Soybean milk machine

Abstract

The invention belongs to the technical field of kitchen appliances, and discloses a soybean milk machine which comprises a cup body and a machine head installed on the cup body, the machine head comprises a machine head lower cover and a smashing cover, the top wall face of the smashing cover extends horizontally, a motor is arranged in the machine head lower cover, and a rotating shaft driven by the motor penetrates through the top wall face of the smashing cover and extends into the smashing cover. The side wall face of the smashing cover is provided with a plurality of flow baffles which are arranged at intervals in the circumferential direction, overflowing notches are formed, the outline of the lower end of the smashing cover is in a continuous wave shape, wave troughs are formed in the lower ends of the flow baffles, and wave crests are formed in the upper ends of the outlines of the overflowing notches. The height from the wave crest to the top wall face of the smashing cover is H1, the height from the wave crest to the top wall face of the smashing cover is H2, the first overflowing notches and the second overflowing notches are alternately arranged in the circumferential direction of the smashing cover, H1 is smaller than H2, H1 is larger than or equal to 0 and smaller than or equal to 6 mm, H2 is larger than or equal to 10 mm and smaller than or equal to 15 mm, and filter-free drinking of pure soybean milk is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and in particular relates to a soymilk maker. Background Art

[0002] Early household soymilk machines include a machine head and a cup body. A crushing blade is provided on the machine head. The crushing blade is used to crush soybeans to make soymilk. Since there are many small bean pieces that are not completely crushed in the bean dregs, in order to meet the requirements of drinking taste, early soymilk needs to be filtered before drinking. With the advancement of technology, in order to obtain a better taste of soymilk, and even to meet the needs of consumers to drink directly without filtering, R&D personnel will set a crushing cover on the machine head. For example, a soymilk machine disclosed in patent number CN201510279186.3 has a spoiler with multiple circumferential baffles, and two adjacent baffles are connected to form a corner protruding to the outside of the spoiler. A discharge hole is provided on the side wall of the spoiler. However, since the small holes are provided, there will be a situation where the material is stuck, causing the material to be blocked from the small holes to discharge from the crushing cover, resulting in poor crushing consistency and more bean dregs after filtration.

[0003] There is also a patent numbered CN201020578703.X in the prior art that discloses a head structure of a soybean milk machine, wherein the head is integrally formed with a grinder, and the grinder is in a cylindrical or trumpet shape with an open lower portion. This solution omits the arrangement of the discharge hole, and forms a sufficiently large diversion opening at the bottom of the grinder, thereby increasing the effect of the material entering and exiting the grinder, and the material circulates smoothly inside and outside the grinder, thereby avoiding the situation where the material is stuck and causes poor consistency in the crushing. The inventor has also conducted further research based on the above structure, and it has been verified that when the motor speed below 10,000 rmb is used to drive the crushing blade to beat the pulp (before 2013, the mainstream motor speed used by ordinary soybean milk machines), compared with a netless soybean milk machine with the same motor speed, the crushing effect of the material can be improved, and the slag rate of soybeans after crushing is about 50%, and the slag after filtering is relatively reduced. However, the crushing efficiency of the soybean milk machine obviously cannot meet the drinking requirements of modern consumers for the taste of soybean milk. The residue discharge rate cannot reach the level of pure soybean milk prepared by a soybean milk machine without filtering for drinking (the residue discharge rate is required to be no higher than 25%).

[0004] In the process of further research, the inventor adopted a motor speed of more than 12000rmb to drive the crushing blade to beat the soybeans under the above-mentioned soymilk machine structure (the mainstream speed of the motor used in ordinary soymilk machines after 2013). It was verified through experiments that even if the motor speed is increased, the slag rate after soybean crushing is reduced to about 40%, and the slag rate still cannot reach the level of soymilk machine for preparing pure soymilk for drinking without filtering (the standard for soymilk machines for household and similar purposes: the slag rate required for first-level crushing is not higher than 4%, the slag rate required for second-level crushing is not higher than 8%, and the slag rate required for third-level crushing is not higher than 25%).

[0005] Moreover, the high-speed beating process will cause serious soy milk splashing, especially when the surface of the machine head is cleaned with beating water, high-temperature water droplets are easily sprayed out from the gap between the machine head and the cup body, posing a safety risk of scalding people. In addition, the noise of slurry splashing and the limited material flow in the crushing cover due to the high motor speed will cause high and low idling noise at the crushing knife, which will significantly increase the noise of the whole machine.

[0006] Based on this, the inventor wants to further obtain soy milk with better taste and avoid loud noise of the whole machine, so the inventor thinks of further improving the grinder. Summary of the invention

[0007] The present invention provides a soybean milk machine, which solves the problem that the slag discharge rate in the existing pulping technology is high and pure soybean milk cannot be drunk without filtering, by optimizing the size of the flow gap on the crushing cover and avoiding the increase of the noise of the whole machine.

[0008] The technical solution adopted by the present invention is:

[0009] The present invention provides a soymilk machine, comprising a cup body and a machine head installed on the cup body, the machine head comprising a machine head lower cover, a crushing cover is arranged at the front end of the machine head lower cover, the top wall of the crushing cover extends horizontally, a motor is arranged in the machine head lower cover, a rotating shaft driven by the motor penetrates the top wall of the crushing cover and extends into the crushing cover, and a crushing blade is installed at the end of the rotating shaft, the side wall of the crushing cover has a plurality of baffles arranged at intervals along the circumferential direction, and a 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 flow gap forms a crest, the flow gap comprises a first flow gap whose height from the crest to the top wall of the crushing cover is H1 and a second flow gap whose height from the crest to the top wall of the crushing cover is H2, the first flow gap and the second flow gap are alternately arranged along the circumferential direction of the crushing cover, H1<H2, and, 0≤H1≤6mm, 10mm≤H2≤15mm.

[0010] In the present invention, the top wall of the crushing cover extends horizontally, and the side wall of the crushing cover has a plurality of baffles arranged at intervals along the circumferential direction, and a flow gap is formed between two adjacent baffles, and the height H1 from the wave crest of the first flow gap to the top wall of the crushing cover is less than the height from the wave crest of the second flow gap to the top wall of the crushing cover, and the first flow gap and the second flow gap are arranged alternately, so as to form a wavy profile at the bottom of the crushing cover, and the height of the wave crest of the wavy profile is different, so that the liquid flow flowing out of different flow gaps has a pressure difference, and the liquid flow between the outer side of the crushing cover and the side wall of the cup body rotates and flows, which promotes the mixing of liquid flows at different heights, and then effectively mixes the liquid outside the crushing cover, which is beneficial to ensure the consistency of the crushing rate, improve the circulation effect, and thus improve the crushing effect. The alternating arrangement of the first flow gap and the second flow gap is also beneficial to the dynamic balance of the crushing blade when whipping the liquid flow, so that the machine head will not be obviously shaken or vibrated during the beating of the crushing blade. Since H1<H2, the opening height of the second flow gap is smaller, and the opening height of the first flow gap is larger, satisfying 10mm≤H2≤15mm, preventing H2 from being too large, resulting in insufficient gap height (small gap), obstructing the outflow of materials, affecting circulation, and preventing H2 from being too small, which is not conducive to the crushing cover to gather and reflect the materials, and is conducive to avoiding liquid splashing; 0≤H1≤6mm, to ensure that the material is quickly replenished to the crushing cover, prevent cavitation noise caused in the crushing cover, and reduce working noise. Moreover, the setting of the first flow gap and the second flow gap can prevent the formation of cleaning dead corners on the inner side of the crushing cover, which is easy to clean. And the top wall of the crushing cover extends horizontally, which can be fitted or directly packaged as the front end wall of the lower cover of the machine head, and the structure is reliable. In summary, the dimensions of the first flow gap and the second flow gap are set to meet 10mm≤H2≤15mm and 0≤H1≤6mm, so as to achieve effective noise control and improve the crushing effect. The inventors have verified through experiments that the above parameter settings can ultimately achieve a slag discharge rate of no more than 8%, that is, to meet the secondary crushing requirement for pure soy milk production (the first-level crushing requirement slag discharge rate is no more than 4%, the second-level crushing requirement slag discharge rate is no more than 8%, and the third-level crushing requirement slag discharge rate is no more than 25%).

[0011] In a preferred embodiment, a height difference H3 is formed between the wave crest of the first flow-through gap and the wave crest of the second flow-through gap, wherein 4 mm≤H3≤14 mm.

[0012] When the blade rotates at high speed, it will drive the water flow to rotate, and there will be air bubbles in the water. The flow rate near the blade is fast and the pressure is low, so the bubbles will precipitate from the liquid, forming many air bubbles above the blade. Too many air bubbles will cause cavitation noise in the crushing hood, and the noise will be loud during the crushing process. Therefore, it is necessary to increase the flow gap to release the air bubbles to reduce the cavitation noise at the blade position. However, the increase in the flow gap will cause the crushing hood to have a worse effect on material aggregation, which is not conducive to the reflection of the material in the crushing hood, and the probability of collision between the material and the blade will decrease. At the same time, after the material flows out of the crushing hood, the liquid flow cannot be quickly replenished to the crushing hood, and the crushing efficiency will decrease. Therefore, the inventor has verified through many tests that by further optimizing the size of the first flow gap and the second flow gap, since H1<H2, the height difference H3 formed by the two wave peaks is set to 4mm≤H3≤14mm, the opening height of the first flow gap is greater than the opening height of the second flow gap, the first flow gap is used to release air bubbles to reduce the cavitation noise at the position of the crushing blade, and the second flow gap is used to reduce the opening to concentrate the material in the crushing cover, so as to solve the contradiction between the crushing effect and the noise effect caused by the flow gap being too large or too small. After the test, it is found that when the above parameter settings are adopted, the final slag discharge rate is not higher than 8%, which can meet the secondary crushing requirements of pure soy milk production. At the same time, the working noise is not higher than 70dB, which meets the first-level requirements. (The first-level requirements for the processing noise level of the soymilk machine are not higher than 70dB, the second-level requirements are not higher than 75dB, and the third-level requirements are not higher than 80dB). Therefore, while improving the crushing effect, the working noise is reduced and the user experience is improved.

[0013] In a preferred embodiment, the heights from the troughs formed by the plurality of baffles to the top wall of the pulverizing cover are equal.

[0014] By making the heights from the troughs formed by the multiple baffles to the top wall of the crushing cover equal, that is, setting the bottom ends of the multiple baffles to the same height, the material in the feed space formed between the bottom of the cup body and the crushing cover can flow evenly into the crushing cover, thereby improving the crushing consistency, and then improving the crushing effect and crushing efficiency. In addition, after the machine head is removed from the cup body, the machine head can be placed independently and stably on the workbench.

[0015] In a preferred embodiment, the area of ​​a single baffle plate is larger than the area of ​​a single second flow gap.

[0016] By setting the area of ​​the baffle plate to be larger than the area of ​​the second flow gap, the material can smoothly enter and exit the crushing cover on the basis of ensuring the effective flow gathering and crushing effect of the crushing cover, thereby improving the material circulation crushing and the crushing effect.

[0017] In a preferred embodiment, the average height from the root plane of the crushing blade to the top wall of the crushing cover is H4, wherein H4≥H2, wherein 15mm≤H4≤17mm.

[0018] By setting H4≥H2 and the crushing blade being lower than the peak of the second flow notch, the distance between the crushing blade and the top wall of the crushing cover is ensured, thus avoiding material jamming and motor stalling, which is beneficial to improving the temperature rise of the motor. Moreover, the average height from the crushing blade to the top wall of the crushing cover is set within a reasonable range, for example, 15mm≤H4≤17mm, so that the material can rebound to the blade position of the crushing blade after passing through the side wall of the crushing cover, thereby achieving effective crushing and improving the crushing effect.

[0019] In a preferred embodiment, the flow opening area enclosed by the lower ends of the plurality of baffles is S1, the sum of the areas of the plurality of flow gaps is S2, and S2 / S1=0.35-0.55.

[0020] In a preferred embodiment, the flow opening is a feed port, and the flow gap is a discharge port, wherein S2 / S1=0.41-0.51.

[0021] By setting the area and ratio of the overflow opening and the overflow gap, the material inlet and outlet ratio of the crushing hood is reasonable, the crushing consistency is improved, and the crushing is more thorough. S2 / S1=0.41-0.51, so that the size of the first overflow gap and the second overflow gap is reasonably matched, so as to avoid the ratio of the material in and out of the crushing hood being too large or too small, resulting in poor centralized crushing of the crushing hood and empty beating noise. After experimental verification, the first overflow gap and the second overflow gap are arranged alternately. If S2 / S1 exceeds 0.51, the cavitation noise caused by the inability of the liquid flow to quickly return to the crushing hood will occur, and the crushing blade will have empty beating noise. In addition, the ability of the crushing hood to concentrate the crushing of the material becomes worse, and the material is not easy to be concentrated in the crushing hood for crushing, resulting in the crushing rate not reaching the level of the second level of free filtering. When S2 / S1 is less than 0.41, although the crushing hood can accommodate more materials in the crushing hood without jumping out, the materials cannot be effectively crushed, and the slag discharge is large, which still makes the crushing rate not reach the level of the second level of free filtering.

[0022] In a preferred embodiment, 4, 6 or 8 baffles are provided.

[0023] The above-mentioned number setting of the baffle plates realizes a balanced distribution of the first flow gap and the second flow gap, which is beneficial to the balance of the liquid flow and the consistency of the material circulation and crushing.

[0024] In a preferred embodiment, the side wall surface of the crushing cover is an outwardly convex spherical arc surface.

[0025] By making the side wall of the crushing cover into an outwardly convex spherical arc surface, when the materials concentrated in the crushing cover are centrifugally beaten by the crushing blades, the probability of the materials rebounding onto the blades of the crushing blades can be increased, thereby improving the crushing effect and achieving the filter-free level.

[0026] In a preferred embodiment, 4mm≤H1≤5mm, 12mm≤H2≤15mm.

[0027] After further experimental research, the inventor of the present invention has achieved a residue discharge rate of less than 6% by adjusting the diameter of 4mm≤H1≤5mm and the diameter of 12mm≤H2≤15mm, thereby improving the drinking taste of soy milk. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 The figure is a schematic cross-sectional structure diagram of a food processor in one embodiment of the present invention.

[0030] Figure 2 The figure is a schematic diagram of the explosion structure of the machine head in one embodiment of the present invention.

[0031] Figure 3 It is a structural front view of a crushing cover in one embodiment of the present invention.

[0032] Figure 4 It is a top view of the structure of the crushing cover in one embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the liquid flow outside the crushing cover when the crushing blade rotates in one embodiment of the present invention.

[0034] Figure 6 It is a schematic diagram of the liquid flow inside and outside the crushing cover when the crushing blade rotates in one embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the flow of materials into the crushing cover in one embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 10-cup body; 20-machine head; 21-machine head lower cover; 23-crushing blade; 24-upper cover; 22-motor; 30-crushing cover; 31-baffle; 32-first flow gap; 33-second flow gap; 40-air bubble. DETAILED DESCRIPTION

[0038] 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.

[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 different from 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 orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. 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, rather than indicating or implying 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 "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 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 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.

[0043] like Figure 1-7 As shown, in one embodiment of the present invention, a soymilk machine is provided, such as Figure 1As shown, the machine head 20 includes a cup body 10 and a machine head 20 mounted on the cup body 10, the machine head 20 includes a machine head lower cover 21, and a detachable crushing cover 30 is arranged at the front end of the machine head lower cover 21. For example, in this embodiment, the crushing cover 30 is screwed to the front end of the machine head lower cover 21, and the top wall of the crushing cover 30 extends horizontally. A motor 22 is arranged in the machine head lower cover 21, and a rotating shaft driven by the motor 22 penetrates the top wall of the crushing cover 30 and extends into the crushing cover 30, and a crushing blade 23 is installed at the end of the rotating shaft. Preferably, the machine head includes an upper cover 24 covered on the machine head lower cover 21, and the upper cover 24 and the machine head lower cover 21 enclose a mounting cavity for mounting the motor 22. It should be noted that the machine head lower cover 21 can be selected as a metal lower cover or a plastic lower cover, or the machine head lower cover includes a metal lower cover and a plastic lower cover installed in the metal lower cover; or the machine head lower cover includes a metal lower cover or a transition bracket installed in the metal lower cover, wherein the plastic lower cover or the transition bracket located in the metal lower cover can be used to fix the motor. Since the metal lower cover will extend into the cup body and adhere to the slurry, the metal lower cover is used to facilitate the cleaning of the machine head.

[0044] It should also be noted that the present invention is not limited to the detachable matching of the crushing cover and the lower cover of the machine head. In fact, the crushing cover can be formed integrally with the lower cover of the machine head.

[0045] like Figure 3 , Figure 4 As shown, the side wall of the crushing cover 30 has a plurality of baffles 31 arranged at intervals along the circumferential direction. In this embodiment, six baffles 31 are provided. Of course, the baffles 31 can also be provided as 4 or 8. A flow gap is formed between two adjacent baffles 31. The lower end contour of the crushing cover 30 forms a continuous wave shape. The lower end of the contour of the baffle 31 forms a trough, and the upper end of the contour of the flow gap forms a crest. The flow gap includes a first flow gap 32 with a height of H1 from the crest to the top wall of the crushing cover and a second flow gap 33 with a height of H2 from the crest to the top wall of the crushing cover. The first flow gap 32 and the second flow gap 33 are alternately arranged along the circumference of the crushing cover, H1<H2, and 0≤H1≤6mm, 10mm≤H2≤15mm.

[0046] The present invention makes the crushing cover 30 detachable relative to the machine head lower cover 21. Compared with the integrated design, the present invention prevents the inconvenience of demolding the machine head lower cover 21 due to the improvement of the crushing cover 30 alone, realizes the independent manufacturing of the machine head lower cover 21 and the crushing cover 30, and facilitates further optimization of the crushing cover 30. The top wall of the crushing cover 30 extends horizontally, and the side wall of the crushing cover 30 has a plurality of baffles 31 arranged at intervals along the circumferential direction, and a flow gap is formed between two adjacent baffles 31. The height H1 from the wave crest of the first flow gap 32 to the top wall of the crushing cover 30 is less than the height from the wave crest of the second flow gap 33 to the top wall of the crushing cover 30. The first flow gap 32 and the second flow gap 33 are arranged alternately, so that a wavy profile is formed at the bottom of the crushing cover 30, and the height of the wave crest of the wavy profile is different, so that the liquid flow flowing out of different flow gaps has a pressure difference. Refer to Figure 1 , Figure 6 As shown in the figure, the arrow shows the direction of liquid flow. Figure 5 As shown, the shaded area shown by P1 is the liquid flow space outside the first flow gap of the crushing cover, and the shaded area shown by P2 is the liquid flow space outside the second flow gap of the crushing cover. The pressure difference of the liquid flows out of different flow gaps causes different liquid flow speeds in the P1 and P2 spaces, which promotes the mixing of the liquid flows in the two spaces, and then effectively mixes the liquid outside the crushing cover, thereby improving the circulation effect, thereby improving the crushing effect. It is beneficial to ensure the consistency of the crushing rate, improve the circulation effect, and thus improve the crushing effect.

[0047] The inventors have found through research that the alternating arrangement of the first flow gap 32 and the second flow gap 33 is also beneficial to the dynamic balance when the crushing blade 23 beats the liquid flow, so that the head 20 does not shake or vibrate significantly during the beating process of the crushing blade 23. Since H1<H2, the opening height of the second flow gap 33 is smaller, and the opening height of the first flow gap 32 is larger, satisfying 10mm≤H2≤15mm, preventing H2 from being too large to cause insufficient gap height (small gap), obstructing the outflow of materials, affecting circulation, and preventing H2 from being too small to be unfavorable for the crushing cover 30 to gather and reflect the materials, which is beneficial to avoid liquid splashing; 0≤H1≤6mm, to ensure that the materials are quickly replenished to the crushing cover 30, prevent cavitation noise caused in the crushing cover 30, and reduce working noise. Moreover, the setting of the first flow gap 32 and the second flow gap 33 can prevent the formation of cleaning dead corners on the inner side of the crushing cover 30, making it easy to clean. And the top wall of the crushing cover 30 extends horizontally, which can be fitted or directly packaged as the front end wall of the lower cover 21 of the machine head, and the structure is reliable. In summary, the first flow gap 32 and the second flow gap 33 are set to meet the size of 10mm≤H2≤15mm and 0≤H1≤6mm, so as to effectively control the noise and improve the crushing effect. The inventor has verified through experiments that the above parameter settings can eventually achieve a slag discharge rate of no more than 8%, that is, to meet the secondary crushing requirements for pure soy milk production (the slag discharge rate required for the first crushing is no more than 4%, the slag discharge rate required for the second crushing is no more than 8%, and the slag discharge rate required for the third crushing is no more than 25%).

[0048] The inventors conducted the following series of tests: Figure 1 The food processor shown in the figure is used for pulping test. When pulping, a motor with a speed range of 13000rmb-18000rmb is used, 80g dry soybeans and 1000ml water are used to make pure soybean milk. The inventors obtained the following experimental results, as shown in Table 1, when the first flow gap and the second flow gap have different values, the amount of soybean dregs after each pulping (the amount of soybean dregs obtained by filtering with 80 mesh and drying) is recorded.

[0049] Table 1

[0050]

[0051] The inventors found through the above experimental data that when H1 and H2 are combined with different values, different amounts of okara can be obtained. According to the standard that the slag discharge rate required for primary crushing is not higher than 4%, the slag discharge rate required for secondary crushing is not higher than 8%, and the slag discharge rate required for tertiary crushing is not higher than 25%, the amounts of okara required for primary, secondary and tertiary crushing are not higher than 3.2g, 6.4g and 24g, respectively.

[0052] Combined with the above experimental data analysis, when the values ​​of H1 and H2 are equal, the amount of bean dregs is at least 7g and even obvious particles can be seen, and the slag discharge rate is as high as 8.8%, which cannot meet the secondary crushing requirements (not higher than 8%). Therefore, the food processor provided in this embodiment has a significantly improved crushing effect compared to the traditional crushing cover with a uniform flow notch height. When 10mm≤H2≤15mm and 0≤H1≤6mm, the amount of bean dregs is not higher than 6.3g, that is, the slag discharge rate is not higher than 7.8%, that is, the secondary crushing requirements are met. When 4mm≤H1≤5mm, 12mm≤H2≤15mm, the amount of bean dregs is not higher than 4.6g, the slag discharge rate is not higher than 5.7%, and the slag discharge rate is lower than 6%. Even if the primary crushing requirements are not met, the taste of the prepared soy milk is further improved.

[0053] As a preferred embodiment, H1 and H2 can be selected from the above experimental data as: H1=4mm, H2=12mm; or, H1=4mm, H2=14mm; or, H1=5mm, H2=14mm; and other values ​​within the above preferred range, for example: H1=4mm, H2=13.5; or, H1=4.5mm, H2=13.5; or, H1=15mm, H2=0, etc.

[0054] It should be noted that in one embodiment of the present invention, H1 can be selected as 0, that is, the wave crest of the first flow gap extends to the top wall of the crushing cover, and slurry splashing can be avoided by setting H2 to 11mm, 13mm, 14mm or 15mm, etc. Of course, in order to further reduce the probability of slurry splashing, avoid the risk of slurry overflow, and reduce slurry splashing noise, more preferably, 0

[0055] During the research process, the inventors found that different size settings of the flow gap will also cause differences in the size of the crushing noise. Therefore, in further experiments, while keeping 10mm≤H2≤15mm and 0≤H1≤6mm, experiments were conducted on different parameter settings for the height difference H3 between the peak of the first flow gap 32 and the peak of the second flow gap 33. As shown in Table 2, the slag discharge rate after each pulping and the noise during the pulping process were recorded when the height difference H3 had different values.

[0056] Table 2

[0057]

[0058]

[0059] The inventors found through the above experimental process and experimental data analysis that Figure 1 , Figure 6 ​The figure shows the direction of liquid flow when the crushing blade rotates at high speed. Figure 7 As shown, when the crushing blade rotates at high speed, it will drive the water flow to rotate, and there will be air bubbles in the water. The flow rate near the blade is fast and the pressure is low, so the bubbles will precipitate from the liquid, thereby forming many air bubbles 40 above the blade. Excessive air bubbles 40 will cause cavitation noise in the crushing cover 30, and the noise will be loud during the crushing process. Therefore, it is necessary to increase the flow gap to release air bubbles to reduce the cavitation noise at the position of the crushing blade. However, the increase in the flow gap will cause the crushing cover to have a poor effect on material aggregation, which is not conducive to the reflection of the material in the crushing cover 30, and the probability of collision between the material and the blade will decrease. At the same time, after the material flows out of the crushing cover, the liquid flow cannot be quickly replenished to the crushing cover, and the crushing efficiency will decrease. Therefore, the inventor has verified through the above experiments that by further optimizing the size of the first flow gap 32 and the second flow gap 33, since H1<H2, the opening height of the first flow gap is greater than the opening height of the second flow gap, the first flow gap is used to release air bubbles to reduce the cavitation noise at the position of the crushing blade, and the second flow gap is used to reduce the opening to concentrate the material in the crushing cover, and the height difference H3 formed by the two wave peaks is set to 4mm≤H3≤14mm to solve the contradiction between the crushing effect and the noise effect caused by the flow gap being too large or too small. After experiments, it is found that when the above parameter settings are adopted, the final slag discharge rate is not higher than 8%, which can meet the secondary crushing requirements of pure soy milk production. At the same time, the maximum working noise is 67dB, not higher than 70dB, which meets the first-level requirements. (The first-level requirements for the processing noise level of the soymilk machine are not higher than 70dB, the second-level requirements are not higher than 75dB, and the third-level requirements are not higher than 80dB). Therefore, while improving the crushing effect, the working noise is reduced and the user experience is improved.

[0060] The inventors further analyzed the experimental data and found that when 8mm≤H3≤10mm, the noise is no more than 65dB, the slag discharge rate is no more than 5%, and the food processor can achieve further optimization of noise reduction effect and crushing rate. As a preferred embodiment, H3 can be selected as: 8mm, 9mm, 9.5mm or 10mm.

[0061] like Figure 7 As shown, in a preferred embodiment, the average height from the root plane of the crushing blade 23 to the top wall of the crushing cover 30 is H4, wherein H4≥H2. In this embodiment, the side wall of the crushing cover 30 is an outwardly convex spherical arc surface.

[0062] By making the side wall of the crushing cover 30 convex to a spherical arc surface, when the materials collected in the crushing cover 30 are centrifugally beaten by the crushing blades 23, as shown in FIG. Figure 7The arrow direction is the material flow and rebound direction. The material enters the crushing cover from bottom to top. When it hits the side wall of the crushing cover with a spherical arc surface, it rebounds to the blade of the crushing blade 23, which can increase the probability of the material rebounding to the blade of the crushing blade 23, thereby improving the crushing effect and achieving the level of no filter. In addition, the crushing cover of this embodiment has a rounded and beautiful shape, and there is no problem of cleaning dead corners, which greatly solves the problem of difficult cleaning for consumers.

[0063] By setting H4≥H2, the crushing blade 23 is lower than the peak of the second flow gap 33, thereby ensuring the distance between the crushing blade 23 and the top wall of the crushing cover 30, avoiding material jamming and motor stalling, which is beneficial to improving the temperature rise of the motor. Moreover, the average height from the crushing blade 23 to the top wall of the crushing cover 30 is set within a reasonable range. Experimental verification shows that satisfying 15mm≤H4≤17mm can make the material rebound to the blade position of the crushing blade 23 after passing through the side wall of the crushing cover 30, thereby achieving effective crushing and improving the crushing effect.

[0064] like Figure 7 As shown, in a preferred embodiment, the flow opening area surrounded by the lower ends of the multiple baffles 31 is S1, the sum of the areas of the multiple flow gaps is S2, S2 / S1=0.35-0.55, more preferably, the flow opening is the feed port, and the flow gap is the discharge port, wherein S2 / S1=0.41-0.51. Optionally, S2 / S1=0.45 or 0.49.

[0065] Different values ​​of S2 / S1 were selected to record the noise level during pulping and the amount of dregs after pulping, as shown in Table 3.

[0066] Table 3

[0067]

[0068] By setting the area and ratio of the flow opening and the flow gap, the material inlet and outlet ratio of the crushing cover 30 is reasonable, the crushing consistency is improved, and the crushing is more thorough. S2 / S1=0.41-0.51, so that the sizes of the first flow gap 32 and the second flow gap 33 are reasonably matched, so as to avoid the ratio of the material in and out of the crushing cover 30 being too large or too small, resulting in poor centralized crushing and empty beating noise in the crushing cover 30. The first flow gap 32 and the second flow gap 33 are arranged alternately. If S2 / S1 exceeds 0.51, the cavitation noise caused by the inability of the liquid flow to quickly return to the crushing cover 30 will occur, and the crushing blade 23 will have an empty beating noise, and the ability of the crushing cover 30 to concentrate the material on the material will be reduced, and the material is not easy to be concentrated in the crushing cover 30 for crushing, resulting in the crushing rate not reaching the level of the second level without filtration. When S2 / S1 is less than 0.41, although the crushing cover 30 can accommodate more materials in the crushing cover 30 without jumping out, the materials cannot be effectively crushed, the slag output is large, and the crushing rate still cannot reach the level of the second level without filtration.

[0069] In a preferred embodiment, the heights from the wave valleys formed by the plurality of baffles 31 to the top wall of the pulverizing cover 30 are equal.

[0070] By making the height from the trough formed by the multiple baffles 31 to the top wall of the crushing cover 30 equal, that is, setting the bottom ends of the multiple baffles 31 to the same height, the material in the feed space formed between the bottom of the cup body and the crushing cover 30 can flow evenly into the crushing cover 30, thereby improving the crushing consistency, and then improving the crushing effect and crushing efficiency. In addition, after the head 20 is removed from the cup body, the head 20 can be placed independently and stably on the workbench.

[0071] In a preferred embodiment, the area of ​​a single baffle plate 31 is larger than the area of ​​a single second flow gap 33 .

[0072] By setting the area of ​​the baffle plate 31 to be larger than the area of ​​the second flow gap 33, on the basis of ensuring the effective flow gathering and crushing effect of the crushing cover 30, the material can smoothly enter and exit the crushing cover 30, thereby improving the material circulation crushing and the crushing effect.

[0073] Anything not described in the present invention can be achieved by adopting or drawing on existing technologies.

[0074] 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.

[0075] The above description is only an embodiment of the present invention and is 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 substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A soymilk machine, comprising a cup body and a machine head mounted on the cup body, the machine head comprising a machine head lower cover, a crushing cover being arranged at the front end of the machine head lower cover, characterized in that: The top wall of the crushing hood extends horizontally, a motor is arranged in the lower cover of the machine head, a rotating shaft driven by the motor passes through the top wall of the crushing hood and extends into the crushing hood, and a crushing blade is installed at the end of the rotating shaft, the side wall of the crushing hood has a plurality of baffles arranged at intervals along the circumferential direction, and a flow gap is formed between two adjacent baffles, the lower end contour of the crushing hood 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 flow gap forms a crest, the flow gap includes a first flow gap with a height of H1 from the crest to the top wall of the crushing hood and a second flow gap with a height of H2 from the crest to the top wall of the crushing hood, the first flow gap and the second flow gap are alternately arranged along the circumference of the crushing hood, H1<H2, and, 0≤H1≤6mm, 10mm≤H2≤15mm.

2. A soymilk machine according to claim 1, characterized in that: A height difference H3 is formed between the wave crest of the first flow-through gap and the wave crest of the second flow-through gap, wherein 3.9 mm≤H3≤14.9 mm.

3. A soymilk machine according to claim 1, characterized in that: The heights from the troughs formed by the plurality of baffles to the top wall of the pulverizing cover are equal.

4. A soymilk machine according to claim 1, characterized in that: The area of ​​a single baffle plate is larger than the area of ​​a single second flow-through gap.

5. A soymilk machine according to claim 1, characterized in that: The average height from the root plane of the crushing blade to the top wall of the crushing cover is H4, wherein H4≥H2, wherein 15mm≤H4≤17mm.

6. A soymilk machine according to claim 1, characterized in that: The flow opening area surrounded by the lower ends of the plurality of baffles is S1, and the sum of the areas of the plurality of flow gaps is S2, where S2 / S1=0.35-0.

55.

7. A soymilk machine according to claim 6, characterized in that: The open flow port is a feed port, and the open flow gap is a discharge port, wherein S2 / S1=0.41-0.

51.

8. The soymilk machine according to claim 1, characterized in that: The number of the baffles is 4, 6 or 8.

9. The soymilk machine according to claim 1, characterized in that: The side wall surface of the crushing cover is an outwardly convex spherical arc surface.

10. The soymilk machine according to claim 1, characterized in that: 4mm≤H1≤5mm,12mm≤H2≤15mm.

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