Noise-reduction food processor

Abstract

The invention discloses a noise reduction food processor which comprises an air outlet structure arranged in an air outlet channel, the air outlet structure comprises at least two flow channels, each flow channel is internally provided with at least two communicated valve units, each valve unit comprises a flow distribution column, a first enclosure wall and a second enclosure wall, and the first enclosure wall and the second enclosure wall are arranged on the two sides of the flow distribution column. A first branch flow channel is formed between the first surrounding wall and the flow dividing column, a second branch flow channel is formed between the second surrounding wall and the flow dividing column, a flow dividing position is formed at an inlet of the valve unit, and an obtuse included angle is formed between a tangential path extending from the flow dividing position to the first branch flow channel and a tangential path extending from the flow dividing position to the second branch flow channel. The airflow flowing in from the flow dividing position comprises main airflow flowing along the first branch flow channel and auxiliary airflow flowing along the second branch flow channel, and the main airflow and the auxiliary airflow intersect at an acute angle. According to the food processor, the optimized air outlet structure is adopted, and the heat dissipation effect and the noise reduction effect can be optimized in the heat dissipation process of the motor.

Description

Technical Field

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

[0002] The air outlet structure of a traditional food processor uses a spiral channel to dissipate heat from the motor. The outlet end of the air outlet channel is usually configured to be trumpet-shaped in order to increase the air volume and improve the heat dissipation efficiency. However, in order to reduce the noise of the machine, a plurality of wind shielding column structures are usually provided near the air outlet of the air outlet channel. However, while reducing the noise, the heat dissipation effect will be reduced simultaneously, resulting in a high operating temperature of the motor, which is not conducive to extending the life of the motor.

[0003] Existing food processors can usually only improve one of the effects, that is, either optimizing the heat dissipation effect of the motor or optimizing the noise reduction effect during the air outlet process, resulting in imperfect product performance and inability to meet user needs to a greater extent.

[0004] In terms of optimizing the heat dissipation of the motor, the applicant thought of improving the heat dissipation efficiency by quickly draining the hot air, quickly reducing the temperature of the motor, and making the motor work in a favorable temperature environment. The applicant therefore thought of applying the relevant structure of the Tesla valve to the food processor, and in addition to improving the heat dissipation effect of the motor, the applicant also studied how to reduce the noise level during the exhaust process in the hope of achieving a superimposed effect.

[0005] Regarding the Tesla valve, although it has been applied in many fields, the prior art has not yet proposed its application in food processing machines, especially in motor heat dissipation scenarios. Tesla valves are often used in one-way conduction control scenarios of liquids, but the properties of gases and liquids are different, which requires the applicant to improve the relevant structure of the valve in a targeted manner when applying the Tesla valve to gases, so that it can be better applied to the motor heat dissipation scenarios of food processing machines. In addition, when the Tesla valve is applied to liquid circulation, the noise problem is not taken into account, so that the prior art cannot provide relevant guidance in this regard.

[0006] Regarding the existing technology, patent CN214631581U discloses an anti-overflow rice cooker, which sets a Tesla valve channel to accelerate the flow of fluid toward the cooking chamber and hinder the flow of fluid toward the air outlet of the fan, so as to improve the air intake efficiency and optimize the cooking effect; although the patent provides the application of Tesla valve in gas fluid to accelerate the forward flow of fluid, however, the solution does not involve noise processing, and there are also significant differences in application scenarios from those of food processors. Summary of the invention

[0007] In order to solve the technical problem in the prior art that it is difficult to achieve both the heat dissipation effect and the noise reduction effect of the motor during the heat dissipation of the motor of the food processing machine, the present invention provides a noise-reducing food processing machine. Inspired by the application of conventional Tesla valves, an improved valve unit is proposed, which is firstly applied to the scenario of motor heat dissipation of the food processing machine to improve the heat dissipation effect and the noise reduction effect during the heat dissipation of the motor.

[0008] The present invention discloses a noise-reducing food processing machine, comprising a main machine and a processing component, wherein a motor for driving the processing component is disposed in the main machine, and the main machine is also provided with an air outlet channel connected to the outside, and the food processing machine also includes an air outlet structure arranged in the air outlet channel, wherein the air outlet structure includes at least two flow channels, each of the flow channels is provided with at least two connected valve units, each of the valve units includes a diverter column and a first surrounding wall and a second surrounding wall disposed on both sides of the diverter column, a first branch flow channel is formed between the first surrounding wall and the diverter column, a second branch flow channel is formed between the second surrounding wall and the diverter column, a diverter position is formed at the inlet of the valve unit, an obtuse angle is formed between a tangential path extending from the diverter position to the first branch flow channel and a tangential path extending from the diverter position to the second branch flow channel, and an airflow flowing in from the diverter position includes a main airflow flowing along the first branch flow channel and an auxiliary airflow flowing along the second branch flow channel, and the main airflow and the auxiliary airflow intersect at an acute angle.

[0009] The noise-reducing food processing machine of the present invention also has the following additional technical features:

[0010] The inner walls of the first surrounding wall and the second surrounding wall both include arc segments, and the arc corresponding to the arc segment of the first surrounding wall is smaller than the arc corresponding to the arc segment of the second surrounding wall.

[0011] The first surrounding wall and the second surrounding wall are located on the circumference of an outer circle formed by the same radius.

[0012] The cross section of the splitter column is circular.

[0013] The outer circle formed by the first surrounding wall and the second surrounding wall is arranged concentrically with the inner circle formed by the diverter column.

[0014] In the same flow channel, along the discharge direction of the airflow, the diameters of the outer circles formed by the plurality of valve units decrease in sequence.

[0015] The first branch flow channels and the second branch flow channels of two adjacent valve units in the same flow channel are arranged alternately.

[0016] The cross section of the diverter column is in a water drop shape, and / or the diverter column is hollow.

[0017] An air outlet is arranged on the bottom side of the main unit, a gap is arranged between the valve unit near the air outlet and the air outlet, and outlets of the plurality of flow channels respectively form different angles with the bottom side of the main unit.

[0018] The main unit is also provided with an air inlet channel, which includes at least two flow channels, each of which is provided with at least two interconnected valve units, and the external airflow quickly flows into the main unit through the valve units.

[0019] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0020] 1. The noise-reducing food processing machine of the present invention is provided with an air outlet structure in the air outlet channel. The air outlet structure can effectively reduce noise while improving the heat dissipation effect during the heat dissipation of the motor, and can reduce the noise level during the air outlet, thereby optimizing the performance of the product from multiple aspects. Specifically, by providing a valve unit, when the airflow is flowing in the forward direction, according to the optimized distribution of the first branch flow channel and the second branch flow channel, it is beneficial to reduce the conduction pressure of the airflow, and when the main airflow and the auxiliary airflow intersect at an acute angle, the auxiliary airflow accelerates the main airflow, which is beneficial to the rapid discharge of the airflow to improve the heat dissipation efficiency; at the same time, when the airflow flows through the valve unit, the noise is constantly reflected and refracted by the first surrounding wall and the second surrounding wall, and the mutual cancellation of sound waves of different phases can greatly consume the energy of the sound waves, and the flow channel formed by the valve unit has an extended path so that the sound wave propagation path is extended. Combining these effects can significantly reduce noise and noise, thereby reducing the wind noise at the air outlet, and greatly reducing the noise transmitted to the outside.

[0021] 2. As a preferred embodiment, the inner walls of the first surrounding wall and the second surrounding wall both include arc segments, and the curvature corresponding to the arc segment of the first surrounding wall is smaller than the curvature corresponding to the arc segment of the second surrounding wall; thus, the inner walls of the first surrounding wall and the second surrounding wall both include arc segments, which is conducive to the smooth transition of the first branch flow channel and the second branch flow channel along the direction of airflow flow, especially for the second branch flow channel, which has a long path and a large angle change during the airflow flow. The use of an arc inner wall can play a role in guiding the airflow, so as to guide the airflow to flow rapidly, so that the airflows flowing out of the first branch flow channel and the second branch flow channel can smoothly converge.

[0022] As a preferred embodiment of the present embodiment, the first surrounding wall and the second surrounding wall are located on the circumference of an outer circle formed by the same radius; thus, the first surrounding wall and the second surrounding wall are on the same circumference, which is convenient for processing and easy to adjust the above-mentioned obtuse angle so as to optimize the unidirectional flow characteristics of the airflow.

[0023] Furthermore, the cross-section of the diverter column is circular; thus, the diverter column adopts a cylindrical structure, which is convenient for mold processing and has a small wind resistance, which is conducive to the branch flow channels on both sides of the diverter column to form arc paths, reduce drastic changes in the flow channel cross-section, thereby reducing the noise caused by sudden changes in airflow and optimizing noise reduction.

[0024] Furthermore, the outer circle formed by the first surrounding wall and the second surrounding wall is concentrically arranged with the inner circle formed by the diverter column; in this embodiment, the outer circle and the diverter column are arranged in concentric circles, so that the first branch flow channel and the second branch flow channel can both form arc-shaped flow channels with uniformly changing cross-sections, so as to reduce the drastic changes in the flow channel cross-sections, thereby reducing the noise caused by sudden changes in the airflow, and the path of the first branch flow channel is short and the degree of curvature is low, so that most of the airflow (i.e., the main airflow) flows along the first branch flow channel with small pressure loss and small obstruction, and the auxiliary airflow flowing through the second branch flow channel can accelerate the main airflow, and ultimately all the airflow can be discharged quickly, while ensuring the airflow flow rate and small airflow loss, which is conducive to improving the heat dissipation effect.

[0025] 3. As a preferred embodiment, in the same flow channel, along the discharge direction of the air flow, the diameter of the outer circle formed by each of the multiple valve units decreases successively; thus, the cross-sectional area of ​​the air channel formed by the valve unit continuously decreases along the discharge direction of the air flow, which is beneficial to noise reduction while ensuring a certain heat dissipation effect.

[0026] 4. As a preferred embodiment, the first branch flow channel and the second branch flow channel of two adjacent valve units in the same flow channel are arranged alternately; thereby, the flow path of the airflow along the first branch flow channel becomes longer, which helps to increase the number of times the noise is reflected and refracted, and increase the energy attenuation of the noise along the way, thereby helping to improve the noise reduction effect; the flow path of the airflow along the second branch flow channel becomes longer, which helps to increase the number of times the noise is reflected and refracted, and increase the energy attenuation of the noise along the way, thereby helping to improve the noise reduction effect.

[0027] 5. As a preferred embodiment, the cross-section of the diverter column is in the shape of a water drop. Thus, the use of a diverter column of this shape helps to strengthen the guidance of the main airflow and the auxiliary airflow at the ends of the first branch flow channel and the second branch flow channel, so as to promote the confluence of the main airflow and the auxiliary airflow, and realize the acceleration effect of the auxiliary airflow on the main airflow, which can make the exhaust smooth and improve the exhaust efficiency.

[0028] 6. As a preferred embodiment, an air outlet is provided on the bottom side of the main unit, and a gap is provided between the valve unit near the air outlet and the air outlet, and the outlets of the multiple flow channels respectively form different angles with the bottom side of the main unit; thereby, by forming a gap, when the airflow flows to the gap, it is beneficial to reduce the wind pressure and reduce the wind speed, and it can avoid that the wind speed is too high and hits the air outlet to generate a large noise, thereby further reducing the wind noise at the outlet; and the outlets of the multiple flow channels are arranged in multiple directions, so that the airflow can reach various positions of the air outlet in multiple directions and be discharged, thereby avoiding interference between the airflows or the formation of turbulence to increase wind noise, and thus it is beneficial to reduce the wind noise while ensuring the air outlet efficiency.

[0029] 7. As a preferred embodiment, the host is also provided with an air inlet channel, which includes at least two flow channels, each of which is provided with at least two interconnected valve units, and the external airflow quickly flows into the host through the valve unit; thus, the improved valve unit is used for air intake, which is conducive to the rapid flow of airflow into the host, thereby improving the heat dissipation efficiency, and when the airflow flows in the forward direction, there is little obstruction and pressure loss, thereby ensuring the air intake efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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:

[0031] Figure 1 This is a schematic structural diagram of a food processor according to one embodiment of the present application.

[0032] Figure 2 This is a schematic diagram of an explosion of a host device according to an implementation mode of the present application.

[0033] Figure 3 for Figure 2 A cross-sectional view of the mainframe after assembly.

[0034] Figure 4 This is a schematic diagram of a configuration method of an air outlet structure in one implementation of the present application.

[0035] Figure 5 This is a schematic diagram of the arrangement of the air outlet structure in another embodiment of the present application.

[0036] Figure 6 It is a schematic top view of the arrangement of the air outlet structure in the air outlet channel according to one embodiment of the present application.

[0037] Figure 7 This is a schematic diagram of the structure of a single valve unit in one embodiment of the present application.

[0038] Figure 8 A schematic diagram of the shape of a diversion column in one implementation manner of the present application.

[0039] Fig. 9 This is a schematic diagram of the shape of a splitter column in another embodiment of the present application.

[0040] Fig.10 It is a schematic diagram of the structure of a single flow channel under an embodiment of the present application, and shows the path of the airflow flowing in the forward direction along the flow channel.

[0041] Fig.11 This is a schematic diagram of the arrangement of multiple flow channels in one embodiment of the present application.

[0042] Fig.12 This is a schematic diagram of the structure of an outer cover in one embodiment of the present application.

[0043] Fig.13 A schematic diagram of the arrangement of an air inlet channel in one embodiment of the present application.

[0044] Fig.14 This is a schematic structural diagram of a food processor that does not require hand washing according to an embodiment of the present application.

[0045] Fig.15 for Fig.14 Schematic diagram of the setting of the air outlet structure of a food processor.

[0046] Reference numerals:

[0047] 10. Host; 11. Cup assembly; 12. Motor; 13. Air outlet channel; 14. Air outlet; 101. Casing; 102. Base; 15. Gap; 16. Motor cover; 17. Outer cover; 18. Cooling fan; 103. Air inlet; 171. Rib; 19. Air inlet channel; 20. Air outlet structure; 21. Flow channel; 22. Valve unit; 23. Diverter column; 24. First wall; 25. First Two surrounding walls; 26, first branch flow channel; 27, second branch flow channel; 221, diversion position; 222, confluence position; 201, main airflow; 202, auxiliary airflow; 261, first tangential path; 271, second tangential path; 211, inlet; 212, outlet; 231, tip; 301, first circle; 302, second circle; 303, third circle; 304, fourth circle; 305, transition section. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] like Figures 1 to 15 As shown, the present application provides a noise-reducing food processing machine, including a main machine 10 and a processing assembly, wherein the main machine 10 is provided with a motor 12 for driving the processing assembly, and the main machine 10 is also provided with an air outlet channel 13 communicating with the outside, and the food processing machine further includes an air outlet structure 20 arranged in the air outlet channel 13, and the air outlet structure 20 includes at least two flow channels 21, and each flow channel 21 is provided with at least two connected valve units 22, and each valve unit 22 includes a diverter column 23 and a first surrounding wall 24 and a second surrounding wall 25 arranged on both sides of the diverter column 23, and the first surrounding wall 24 and the diverter column 23 are connected to each other. A first branch channel 26 is formed between the columns 23, a second branch channel 27 is formed between the second surrounding wall 25 and the diverter column 23, a diverter position 221 is formed at the entrance of the valve unit 22, and an obtuse angle is formed between the tangential path extending from the diverter position 221 to the first branch channel 26 and the tangential path extending from the diverter position 221 to the second branch channel 27. The airflow flowing in from the diverter position 221 includes a main airflow 201 flowing along the first branch channel 26 and an auxiliary airflow 202 flowing along the second branch channel 27, and the main airflow 201 and the auxiliary airflow 202 intersect at an acute angle.

[0056] The noise of food processors such as wall breakers mainly comes from two parts: motor noise and ventilation noise. The motor noise includes friction noise between carbon brushes and commutator, electromagnetic noise, bearing friction noise, vibration noise caused by rotor imbalance, etc. Ventilation noise includes rotation noise, eddy noise and resonance noise. The rotation noise is caused by the high-speed rotation of the fan blades hitting the air, the eddy noise is caused by the sudden change of air flow caused by the drastic change of the air duct cross section, and the resonance noise is caused by the pressure pulsation caused by the air flow encountering obstacles on the air path. The existing spiral air duct is combined with a trumpet-shaped air outlet structure. This structure is conducive to reducing the eddy noise and resonance noise in the ventilation noise, but the motor noise and the rotation noise in the ventilation noise cannot be reduced, and the noise transmitted from the air outlet is still relatively large.

[0057] The improved air outlet structure 20 provided in the present application has a noise reduction effect on both the motor body noise and the ventilation noise. The noise entering the valve unit 22 is deflected, reflected, offset, and disturbed by the branch flow channel, the sound wave energy is consumed, and the propagation path of the sound wave is extended, which can comprehensively improve the exhaust noise reduction effect. At the same time, the arrangement of the first branch flow channel 26 and the second branch flow channel 27 is conducive to the rapid discharge of the airflow, and the airflow pressure loss is small, thereby ensuring the heat dissipation effect at the same time.

[0058] Figure 7 To simplify the composition of a valve unit 22, the flow process of the airflow is described based on this. The total airflow flows from the inlet of the valve unit 22 and is divided into a main airflow 201 and an auxiliary airflow 202 at the split position 221, as shown in FIG. Figure 7 As shown, an angle β is formed between the first tangential path 261 and the second tangential path 271, β is an obtuse angle, wherein β and α (α is the angle between the tangent of the second surrounding wall 25 and the extension direction of the inlet of the flow channel 21) are transformed into a complementary angle (i.e., α is an acute angle). By adopting this angle distribution, it is possible to reduce the forward conduction pressure of the airflow, which is beneficial to reduce the stall of the airflow and improve the heat dissipation efficiency. Furthermore, the main airflow 201 flows along the first branch flow channel 26, and the main airflow 201 occupies more than 90% of the total airflow flow. The auxiliary airflow 202 flows along the second branch flow channel 27, and the main airflow 201 and the auxiliary airflow 202 gradually approach each other and meet at the confluence position 222 on the opposite side of the diversion position 221, as shown in FIG. Figure 7 As shown, when the main airflow 201 and the auxiliary airflow 202 meet, an angle γ is formed, where γ is an acute angle. At this time, the auxiliary airflow 202 accelerates the main airflow 201, thereby facilitating rapid discharge of the airflow and improving the heat dissipation effect.

[0059] Figure 7 The flow direction and flow path of the airflow during the heat dissipation of the motor are shown. By forming an obtuse angle β, the reverse-flowing airflow can be prevented from entering the main unit 10 through the valve unit 22, which ensures the unidirectional conduction performance of the valve unit 22, that is, during the operation of the machine, at the position of the air outlet structure 20, only the airflow is discharged, thereby achieving reliable heat dissipation of the motor. It can be understood that during the actual operation of the machine, the airflow will only be discharged along the air outlet structure 20 (powered by the cooling fan), and there is no driving force outside the air outlet 14, so the airflow will not flow into the main unit 10 in the reverse direction. Furthermore, when the main airflow 201 and the auxiliary airflow 202 meet, the two branch airflows converge in the same direction, which can ultimately ensure that the airflow is quickly and smoothly discharged.

[0060] It should be noted that the types of food processing machines of the present application are not limited to wall breaking machines and soy milk machines, but may also include meat grinders, noodle machines, juice machines, etc. Figure 1It is a wall-breaking machine, which includes a main unit 10 disposed below and a cup body assembly 11 disposed above, and the processing assembly is a crushing knife disposed in the cup body assembly 11. For other products, such as noodle machines and juice machines, the processing assembly is a screw rod, which are conventional structures and will not be described here. By expanding the types of products, it is intended to enable more products to apply the structure for motor heat dissipation of the present application to improve the comprehensive heat dissipation effect of the motor.

[0061] As a preferred embodiment of the present application, the inner walls of the first surrounding wall 24 and the second surrounding wall 25 both include arc segments, and the arc corresponding to the arc segment of the first surrounding wall 24 is smaller than the arc corresponding to the arc segment of the second surrounding wall 25 .

[0062] like Figure 7 and Fig.10 As shown, the inner walls of the first surrounding wall 24 and the second surrounding wall 25 both include arc segments, which are beneficial to the smooth transition of the first branch channel 26 and the second branch channel 27 along the flow direction of the airflow. Especially for the second branch channel 27, the path is long and the angle changes greatly during the flow of the airflow. The use of an arc inner wall can play a role in guiding the airflow, so as to guide the airflow to flow quickly and make the airflows flowing out of the first branch channel 26 and the second branch channel 27 meet smoothly.

[0063] like Fig.10 As shown, exemplarily, three valve units 22 are arranged in a flow channel 21, wherein the circle where the arc segment of the first surrounding wall 24 of the first valve unit 22 is located is the first circle 301, and the circle where the arc segment of the second surrounding wall 25 is located is the second circle 302, and the first circle 301 and the second circle 302 may be different circles and non-concentrically arranged. In the second valve unit 22, the circle where the arc segment of the first surrounding wall 24 is located and the circle where the arc segment of the second surrounding wall 25 is located may be the same circle, i.e., the third circle 303. In the third valve unit 22, the circle where the arc segment of the first surrounding wall 24 is located and the circle where the arc segment of the second surrounding wall 25 is located may be the same circle, i.e., the fourth circle 304. That is, it can be understood that, in different valve units 22, the circle where the arc segment of the first surrounding wall 24 is located and the circle where the arc segment of the second surrounding wall 25 is located may be the same circle or different circles, and the present application does not limit this.

[0064] Furthermore, the inner wall of the first surrounding wall 24 and / or the second surrounding wall 25 further includes a transition section 305, such as Fig.10 As shown, at the connection between the two valve units 22, the inner wall of the first surrounding wall 24 or the second surrounding wall 25 includes a transition section 305, which protrudes toward the inside of the flow channel to form a convex hull so that the inner diameter of the flow channel changes, and at the same time plays a role in guiding the airflow to flow toward the opposite side of the transition section 305, so that the branch airflow flows forward in a serpentine shape.

[0065] As a preferred embodiment of the present embodiment, the first surrounding wall 24 and the second surrounding wall 25 are located on the circumference of an outer circle formed by the same radius. Therefore, the first surrounding wall 24 and the second surrounding wall 25 are located on the same circumference, which is convenient for processing and easy to adjust the obtuse angle so as to optimize the unidirectional flow characteristics of the airflow.

[0066] Furthermore, the cross section of the diverter column 23 is circular. Therefore, the diverter column 23 adopts a cylindrical structure, which is convenient for mold processing and has a small wind resistance, which is conducive to the branch flow channels on both sides of the diverter column 23 to form arc paths, reduce the drastic changes in the flow channel cross section, thereby reducing the noise caused by sudden changes in airflow and optimizing noise reduction.

[0067] Furthermore, the outer circle formed by the first surrounding wall 24 and the second surrounding wall 25 is concentrically arranged with the inner circle formed by the diverter column 23 .

[0068] like Fig.10 As shown, the first surrounding wall 24 and the second surrounding wall 25 are both arc-shaped, and the first surrounding wall 24 near the inlet 211 of the flow channel 21 is a minor arc, and the second surrounding wall 25 is a major arc. At this time, the path of the first branch flow channel 26 is short and the curvature is low. Most of the airflow (i.e., the main airflow 201) flows along the first branch flow channel 26, with small pressure loss and small obstruction, which is conducive to reducing airflow loss and airflow stall, ensuring the improvement of heat dissipation effect. The path of the second branch flow channel 27 is long and the curvature is high. When the auxiliary airflow 202 flows to the end of the second branch flow channel 27, it can intersect with the main airflow 201 at an acute angle, ensuring the acceleration effect of the auxiliary airflow 202 on the main airflow 201.

[0069] It should be noted that, among the multiple valve units 22 in the same flow channel 21, the arc length of the first surrounding wall 24 of the first valve unit 22 close to the inlet 211 of the flow channel 21 is smaller than the arc length of the second surrounding wall 25. Along the discharge direction of the airflow, the size relationship between the first surrounding wall 24 and the second surrounding wall 25 of the second valve unit 22, the third valve unit 22 and other subsequent valve units 22 is not required by this application, and the first surrounding walls 24 of adjacent valve units 22 are not limited to being arranged on the same side or different sides, and the second surrounding walls 25 are not limited to being arranged on the same side or different sides. Ultimately, reasonable settings are made based on factors such as the rate at which the airflow flows through the entire flow channel 21, pressure loss, and noise level, so as to ensure the heat dissipation and noise reduction effects.

[0070] Further, in one embodiment, if Fig.10 As shown, in the same flow channel 21, along the direction of airflow discharge, the diameters of the outer circles formed by the multiple valve units 22 decrease successively. That is, the cross-sectional area of ​​the air channel formed by the multiple valve units 22 in the same flow channel 21 decreases continuously along the direction of airflow discharge, which is beneficial to noise reduction while ensuring a certain heat dissipation effect. Among them, the change in the diameter of adjacent outer circles is based on ensuring a certain air outlet efficiency.

[0071] It can be understood that in other embodiments, the diameter change of adjacent outer circles may be that along the discharge direction of the airflow, the outer circle of the first valve unit 22 is larger than the outer circle of the second valve unit 22, and the outer circle of the second valve unit 22 is smaller than the outer circle of the third valve unit 22, that is, it presents a trend of continuous change.

[0072] As a preferred embodiment of the present application, the first branch flow channels 26 and the second branch flow channels 27 of two adjacent valve units 22 in the same flow channel 21 are arranged alternately.

[0073] like Fig.10 As shown, an example is shown in which three valve units 22 are arranged in one flow channel 21. Fig.10 Taking the orientation in as a reference, the first branch flow channel 26 of the first valve unit 22 is located on the lower side and the second branch flow channel 27 is located on the upper side, the first branch flow channel 26 of the second valve unit 22 is located on the upper side and the second branch flow channel 27 is located on the lower side, and the first branch flow channel 26 of the third valve unit 22 is located on the lower side and the second branch flow channel 27 is located on the upper side. Therefore, when the main airflow 201 flows along the first branch flow channel 26, the airflow flows in an S shape or a serpentine shape, and the flow path becomes longer, which helps to increase the number of reflections and refractions of the noise, and increase the energy attenuation of the noise along the way, thereby helping to improve the noise reduction effect; similarly, when the auxiliary airflow 202 flows along the second branch flow channel 27, the airflow flows in an S shape or a serpentine shape, and the flow path becomes longer, which helps to increase the number of reflections and refractions of the noise, and increase the energy attenuation of the noise along the way, thereby helping to improve the noise reduction effect.

[0074] Furthermore, Fig.10 The inlet 211 of the flow channel 21 and the outlet 212 of the flow channel 21 are arranged in a certain offset, which is also conducive to reducing the wind noise. Figure 6 and Fig.11 As shown, a plurality of flow channels 21 are arranged in parallel along the width direction of the air outlet channel 13 .

[0075] The flow dividing column 23 of the present application can be designed into other shapes besides a cylindrical structure, such as Figure 8 The cross section of the diverter column 23 is in the shape of a water drop. The diverter column 23 with this structure is provided with a tip 231 toward the confluence position 222, which is beneficial to promote the rapid confluence of the main airflow 201 and the auxiliary airflow 202, so that the exhaust is smooth and the exhaust efficiency is improved.

[0076] Furthermore, the splitter column 23 can be configured as a solid structure or a hollow structure. When a hollow structure is adopted, Fig. 9 As shown, it is easier to control the wall thickness of the diverter column 23, and the wall thickness of the diverter column 23 can be processed to be the same as the wall thickness of the surrounding wall outside it, which can improve the quality of the product and reduce structural defects during injection molding.

[0077] On the basis of the above scheme, further, the host 10 is provided with an air outlet 14 connected to the outside. The host 10, for example, includes a housing 101 and a base 102 disposed at the bottom of the housing 101. The air outlet 14 can be disposed on the housing 101 or on the base 102. Figure 1 As shown, the air outlet 14 is arranged at the lower end of the housing 101 near the base 102. Preferably, a gap 15 is formed between the valve unit 22 at the outlet 212 of each flow channel 21, that is, the valve unit 22 closest to the air outlet 14, and the air outlet 14, and the gap 15 forms a buffer cavity. When the airflow reaches the buffer cavity, the wind pressure and wind speed can be reduced, and the wind speed can be prevented from hitting the air outlet 14 due to excessive wind speed and generating a large noise, thereby further reducing the wind noise at the outlet.

[0078] Furthermore, the outlets 212 of the multiple flow channels 21 are respectively oriented in different directions. When the air outlet 14 is provided in the housing 101, the directions of the outlets 212 of the multiple flow channels 21 form different angles with the housing 101. When the air outlet 14 is provided with multiple air outlet holes, the airflow can be dispersed and discharged to the multiple air outlet holes along the multiple flow channels 21, avoiding interference between the airflows or forming turbulence to increase wind noise, thereby helping to reduce the air outlet noise while ensuring the air outlet efficiency.

[0079] As a preferred embodiment of the present application, the host 10 includes a casing 101, a motor cover 16 and an outer cover 17 arranged in the casing 101, the motor cover 16 surrounds the outside of the motor 12, the outer cover 17 surrounds the outside of the motor cover 16, the outer cover 17 and the bottom of the casing 101 are enclosed to form an air outlet channel 13, the air outlet structure 20 is arranged at the bottom of the casing 101, or the air outlet structure 20 is arranged on the outer cover 17.

[0080] Specifically, the outer cover 17 or the base 102 is provided with an air guide cavity, and a cooling fan 18 is provided in the air guide cavity. The motor cover 16 is sealed and connected with the air guide cavity. When the motor 12 dissipates heat, the airflow flows downward along the motor cover 16 into the air guide cavity, and then quickly flows to the air outlet channel 13 driven by the rotation of the fan, and then discharged through the air outlet structure 20. The cooling fan 18 can be directly connected to the lower end of the motor 12 shaft, or it can be separately set in the air guide cavity, which is not limited in this application. In one embodiment, Figure 4 As shown, a base 102 is provided at the bottom of the housing 101, and an air outlet structure 20 is provided on the base 102. The air outlet structure 20 can be integrally formed with the base 102, or can be fixed on the base 102. Thus, when the outer cover 17 is covered on the base 102, the air outlet structure 20 is enclosed in the air outlet channel 13. In another embodiment, as Figure 5As shown, the air outlet structure 20 is integrally arranged at the bottom of the outer cover 17. When the outer cover 17 is covered on the base 102, the air outlet structure 20 is enclosed in the air outlet channel 13. By flexibly arranging the air outlet structure 20, the structural configuration or processing can be made more flexible, which is convenient for improvement on the basis of the existing structure, and improves adaptability and versatility.

[0081] The present application provides an air outlet structure 20, such as Fig.10 As shown, when the airflow flows in the forward direction, the airflow obtains an acceleration effect, which is beneficial to improve the heat dissipation efficiency. At the same time, during the heat dissipation process of the motor 12, the noise of the motor 12, the noise of the fan, and the noise during the flow of the airflow can be effectively attenuated by flowing through the multiple valve units 22, and finally a good noise reduction effect can be achieved.

[0082] It is understandable that while optimizing the air outlet structure 20, the present application can also optimize the air inlet structure of the machine, such as Fig.12 and Fig.13 As shown, the host 10 is also provided with an air inlet channel 19, which includes at least two flow channels, each of which is provided with at least two connected valve units, and the external airflow quickly flows into the host 10 through the valve unit. The valve unit here also adopts an improved Tesla valve structure, which can adopt the same or similar structure as the valve unit 22 of the above-mentioned air outlet structure 20, and will not be repeated here.

[0083] like Fig.12 and Fig.13 As shown, in one embodiment, the host 10 includes a casing 101, a motor cover 16 and an outer cover 17 arranged in the casing 101, the motor cover 16 surrounds the outside of the motor 12, and the outer cover 17 surrounds the outside of the motor cover 16. An air inlet 103 is provided at the bottom of the casing 101, one end of the air inlet channel 19 is connected to the air inlet 103, and the other end is connected to the inside of the outer cover 17, and the outer wall of the outer cover 17 is integrally formed with a U-shaped rib 171, and the rib 171 and the outer wall of the outer cover 17 enclose the air inlet channel 19.

[0084] This embodiment provides a method for forming an air inlet channel 19, the air inlet channel 19 is integrally formed on the outer cover 17, for example, distributed along two opposite sides of the outer cover 17, and the airflow flows into the air inlet channel 19 from the air inlet 103 and then flows upward into the outer cover 17, and then flows into the motor cover 16 to cool the motor 12. The air inlet channel 19 is formed by using U-shaped ribs 171, which is conducive to reducing the radial size of the overall structure formed by the outer cover 17 and the air inlet channel 19, which can not only reduce the occupation of the internal space of the host 10 and realize the miniaturization of the whole machine, but also shorten the path of the cold air flowing into the outer cover 17, thereby facilitating the improvement of the heat dissipation efficiency.

[0085] It should be noted that the above-mentioned air outlet structure 20 and air inlet structure of the present application can be applied to Figure 1The common wall breaking machine type shown can also be used for Fig.14 In the hand-free soymilk machine shown in FIG. 1 , its application scenarios are expanded. For example, when the air outlet structure 20 is optimized, as shown in FIG. Fig.15 As shown, the air outlet structure 20 can be set on the main unit base to optimize the heat dissipation effect and the noise reduction effect during the motor heat dissipation process, so as to comprehensively improve the product performance.

[0086] 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 noise-reducing food processor, comprising a main machine and a processing assembly, wherein the main machine is provided with a motor for driving the processing assembly, and the main machine is also provided with an air outlet channel communicating with the outside, characterized in that: The food processor also includes an air outlet structure arranged in the air outlet channel, the air outlet structure includes at least two flow channels, each of the flow channels is provided with at least two interconnected valve units, each of the valve units includes a diverter column and a first surrounding wall and a second surrounding wall arranged on both sides of the diverter column, a first branch flow channel is formed between the first surrounding wall and the diverter column, a second branch flow channel is formed between the second surrounding wall and the diverter column, a diverter position is formed at the inlet of the valve unit, an obtuse angle is formed between a tangential path extending from the diverter position to the first branch flow channel and a tangential path extending from the diverter position to the second branch flow channel, the airflow flowing in from the diverter position includes a main airflow flowing along the first branch flow channel and an auxiliary airflow flowing along the second branch flow channel, and the main airflow and the auxiliary airflow intersect at an acute angle.

2. A noise-reducing food processor according to claim 1, characterized in that: The inner walls of the first surrounding wall and the second surrounding wall both include arc segments, and the arc corresponding to the arc segment of the first surrounding wall is smaller than the arc corresponding to the arc segment of the second surrounding wall.

3. A noise-reducing food processor according to claim 2, characterized in that: The first surrounding wall and the second surrounding wall are located on the circumference of an outer circle formed by the same radius.

4. A noise-reducing food processing machine according to claim 3, characterized in that: The cross section of the splitter column is circular.

5. A noise-reducing food processing machine according to claim 4, characterized in that: The outer circle formed by the first surrounding wall and the second surrounding wall is arranged concentrically with the inner circle formed by the diverter column.

6. A noise-reducing food processing machine according to claim 3, characterized in that: In the same flow channel, along the discharge direction of the airflow, the diameters of the outer circles formed by the plurality of valve units decrease in sequence.

7. A noise-reducing food processor according to claim 1, characterized in that: The first branch flow channels and the second branch flow channels of two adjacent valve units in the same flow channel are arranged alternately.

8. The noise-reducing food processing machine according to claim 1, characterized in that: The cross section of the diverter column is in a water drop shape, and / or the diverter column is hollow.

9. The noise-reducing food processing machine according to claim 1, characterized in that: An air outlet is arranged on the bottom side of the main unit, a gap is arranged between the valve unit near the air outlet and the air outlet, and outlets of the plurality of flow channels respectively form different angles with the bottom side of the main unit.

10. The noise-reducing food processor according to claim 1, characterized in that: The main unit is also provided with an air inlet channel, which includes at least two flow channels, each of which is provided with at least two interconnected valve units, and the external airflow quickly flows into the main unit through the valve units.

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