Soybean milk machine easy to clean

Abstract

The invention relates to kitchen appliances, in particular to an easy-to-clean soybean milk maker which comprises a cup body and a maker head, the maker head comprises a metal lower cover, a smashing cover is integrally formed at the front end of the metal lower cover, the metal lower cover is connected with the smashing cover through a transition arc surface, and a motor is arranged in the metal lower cover. A rotating shaft driven by a motor penetrates through the top wall face of the smashing cover and extends into the smashing cover, smashing blades are installed at the tail end of the rotating shaft, a plurality of flow baffles which are arranged at intervals in the circumferential direction are arranged on the outer wall of the smashing cover, a flow passing notch is formed between every two adjacent flow baffles, and the outline of the lower end of the smashing cover is in a continuous wave shape. The lower end of the outline of the flow baffle forms a wave trough, the upper end of the outline of the flow passing notch forms a wave crest, and the average height H1 from the wave crest to the top wall face of the smashing cover is 4-20 mm. The soybean milk machine is simple in structure, no cleaning dead angle exists, and the transition arc surface can be automatically washed clean; and during working, the safety risk of liquid splashing is avoided, and the filtering-free level II can be achieved.

Description

Technical Field

[0001] The invention relates to kitchen appliances, in particular to an easy-to-clean soybean milk maker. Background Art

[0002] Early household soymilk machines included a machine head and a cup body. A crushing blade was set on the machine head. The crushing blade was used to crush soybeans to make soymilk. Since there were many small bean pieces that were not completely crushed in the bean dregs, in order to meet the requirements of drinking taste, early soymilk needed 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, and increase the speed of the motor to improve the crushing efficiency, such as patent numbers CN200820043214.7 and CN201510279186.3. Although the above patent solutions have indeed improved the crushing to a certain extent and improved consumers' drinking requirements for taste. However, there are also some shortcomings in the application process of the above solution products. For example, since the crushing cover needs to be assembled on the machine head, the processing and installation of the crushing cover are relatively complicated, and the machine head also has the safety risk of water ingress and leakage. For example, there are blind corners in the spoiler holes of the crushing cover and the connection between the machine head and the crushing cover. The residue stains remaining in the dead corners after pulping are difficult to clean.

[0003] With the development of soymilk machines, based on the needs of reducing costs and simplifying the machine head, R&D personnel thought of designing the crushing cover and the machine head into an integrated structure, such as patent numbers CN201020578703.X and CN201721211944.9. Among them, patent CN201721211944.9 discloses that the lower end of the metal lower cover is integrally formed with an auxiliary crushing part. The inventor found in the process of studying the patent that during pulping, the outer surface of the metal lower cover is continuously in contact with the slurry, and the motor also conducts heat outward through the metal lower cover. The slurry and slurry residue in contact with the metal lower cover will adhere to the outer surface of the metal lower cover after being heated and emulsified by the heat conducted to the metal lower cover. In particular, after the pulping is completed, the user needs to take out the machine head to pour out the slurry. During the period when the machine head is taken out, the slurry residue and slag stains on its surface will be dried by the internal residual heat and the external air, which will cause the residual stains to have stronger adhesion and be difficult to clean, causing a lot of trouble to consumers.

[0004] Another patent CN201020578703.X discloses that the lower part of the head is cylindrical, and the grinder and the head are integrally formed. Since the lower part of the grinder is open, and the surface of the grinder is spirally or tilted with a diversion opening, it can achieve enhanced water circulation, form eddy currents, improve grinding effects, and reduce motor loads. The inventor has also conducted further research based on the above structure. After verification, it was found that when the motor speed below 10,000 rmb is used to drive the crushing blade for pulping (before 2013, the mainstream motor speed used by ordinary soybean milk machines), compared with the netless soybean milk machine with the same motor speed, the crushing effect of the material can be improved, the crushing rate of soybeans can reach 50%, and the bean dregs after filtering are 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 (drinking without filtering). Based on this, the inventor wanted the soymilk machine head to have a simple structure and to obtain soymilk with a better taste, so under the above-mentioned soymilk machine structure, a motor speed of more than 12000rmb was used to drive the crushing blade for beating (after 2013, the mainstream speed of the motor used in ordinary soymilk machines). After experimental verification, the inventor found that when beating the soymilk, there is a high probability of serious splashing of the soymilk machine, which can easily scald consumers. Moreover, although the crushing rate of the soymilk can be increased to 60% and the residue feeling when drinking is reduced, it still cannot reach the inventor's expected filter-free II level (the soymilk made from 80g of dry soybeans is required to be less than 20g of the bean dregs obtained after filtering through an 80-mesh sieve after drying). Summary of the invention

[0005] The object to be achieved by the present invention is to provide a soymilk machine, the metal lower cover of the soymilk machine is connected as a whole with the grinding cover through a concave transition arc surface, the machine head has a simple structure, and the machine head surface can be automatically rinsed clean by beating water in the cup body by the machine head, and there is no problem of cleaning dead corners; moreover, when the soymilk machine is working, there is no safety risk of liquid splashing, and the soymilk produced can reach the level of filter-free II level (the soymilk made from 80g of dry soybeans is required to obtain the bean dregs after filtering through an 80-mesh sieve, and then dried to be less than 20g).

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an easy-to-clean soybean milk machine, comprising a cup body and a machine head installed on the cup body, the machine head comprising a metal lower cover, the front end of the metal lower cover being integrally formed with a crushing cover, characterized in that: the metal lower cover is connected to the crushing cover through a transition arc surface recessed toward the center of the machine head, the top wall surface of the crushing cover is located between the horizontal plane where the top end of the transition arc surface is located and the horizontal plane where the bottom end of the transition arc surface is located, a motor is arranged in the metal lower cover, a rotating shaft driven by the motor passes through the top wall surface of the crushing cover and extends into the crushing cover, and a crushing blade is installed at the end of the rotating shaft, the outer wall of the crushing cover has a plurality of baffles arranged at intervals in 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, the upper end of the contour of the flow gap forms a crest, and the average height from the crest to the top wall surface of the crushing cover is H1, H1=4mm~20mm.

[0007] Furthermore, the fillet R of the transition arc surface is 10 mm to 30 mm;

[0008] Alternatively, the area of ​​a single baffle is greater than the area of ​​a single flow-passing notch;

[0009] Alternatively, H1=6mm~16mm.

[0010] Furthermore, the average height from the root plane of the crushing blade to the top wall of the crushing cover is H2, wherein H2>H1.

[0011] Furthermore, the flow opening area surrounded 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.

[0012] Furthermore, the flow-through opening is a feed port, and the flow-through notch is a discharge port, wherein S2 / S1=0.4-0.5.

[0013] Furthermore, the number of the baffles is 5 to 8.

[0014] Furthermore, the metal lower cover and the crushing cover are integrally cast with an aluminum matrix;

[0015] Alternatively, the outer surface of the metal lower cover is provided with a non-stick coating;

[0016] Alternatively, a non-stick coating is provided on the transition arc surface;

[0017] Alternatively, the exposed surfaces of the crushing cover are all provided with a non-stick coating.

[0018] Furthermore, a motor mounting portion for mounting a motor is integrally formed on the inner wall of the metal lower cover, and the motor mounting portion is arranged higher than the transition arc surface.

[0019] Furthermore, the flow gap includes a first flow gap and a second flow gap having different average heights from the wave crest to the top wall of the crushing cover, and the first flow gap and the second flow gap are alternately arranged along the circumference of the crushing cover.

[0020] Furthermore, the outer surface of the crushing cover is an outwardly convex spherical arc surface, wherein the tangent line of the spherical arc surface is parallel to the tangent line of the transition arc surface;

[0021] Alternatively, the inner and outer surfaces of the crushing cover are both spherical arc surfaces;

[0022] Alternatively, the soymilk maker has a self-cleaning operation, and during the self-cleaning operation, the motor drives the crushing blade to beat the liquid at a rotation speed of 13000rmb to 18000rmb.

[0023] With respect to the structure disclosed in patent CN201020578703.X, the inventor has found through research that this solution is prone to liquid splashing after the motor speed exceeds 12000rmb, especially when the surface of the machine head is washed with whipping 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. Moreover, under the above patent structure, although the motor speed is increased and the crushing rate is also improved, it still does not reach the filter-free II level expected by the inventor. The reason for this phenomenon is that the inventors of the present invention have conducted research and analysis and found that under the structure of the soymilk machine, the wave crest at the bottom of the grinder extends to near the outer bottom surface of the machine head (the wave crest is almost located on the outer bottom surface of the machine head). When the rotation speed of the crushing blade exceeds 12000rmb, while the crushing blade drives the liquid flow to rotate, the centrifugal force exerted on the liquid flow increases accordingly, thereby increasing the initial velocity of the liquid flow rushing out of the wave crest of the guide opening. In addition, the lower part of the grinder is in the shape of a straight cylinder. The liquid flow will splash out from the cup mouth unimpeded at a higher initial velocity. Therefore, liquid splashing is likely to occur, posing a risk of scalding consumers.

[0024] In order to solve the splashing problem and to further improve the crushing rate, the inventors have made improvements and upgrades based on the above patent solution, thereby obtaining the technical solution of the present invention. In the solution of the present invention, the metal lower cover and the crushing cover are still formed in one piece, wherein the two are connected by a transition arc surface that is recessed toward the center of the machine head, the top wall surface of the crushing cover is located between the horizontal plane where the top end of the transition arc surface is located and the horizontal plane where the bottom end of the transition arc surface is located, and the outer wall of the crushing cover has a plurality of baffles arranged at intervals in 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 baffle contour forms a trough, and the upper end of the contour of the flow gap forms a peak, and the average height H1 from the peak to the top wall of the crushing cover satisfies 4mm to 20mm. The inventors have discovered through research that when the rotation speed of the crushing blade exceeds 12,000 rmb and the height H1 of the wave crest from the top wall of the crushing cover is less than 4 mm, the crushing blade beats the cleaning water and splashes more often because the wave crest is closer to the liquid surface, especially when beating a low amount of water to clean the machine head, splashing occurs almost every time the water is beaten; and when H1 is designed to be greater than 4 mm, as the H1 design becomes larger, the distance between the wave crest and the liquid surface becomes farther and farther, and when the crushing blade beats the cleaning water, the liquid surface will tend to be stable, thereby reducing the phenomenon of liquid splashing. The inventor found through experimental tests and analytical research that under the head structure of the present invention, when the crushing blade beats the liquid flow at a speed of not less than 12000rmb, and the height H1 of the wave peak from the top wall of the crushing cover is 4mm~20mm, not only is there less splashing, but also when the crushing blade beats the cleaning water, the concave transition arc surface can be automatically flushed and cleaned, and it can also be automatically flushed and cleaned, which solves the problem of consumers having to clean manually.

[0025] Among them, when the crushing blade beats the cleaning water, driven by the rotation of the crushing blade, the cleaning water flow will rotate centrifugally at high speed along with the crushing blade. Since the front part of the metal lower cover presents a neck contraction structure, the cleaning liquid flow in high-speed centrifugal motion will form a stronger vortex around the concave transition arc surface. The rotating vortex will accelerate the flow rate of the liquid flow around the transition arc surface, thereby realizing the vortex to strongly rotate and flush the surface of the transition arc surface, and peel off the slag stains on the transition arc surface. Under the structure of the present invention, when H1 is greater than 20mm, since the wave crest is far away from the liquid surface, when the crushing blade beats the cleaning water, the liquid surface stability will be better, and the cleaning water flow is not easy to form a vortex around the transition arc surface, and it is even more impossible to effectively flush and clean the surface of the transition arc surface at high speed, thereby failing to peel off the residual slag stains adhering to the transition arc surface. When H1 is less than 4mm, although the wave crest is closer to the liquid surface and eddies are easily formed, the rotation speed of the crushing blade is relatively high at this time, exceeding 12,000rmb, causing the cleaning water on the liquid surface to be chaotically disturbed and jump, and unable to form a stable eddy current to flush and clean the transition arc surface. At this time, the cleaning consistency of the transition arc surface is poor, and some areas will have obvious mucous membrane residues. In the present invention, H1 is limited to 4mm to 20mm, which can better ensure that the transition arc surface is well flushed and cleaned at high speed, and the cleaning consistency is good. Compared with the existing soymilk machine head structure, the solution of the present invention does not have the problem of cleaning dead corners, and the head shape structure of the present invention is more rounded and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] Figure 1 A structural schematic diagram of a soymilk machine of the present invention;

[0028] Figure 2 for Figure 1 The structural diagram of the middle machine head;

[0029] Figure 3 for Figure 2 Schematic diagram of the inverted structure of the middle machine head. DETAILED DESCRIPTION

[0030] like Figure 1 , Figure 2 , Figure 3The figure is a schematic diagram of the structure of a soymilk machine of the present invention. A soymilk machine comprises a cup body 1 and a machine head 2 mounted on the cup body 1, the machine head 2 comprises a metal lower cover 21, a crushing cover 22 is integrally formed at the front end of the metal lower cover 21, the metal lower cover 21 and the crushing cover 22 are connected via a transition arc surface 23 recessed toward the center of the machine head, the top wall surface 221 of the crushing cover 22 is located between the horizontal plane A where the top end of the transition arc surface is located and the horizontal plane B where the bottom end of the transition arc surface is located, a motor 3 is arranged in the metal lower cover 21, and a rotating shaft 31 driven by the motor 3 penetrates the top wall of the crushing cover 22. The surface 221 extends into the crushing cover 22, and a crushing blade 4 is installed at the end of the rotating shaft 31. The outer wall of the crushing cover 22 has a plurality of baffles 222 arranged at intervals in the circumferential direction, and a flow gap 223 is formed between two adjacent baffles 222. The lower end contour of the crushing cover 22 forms a continuous wave shape, the lower end of the contour of the baffle 222 forms a trough, and the upper end of the contour of the flow gap 223 forms a crest. The average height from the crest to the top wall of the crushing cover 22 is H1, and H1=4mm~20mm.

[0031] In this embodiment, the metal lower cover 21 and the crushing cover 22 are integrally cast through an aluminum matrix, and a motor mounting portion 213 is integrally formed on the inner wall of the metal lower cover 21, and the motor 3 is fixed on the motor mounting portion 213, wherein the motor mounting portion 213 is arranged higher than the transition arc surface 23 to reduce the heat generated by the motor 3 during operation from being directly transferred to the transition arc surface 23.

[0032] In this embodiment, there are five baffles 222 of the crushing cover 22, and the area of ​​a single baffle 222 is larger than the area of ​​a single flow gap 223, and the fillet of the transition arc surface 23 is R. In this embodiment, the flow opening surrounded by the lower end of the baffle 222 is the feed port, and the area of ​​the feed port formed is S1, the flow gap 223 is the discharge port, and the sum of the areas of the flow gaps 223 is S2, wherein the height from the upper plane of the root of the crushing blade 4 to the top wall 221 of the crushing cover is H2, and in this embodiment, H2>H1, so that the user can use a cleaning brush to clean the upper surface of the crushing blade 4 when necessary. In this embodiment, the outer surface of the crushing cover 22 is a convex spherical arc surface, and the tangent of the spherical arc surface of the outer surface is arranged parallel to the tangent of the transition arc surface 23.

[0033] The inventors have found through research that when the motor speed exceeds 12000rmb and S1 / S2=0.35-0.55, the soybean milk made by the soybean milk machine can reach the level of free filtration I (the soybean milk made by 80g dry soybeans and 1000ml water is required to be filtered through an 80-mesh sieve to obtain bean dregs, which are less than 30g after drying). When S2 / S1 exceeds 0.55, the ability of the crushing cover to concentrate the crushing of materials becomes poor, and the materials are not easy to be concentrated in the crushing cover for crushing, resulting in the crushing rate not reaching the level of free filtration I. When S2 / S1 is less than 0.35, although the crushing cover can accommodate more materials in the crushing cover without jumping out, the crushing blade is prone to empty beating during the beating process, resulting in a reduced chance of collision between the material and the crushing blade, so that the crushing rate does not reach the level of free filtration I. For this embodiment, in order to comprehensively consider the aesthetics, crushing rate and cleaning effect of the machine head, this embodiment preferably has S2 / S1=0.4-0.5.

[0034] The inventors conducted the following series of tests: while maintaining S2 / S1=0.4-0.5, and using Figure 1 , Figure 2 , Figure 3 The soymilk machine structure shown in the figure is used for pulping and cleaning tests. When pulping, a motor with a speed range of 13000rmb to 18000rmb is used, 80g of dry soybeans and 1000ml of water are used to make pure soymilk; and when cleaning, the amount of cleaning water is also 1000ml, and the same motor speed is still used to beat the cleaning water to automatically clean the machine head. By using the same procedure and the same conditions for pulping and cleaning verification, the inventor obtains the following experimental results. As shown in Table 1, when H1 takes different values, the experimental phenomena occurring during each pulping and cleaning process are recorded, as well as the amount of bean dregs after the corresponding pulping (the amount of bean dregs obtained by filtering with 80 mesh and drying).

[0035] Table 1 Experimental records obtained when H1 takes different values

[0036]

[0037]

[0038] The inventor found through experimental records that under the structure of the soymilk machine of this embodiment, when H1 selects different values, different experimental phenomena and different amounts of bean dregs will be obtained. Among them, as the value of H1 increases, the cleaning effect of the transition arc surface changes from: poor → good → poor; the splashing phenomenon changes from: multiple splashing → a small amount of splashing → no splashing; and the amount of bean dregs changes from: little → more. When H1 is selected to be less than 4mm, there will be visible residue on the surface of the transition arc surface. After cleaning, you can feel the residual residue film that has not been cleaned clean by touching it with your hand, and it is obviously sticky. At the same time, whether it is pulping or beating water during cleaning, it is easy to cause water droplets to splash, and when beating the liquid, the liquid surface is chaotic. The smaller H1 is, the more chaotic the liquid surface is, the more likely it is to cause splashing, and the noise of the soymilk machine is also louder. However, when H1 is small, due to the violent disturbance of the liquid surface, the probability of disordered collision between the bean material and the crushing blade increases. The inventors found through statistics on the amount of bean dregs after pulping that when H1 is less than 4mm, the amount of bean dregs obtained is generally less than 16g, and the crushing rate far exceeds the inventors' expectations. In addition, when H1 is selected to be greater than 20mm, the bean dregs are beaten by the crushing blades during pulping and cleaning, and the liquid surface is relatively stable, and splashing almost never occurs. However, during the pulping process, the crushing blades are prone to empty beating, and the probability of collision between the bean material and the crushing blades in the crushing cover is reduced. The amount of bean dregs increases, and sometimes even a little bit of bean pieces can be found in the bean dregs. Although the amount of bean dregs increases at this time, the crushing rate is still good. Although it fails to reach the filter-free level II required by the inventors, it is generally higher than the filter-free level I. Moreover, when H1 is selected to be greater than 20 mm, the cleaning effect of the transition arc surface gradually deteriorates, and a sticky residue film will be felt when touching the surface. Moreover, as the H1 value increases, the residue traces remaining on the transition arc surface become more and more obvious.

[0039] The inventors of the present invention have found through research that the reason for the above-mentioned phenomenon change is that when the crushing blade beats the cleaning water, the cleaning water flow will rotate centrifugally at high speed along with the crushing blade under the rotation of the crushing blade. Since the front part of the metal lower cover presents a neck contraction structure, the liquid flow in high-speed centrifugal motion will form a stronger vortex around the concave transition arc surface. The rotating vortex will accelerate the flow rate of the liquid flow around the transition arc surface, thereby realizing the vortex to strongly rotate and flush the surface of the transition arc surface, and peel off the residual residue stains on the transition arc surface. Under the structure of this embodiment, when H1 is greater than 20mm, because the wave crest is far away from the liquid surface, the liquid surface is more stable when the crushing blade beats the cleaning water, and the cleaning water flow is not easy to form a vortex to flush the transition arc surface at high speed, so that the residual residue stains adhering to the transition arc surface cannot be completely peeled off, resulting in a strong sense of adhesion when a person touches the surface of the transition arc surface with his hand after cleaning. At the same time, when H1 is greater than 20mm, the wave crest is far away from the liquid surface. Under the obstruction of liquid pressure, the liquid flow discharged from the flow gap in the crushing cover is relatively slowed down, so that a negative pressure area will be formed around the crushing blade in the crushing cover. It is not easy for the bean material to enter the negative pressure area, resulting in empty hitting of the crushing blade, the number of collisions between the bean material and the crushing blade is reduced, the corresponding crushing rate is reduced, and the amount of bean dregs will increase.

[0040] When H1 is less than 4mm, although the wave crest is closer to the liquid surface and eddies are easily formed, the rotation speed of the crushing blade is relatively high at this time, exceeding 12,000rmb, causing the cleaning water on the liquid surface to be violently and chaotically disturbed, and unable to form a stable eddy current to flush and clean the transition arc surface. At this time, the cleaning consistency of the transition arc surface is poor, and some areas will still have residual mucous membrane stains that are noticeable to the touch. Similarly, when H1 is less than 4mm, due to the strong disturbance of the liquid flow, the number of collisions between the bean material in the liquid flow and the crushing blade increases, and thus the crushing rate will increase accordingly. However, the process of liquid flow disturbance will also be accompanied by a large pulping noise. The inventor has found through testing and research that when H1 is less than 4mm, the pulping noise is almost always higher than 70dB, affecting consumers' experience of using the soymilk machine.

[0041] For the soymilk machine structure of the embodiment, H1 is limited to 4mm~20mm. While ensuring that the transition arc surface is well flushed and cleaned, and the cleaning consistency is good, a higher crushing rate can be achieved. The soymilk after pulping can reach the filter-free II level required by the inventor (the soymilk made from 80g of dry soybeans is required to be less than 20g of bean dregs after filtering through an 80-mesh sieve, and then dried). Moreover, the soymilk machine of the embodiment of the present invention has a simple structure, a round and beautiful shape, and no problem of dead corners for cleaning, which greatly solves the problem of difficult cleaning for consumers.

[0042] It should be noted that, for this embodiment, H1 is preferably 6mm to 16mm. Among them, the fillet R of the transition arc surface is generally selected to be 10mm to 30mm, and the larger the R is, the smoother and more natural the connection is, and the better the cleaning consistency of the transition arc surface will be. Among them, the choice of R can be selected according to the design requirements of the product. Of course, for this embodiment, the general flow opening at the lower end of the crushing cover is the feed port, and the flow gap is the discharge port. During the product design process, the R&D personnel can also design the crushing blade into a structure that presses down to push the liquid flow according to the design requirements. At this time, the flow opening becomes the discharge port, and the flow gap forms the feed port. Among them, the baffles are generally selected to be 5 to 8, and the present embodiment is preferably 5 to 6.

[0043] In order to further improve the cleaning effect of the machine head, the metal lower cover, the transition arc surface, and the exposed surface of the crushing cover can all be provided with a non-stick coating. Among them, the inner surface of the crushing cover can also be designed as a spherical arc surface structure, and is not limited to the planar structure of the approximate arc surface disclosed in this embodiment. In addition, for the flow gap of this embodiment, it can also include multiple flow gaps with different average heights from the crest to the top wall of the crushing cover, such as the first flow gap and the second flow gap. Of course, for a single flow gap, the average height H1 from the crest to the top wall of the crushing cover is required to be 4mm~20mm. Among them, the first flow gap and the second flow gap can also be arranged alternately along the circumference of the crushing cover, which is conducive 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, and at the same time, it is also conducive to the consistency of the crushing rate.

[0044] Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An easy-to-clean soybean milk machine, comprising a cup body and a machine head mounted on the cup body, wherein the machine head comprises a metal lower cover, and a crushing cover is integrally formed at the front end of the metal lower cover, characterized in that: The metal lower cover is connected to the crushing cover through a transition arc surface recessed toward the center of the machine head, the top wall surface of the crushing cover is located between the horizontal plane where the top end of the transition arc surface is located and the horizontal plane where the bottom end of the transition arc surface is located, a motor is arranged in the metal lower cover, a rotating shaft driven by the motor passes through the top wall surface of the crushing cover and extends into the crushing cover, and a crushing blade is installed at the end of the rotating shaft, the outer wall of the crushing cover has a plurality of baffles arranged at intervals in 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, the upper end of the contour of the flow gap forms a crest, and the average height from the crest to the top wall surface of the crushing cover is H1, H1=4mm~20mm.

2. The easily cleanable soybean milk maker according to claim 1, characterized in that: The fillet of the transition arc surface R = 10mm ~ 30mm; Alternatively, the area of ​​a single baffle is greater than the area of ​​a single flow-passing notch; Alternatively, H1=6mm~16mm.

3. The easy-to-clean soybean milk maker 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 H2, wherein H2>H1.

4. The easily cleanable soybean milk maker 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. S2 / S1=0.35~0.

55.

5. The easily cleanable soybean milk maker according to claim 4, characterized in that: The open flow port is a feed port, and the open flow gap is a discharge port, wherein S2 / S1=0.4-0.

5.

6. The easily cleanable soybean milk maker according to claim 1, characterized in that: The number of the baffles is 5 to 8.

7. The easily cleanable soybean milk maker according to claim 1, characterized in that: The metal lower cover and the crushing cover are integrally cast with an aluminum matrix; Alternatively, the outer surface of the metal lower cover is provided with a non-stick coating; Alternatively, a non-stick coating is provided on the transition arc surface; Alternatively, the exposed surfaces of the crushing cover are all provided with a non-stick coating.

8. The easily cleanable soybean milk maker according to claim 1, characterized in that: A motor mounting portion for mounting a motor is integrally formed on the inner wall of the metal lower cover, and the motor mounting portion is arranged higher than the transition arc surface.

9. The easily cleanable soybean milk maker according to claim 1, characterized in that: The flow gap includes a first flow gap and a second flow gap having different average heights from the wave crest to the top wall of the crushing cover, and the first flow gap and the second flow gap are alternately arranged along the circumference of the crushing cover.

10. The easily cleanable soybean milk maker according to claim 1, characterized in that: The outer surface of the crushing cover is an outwardly convex spherical arc surface, wherein the tangent line of the spherical arc surface is arranged parallel to the tangent line of the transition arc surface; Alternatively, the inner and outer surfaces of the crushing cover are both spherical arc surfaces; Alternatively, the soymilk maker has a self-cleaning operation, and during the self-cleaning operation, the motor drives the crushing blade to beat the liquid at a rotation speed of 13000rmb to 18000rmb.

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