Low-noise soybean milk machine

Abstract

The utility model belongs to the technical field of household appliances, and discloses a low-noise soybean milk machine which comprises a cup body and a machine head with a built-in motor, the lower end of the machine head extends into the cup body, a rotating shaft of the motor extends out of the lower end of the machine head and is connected with a smashing cutter, and a smashing cover covering the periphery of the smashing cutter is installed at the lower end of the machine head. The crushing cutter is provided with a downward pressing part for pushing water downwards, the crushing cutter rotates to push water downwards to form a drainage area S1, the drainage area S1 is the maximum rotating area of the crushing cutter, and a plurality of overflowing notches with large lower parts and small upper parts are formed in the side wall of the crushing cover; each overflowing notch comprises a water supplementing opening located above the smashing cutter and a lower notch extending downwards from the water supplementing opening to the edge of the smashing cover, the sum of the areas of the multiple water supplementing openings forms a water supplementing area S2, and S1 / S2 is larger than or equal to 1.98 and smaller than or equal to 3.05. The bean dreg crushing machine realizes centralized crushing of materials, is beneficial to improving the crushing effect, and can reduce the working noise of the whole machine on the basis of improving the bean dreg condition so as to improve the crushing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and in particular relates to a low-noise soybean milk machine. Background Art

[0002] A soymilk machine generally includes a cup body and a machine head, and a crushing knife and a spoiler are arranged at the front end of the machine head to obtain a better taste of soymilk. The existing spoiler generally has a discharge hole on the side wall. However, since the small hole may cause material jam, the material is blocked from being discharged from the crushing cover through the small hole, resulting in poor crushing consistency and more bean skin and bean dregs after filtration.

[0003] There is a patent with application number CN201020578703.X that discloses a head structure of a soymilk machine. The head has an integrated grinder, and the grinder is cylindrical or trumpet-shaped with an open lower part. This solution omits the arrangement of the discharge hole, and forms a sufficiently large diversion opening at the bottom of the grinder to increase the effect of the material entering and exiting the grinder. The material circulates smoothly inside and outside the grinder, avoiding the situation where the material is stuck and causes poor grinding consistency.

[0004] The inventor has also conducted further research based on the above structure, and it has been verified that when a motor speed of less than 10,000 rmb is used to drive the crushing blade for pulping (the mainstream motor speed used by ordinary soymilk machines before 2013), compared with the netless soymilk machine with the same motor speed, the material crushing effect can be improved, and the bean dregs after filtration are relatively reduced, but there will still be coarse bean dregs, and after crushing, a small amount of bean skin will still be seen that has not been crushed, resulting in a rough taste of the soymilk. If only the motor speed is increased, there will be a serious splashing of soymilk, and the noise of slurry splashing will be brought about. In addition, due to the high motor speed, the material flow in the crushing cover is limited, and the idling noise that fluctuates between high and low is generated at the crushing blade, and the noise of the whole machine is significantly increased. Utility Model Content

[0005] The utility model provides a low-noise soybean milk machine, which not only solves the problem of poor grinding consistency caused by material jamming in the grinding cover in the prior art, but also further solves the technical problem of high noise caused by idling of the grinding knife in the prior art for solving the problem of coarse bean dregs.

[0006] The technical solution adopted by the utility model is:

[0007] The utility model provides a low-noise soymilk machine, comprising a cup body and a machine head with a built-in motor, the lower end of the machine head extends into the cup body, the rotating shaft of the motor extends from the lower end of the machine head and is connected with a crushing knife, the lower end of the machine head is equipped with a crushing cover arranged on the outer periphery of the crushing knife, the crushing knife has a downward pressure portion for pushing water downward, the crushing knife rotates to push water downward to form a drainage area S1, the drainage area S1 is the maximum rotation area of ​​the crushing knife, the side wall of the crushing cover is arranged with a plurality of flow gaps which are larger at the bottom and smaller at the top, a single flow gap comprises a water replenishment port located above the crushing knife and a lower gap extending downward from the water replenishment port to the edge of the crushing cover, the sum of the areas of the plurality of water replenishment ports forms a water replenishment area S2, and satisfies: 1.98≤S1 / S2≤3.05.

[0008] The low-noise soybean milk machine provided by the utility model realizes concentrated crushing of materials by installing a crushing cover arranged on the outer periphery of the crushing knife at the lower end of the machine head, which is conducive to improving the crushing effect. The side wall of the crushing cover is arranged with multiple flow gaps that are larger at the bottom and smaller at the top, so that the material can smoothly pass through the flow gaps and circulate inside and outside the crushing cover, effectively avoiding the material from being stuck in the flow gaps, which is conducive to improving the crushing consistency. By setting a downward pressure part that pushes water downward on the crushing knife, the crushing knife is rotated to drain water downward, so as to facilitate the material to enter and exit the crushing cover to form a cycle crushing. The single flow gap includes a water replenishment port located above the crushing knife and a lower gap extending downward from the water replenishment port to the edge of the crushing cover. The lower gap is used to form an open structure to avoid the problem of material stuck in the flow gap. At the same time, the material crushed in the crushing cover can be discharged under the downward pressure of the crushing knife through the water replenishment port, and the material outside the crushing cover can quickly flow in from the water replenishment port to achieve a good cycle, so as to prevent the idling noise caused by the idling of the crushing knife. According to experimental verification, the drainage area S1 and the water replenishment area S2 are set to 1.98≤S1 / S2≤3.05 to avoid the situation when the S1 / S2 ratio is less than 1.98, which causes the crushing area of ​​the crushing knife to be too small, resulting in coarse dregs and the appearance of bean skin. At the same time, avoid the situation when the S1 / S2 ratio is greater than 3.05, which causes the water replenishment area to be too small, and the material outside the crushing cover cannot be replenished into the crushing cover in time, causing the crushing knife to have high and low idling noise. Therefore, meeting 1.98≤S1 / S2≤3.05 can reduce the working noise of the whole machine on the basis of improving the dregs situation to enhance the crushing effect.

[0009] In a preferred embodiment, the crushing knife includes a blade with a blade surface facing downward, and the pressing portion is a blade surface disposed downward.

[0010] By setting the blade with the blade surface facing downward and using the downward blade surface to form a downward pressure part, a good drainage effect can be achieved, the discharge and replenishment of materials from the crushing cover can be accelerated, and circular crushing can be achieved. The crushing efficiency is improved, which is beneficial to reduce the amount of bean dregs and improve the delicate taste of soy milk.

[0011] In a preferred embodiment, the cutting edge extends from the tip of the blade to the root of the blade by an arc length L1, and the arc length L2 of the blade satisfies L1 / L2≥1 / 2.

[0012] By setting L1 / L2≥1 / 2, on the one hand, it is helpful to make full use of the arc length of the blade to set the blade surface, so as to improve the crushing effect of the crushing knife and improve the dregs situation. On the other hand, it further improves the auxiliary effect of the blade surface on the crushing knife pressing down the material, so as to achieve good circulation of the material, accelerate the crushing and make the crushing more delicate.

[0013] In a preferred embodiment, the side wall of the pulverizing cover is provided with a plurality of inwardly protruding spoiler protrusions, and the spoiler protrusions and the flow-through notches are alternately arranged along the side wall of the pulverizing cover.

[0014] By providing the inwardly raised spoiler protrusions, the materials entering the crushing cover can fully collide with the crushing knife to be fully crushed, thereby improving the condition of the bean dregs and making the taste of the soy milk more delicate.

[0015] In a preferred embodiment, the top of the spoiler protrusion is lower than the top of the flow-through notch.

[0016] Avoid the spoiler protrusions occupying too much space, so as to provide sufficient water replenishment space near the water replenishment port, so that during the material circulation process, after the material in the crushing cover is discharged downward, the water flow or material outside the crushing cover can quickly enter from the water replenishment port, avoiding cavitation noise from the crushing knife and improving the crushing circulation effect.

[0017] In a preferred embodiment, the vertical distance between the root of the pulverizing knife and the top wall of the pulverizing cover is H1, and the vertical distance between the bottom end of the pulverizing cover and the top wall of the pulverizing cover is H2, satisfying: 1 / 2≤H1 / H2≤5 / 8.

[0018] By setting H1 / H2 within a reasonable range, that is, the height of the crushing knife and the overall height of the crushing cover are set within a reasonable range, it can effectively avoid the situation where H1 / H2 is too small, because H1 is too small, too little material is added to the crushing cover from the water supply port, resulting in insufficient crushing effect; at the same time, avoid H1 / H2 being too large, that is, when H1 is too large, the space above the crushing knife is too large, and the material added to the crushing cover from the water supply port cannot fill the crushing cover, causing the blade to hit empty and bring cavitation noise. Therefore, satisfying 1 / 2≤H1 / H2≤5 / 8 can achieve simultaneous improvement of crushing noise and crushing fineness.

[0019] In a preferred embodiment, the side wall of the crushing cover has a plurality of baffles arranged at intervals along the circumferential direction, and the flow gap is formed between two adjacent baffles. The lower end contour of the crushing cover forms a continuous wave shape, the lower end of the contour of the baffle forms a trough, and the upper end of the contour of the water replenishment port forms a peak.

[0020] By configuring the crushing hood to include multiple baffles and forming a continuous wave shape at the lower end of the crushing hood, it is beneficial for the material to flow smoothly inside and outside the crushing hood, thereby improving the crushing effect and avoiding the formation of a cleaning dead corner at the lower end of the crushing hood, thereby facilitating cleaning by users.

[0021] In a preferred embodiment, the plurality of water supply ports include a first water supply port whose height from the wave crest to the top wall of the crushing cover is h1 and a second water supply port whose height from the wave crest to the top wall of the crushing cover is h2, and the first water supply port and the second water supply port are alternately arranged along the circumference of the crushing cover, and h1<h2.

[0022] By setting the first water replenishment port and the second water replenishment port at different heights from the crushing cover, a pressure difference occurs in the liquid flow flowing out of the different water replenishment ports, and a turbulent effect occurs when the liquid flow rotates between the outer side of the crushing cover and the side wall of the cup body, which promotes the mixing of liquid flows at different heights, thereby effectively mixing the liquid outside the crushing cover, which is conducive to ensuring the consistency of the crushing rate, improving the circulation effect, and improving the crushing effect. The alternating arrangement of the first water replenishment port and the second water replenishment port is also conducive to the dynamic balance when the crushing blade beats the liquid flow, so that the machine head does not shake or vibrate significantly during the beating process of the crushing blade, and the working noise is reduced.

[0023] In a preferred embodiment, a horizontal distance L0 between the tip of the pulverizing knife and the side wall of the pulverizing cover satisfies 16 mm ≤ L0 ≤ 25 mm; or an outer diameter D1 of the pulverizing knife satisfies 55 mm ≤ D1 ≤ 65 mm.

[0024] The smaller the horizontal distance between the tip of the pulverizing knife and the side wall of the pulverizing cover, that is, the larger the outer diameter of the pulverizing knife, the better the pulverizing effect can be. However, at the same time, the water supply port on the side wall of the pulverizing cover cannot meet the needs of rapid material replenishment, causing cavitation noise in the pulverizing cover. Therefore, through experimental verification, meeting 16mm≤L0≤25mm, or 55mm≤D1≤65mm can avoid the problems of too much bean dregs caused by too small a pulverizing knife and too much noise caused by too large a pulverizing knife, thereby achieving simultaneous improvement of pulverizing efficiency and noise reduction effect.

[0025] In a preferred embodiment, the drainage area S1 and the water replenishment area S2 satisfy: 2≤S1 / S2≤2.5.

[0026] Through multiple tests and verifications, the drainage area S1 and the water replenishment area S2 satisfy: 2≤S1 / S2≤2.5. The soymilk machine can achieve stable and silent pulping, no motor idling, relatively small motor power, less bean dregs, no bean skin, and a very good crushing effect.

[0027] In a preferred embodiment, the machine head includes a machine head upper cover and a metal lower cover, the machine head upper cover and the metal lower cover are fixedly connected to enclose and form an installation cavity for accommodating the motor, and the crushing cover is integrally formed with the metal lower cover.

[0028] By forming the crushing cover and the metal lower cover in one piece, a matching gap between the crushing cover and the metal lower cover is avoided, the risk of slag accumulation is reduced, and cleaning is convenient for users.

[0029] In a preferred embodiment, the machine head includes a machine head upper cover and a metal lower cover, the machine head upper cover and the metal lower cover are fixedly connected to enclose and form an installation cavity for accommodating the motor, and the crushing cover is fixedly connected to the metal lower cover by fasteners.

[0030] By fixing the crushing cover and the metal lower cover with fasteners, the metal lower cover and the crushing cover can be processed independently, which simplifies the production process and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 on the present invention. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a soybean milk machine in one embodiment of the utility model;

[0033] Figure 2 This is a schematic structural diagram of the machine head in one embodiment of the utility model;

[0034] Figure 3 A bottom view of the machine head in one embodiment of the utility model;

[0035] Figure 4 It is a schematic structural diagram of a crushing cover in one embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 10. cup body; 20. machine head; 30. motor; 31. rotating shaft; 40. crushing knife; 41. blade surface; 50. crushing cover; 51. flow gap; 52. water filling port; 53. lower gap; 54. spoiler protrusion. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present invention and the features in each embodiment may be combined with each other without conflict.

[0040] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" 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 utility model. 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.

[0043] like Figure 1-3As shown, the utility model provides a low-noise soybean milk machine, including a cup body 10 and a head 20 with a built-in motor 30, the lower end of the head 20 extends into the cup body 10, the rotating shaft 31 of the motor 30 extends from the lower end of the head 20 and is connected to a crushing knife 40, and a crushing cover 50 is installed at the lower end of the head 20 and is covered on the outer periphery of the crushing knife 40, and the crushing knife 40 has a downward pressing part for pushing water downward, such as Figure 3 As shown, specifically, the crushing blade includes a blade with a downward blade surface, and the downward pressing portion is a blade surface 41 arranged downward. The crushing blade 40 rotates and pushes water downward to form a drainage area S1, and the drainage area S1 is the maximum rotation area of ​​the crushing blade. Figure 2 As shown, the side wall of the crushing cover is arranged with a plurality of flow gaps 51 that are larger at the bottom and smaller at the top, that is, the opening size of the flow gap gradually increases from top to bottom, and a single flow gap 51 includes a portion located above the crushing knife 40 (such as Figure 2 The water replenishment port 52 (above the auxiliary line X shown in the figure) and the lower notch 53 (located below the auxiliary line X) extending downward from the water replenishment port 52 to the edge of the crushing cover 50, the sum of the areas of the multiple water replenishment ports 52 forms a water replenishment area S2, which satisfies: 1.98≤S1 / S2≤3.05.

[0044] It should be noted that the rotation area of ​​the crushing knife 40 is the maximum rotation area of ​​the crushing knife 40, that is, when the crushing knife 40 includes multiple blades with different outer diameters, the rotation area formed by the rotation of the blade with the largest outer diameter in the crushing knife 40 is the drainage area S1. Figure 2 As shown, the maximum blade diameter is D1, S1 = πD1 2 .

[0045] It should also be noted that the sum of the areas of the multiple water replenishment ports 52 refers to the sum of the projection areas of the multiple water replenishment ports 52 on the vertical plane. When the side wall of the crushing cover 50 extends downward in an arc shape, the sum of the projection areas of each water replenishment port 52 on the vertical plane is the water replenishment area S2. Moreover, when the crushing blade includes a bent blade, the water replenishment port is located above the highest point of the crushing blade, and the water replenishment area S2 refers to the total area of ​​the water replenishment ports located above the highest point of the crushing blade.

[0046] After discovering that the water replenishment area on the crushing cover 50 and the drainage area of ​​the crushing knife 40 will affect the crushing effect and the crushing noise, the applicant set up multiple groups of tests to verify how to reasonably set the drainage area S1 and the water replenishment area S2 to achieve the simultaneous improvement of the crushing effect and the crushing noise. Specifically, in each group of test examples, the motor speed is 11000R / min, the inner diameter of the lower end opening of the crushing cover is 91mm, different S1 and S2 are set for different test examples, and the noise during the test, the bean dregs particle size and bean dregs condition after the test are analyzed. The test results are shown in Table 1 below:

[0047] Table 1 shows the noise and dregs under different S1 / S2 ratios

[0048]

[0049]

[0050] According to the analysis in Table 1, when 1.98≤S1 / S2≤3.05 is satisfied, that is, in Test Example 4-19, the noise is not greater than 70dB, and the average particle size of the dregs is less than 120μm, and no bean skin is found in the dregs. When S1 / S2 is greater than 3.05, the noise increases significantly, greater than 70dB, and bean lumps appear, and the dregs are coarse. When S1 / S2 is less than 1.98, the average particle size of the dregs is more than 126μm, and more bean skin appears in the dregs, and the dregs are more and coarser.

[0051] More preferably, as shown in Table 1, the drainage area S1 and the water replenishment area S2 satisfy: 2≤S1 / S2≤2.5.

[0052] The noise can be lower than 68dB, achieving a low sound effect, and the average particle size of the dregs is below 116μm. Therefore, the soymilk machine can be stable and silent, without the idling phenomenon of the motor 30, the power of the motor 30 is relatively small, there is less dregs, no bean skin, and the crushing effect is very good.

[0053] In summary, the low-noise soymilk machine provided in this embodiment achieves centralized crushing of materials by installing a crushing cover 50 on the outer periphery of the crushing knife 40 at the lower end of the machine head 20, which is beneficial to improving the crushing effect. The side wall of the crushing cover is arranged with a plurality of flow gaps that are larger at the bottom and smaller at the top. The material can smoothly circulate inside and outside the crushing cover through the flow gaps, effectively avoiding the material from being stuck in the flow gaps, which is beneficial to improving the crushing consistency. A downward pressure portion is provided on the crushing knife 40 to rotate and drain water downward, and a drainage area S1 is formed by utilizing the maximum rotation area of ​​the crushing knife 40 to facilitate the material to enter and exit the crushing cover 50 to form a circulation crushing. A plurality of flow gaps 51 are arranged on the side wall of the crushing cover 50. A single flow gap 51 includes a water replenishment port 52 located above the crushing knife 40 and a lower gap 53 extending downward from the water replenishment port 52 to the edge of the crushing cover 50. This can avoid the problem of material jamming in the flow gap 51, thereby improving the crushing consistency. At the same time, the water replenishment port 52 can be used to allow the crushed material in the crushing cover 50 to be discharged under the downward pressure of the crushing knife 40, and the material outside the crushing cover 50 can quickly flow in from the water replenishment port 52 to achieve a good circulation and prevent the idling noise caused by the idling of the crushing knife 40. According to experimental verification, the drainage area S1 and the water replenishment area S2 are set to 1.98≤S1 / S2≤3.05 to avoid the situation when the S1 / S2 ratio is less than 1.98, which causes the crushing area of ​​the crushing knife 40 to be too small, resulting in coarse dregs and the appearance of bean skin. At the same time, it is avoided that when the S1 / S2 ratio is greater than 3.05, the water replenishment area is too small, and the materials outside the crushing cover 50 cannot be replenished into the crushing cover 50 in time, causing the crushing knife 40 to have high and low idling noise. Therefore, satisfying 1.98≤S1 / S2≤3.05 can reduce the working noise of the whole machine on the basis of improving the dregs situation to enhance the crushing effect.

[0054] In a preferred embodiment, Figure 3 As shown, the blade has a cutting edge extending in an arc line, and the cutting edge 41 extends from the tip of the blade to the root of the blade by an arc length L1, and the arc length L2 of the blade satisfies L1 / L2≥1 / 2.

[0055] By setting the blade with the blade surface facing downward, the blade surface is used to form a downward pressure portion to assist the blade in pressing down to drain water, which is beneficial to accelerate the discharge of water flow, accelerate the circulation and crushing of materials inside and outside the crushing cover 50, improve the crushing efficiency, and help reduce the amount of bean dregs and improve the delicate taste of soy milk. By setting L1 / L2≥1 / 2, on the one hand, it is beneficial to fully utilize the arc length of the blade to set the blade surface to improve the crushing effect of the crushing knife 40 and improve the bean dregs situation. On the other hand, it further enhances the auxiliary effect of the blade surface on the crushing knife 40 to press down the material, so as to achieve good circulation of the material, accelerate the crushing and make the crushing more delicate. Of course, in addition to using the above-mentioned downward blade surface as the downward pressure portion, in fact, the downward pressure portion can also be the blade itself, and downward pressure and drainage can be achieved by setting the blade at an angle.

[0056] Of course, in practice, the cutting edge may extend in a straight line, in which case the extension length L3 of the cutting edge and the extension length L4 from the tip of the blade to the root of the blade preferably satisfy L3 / L4≥1 / 2.

[0057] More preferably, an upward blade surface can also be set on the same blade. Optionally, the blade includes a first section and a second section connected to each other, a downward blade surface is set on the lower side of the first section, and an upward blade surface is set on the upper side of the second section to achieve a three-dimensional crushing effect.

[0058] It can be understood that the blade of the pulverizing knife can be a double-sided blade, that is, the blade surface facing downward is arranged at the position opposite to the blade surface facing upward, so that the cutting edge is sharper.

[0059] In addition, the utility model does not limit the blade structure of the crushing knife. For example, the crushing knife may optionally include a horizontally extending flat blade, a downwardly bent lower blade, or an upwardly bent upper blade.

[0060] In a preferred embodiment, Figure 2 As shown, the vertical distance between the root of the crushing knife 40 and the top wall of the crushing cover 50 is H1, and the vertical distance between the bottom end of the crushing cover 50 and the top wall of the crushing cover 50 is H2, satisfying: 1 / 2≤H1 / H2≤5 / 8.

[0061] By setting H1 / H2 within a reasonable range, that is, the height of the crushing blade 40 and the overall height of the crushing cover 50 are set within a reasonable range, it can be effectively avoided that when H1 / H2 is too small, too little material is added to the crushing cover 50 from the water replenishment port 52 due to H1 being too small, resulting in insufficient crushing effect; at the same time, avoid H1 / H2 being too large, that is, when H1 is too large, the space above the crushing blade 40 is too large, and the material added to the crushing cover 50 from the water replenishment port 52 cannot fill the crushing cover 50, causing the blade to hit empty and bring cavitation noise. Therefore, 1 / 2≤H1 / H2≤5 / 8 is satisfied, and the crushing noise and crushing fineness are improved simultaneously.

[0062] In a preferred embodiment, Figure 2 As shown, the horizontal distance L0 between the tip of the crushing knife 40 and the side wall of the crushing cover 50 satisfies 16 mm≤L0≤25 mm; or, the outer diameter D1 of the crushing knife 40 satisfies 55 mm≤D1≤65 mm.

[0063] The smaller the horizontal distance between the tip of the pulverizing blade 40 and the side wall of the pulverizing cover 50 is, that is, the larger the outer diameter of the pulverizing blade 40 is, the higher the pulverizing effect can be. However, at the same time, the water supply port 52 on the side wall of the pulverizing cover 50 cannot meet the needs of rapid material replenishment, resulting in cavitation noise in the pulverizing cover 50. Therefore, after experimental verification, satisfying 16mm≤L0≤25mm, or 55mm≤D1≤65mm can avoid the problems of too much bean dregs caused by too small a pulverizing blade 40 and too much noise caused by too large a pulverizing blade, thereby achieving simultaneous improvement of pulverizing efficiency and noise reduction effect.

[0064] The utility model does not limit the specific structure of the crushing cover. For example, Figure 4 As shown, in a preferred embodiment, the side wall of the crushing cover 50 is provided with a plurality of inwardly protruding spoiler protrusions 54, and the spoiler protrusions 54 and the flow-through notches 51 are alternately arranged along the side wall of the crushing cover. More preferably, the top of the spoiler protrusion 54 is lower than the top of the flow-through notch 51.

[0065] Preferably, the side wall of the crushing cover 50 is concave from the outside to the inside to form an outer concave and inner convex structure, and the spoiler protrusion 54 is located on the inner side of the outer concave and inner convex structure.

[0066] By setting the spoiler protrusion that bulges inward, the material entering the crushing cover can fully collide with the crushing knife to achieve full crushing, thereby improving the dregs and making the soy milk taste more delicate. The top of the spoiler protrusion is lower than the top of the flow gap to prevent the spoiler protrusion from occupying too much space, thereby providing sufficient water replenishment space near the water replenishment port, so that during the material circulation process, after the material in the crushing cover is discharged downward, the water flow or material outside the crushing cover can quickly enter from the water replenishment port, avoiding cavitation noise from the crushing knife and improving the crushing circulation effect.

[0067] In another preferred embodiment, the side wall of the crushing cover 50 has a plurality of baffles arranged at intervals along the circumferential direction, and a flow gap 51 is formed between two adjacent baffles. The contour of the lower end of the crushing cover 50 forms a continuous wave shape, the lower end of the contour of the baffle forms a trough, and the upper end of the contour of the water replenishment port 52 forms a peak. More preferably, the plurality of water replenishment ports 52 include a first water replenishment port with a height of h1 from the peak to the top wall of the crushing cover 50 and a second water replenishment port with a height of h2 from the peak to the top wall of the crushing cover 50, and the first water replenishment port and the second water replenishment port are alternately arranged along the circumference of the crushing cover 50, and h1<h2.

[0068] By setting the crushing cover 50 to include multiple baffles and forming a continuous wave shape at the lower end profile of the crushing cover 50, it is beneficial for the smooth flow of materials inside and outside the crushing cover 50, improving the crushing effect, and avoiding the formation of a cleaning dead corner at the lower end of the crushing cover 50, which is convenient for users to clean. By setting the first water replenishment port and the second water replenishment port at different heights from the crushing cover 50, a pressure difference occurs in the liquid flow flowing out of different water replenishment ports 52, and a turbulent effect occurs when the liquid flow between the outer side of the crushing cover 50 and the side wall of the cup body 10 rotates and flows, which promotes the mixing of liquid flows at different heights, and then effectively mixes the liquid outside the crushing cover 50, which is beneficial to ensure the consistency of the crushing rate, improve the circulation effect, and improve the crushing effect. The alternating arrangement of the first water replenishment port and the second water replenishment port is also beneficial to the dynamic balance when the crushing knife 40 beats the liquid flow, so that the machine head 20 does not shake or vibrate significantly during the beating of the crushing knife 40, and the working noise is reduced.

[0069] The present invention does not limit the fixing method of the crushing cover 50 and the machine head 20. For example, the machine head 20 includes a machine head upper cover and a metal lower cover, which are fixedly connected to enclose a mounting cavity for accommodating the motor 30. The crushing cover 50 and the metal lower cover are fixedly connected by fasteners. Specifically, the fasteners are screws, and studs are protruding above the top wall of the crushing cover 50. The screws pass through the metal lower cover and are locked to the studs to achieve fixation.

[0070] By fixing the crushing cover 50 and the metal lower cover with fasteners, the metal lower cover and the crushing cover 50 can be processed independently, which simplifies the production process and reduces the production cost.

[0071] In another preferred embodiment, the machine head 20 includes a machine head upper cover and a metal lower cover, the machine head upper cover and the metal lower cover are fixedly connected to enclose and form a mounting cavity for accommodating the motor 30, and the crushing cover 50 is integrally formed with the metal lower cover. By integrally forming the crushing cover 50 with the metal lower cover, a matching gap between the crushing cover 50 and the metal lower cover is avoided, the risk of slag accumulation is reduced, and it is convenient for users to clean.

[0072] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0073] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0074] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A low-noise soybean milk machine, comprising a cup body and a head with a built-in motor, wherein the lower end of the head extends into the cup body, and the rotating shaft of the motor extends from the lower end of the head and is connected to a crushing knife, characterized in that: A crushing cover is installed at the lower end of the head, and the crushing knife has a downward pressure part that pushes water downward. The crushing knife rotates to push water downward to form a drainage area S1. The drainage area S1 is the maximum rotation area of ​​the crushing knife. The side wall of the crushing cover is arranged with a plurality of flow gaps that are larger at the bottom and smaller at the top. A single flow gap includes a water replenishment port located above the crushing knife and a lower gap extending downward from the water replenishment port to the edge of the crushing cover. The sum of the areas of the plurality of water replenishment ports forms a water replenishment area S2, which satisfies: 1.98≤S1 / S2≤3.

05.

2. A low-noise soybean milk machine according to claim 1, characterized in that: The crushing knife comprises a blade with a blade surface facing downward, and the pressing portion is a blade surface arranged downward.

3. A low-noise soybean milk machine according to claim 2, characterized in that: The arc length of the blade surface extending from the tip to the root of the blade is L1, and the arc length of the blade is L2, satisfying L1 / L2≥1 / 2.

4. A low-noise soybean milk machine according to claim 1, characterized in that: The vertical distance between the root of the pulverizing knife and the top wall of the pulverizing cover is H1, and the vertical distance between the bottom end of the pulverizing cover and the top wall of the pulverizing cover is H2, which satisfies: 1 / 2≤H1 / H2≤5 / 8.

5. The low-noise soybean milk machine according to claim 1, characterized in that: The side wall of the pulverizing cover is provided with a plurality of spoiler protrusions protruding inwardly, and the spoiler protrusions and the flow-through notches are alternately arranged along the side wall of the pulverizing cover.

6. A low-noise soybean milk machine according to claim 5, characterized in that: The top of the spoiler protrusion is lower than the top of the flow-through notch.

7. A low-noise soybean milk machine according to claim 1, characterized in that: The horizontal distance L0 between the tip of the crushing knife and the side wall of the crushing cover satisfies 16mm≤L0≤25mm; Alternatively, the outer diameter D1 of the crushing knife satisfies 55 mm≤D1≤65 mm.

8. The low-noise soybean milk maker according to claim 1, characterized in that: The drainage area S1 and the water replenishment area S2 satisfy: 2≤S1 / S2≤2.

5.

9. The low-noise soybean milk maker according to claim 1, characterized in that: The machine head comprises a machine head upper cover and a metal lower cover, the machine head upper cover and the metal lower cover are fixedly connected to enclose and form a mounting cavity for accommodating the motor, and the crushing cover is integrally formed with the metal lower cover.

10. The low-noise soybean milk machine according to claim 1, characterized in that: The machine head comprises a machine head upper cover and a metal lower cover, the machine head upper cover and the metal lower cover are fixedly connected to enclose and form an installation cavity for accommodating the motor, and the crushing cover is fixedly connected to the metal lower cover via fasteners.

Images