top surface of the protrusion through an arc transition.

[0012] The side wall of the raised portion comprises a wind guide surface, a vertical transition surface and a reflection surface perpendicular to the transition surface which are sequentially connected along the radial direction of the motor cover.

[0013] The inner wall of the motor cover is provided with a plurality of vertical guide ribs, which are arranged at circumferential intervals along the inner wall of the motor cover and are located between the lower end of the motor body of the motor and the air outlet to guide the airflow between the lower end of the motor body and the air outlet to the outside of the motor cover.

[0014] The first cover body and the second cover body are fixed by a plurality of snap structures arranged along the axial direction of the motor cover, and the number of snap structures corresponding to the motor body area of ​​the motor is greater than the number of snap structures corresponding to other areas of the motor.

[0015] The lower end of the motor cover is tapered, the bottom end of the rotating shaft of the motor is connected to a cooling fan, and the diameter of the air outlet is not greater than the inner diameter of the blades of the cooling fan.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0017] 1. The food processing machine of the present invention has a motor cover that fully wraps the motor laterally. On the one hand, the wrapping range of the motor is increased, which can enhance the physical isolation effect and reduce the probability of the motor noise being transmitted outward. On the other hand, since the first cover body and the second cover body can be spliced ​​laterally, when assembling the motor cover, there is no need to insert the motor from bottom to top, but it can be directly spliced ​​on both sides of the motor. It is not affected by the size of the cooling fan at the bottom of the motor, and the motor cover can be installed more quickly and conveniently, optimizing the assembly process.

[0018] Furthermore, the raised portion wraps around the top of the motor, which can prevent the noise of the motor from being directly transmitted outward from the top during the operation of the machine, thereby achieving an isolation effect. Compared with the existing motor cover structure, the noise reduction effect of the motor can be improved; at the same time, a plurality of air inlet holes are arranged on the top surface of the raised portion, which are used for external air flow, and small hole noise reduction can be achieved when sound propagates through the air inlet holes, thereby further improving the noise reduction effect.

[0019] Furthermore, by forming an air guide surface on the side wall of the raised portion, the air guide surface can guide the airflow to quickly flow into the air inlet hole during the process of the external airflow flowing upward along the outer side of the motor cover, which is beneficial to improving the heat dissipation efficiency of the motor in the motor cover, so that the wind can enter the installation cavity from the circumference of the top surface of the raised portion, which not only provides a wide range of air intake but also makes the wind pressure in the installation cavity relatively balanced, ensuring the air intake volume and air intake efficiency, and further improving the noise reduction effect. During the rotation of the motor, the external airflow flows in from the air inlet hole at the top of the installation cavity, and after cooling the motor, the airflow is discharged from the air outlet at the bottom of the installation cavity, continues to flow along the heat dissipation duct, and is finally discharged into the atmosphere, realizing a complete heat dissipation process.

[0020] 2. As a preferred embodiment, the projections of the multiple air inlet holes on the horizontal plane at least partially overlap with the projections of the stator winding of the motor on the horizontal plane; since the stator winding of the motor has a relatively high heat, by making at least some of the air inlet holes face the stator winding, cold air can be forced to blow directly toward the stator winding through the air inlet holes, thereby taking away its heat in time and enhancing its heat dissipation effect.

[0021] 3. As a preferred embodiment, the aperture of the air inlet hole is 0.5 mm to 3 mm; the noise reduction effect can be improved by optimizing the aperture of the air inlet hole, and the smaller the aperture, the more obvious the noise reduction effect. However, in order to ensure the air intake efficiency at the same time, it is necessary to reasonably optimize the aperture of the air inlet hole.

[0022] As a preferred embodiment of the present embodiment, the air inlet hole is a non-circular hole or a circular hole; by optimizing the shape of the air inlet hole, noise reduction is facilitated. For example, when the air inlet hole is a polygonal hole, there are multiple connecting inflection points between multiple edges, which is conducive to the reflection and attenuation of sound, thereby helping to improve the sound absorption and noise reduction effect.

[0023] 4. As a preferred embodiment, the top surface of the raised portion is provided with an axial hole for the rotating shaft of the motor to extend upward, and the plurality of air inlet holes are distributed on the outside of the axial hole, and a sealing member is provided between the axial hole and the rotating shaft; thus, the setting of the axial hole facilitates the rotating shaft to extend upward so as to be connected to the crushing knife assembly of the cup body assembly, thereby providing driving power, and the setting of the sealing member can, on the one hand, ensure that the airflow can only enter from the air inlet hole, and on the other hand, prevent the noise from being directly transmitted upward from the position of the axial hole, that is, the noise can only be transmitted after being reduced through the air inlet hole, so that the noise transmitted to the outside is very small.

[0024] 5. As a preferred embodiment, the side wall of the raised portion is connected to the top surface of the raised portion by a circular arc transition; thereby, by forming a smooth connection between the air guide surface and the top surface of the raised portion, the airflow can flow more smoothly to the air inlet on the top surface after passing through the air guide surface, making the air intake smoother and more reliable.

[0025] 6. As a preferred embodiment, the side wall of the raised portion includes an air guide surface, a vertical transition surface and a reflective surface perpendicular to the transition surface, which are sequentially connected along the radial direction of the motor cover; thus, during the operation of the machine, when the noise propagates upward, the noise transmitted through the air inlet (only a small part of it, most of the noise has been emitted and converted during the propagation in the motor cover) can reach the reflective surface along the air guide surface, and can reach the housing of the main unit only after being reflected by the reflective surface. The noise transmitted through this attenuation path is already very small when it reaches the housing, and the noise is effectively suppressed, so that the noise basically does not reach the outside.

[0026] 7. As a preferred embodiment, the inner wall of the motor cover is provided with a plurality of vertical guide ribs, and the plurality of guide ribs are arranged at intervals along the circumferential direction of the inner wall of the motor cover and are located between the lower end of the motor body of the motor and the air outlet, so as to guide the airflow between the lower end of the motor body and the air outlet to the outside of the motor cover; by arranging the guide ribs on the inner wall of the motor cover, it can be used to guide the airflow in the motor cover, so as to accelerate the airflow out of the motor cover for heat dissipation and improve the heat dissipation efficiency of the motor, and the guide ribs are arranged between the lower end of the motor body and the air outlet, which can effectively prevent the airflow in the area from flowing back, causing airflow disturbance, turbulence, etc., thereby increasing wind noise and affecting the smoothness of air outlet, that is, ensuring the heat dissipation efficiency of the motor while reducing wind noise; in addition, the guide ribs can increase the inner surface area of ​​the motor cover, which is convenient for forming multiple reflection areas for noise, which is conducive to further reducing noise.

[0027] 8. As a preferred embodiment, the first cover body and the second cover body are fixed by a plurality of snap structures arranged along the axial direction of the motor cover, and the number of snap structures corresponding to the motor body area of ​​the motor is greater than the number of snap structures corresponding to other areas of the motor; thus, the first cover body and the second cover body are fixed by the snap structures, which is convenient for disassembly and assembly, and can simplify the assembly while optimizing the distribution of the snap structures. By increasing the number of snap structures corresponding to the motor body area, the fastening of the motor cover corresponding to the motor body area can be improved, thereby enhancing the noise isolation effect of the motor cover and optimizing the noise reduction.

[0028] 9. As a preferred embodiment, the lower end of the motor cover is tapered, the bottom end of the motor shaft is connected to a cooling fan, and the diameter of the air outlet is no larger than the inner diameter of the blades of the cooling fan. Thus, by optimizing the relationship between the diameter of the air outlet and the inner diameter of the blades of the cooling fan, it is possible to avoid that the heat dissipation effect is deteriorated due to the return of air during the process of hot air flowing out of the motor cover, that is, it is possible to ensure that after the hot air flows out of the motor cover, the hot air can be driven by the cooling fan to fully flow to the exhaust port on the main unit, thereby ensuring the heat dissipation efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the appearance of a host in one implementation mode of the present application.

[0031] Figure 2 A cross-sectional schematic diagram of a host and its internal components according to an embodiment of the present application.

[0032] Figure 3 A schematic diagram of the flow path of airflow during motor heat dissipation in one embodiment of the present application.

[0033] Figure 4 A schematic diagram of the propagation path of noise during machine operation in one embodiment of the present application.

[0034] Figure 5 This is a top schematic diagram of a motor cover according to an embodiment of the present application.

[0035] Figure 6 A schematic diagram of the composition of a motor cover according to an embodiment of the present application.

[0036] Figure 7 A schematic diagram of the distribution of air inlet holes in one implementation of the present application.

[0037] Figure 8 A schematic diagram of the arrangement and dimensions of the motor cover air outlet and the cooling fan in one embodiment of the present application.

[0038] Fig. 9 A schematic diagram of the arrangement of air outlets in one embodiment of the present application.

[0039] Reference numerals:

[0040] 10. Host; 101. Casing; 102. Exhaust vent; 11. Motor; 111. Motor body; 112. Rotating shaft; 12. Motor cover; 121. First cover body; 122. Second cover body; 123. Installation cavity; 124. Air outlet; 125. Air outlet hole; 13. Raised portion; 131. Air inlet hole; 132. Air guide surface; 133. Shaft hole; 134. Transition surface; 135. Reflection surface; 14. Guide ribs; 15. Buckle structure; 113. Cooling fan; 1131. Fan blades; 1132. Air suction cavity. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0042] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0043] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0048] like Figures 1 to 9 As shown, the present application provides a food processing machine, including a main unit 10 with a motor assembly built in and a cup body assembly installed on the main unit 10, the motor assembly including a motor 11 and a motor cover 12 covered on the outside of the motor 11, the motor cover 12 including a first cover body 121 and a second cover body 122, the first cover body 121 and the second cover body 122 are laterally enclosed to form an installation cavity 123 wrapping the motor 11, the top of the installation cavity 123 bulges upward to form a raised portion 13, the top surface of the raised portion 13 is provided with a plurality of air inlet holes 131, the bottom of the installation cavity 123 is provided with an air outlet 124, the plurality of air inlet holes 131 are circumferentially arranged along the top surface of the raised portion 13, the side wall of the raised portion 13 is inclined from bottom to top toward the air inlet holes 131 to form an air guide surface 132, the motor 11 rotates to work, the air guide surface 132 is used to guide the airflow outside the motor cover 12 into the air inlet hole 131, and the air outlet 124 is used to discharge the airflow in the motor cover 12.

[0049] The motor cover 12 is in the form of fully wrapping the motor 11 laterally. On the one hand, the wrapping range of the motor 11 is increased, which can enhance the physical isolation effect and reduce the probability of the noise of the motor 11 being transmitted outward. On the other hand, since the first cover body 121 and the second cover body 122 can be spliced ​​laterally, there is no need to insert the motor 11 from bottom to top when assembling the motor cover 12, but it can be directly spliced ​​on both sides of the motor 11. It is not affected by the size of the cooling fan 113 at the bottom of the motor 11, and the motor cover 12 can be installed more quickly and conveniently, optimizing the assembly process.

[0050] Furthermore, the raised portion 13 wraps around the top of the motor 11, which can prevent the noise of the motor 11 from being directly transmitted outward from the top during the operation of the machine, that is, it has an isolation effect. Compared with the existing motor cover 12 structure, the noise reduction effect of the motor 11 can be improved; at the same time, a plurality of air inlet holes 131 are arranged on the top surface of the raised portion 13, and the air inlet holes 131 are used for external air intake. At the same time, small hole noise reduction can be achieved when sound propagates through the air inlet holes 131, which can further enhance the noise reduction effect.

[0051] Furthermore, by forming an air guide surface 132 on the side wall of the raised portion 13, the air guide surface 132 can guide the air flow to quickly flow into the air inlet hole 131 during the process of the external air flow flowing upward along the outer side of the motor cover 12, which is beneficial to improving the heat dissipation efficiency of the motor 11 in the motor cover 12, and multiple air inlet holes 131 are arranged along the circumference of the top surface of the raised portion 13, so that wind can enter the installation cavity 123 from the circumference of the top surface of the raised portion 13, which not only provides a wide range of air intake but also makes the wind pressure in the installation cavity 123 relatively balanced, thereby ensuring the air intake volume and air intake efficiency, and further improving the noise reduction effect.

[0052] Specifically, Figures 2 to 6 As shown, the motor cover 12 includes a conventional installation cavity 123 that laterally surrounds the motor 11. On this basis, the raised portion 13 on the upper side of the installation cavity 123 wraps the top of the motor 11 in the axial and radial directions, so as to achieve full wrapping of the motor 11, which can fully isolate the motor 11 from the housing 101 of the host 10. Under the barrier effect of the motor cover 12, the noise transmitted to the outside of the motor cover 12 can be reduced. The motor 11 includes a motor body 111 and a rotating shaft 112. In order to enable the motor 11 to provide crushing power to the cup body assembly upward, the upper end of the rotating shaft 112 can pass through the top surface of the raised portion 13. The center of the top surface of the raised portion 13 is provided with an axial hole 133. The upper end of the rotating shaft 112 can extend out of the axial hole 133. The upper end of the rotating shaft 112 is provided with a lower connector so as to be coupled with the upper connector at the lower end of the blade shaft of the crushing blade assembly. The bottom of the motor cover 12 is provided with an air outlet 124, the lower end of the rotating shaft 112 extends out through the air outlet 124, and the lower end of the rotating shaft 112 is connected to a cooling fan 113. Figure 6As shown, half of the shaft hole 133 is provided on the first cover body 121, and the other half is provided on the second cover body 122. For example, a semicircular shaft hole 133 is provided on both the first cover body 121 and the second cover body 122, so that when the first cover body 121 and the second cover body 122 are horizontally spliced, the two semicircular shaft holes 133 are enclosed to form a circular shaft hole 133. The arrangement of the air outlet 124 is similar to the arrangement of the shaft hole 133. A plurality of air inlet holes 131 are distributed on the outside of the shaft hole 133 along the circumference of the shaft hole 133, and when the air is introduced, the airflow can flow into the installation cavity 123 from the corresponding air inlet holes 131 along multiple directions.

[0053] like Figure 3 As shown, when the motor assembly is working, the rotating shaft 112 drives the cooling fan 113 to rotate, and a negative pressure area is formed between the cooling fan 113 and the motor body 111. Under the action of the air pressure difference, the external airflow flows upward along the outer surface of the motor cover 12, and then flows to the air inlet 131 through the wind guide surface 132 and flows into the motor cover 12. The airflow blows downward along the installation cavity 123 to the winding of the motor body 111 (that is, the heat source of the motor assembly) for heat dissipation. The airflow after heat exchange flows out to the cooling fan 113 through the air outlet 124 at the bottom of the motor cover 12, and is exhausted to the outside through the cooling fan 113, thereby realizing the heat dissipation of the motor 11. The entire airflow exchange process has a smooth flow, a short path, and a small wind resistance, so the heat dissipation efficiency is high, which is beneficial to improving the service life of the motor assembly.

[0054] like Figure 6 As shown, an acute angle is formed between the air guide surface 132 and the horizontal plane. The inclined setting of the air guide surface 132 is beneficial to reducing wind resistance, so that the external airflow can quickly flow to the top surface of the raised portion 13 and then flow into the installation cavity 123 through the air inlet hole 131, which can effectively improve the heat dissipation efficiency.

[0055] As a preferred embodiment of the present application, the projection of the plurality of air inlet holes 131 on the horizontal plane at least partially overlaps with the projection of the stator winding of the motor 11 on the horizontal plane.

[0056] Since the stator winding of the motor 11 is a heat source with a high temperature, by making at least part of the air inlet holes 131 face the stator winding, cold air can be blown directly to the stator winding through the air inlet holes 131 to take away its heat in time and enhance its heat dissipation effect.

[0057] like Figure 7 and Figure 8 As shown, the distribution width of the air inlet hole 131 is L1, and the width of the motor body 111 is L2, wherein 0.5*L2≤L1≤1.5*L2. Under the premise of ensuring the heat dissipation efficiency of the motor 11, the volume of the motor cover 12 can be avoided to be too large, thereby avoiding the motor cover 12 from being too close to the casing 101, so that there is sufficient space between the motor cover 12 and the casing 101 to form a silencer cavity, which is beneficial to reduce the noise transmitted to the outside.

[0058] As a preferred embodiment of the present application, the diameter of the air inlet hole 131 is 0.5 mm to 3 mm.

[0059] The noise reduction effect can be improved by optimizing the aperture of the air inlet hole 131 . The smaller the aperture, the more obvious the noise reduction effect. However, in order to ensure the air intake efficiency at the same time, the aperture of the air inlet hole 131 needs to be reasonably optimized.

[0060] It can be understood that the aperture of the air inlet hole 131 can be any size between 0.5 mm and 3 mm. Preferably, the aperture of the air inlet hole 131 is 2 mm.

[0061] Furthermore, the shape of the air inlet 131 is not limited, for example Figure 7 The air inlet hole 131 is illustrated as a circular hole. Of course, in other examples, the air inlet hole 131 can also be a non-circular hole, such as a triangular hole, a square hole, a polygonal hole, etc., which is set according to actual needs.

[0062] Optimizing the shape of the air inlet hole 131 is beneficial to noise reduction. For example, when the air inlet hole 131 is a polygonal hole, there are multiple connecting inflection points between multiple edges, which is beneficial to the reflection and attenuation of sound, thereby helping to improve the sound absorption and noise reduction effect.

[0063] Regarding the air outlet 124 of the present application, in one embodiment, the air outlet 124 is in the form of a single opening; in another embodiment, as Fig. 9 As shown, the air outlet 124 includes a plurality of air outlet holes 125, and the plurality of air outlet holes 125 are arranged circumferentially around the rotating shaft 112. When the airflow is discharged from the motor cover 12 through the plurality of air outlet holes 125, noise reduction can be achieved, which is conducive to reducing the noise level ultimately transmitted to the outside. The aperture of the air outlet hole 125 can be set according to actual needs, for example, the aperture of the air outlet hole 125 is smaller than the aperture of the air inlet hole 131. The shape of the air outlet hole 125 is not limited, and can be a circular hole or a non-circular hole.

[0064] As a preferred embodiment of the present application, the top surface of the raised portion 13 is provided with an axial hole 133 through which the rotating shaft 112 of the power supply machine 11 extends upward, a plurality of air inlet holes 131 are distributed on the outside of the axial hole 133 , and a seal is provided between the axial hole 133 and the rotating shaft 112 .

[0065] The shaft hole 133 is provided to facilitate the upward extension of the rotating shaft 112 so as to be connected to the crushing knife assembly of the cup body assembly, thereby providing driving power, and a seal is provided, which can ensure that the airflow can only enter from the air inlet hole 131 on the one hand, and on the other hand, it can prevent the noise from being directly transmitted upward from the position of the shaft hole 133, that is, the noise can only be transmitted through the air inlet hole 131 after being reduced in noise, so that the noise transmitted to the outside is very small.

[0066] Specifically, when there is a matching gap between the shaft hole 133 and the rotating shaft 112, when the motor assembly is working, part of the noise will be directly transmitted from the matching gap, which is not conducive to noise reduction. By setting a seal, the matching gap between the shaft hole 133 and the rotating shaft 112 can be blocked (without affecting the normal rotation of the rotating shaft 112), thereby preventing noise from being transmitted from this position. The seal is, for example, a sealing ring, which can be set on the rotating shaft 112 or on the inner wall of the shaft hole 133, and this application does not limit this.

[0067] As a preferred embodiment of the present application, the side wall of the protrusion 13 and the top surface of the protrusion 13 are connected by an arc transition.

[0068] By forming a smooth connection between the air guide surface 132 and the top surface of the raised portion 13 , the airflow can flow more smoothly to the air inlet 131 on the top surface after passing through the air guide surface 132 , making the air intake smoother and more reliable.

[0069] An arc is used to connect the inclined air guide surface 132 and the horizontal top surface. The outer surface of the arc facilitates smooth air guidance, and the inner surface of the arc can increase the reflection surface 135 area for noise, thereby facilitating noise attenuation and silencing in the motor cover 12.

[0070] As a preferred embodiment of the present application, the side wall of the raised portion 13 includes a wind guide surface 132 , a vertical transition surface 134 , and a reflection surface 135 perpendicular to the transition surface 134 , which are sequentially connected along the radial direction of the motor cover 12 .

[0071] During the operation of the machine, when the noise propagates upward, the noise transmitted through the air inlet 131 (only a small part of it, most of the noise has been emitted and converted during the propagation in the motor cover 12) can reach the reflecting surface 135 along the wind guide surface 132, and can reach the casing 101 of the main unit 10 only after being reflected by the reflecting surface 135. The noise transmitted through this attenuation path is already very small when it reaches the casing 101, and the noise is effectively suppressed, so the noise basically does not reach the outside.

[0072] Figure 4 The propagation path of noise is shown. When the motor assembly is working, most of the energy of the noise propagating upward is reflected by the inner wall of the motor cover 12 and converted into the internal energy of the motor cover 12, and only a small part passes through the air inlet hole 131, so that the noise is significantly reduced. A cup body assembly is also placed on the main unit 10, which can block the noise upward in the longitudinal direction to a certain extent, while the motor cover 12 and the housing 101 block the noise in the lateral direction, so that the noise finally heard by the user is very small.

[0073] As a preferred embodiment of the present application, an air outlet 124 is provided at the bottom of the motor cover 12, and a plurality of vertical guide ribs 14 are provided on the inner wall of the motor cover 12. The plurality of guide ribs 14 are arranged at circumferential intervals along the inner wall of the motor cover 12 and are located between the lower end of the motor body 111 of the motor 11 and the air outlet 124, so as to guide the airflow between the lower end of the motor body 111 and the air outlet 124 to the outside of the motor cover 12.

[0074] By arranging guide ribs 14 on the inner wall of the motor cover 12, it can be used to guide the airflow in the motor cover 12 to accelerate the airflow out of the motor cover 12 to discharge heat and improve the heat dissipation efficiency of the motor 11. In addition, the guide ribs 14 are arranged between the lower end of the motor body 111 and the air outlet 124, which can effectively prevent the airflow in this area from flowing back and causing airflow disturbances, turbulence, etc., thereby increasing wind noise and affecting the smoothness of air outlet, thereby ensuring the heat dissipation efficiency of the motor 11 while reducing wind noise. In addition, the guide ribs 14 can increase the inner surface area of ​​the motor cover 12, so as to form multiple reflection areas for noise, which is conducive to further reducing noise.

[0075] like Figure 3 and Figure 6 As shown, the lower end of the motor cover 12 is configured to be constricted, so that the diameter of the air outlet 124 is smaller than the diameter of the motor cover body, and there is a certain radial distance from the inner side wall of the motor cover 12 to the edge of the air outlet 124, and the guide ribs 14 extend along the inner side wall of the motor cover 12 toward the air outlet 124, and a guide air duct is formed between two adjacent guide ribs 14, so that the hot air flow in the motor cover 12 can flow to the air outlet 124 through multiple guide air ducts when flowing downward, and the hot air flow can be divided into multiple streams and guided and discharged separately, which can improve the hot air discharge efficiency and prevent the hot air flow from flowing back. In addition, the noise propagating downward is transmitted out of the motor cover 12 after multiple reflections between multiple guide ribs 14, so that the noise transmitted to the outside of the motor cover 12 is greatly reduced, which is conducive to the final noise reduction.

[0076] A certain number of guide ribs 14 are respectively disposed on the inner side walls of the first cover body 121 and the second cover body 122. During processing, the guide ribs 14 and the cover body are integrally formed, for example, to facilitate manufacturing.

[0077] As a preferred embodiment of the present application, the first cover body 121 and the second cover body 122 are fixed by a plurality of snap-fit ​​structures 15 arranged along the axial direction of the motor cover 12, and the number of snap-fit ​​structures 15 in the motor body 111 area corresponding to the motor 11 is greater than the number of snap-fit ​​structures 15 in other areas corresponding to the motor 11.

[0078] The first cover body 121 and the second cover body 122 are fixed by a snap-fit ​​structure 15, which is convenient for assembly and disassembly, and can simplify assembly. At the same time, the distribution of the snap-fit ​​structure 15 is optimized. By increasing the number of snap-fit ​​structures 15 corresponding to the motor body 111 area, the fastening of the motor cover 12 corresponding to the motor body 111 area can be improved, thereby enhancing the noise isolation effect of the motor cover 12 and optimizing noise reduction.

[0079] Preferably, the number of the snap structures 15 corresponding to the motor body 111 area is at least three. Under the premise of ensuring that the vibration generated by the motor 11 when the motor 11 is working will not affect the tightness of the splicing of the motor cover 12, by increasing the distribution density of the snap structures 15 corresponding to the motor body 111 area (the motor body 111 is the main source of vibration noise), it is possible to avoid the existence of small gaps at the splicing position that cause noise to be transmitted, thereby improving the effect of sound insulation and noise reduction.

[0080] The present application does not make any specific limitation on the composition of the snap-fit ​​structure 15 , and reference may be made to the solutions of the related prior art. A portion of the snap-fit ​​structure 15 is disposed at the joint of the first cover body 121 , and another portion is disposed at the joint of the second cover body 122 . The two portions cooperate to achieve a fixed connection to form a complete motor cover 12 .

[0081] As a preferred embodiment of the present application, the lower end of the motor cover 12 is tapered, the bottom end of the rotating shaft 112 of the motor 11 is connected to the cooling fan 113, and an air outlet 124 is provided at the bottom of the motor cover 12, and the diameter of the air outlet 124 is not larger than the inner diameter of the blades 1131 of the cooling fan 113.

[0082] By optimizing the relationship between the diameter of the air outlet 124 and the inner diameter of the blades 1131 of the cooling fan 113, it is possible to avoid the return of air during the process of hot air flowing out of the motor cover 12, which would lead to a deterioration in the cooling effect. That is, it is possible to ensure that after the hot air flows out of the motor cover 12, the hot air can fully flow to the exhaust port 102 on the main unit 10 driven by the cooling fan 113, thereby ensuring the cooling efficiency and cooling effect.

[0083] like Figure 8As shown, the lower end of the motor cover 12 is configured to be constricted, and the diameter from the lower end of the motor cover body to the air outlet 124 gradually decreases, which can play a role in gathering wind so that the hot air flow can be fully discharged from the motor cover 12. The heat dissipation fan 113 includes a plurality of blades 1131 surrounding the rotating shaft 112, and the blades 1131 are bent outwardly and extend from the rotating shaft 112 (the root of the blade 1131 is close to the rotating shaft 112 and has the lowest point, and the highest point of the blade 1131 is located at the top of the air suction cavity 1132, and the other end of the blade 1131 is continuously extended outward from the top of the air suction cavity 1132), so that the heat dissipation fan 113 is formed with a sunken air suction cavity 1132 surrounding the rotating shaft 112, and the inner diameter of the blade 1131 of the heat dissipation fan 113 refers to the diameter of the top end surface of the air suction cavity 1132, that is, the diameter of the air outlet 124 is d 1, the diameter of the top end surface of the air suction chamber 1132 is d2, wherein d1≤d2; therefore, when the cooling fan 113 rotates and works, the hot air flows out of the motor cover 12 from the air outlet 124 and is sucked into the air suction chamber 1132, and then as the cooling fan 113 rotates, the hot air is radially thrown out, flows out through the flow channel between adjacent fan blades 1131 and flows to the exhaust port 102 of the host 10. Since d1≤d2, after the hot air flows into the air suction chamber 1132, it can be exhausted from all sides following the rotation of the cooling fan 113, thereby preventing the hot air from flowing back into the motor cover 12, thereby ensuring the heat dissipation effect.

[0084] The technical solution protected by the present invention is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any one embodiment with the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A food processing machine, comprising a main machine with a motor assembly built in and a cup assembly mounted on the main machine, wherein the motor assembly comprises a motor and a motor cover arranged outside the motor, characterized in that: The motor cover includes a first cover body and a second cover body, which are laterally enclosed to form an installation cavity that wraps the motor, the top of the installation cavity bulges upward to form a raised portion, the top surface of the raised portion is provided with a plurality of air inlet holes, the bottom of the installation cavity is provided with an air outlet, and the side walls of the raised portion are inclined from bottom to top toward the air inlet holes to form an air guide surface, and the motor rotates to work, the air guide surface is used to guide the airflow outside the motor cover into the air inlet holes, and the air outlet is used to discharge the airflow inside the motor cover.

2. A food processing machine according to claim 1, characterized in that: The projections of the plurality of air inlet holes on the horizontal plane at least partially overlap with the projections of the stator windings of the motor on the horizontal plane.

3. A food processing machine according to claim 1, characterized in that: The diameter of the air inlet hole is 0.5 mm to 3 mm.

4. A food processing machine according to claim 3, characterized in that: The air inlet hole is a non-circular hole or a circular hole.

5. A food processing machine according to claim 1, characterized in that: The top surface of the raised portion is provided with an axial hole for the rotating shaft of the motor to extend upward, a plurality of air inlet holes are distributed on the outside of the axial hole, and a sealing member is provided between the axial hole and the rotating shaft.

6. A food processing machine according to claim 1, characterized in that: The side wall of the protrusion is connected to the top surface of the protrusion through an arc transition.

7. A food processing machine according to claim 1, characterized in that: The side wall of the raised portion comprises a wind guide surface, a vertical transition surface and a reflection surface perpendicular to the transition surface which are sequentially connected along the radial direction of the motor cover.

8. A food processing machine according to claim 1, characterized in that: The inner wall of the motor cover is provided with a plurality of vertical guide ribs, which are arranged at circumferential intervals along the inner wall of the motor cover and are located between the lower end of the motor body of the motor and the air outlet to guide the airflow between the lower end of the motor body and the air outlet to the outside of the motor cover.

9. A food processing machine according to claim 1, characterized in that: The first cover body and the second cover body are fixed by a plurality of snap structures arranged along the axial direction of the motor cover, and the number of snap structures corresponding to the motor body area of ​​the motor is greater than the number of snap structures corresponding to other areas of the motor.

10. A food processing machine according to any one of claims 1 to 9, characterized in that: The lower end of the motor cover is tapered, the bottom end of the rotating shaft of the motor is connected to a cooling fan, and the diameter of the air outlet is not greater than the inner diameter of the blades of the cooling fan.

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