WO2021088708A1

WO2021088708A1 - Food processor and processing method thereof

Info

Publication number: WO2021088708A1
Application number: PCT/CN2020/124648
Authority: WO
Inventors: 王旭宁; 黄忠元; 杨开清; 林小财; 郑明伟
Original assignee: 九阳股份有限公司
Priority date: 2019-11-04
Filing date: 2020-10-29
Publication date: 2021-05-14

Abstract

A food processor, comprising a stirring cup (2), a motor (8), and a crushing cutter (25) driven by the motor (8). The crushing cutter (25) comprises cutter blades (251) and a cutter shaft (252); a mounting hole (26) for mounting a shaft sleeve (3) is formed at the bottom of the stirring cup (2); the cutter shaft (252) penetrates through the shaft sleeve (3) and is in transmission fit with a motor shaft of the motor (8); the shaft sleeve (3) comprises a rigid inner wall (31) for surrounding the cutter shaft (252) to limit the cutter shaft (252), a rigid outer wall (32) matching the mounting hole (26), and an elastic layer (33) for separating the rigid inner wall (31) from the rigid outer wall (32); the elastic layer (33) comprises an elastic ring (331) used for wrapping the top of the rigid inner wall (31) from the upper side.

Description

Food processor and its processing method

This application claims the priority of the Chinese patent applications of 2019110650155, 202010224139X, 202010288903X. 2019110650155 is a Chinese patent application filed with the Chinese Patent Office on November 4, 2019 with the title of "A Low-Noise Food Processing Machine"; 202010224139X is A Chinese patent application filed with the Chinese Patent Office on March 26, 2020 with the title of "A food processor with good noise reduction effect"; 202010288903X was filed with the Chinese Patent Office on April 14, 2020 with the title of the invention " The entire content of the Chinese patent application for "a processing method of a food processor and a food processor" is incorporated into this application by reference.

Technical field

This application relates to the technical field of food processing, and in particular to a food processing machine and a processing method used in the food processing machine.

Background technique

The statements here only provide background information related to this application, and do not necessarily constitute prior art.

With the improvement of living standards, people are becoming more and more critical and demanding of food, hoping to get more nutrition in their daily diet to improve their personal physical condition. Therefore, the concept of health preservation is becoming more and more popular nowadays, and ordinary families also A variety of food processing machines are available.

Currently commonly used food processing machines, such as wall breakers, include a main engine with a built-in motor and a mixing cup. The bottom of the mixing cup is provided with a mounting hole for installing a shaft sleeve. The knife shaft of the crushing knife passes through the shaft sleeve to match the motor shaft of the motor. . In the prior art, the shaft sleeve includes a rigid inner wall, a rigid outer wall matched with a mounting hole, and an elastic layer separating the rigid inner wall and the rigid outer wall, and the crushing knife shaft directly or indirectly hardly contacts the rigid inner wall. When the wall breaker is working, the blade of the crushing knife and the knife shaft will swing when rotating. The vibration of the knife shaft will cause vibration between it and the rigid inner wall. The vibration of the knife shaft and the rigid inner wall will be transmitted to the mixing cup. It is transmitted to the outside through the cup mouth, etc., which makes the wall breaker produce a lot of noise. In order to reduce the noise from the cup cover of the food processor, the conventional solution is to install a feeding cover at the exhaust port, and form a tortuous exhaust channel through the gap between the feeding cover and the exhaust port, or through A tortuous exhaust channel is formed inside the feeding cover to extend the propagation path of noise to achieve the purpose of noise reduction. However, the exhaust channel of this solution is narrow and long, and the exhaust resistance is large. The air pressure in the mixing cup is released slowly, and foam or slurry is easy to overflow from the exhaust channel; moreover, the length of the exhaust channel is limited, which limits the noise reduction effect; In addition, the long and narrow exhaust channel has many dead spots for cleaning, and it is not easy to clean.

Summary of the invention

According to various embodiments of the present application, a food processing machine and a processing method for the food processing machine are provided.

A food processing machine includes a mixing cup, a motor, and a pulverizing knife driven by the motor. The pulverizing knife includes a knife wing and a knife shaft. The bottom of the mixing cup is provided with a mounting hole for installing a shaft sleeve. The shaft sleeve penetrates the motor shaft of the motor for transmission. The shaft sleeve includes a rigid inner wall for surrounding the cutter shaft to limit the cutter shaft, a rigid outer wall cooperating with the mounting hole, and a space between the rigid inner wall and The elastic layer of the rigid outer wall includes an elastic ring for wrapping the top of the rigid inner wall from the upper side.

A processing method for a food processing machine, the food processing machine includes a mixing cup, a motor, and a pulverizing knife driven by the motor, and the processing method includes a material ejection stage and an overflow mitigation stage. In the material ejection stage, the increase in the speed of the crushing knife per unit time gradually increases, so that the slurry forms a turbulent vortex to drive the bottom material of the mixing cup to eject; in the slowing down phase, the increase in the speed of the crushing knife per unit time gradually increases Decrease to draw the slurry and material in the upper layer of the mixing cup into the turbulence below the mouth of the mixing cup to prevent the slurry from overflowing.

The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, purposes and advantages of this application will become apparent from the description, drawings and claims.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments or exemplary technologies of the present application, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or exemplary technologies. Obviously, the accompanying drawings in the following description are merely These are some embodiments of the present application. For those of ordinary skill in the art, without creative work, the drawings of other embodiments can also be obtained based on these drawings.

FIG. 1 is a schematic structural diagram of a split food processor according to an embodiment of the application;

Fig. 2 is a schematic structural diagram of an integrated food processor according to an embodiment of the application;

3 is a schematic diagram of the structure of the mixing cup according to an embodiment of the application;

4 is a schematic diagram of the assembly of the crushing knife, cutter head, and sleeve according to an embodiment of the application;

Figure 5 is a partial enlarged view of A1 referred to in Figure 4;

Fig. 6 is a schematic diagram of the structure of the shaft sleeve according to an embodiment of the application;

FIG. 7 is a schematic diagram of the structure of the shaft sleeve according to an embodiment of the application;

FIG. 8 is a schematic diagram of the structure of the mixing cup according to an embodiment of the application;

9 is a cross-sectional view of the noise reduction cover according to an embodiment of the application;

10 is a cross-sectional view of the noise reduction cover according to an embodiment of the application;

FIG. 11 is a schematic structural diagram of a top cover of a noise reduction cover according to an embodiment of the application;

12 is a cross-sectional view of the noise reduction cover according to an embodiment of the application;

FIG. 13 is a schematic flowchart of a processing method of a food processor according to an embodiment of the application;

14 is a schematic diagram of the rotating speed of the crushing knife of the processing method of the food processor according to an embodiment of the application;

FIG. 15 is a schematic diagram of the rotating speed of the crushing knife in the processing method of the food processor according to an embodiment of the application.

Description of reference signs:

1. Host, 2. Mixing cup, 21, Cup body, 22, Cup lid, 221, Feeding channel, 222, Anti-overflow electrode, 23, Cup holder, 24, Crushing cavity, 25, Crushing knife, 251, Knife wings, 252, knife shaft, 26, mounting hole, 3, shaft sleeve, 31, rigid inner wall, 311, upper positioning ring, 312, hanging rubber ribs, 313, hanging glue hole, 32, rigid outer wall, 33, elastic layer, 331, Elastic ring, 3311, accommodating cavity, 332, sealing ribs, 333, support, 4, cutter head, 41, heating tube, 5, noise reduction cover, 51, diffusion cavity, 511, vent, 52, grip , 53, Insert part, 531, air inlet, 54, soft rubber sleeve, 55, inner cavity, 56, top cover, 561, diffuse reflection surface, 57, sealing ring, 61, oil seal, 62, isolation gasket, 63 , Ball bearing, 7, wear-resistant layer, 8, motor, 91, discharge port, 92, slurry cup, 93, water tank.

Detailed ways

The application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the embodiments only represent possible changes. Unless clearly required, separate components and functions are optional. In this document, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive In order to make the process and method including a series of elements include not only those elements, but also other elements that are not explicitly listed, in order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the following will be combined The drawings illustrate the embodiments of the application in detail.

This embodiment provides a food processing machine, as shown in Figures 1 and 3, including a main machine 1 and a mixing cup 2. The main machine 1 is provided with a motor 8 and a control board (not shown in the drawings), and the mixing cup 2 is provided with There is a pulverizing knife 25. The motor 8 drives the pulverizing knife 25 to rotate. The mixing cup 2 includes a cup body 21 and a cup lid 22 covering the cup body 21. The mixing cup 2 also includes a cup holder 23, which is arranged on the cup body 21. At the bottom, and between the bottom of the cup body 21 and the cup holder 23, a cutter head 4 is provided. A heating tube 41 is provided on the outside of the cutter head 4. The cup cover 22, the cup body 21 and the cutter head 4 are enclosed to form a crushing cavity 24. The pulverizing knife 25 includes a knife wing 251 and a knife shaft 252. The bottom of the mixing cup 2 is provided with a mounting hole 26 for mounting the shaft sleeve 3.

It can be understood that, as shown in FIG. 2, the main body 1 and the mixing cup 2 of the food processing machine can be an integrated solution, and the food processing machine further includes a discharge port 91 opened on the cup body 21, a slurry receiving cup 92 and a water tank 93.

In order to ensure the concentricity of the cutter shaft 252 and the shaft sleeve 3, as shown in Figs. 3, 4, and 5, the shaft sleeve 3 includes a rigid inner wall 31 for surrounding the cutter shaft 252 to limit the position of the cutter shaft 252, and a mounting hole 26 mating rigid outer wall 32 and elastic layer 33 separating the rigid inner wall 31 and the rigid outer wall 32.

In order to isolate the transmission of noise, in the solution of the present application, the elastic layer 33 is provided with an elastic ring 331 for wrapping the top of the rigid inner wall 31 from the upper side. When the food processing machine is working, the elastic ring 331 wraps the rigid inner wall 31 from the upper side. At the top, the vibration generated by the knife shaft 252 and the rigid inner wall 31 needs to pass through the elastic ring 331 before it can be transmitted into the mixing cup 2. The elastic ring 331 used in this solution has an elastic effect and can absorb vibration. Therefore, When the knife shaft 252 and the rigid inner wall 31 directly collide or indirectly collide with the noise of the product to transmit to the mixing cup 2, the elastic ring 331 can effectively isolate the noise from the path of the mixing cup 2, thereby reducing food processing. The noise inside the mixer bowl 2 has the effect of absorbing vibration and noise.

The distance b that the elastic layer 33 wraps the cutter shaft 252 along the axial direction of the cutter shaft 252 is 0.2mm≤b≤10mm. By selecting a suitable distance between the elastic layer 33 and the cutter shaft 252 in the axial direction, the tool shaft 252 can be guaranteed. The isolation of the noise of the product directly or indirectly colliding with the rigid inner wall 31 can also prevent the elastic layer 33 from being wrapped in an axial direction along the cutter shaft 252 from too small an isolation effect.

In some embodiments, in order to further improve the wrapping effect on the top of the rigid inner wall 31, as shown in FIG. 5, the rigid inner wall 31 includes an upper positioning ring 311, and the upper positioning ring 311 is inserted into the elastic ring 331 to align the cutter shaft 252. To limit the position, by inserting the upper positioning ring 311 into the elastic ring 331, the elastic ring 331 realizes the all-round wrapping of the top of the rigid inner wall 31 up, down and around, that is, the all-round wrapping of the upper positioning ring 311. When the vibration generated between the shaft 252 and the rigid inner wall 31 is transmitted to the mixing cup 2, by wrapping the upper positioning ring 311 in all directions, all directions of noise transmission are isolated, and the transmission of noise is better isolated.

In addition, by inserting the upper positioning ring 311 into the elastic ring 331, the structural strength of the elastic ring 331 can be effectively improved. When the food processing machine is working, the knife shaft 252 vibrates and contacts the elastic ring 331, because the elastic ring 331 is provided with an upper positioning ring 311. The knife shaft 252 compresses the elastic ring 331 in a small range. On the one hand, the elastic ring 331 can ensure that the knife shaft 252 does not deviate too much from the axis of the knife shaft 252, and on the other hand, it can reduce the vibration of the knife shaft 252 and reduce The effect of noise.

Further, in order to better limit the position of the tool shaft 252, the plane where the upper positioning ring 311 is located is perpendicular to the axial direction of the tool shaft 252. When the tool shaft 252 vibrates, because the upper positioning ring 311 contacts the tool shaft 252 through the elastic ring 331, The upper positioning ring 311 can effectively play a supporting role, can better reduce the vibration amplitude of the cutter shaft 252, and reduce noise from the source of noise.

In order to better prevent the noise generated by the vibration of the knife shaft 252 in the sleeve 3 from being transmitted to the mixing cup 2, the elastic ring 331 in this solution annularly wraps the knife shaft 252, and the noise generated by the vibration of the knife shaft 252 in the sleeve 3 is directed to the stirring cup 2. The transmission path of the cup 2 is sealed or the gap of the transmission path is reduced.

Specifically, the elastic ring 331 and the cutter shaft 252 are in clearance fit or sealed fit.

In some embodiments, in order to strengthen the seal between the shaft sleeve 3 and the bottom of the mixing cup 2 and reduce noise, the bottom of the mixing cup 2 is provided with a cutter disk 4, and the mounting hole 26 is opened on the cutter disk 4, in order to seal the cutter disk 4, such as As shown in FIG. 5, the elastic layer 33 is provided with a sealing rib 332 that cooperates with the cutter head 4. In this solution, by providing the sealing rib 332, when the sleeve 3 is pressed into the cutter head 4, the sealing rib 332 can be matched with the opening of the cutter head 4 , That is, the sealing rib 332 cooperates with the cutter head 4 at the mounting hole 26, which can achieve the effect of sealing the opening of the cutter head 4.

In addition, the opening of the cutter head 4 and the sealing rib 332 are matched to be in contact with a hard material and a flexible material, and the sealing rib 332 also plays a role of damping and absorbing vibration on the sleeve 3.

Further, in order to simplify the manufacturing process of the elastic layer 33, the sealing rib 332 is formed by the elastic ring 331 extending in the opposite direction. The sealing rib 332 and the elastic ring 331 adopt an integrated solution at a similar vertical height, which improves the strength of the accessory. , The elastic layer 33 includes an elastic ring 331 and a sealing rib 332, which reduces too many small parts in the sleeve 3 and avoids the difficulty of installing the sleeve 3 and the cutter head 4.

Specifically, the upper surface of the elastic ring 331 protrudes from the upper surface where the cutter head 4 and the sealing rib 332 fit together. With this arrangement, when the food processing machine is working, the knife wing 251 is prone to vibration due to high-speed rotation, and there is a certain swing range up and down. By protruding the upper surface of the elastic ring 331 from the upper surface where the cutter head 4 and the sealing rib 332 fit, when the blade 251 vibrates, the lower surface of the blade 251 will first touch the flexible elastic ring 331. The support function of the elastic ring 331 reduces the swing amplitude of the blade 251 and reduces the noise caused by the swing of the blade 251; on the other hand, the upper surface of the elastic ring 331 protrudes from the cutter head 4 and the sealing rib 332 is arranged to prevent the blade The wing 251 touches the cutter head 4 when it swings to avoid hard contact with the cutter head 4 when the blade 251 rotates at a high speed.

Preferably, the height of the upper surface of the elastic ring 331 protruding from the fitting position of the cutter head 4 and the sealing rib 332 is d2, 0.5mm≤d2≤5mm.

In some embodiments, the elastic layer 33 is a silicone ring. The silicone ring is integrally molded between the rigid inner wall 31 and the rigid outer wall 32. The rigid inner wall 31 and the rigid outer wall 32 are connected and positioned by a silicone ring. The inner wall 31 and the rigid outer wall 32 can improve the concentricity of the rigid inner wall 31 and the rigid outer wall 32 to ensure that the rigid inner wall 31 and the rigid outer wall 32 are arranged concentrically. The concentrically arranged rigid inner wall 31 and the rigid outer wall 32 can ensure the installation hole 26 and the cutter shaft 252 Or the concentricity between the bearings ensures that the output shaft of the motor 8 and the cutter shaft 252 are coaxially arranged, effectively reducing the wear between the cutter shaft 252 and the rigid inner wall 31 or the silicone ring.

In order to ensure the effect of noise reduction and concentric correction of the elastic layer 33, the thickness of the elastic layer 33 is d1, 0.8mm≤d1≤5mm, and the elastic layer 33 has the effect of slowing down the vibration of the food processing machine, and the knife shaft 252 of the crushing knife 25 and the motor 8 When the axis is out of concentricity, it can automatically correct the out-of-concentricity effect. The noise insulation and noise absorption effect of the elastic layer 33 is related to the thickness d1 of the elastic layer 33. In theory, the thicker the better. On a food processing machine, considering space constraints, in this application, 0.8 mm≤d1≤5mm.

In order to ensure the fixing of the rigid inner wall 31, the rigid outer wall 32 and the elastic layer 33, a fixing structure can be provided on the rigid inner wall 31 and the rigid outer wall 32. As shown in FIG. 6, the rigid inner wall 31 is provided with a glue hanging rib 312 and a glue hanging hole 313.

The rigid inner wall 31 may be provided with parts for cooperating with the rigid inner wall 31 and the cutter shaft 252. As shown in FIG. 5, the rigid inner wall 31 is provided with an oil seal 61, a spacer 62, and a ball bearing 63. Before the ball bearing 63 is pressed into the sleeve 3, a layer of adhesive glue is also applied to the outer ring of the ball bearing 63. The purpose of the adhesive glue is to prevent the parts from being fixed due to processing errors, high temperature deformation, cold and heat shrinkage, etc. Loose.

In some embodiments, as shown in FIG. 3, FIG. 4 and FIG. 5, in order to reduce the noise generated by the swing of the blade 251, the elastic ring 331 is convexly provided with a support 333 supporting the root of the blade 251, and the support 333 It is used to limit the swing amplitude of the crushing knife 25 when it rotates. When the food processing machine is working, the knife wing 251 is prone to vibration due to high-speed rotation, and there is a certain swing range up and down. By setting the support 333 under the root of the knife wing 251, when the knife wing 251 has a certain swing range up and down, the knife wing 251 The lower side of the root will first hit the support 333 and produce a downward pressing force on the support 333. Similarly, the support 333 will generate an upward pushing force on the root of the blade 251, which can be reduced by the cushioning effect of the support 333. The swing range of the blade 251.

Specifically, as shown in FIG. 5, the gap between the supporting member 333 and the lower side of the root of the blade 251 is a, a≤2mm. When the swing amplitude of the blade 251 is small, the noise generated by the swing of the blade 251 is small, and the noise reduction demand is weak. In this case, the upper side of the support member 333 and the lower side of the root of the blade 251 are provided with The clearance prevents the blade 251 from compressing the support 333 when the swing amplitude is small, thereby reducing the wear of the blade 251 on the support 333.

In order to better ensure the supporting effect of the supporting member 333 on the blade 251, both the strength of the supporting structure of the supporting member 333 and the vibration damping effect of the supporting member 333 must be considered. In order to ensure the structural strength supported by the supporting member 333, the cross-section of the supporting member 333 is set as a structure with a small upper part and a larger lower part in this application.

As shown in FIG. 5, the cross section of the supporting member 333 is in the shape of a horn with an upward opening.

In some embodiments, as shown in FIG. 7, a wear-resistant layer 7 is provided on the mating surface of the supporting member 333 and the lower side wall of the root of the blade 251. By providing the wear-resistant layer 7 on the supporting member 333, the wear resistance of the surface of the supporting member 333 is enhanced, so as to prolong the friction life of the supporting member 333. It is understandable that there are many ways to arrange the wear-resistant layer 7. A layer of wear-resistant paint can be sprayed on the surface of the support 333, or a layer of wear-resistant material can be attached to the surface of the support 333.

It can be understood that the cross section of the support member 333 may be in the shape of a "eight", that is, the opening of the circular side wall is small in the upper part and larger in the lower part.

It can be understood that the cross section of the supporting member 333 is an isosceles triangle, that is, the center of the bottom of the annular side wall and the center of the top are on the same vertical line.

In some embodiments, as shown in FIG. 7, the rigid inner wall 31 includes an upper positioning ring 311. The lower side of the elastic ring 331 is recessed upwardly with an accommodation cavity 3311 for accommodating the upper positioning ring 311. The elastic ring 331 is opposed to the rigid inner wall 31. The top part is wrapped from the upper side and all around, that is, the upper positioning ring 311 is wrapped from the upper side and all around. When the vibration generated between the knife shaft 252 and the rigid inner wall 31 is transmitted to the mixing cup 2, the upper side and surroundings of the upper positioning ring 311 are wrapped to realize the isolation of the noise from being transmitted upward and to the surrounding, and the transmission of noise is better isolated. . The upper positioning ring 311 is arranged in the accommodating cavity 3311, which can effectively improve the structural strength of the elastic ring 331. When the food processing machine is working, the knife shaft 252 vibrates and contacts the elastic ring 331, because the upper positioning ring 311 is arranged on the elastic ring 331. In the accommodating cavity 3311, the knife shaft 252 can compress the elastic ring 331 in a small range. On the one hand, the elastic ring 331 can ensure that the knife shaft 252 does not deviate too much from the axis of the knife shaft 252, and on the other hand, it can weaken the knife shaft 252. The vibration, which has the effect of reducing noise.

In some embodiments, as shown in FIGS. 8 and 9, the cup cover 22 is provided with an opening, the opening extends downward to form a feeding channel 221, and a noise reduction cover 5 is provided at the feeding channel 221. The noise reduction cover 5 includes a holding part 52 and an insertion part 53, the insertion part 53 is inserted into the feeding channel 221, and a soft rubber sleeve 54 is sheathed on the outside of the insertion part 53. The soft rubber sleeve 54 is specifically a silicone sleeve. After the noise reduction cover 5 is inserted in place, the soft rubber sleeve 54 and the inner side wall of the feeding channel 221 are interference fit to prevent heat and noise from flowing between the noise reduction cover 5 and the feeding channel 221. The matching gap between the two is discharged. In addition, a downwardly extending anti-overflow electrode 222 is provided on the inner surface of the cup lid 22, and the anti-overflow electrode 222 is electrically connected to the control board to monitor the working state of the food processor through the anti-overflow electrode 222, so as to better realize the food Overflow prevention of processing machines.

Existing food processing machines generate a large amount of foam during operation, and too much foam accumulation will cause the failure of the anti-overflow electrode, which in turn leads to the failure of the anti-overflow of the food processing machine. In this embodiment, the noise reduction cover 5 is provided with an inner cavity 55, the bottom wall of the insertion portion 53 is provided with an air inlet 531 connecting the inner cavity 55 and the crushing cavity 24, and an air outlet connecting the outside and the inner cavity 55 is also provided. 511. When the air pressure in the pulverizing cavity 24 increases, the air flow in the pulverizing cavity 24 flows into the inner cavity 55 of the noise reduction cover 5 through the air inlet 531, passes through the inner cavity 55 to reduce noise, and is discharged to the outside through the air outlet 511. Among them, the inner cavity 55 is a hollow structure, which does not block the airflow. The airflow can quickly enter the inner cavity 55 through the air inlet 531 and be discharged from the air outlet 511, thereby quickly releasing the air pressure in the crushing cavity 24 and quickly slowing down the airflow velocity. Reduce the noise generated by the airflow.

The equivalent inner diameter of the air inlet 531 is D1, and the equivalent inner diameter of the inner cavity 55 is D2. In this embodiment, D1/D2=0.15. By controlling the equivalent inner diameter D1 of the air inlet and the equivalent inner diameter D2 of the inner cavity to meet: 0.03≤D1/D2≤0.2, the sound energy in the airflow is quickly released after entering the inner cavity, the amplitude of the sound wave is reduced, and the sound intensity is reduced. And it cancels part of the sound energy reflected by the hollow cavity, so that the noise discharged to the outside with the airflow is weakened, and the effect of noise reduction is realized. When D1/D2 is greater than 0.2, that is, the equivalent inner diameter of the inlet hole is too large or the equivalent inner diameter of the inner cavity is too small, which affects the release of sound energy in the airflow after passing through the inlet hole; if D1/D2 is less than 0.03 , That is, the equivalent inner diameter of the inlet hole is too small or the equivalent inner diameter of the inner cavity is too large, the equivalent inner diameter of the inlet hole is too small, which affects the pressure relief effect of the crushing cavity, and the anti-overflow effect is poor. The equivalent inner diameter of the inner cavity If it is too large, the noise in the airflow after passing through the air inlet has a poor effect of offsetting the reflection in the inner cavity, and it occupies too much space in the mixing cup, resulting in a low utilization rate of the crushing cavity.

As shown in Figures 8 and 9, the noise reduction cover 5 includes an insertion portion 53 inserted into the feeding channel 221 and a holding portion 52 located above the opening. The insertion portion 53 forms an inner cavity 55, and the holding portion 52 forms a diffusion cavity 51. The holding portion 52 extends outward relative to the inserting portion 53, that is, the equivalent inner diameter of the holding portion 52 is larger than the equivalent inner diameter of the inserting portion 53, which facilitates the positioning and taking and placing of the noise reduction cover on the cup lid. The inner cavity is arranged in the insertion part, that is, the inner cavity is inserted into the inside of the cup lid. The noise in the inner cavity is blocked by multiple layers to reduce the noise transmitted to the outside. Moreover, the top of the inner cavity is extended with a diffuser cavity, by setting the inner diameter The sudden change of the diffuser cavity further releases the sound energy in the airflow and improves the effect of noise reduction.

Specifically, as shown in FIG. 9, only one air inlet 531 is provided, and since the side wall of the insertion portion 53 is provided with a soft rubber sleeve 54, the soft rubber sleeve 54 forms an interference fit with the inner side wall of the feeding channel 221 to make Slurry, foam, hot air or noise can only be discharged from the crushing chamber 24 through the air inlet 531. At the same time, the air inlet 531 is arranged at the center of the bottom wall of the insertion part 53, which not only facilitates exhaust, but also ensures smooth exhaust. It also helps to break the bubbles through the airflow to ensure the anti-overflow effect.

It can be understood that there may be multiple air intake holes 531.

The air outlet 511 is provided at the bottom of the diffuser cavity 51 so that the distance between the air outlet 511 and the air inlet 531 is as far as possible, which further extends the sound propagation path, and can better achieve the effect of noise reduction and noise reduction. The noise of the food processing machine is reduced. In another embodiment, the number of air outlet holes 511 is at least two, and the at least two air outlet holes 511 are arranged at equal intervals along the circumferential direction of the diffusion cavity 51. The total area of the at least two air outlet holes 511 is S1, that is, the sum of the areas of the at least two air outlet holes 511 is S1, and the area of the air inlet hole 531 is S2, S1≥S2, so that the air inlet hole The area of 531 is much smaller than the area of the air outlet 511, so that the air pressure in the inner cavity is much smaller than the air pressure in the crushing cavity. In this way, when the foam passes through the air inlet, the air pressure difference formed is larger, which can better squeeze the foam, thereby better avoiding the failure of anti-overflow, better ensuring the anti-overflow effect of the food processor, and preventing the overflow of the slurry , And it is convenient to process and shape the air inlet hole, and it can reduce the noise very well, so as to reduce the noise actually transmitted. Set 1≤S1/S2≤10 in this range. Specifically, S1/S2 is 2, which can defoam and suppress foam well, and can ensure normal exhaust, and it can also achieve a good reduction. The noise effect not only ensures the normal use of the food processor, but also improves the experience of using the food processor.

In order to better reduce the noise during operation of the food processing machine, the air inlet direction of the air inlet hole 531 can be set opposite to the air outlet direction of the air outlet hole 511. Specifically, the air inlet direction of the air inlet hole 531 is upward, and the air outlet hole 511 The outlet direction of the airflow is downward, so that the noise is turned to a certain angle when it is transmitted, that is, the path through which the noise is transmitted is extended, and the blocking and buffering of the noise is increased.

More specifically, the air inlet 531 can be set as a horn hole with a small top and a large bottom, so that the cross-section of the air inlet has a small top and a large bottom, which is convenient for air intake, and not only ensures normal exhaust, but also reduces noise. When it is discharged, it enters from the large hole and exits from the small hole.

The air outlet 511 and the air inlet 531 are staggered in the vertical direction, so that the air outlet 511 and the air inlet 531 are not directly connected, that is, the air outlet 511 does not directly face the air inlet 531. Because the airflow can flow in a circuitous manner under the action of air pressure, and the inner cavity of the noise reduction cover is a hollow structure, even if the air inlet and outlet holes are staggered in the vertical direction, the airflow can be quickly discharged from the air outlet under the action of air pressure. The sound energy in the airflow propagates in a straight line. By staggering the air inlet and outlet holes in the vertical direction, the sound energy will be reflected after being blocked in the propagation direction, and will be transmitted from the air outlet after being subtracted by multiple reflections. , The transmitted noise has been reduced many times to achieve noise reduction.

In order to further achieve the effect of noise reduction and overflow prevention, by controlling the relationship between the equivalent inner diameter of the cup opening and the inner cavity, and combining the relationship between the equivalent inner diameter of the air inlet and the inner cavity, and adjusting according to the equivalent inner diameter of the cup opening The equivalent inner diameter of the cavity and the equivalent inner diameter of the air inlet. Specifically, the equivalent inner diameter of the cup opening is D3, and the equivalent inner diameter of the inner cavity 55 is D2, D2/D3=0.2, by controlling the equivalent inner diameter D3 of the cup opening of the cup body 21 and the equivalent inner diameter D2 of the inner cavity 55 Satisfy: 0.15≤D2/D3≤0.3, so as to adjust the flow rate of airflow from the air inlet hole, and filter out a part of the noise through the air inlet hole, and convert the sound energy frequency sensitive to human ears into other frequencies through the air inlet hole. So that the human ears do not sound harsh.

As shown in Figure 9, the noise reduction cover 5 is a detachable structure, which is convenient for cleaning of the noise reduction cover 5, and the noise reduction cover 5 includes a body and a top cover 56. A sealing ring 57 is arranged between the body and the top cover 56 to ensure the internal The airtightness of the cavity 55 can better ensure the air pressure difference between the inner cavity 55 and the crushing cavity to ensure the bubble breaking effect.

It is understandable that the noise reduction cover may not be provided with a diffusion cavity, but only a cylindrical inner cavity.

It is understandable that the noise reduction cover may be provided with a handshake part of other structure, for example, a handle is provided on the top of the noise reduction cover or a handshake part is formed on the top cover of the noise reduction cover.

It is understandable that the mixing cup can have the cup body and the cutter head in an integrated structure.

It is understandable that the air inlet hole may also be a stepped hole with a small upper portion and a larger lower portion.

In some embodiments, as shown in FIG. 10, the insertion portion 53 includes a bottom wall and a side wall, and the air inlet hole 531 is provided near the connection between the bottom wall and the side wall of the insertion portion 53, so that the airflow is difficult to form at the air inlet hole. Bubbles, where the contact between the bubble and the cavity is multi-faceted, makes the direction of the surface tension of the bubble different, so the bubble is difficult to form, that is, it is easier to break the bubble.

In some embodiments, as shown in FIG. 11, the inner surface of the top cover of the noise reduction cover is provided with a diffuse reflection surface 561, and the diffuse reflection surface 561 is provided with multiple rings and the rings are arranged in a nested manner, that is, multiple concentric circles are combined to form Sound diffuse reflection surface, so that when the sound spreads to the diffuse reflection surface, the sound waves reflected by different circles will interfere with each other to eliminate noise, so as to achieve a good noise reduction effect.

It can be understood that the diffuse reflection surface 561 is a multi-fusiform surface.

In some embodiments, as shown in FIG. 12, the noise reduction cover 5 includes an inner cavity 55 inside the insertion portion 53 and a diffusion cavity 51 above the inner cavity 55, and the air outlet 511 is provided at the edge of the top of the diffusion cavity 51. Specifically, the noise reduction cover 5 includes a body and a top cover 56, the air outlet 511 is provided at the edge of the top cover 56 located outside the insertion portion 53, and the air inlet 531 is provided at the bottom of the insertion portion 53 on the side away from the air outlet 511. At the edge of the wall, the staggered arrangement of the air inlet and the air outlet is realized to avoid the rapid transmission of noise through the air outlet. The noise is reflected by the diffuser cavity and the inner cavity to reduce the sound energy, thereby achieving the effect of noise reduction.

The above-mentioned food processor can be used to process legumes to make soy milk.

In some embodiments, a material processing method for a food processor is also provided, which is executed by the above food processor. As shown in FIG. 13, the above material processing method includes step 101 and step 102. Step 101 is the material ejection phase, and step 102 is the overflow mitigation phase.

In step 101, the increase in the rotating speed of the pulverizing knife 25 per unit time gradually increases so that the slurry forms a turbulent vortex to drive the bottom material of the mixing cup 2 to project.

During the material ejection stage, the speed of the food processor gradually increases per unit time, and the increase of the starting speed gradually increases to make the speed of the food processor gradually increase. On the one hand, it gives users a better user experience and comfort; on the other hand, in the process of food processing machinery, it is good for the slurry to quickly form a turbulence vortex, and it is good for driving the bottom material of the mixing cup 2 to eject, that is, the turbulence vortex. Drive up the material to prevent the material from getting stuck in the seam of the bottom of the cup, avoid the bottom of the cup, and improve the crushing effect of the material.

In step 102, the increase in the rotation speed of the crushing knife 25 per unit time is gradually reduced, so that the slurry and materials in the upper layer of the mixing cup 2 are drawn into the turbulence vortex below the mouth of the mixing cup 2 to prevent the slurry from overflowing.

In the phase of slowing down the overflow, the increase of the food processor per unit time is gradually reduced, so that the speed of the food processor is gradually stabilized at a high speed, so as to avoid large fluctuations in the speed of the food processor at high speed. On the one hand, the projected materials can be drawn into the turbulence vortex, avoiding the risk of slurry overflow due to excessive speed fluctuations in the high speed state of the food processing machine; on the other hand, it greatly reduces the impact on the shaft and connection of the motor 8 due to speed fluctuations. The impact of the head, connecting rubber sleeve, blade and bearing increases the service life of the whole machine.

The schematic diagram of the speed of the crushing knife 25 is shown in Figure 14. The left side of the dashed line is the material ejection stage, and the increase in the speed of the crushing knife 25 per unit time gradually increases; the right side of the dashed line is the slowing down phase, the speed of the crushing knife 25 increases per unit time The amount gradually decreases.

In another embodiment, between the material ejection phase and the overflow mitigation phase, the material processing method further includes a transition phase: the speed of the crushing knife 25 increases within a preset range per unit time, so that the speed of the crushing knife 25 is increased. Transition from the first rotation speed at the end of the material ejection phase to the second rotation speed at the beginning of the slow overflow phase.

In the transition phase, by limiting the increase in the speed of the crushing knife 25 per unit time, it can be ensured that the speed of the crushing knife 25 smoothly transitions from the first speed at the end of the material ejection phase to the second speed at the beginning of the overflow slowing phase, so that the food The processing machine has a transitional effect during high-speed crushing.

In the material processing method, the schematic diagram of the speed of the crushing knife 25 is shown in Figure 15. The left side of the broken line 1 is the material ejection stage, and the increase of the speed of the crushing knife 25 per unit time gradually increases; the middle of the broken line 1 and the broken line 2 is the transition stage , The increase of the speed of the crushing knife 25 per unit time is within the preset range; the right side of the dashed line 2 is the slowing down phase, the increase of the speed of the crushing knife 25 per unit time is gradually reduced.

Specifically, in order to effectively pulverize the materials that have been ejected, the length of the rotating path of the crushing knife 25 in the material ejection phase is less than the length of the rotating path of the crushing knife 25 in the transition phase, that is, the speed of the food processor is increased during the material ejection phase. The gradual increase in the amount makes the material projected, and further smashes at a faster speed during the transition stage, which enhances the smashing effect.

Specifically, the increase in the speed of the crushing knife 25 per unit time in the transition phase is a fixed value, that is, the transition phase achieves the transition from the first speed at the end of the material ejection phase to the second speed at the beginning of the slow overflow phase through uniform acceleration, and the speed increases The amount is also the same, and the stirring noise gradually increases.

It can be understood that the increase in the rotation speed of the crushing knife 25 per unit time in the transitional phase is a value that changes within a preset range.

It can be understood that the increase in the rotation speed of the crushing knife 25 per unit time in the material ejection stage can conform to a linear function or a quadratic function.

It can be understood that the increase in the rotation speed of the crushing knife 25 per unit time during the overflow slowing stage may conform to a linear function or a quadratic function.

In another embodiment, during the material ejection stage, the speed of the crushing knife 25 starts to increase from zero. Preferably, the rotating speed of the crushing knife 25 is in a quadratic or tertiary parabolic shape, that is, there is a slow-increasing stage in the material ejection stage. In this stage, the slurry turbulence is gradually formed by the stirring of the bottom crushing knife 25, and the middle and upper layer slurry can be sucked into the vortex. The upper and lower slurries simultaneously form turbulence and agitate the bottom material to inhale the top material, and improve the existing food processing machine because the speed of the crushing knife 25 increases too fast, and there is no effective turbulence at the bottom of the slurry, which causes the crushing knife 25 to empty, and the middle and upper layers of the slurry, A situation where the material cannot form a turbulent flow.

In another embodiment, in the stage where the rotation speed of the crushing knife 25 increases gradually per unit time and/or the stage when the rotation speed of the crushing knife 25 increases gradually per unit time, after the target rotation speed is determined, there are the following two control schemes .

Solution 1: Determine the target speed and acceleration time, calculate the increase per unit time, that is, the acceleration at this stage, and calculate the matching speed of the crushing knife 25 through the integration of the acceleration to the acceleration time.

Scheme 2: The determined target speed and the increase per unit time, that is, the acceleration at this stage, calculate the acceleration time, and calculate the matching speed of the crushing knife 25 through the integration of the acceleration to the acceleration time.

Specifically, the food processor also includes a speed measurement module (not shown in the drawings). After determining the acceleration time and the speed of the crushing knife 25 matching the acceleration time, the processor and the speed measurement module cooperate to control the motor 8 to drive the crushing knife 25 at a specific time. Reach the target speed.

In another embodiment, before the material ejection stage, the material processing method further includes a heating stage, the heating stage: heating the slurry to a preset temperature according to a preset processing power. The turbulence vortex in the material ejection stage sucks the foam generated in the heating stage into the turbulence vortex to reduce the foam.

The food processing machine heats materials and slurry through a heating stage, and heats the slurry to a preset temperature according to a preset processing power, so as to achieve the purpose of increasing the temperature of the slurry and softening or curing the material. During the heating process, different materials are processed in different ways, especially grains and beans. When heating, some foam will be generated. The turbulence vortex in the material ejection stage can suck the foam generated in the heating stage into the turbulence vortex to reduce foam. Effect.

In another embodiment, after the overflow slowing stage, the material processing method further includes a constant-speed crushing stage, and a constant-speed crushing stage: the crushing knife 25 is controlled to crush the material at a constant speed at the end of the overflow slowing stage.

In the constant-speed crushing stage, the crushing knife 25 runs at a constant speed at the speed at the end of the slow-down overflow stage, so that the motor 8 can operate reliably under load, and the cooking effect is improved.

It should be noted that the limitation of each step involved in this plan is not deemed to be a limitation on the sequence of steps without affecting the implementation of the specific plan. The steps written in the front can be executed first. It can also be executed later or even at the same time. As long as the solution can be implemented, it should be regarded as belonging to the protection scope of this application.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

A food processor, including:

A mixing cup, a motor, and a pulverizing knife driven by the motor;

Wherein, the crushing knife includes a knife wing and a knife shaft, the bottom of the mixing cup is provided with a mounting hole for installing a shaft sleeve, and the knife shaft passes through the shaft sleeve to cooperate with the motor shaft of the motor. A rigid inner wall surrounding the cutter shaft to limit the cutter shaft, a rigid outer wall cooperating with the mounting hole, and an elastic layer separating the rigid inner wall and the rigid outer wall, the elastic layer including a layer for wrapping from the upper side An elastic ring at the top of the rigid inner wall.
The food processor of claim 1, wherein the rigid inner wall includes an upper positioning ring, and the upper positioning ring is inserted into the elastic ring to limit the position of the knife shaft.
3. The food processor of claim 2, wherein the plane where the upper positioning ring is located is perpendicular to the axial direction of the knife shaft.
The food processing machine according to claim 1, wherein the rigid inner wall includes an upper positioning ring, the lower side of the elastic ring is recessed upwardly with a accommodating cavity for accommodating the upper positioning ring, and the elastic ring wraps the upper positioning ring. A knife shaft, the elastic ring and the knife shaft are in clearance fit or sealed fit.
The food processor of claim 1, wherein the bottom of the mixing cup is provided with a cutter head, the mounting hole is provided on the cutter head, and the elastic layer is provided with a sealing rib that cooperates with the cutter head, The sealing rib is formed by the elastic ring extending in the opposite direction, and the upper surface of the elastic ring protrudes from the upper surface where the cutter head and the sealing rib are matched.
The food processing machine according to claim 1, wherein the elastic ring is upwardly protrudingly provided with a support member for supporting the root of the knife wing, and the support member is used to limit the swing amplitude of the crushing knife when it rotates, and the support The gap between the blade and the underside of the blade root is a, a≤2mm.
8. The food processor of claim 1, wherein the elastic layer is a silicone ring, and the silicone ring is integrally molded between the rigid inner wall and the rigid outer wall.
The food processor according to claim 1, wherein the stirring cup includes a cup body and a cup lid that is closed on the top of the cup body, the cup lid and the cup body are enclosed to form a crushing cavity, the cup lid is provided with an opening, and the opening is provided A noise reduction cover with a hollow cavity, the noise reduction cover is sealed with the opening, and the noise reduction cover is provided with an air inlet connecting the inner cavity and the crushing cavity and an air outlet connecting the inner cavity and the outside , The equivalent inner diameter of the air inlet hole is D1, and the equivalent inner diameter of the inner cavity is D2, 0.03≤D1/D2≤0.2.
8. The food processor according to claim 8, wherein the air inlet hole and the air outlet hole are staggered in a vertical direction, and a diffuse reflection surface is provided on the top of the inner cavity.
The food processor according to claim 8, wherein the equivalent inner diameter of the cup mouth of the cup body is D3, 0.15≤D2/D3≤0.3; the total area of the air outlet is S1, and the air inlet The total area is S2, S1≥S2.
The food processing machine according to claim 8, wherein the top of the inner cavity extends outward to form a diffusion cavity, the height of the diffusion cavity is smaller than the height of the inner cavity, and the air outlet is provided in the diffusion cavity The bottom or the top edge of the diffusion cavity.
A material processing method applied to the food processing machine according to any one of claims 1 to 11, including a material throwing stage and an overflow mitigation stage; wherein

The material ejection stage includes: the increase of the rotating speed of the crushing knife per unit time gradually increases, so that the slurry forms a turbulent vortex, so as to drive the material at the bottom of the mixing cup to eject;

The overflow mitigation stage includes: the increase of the rotating speed of the pulverizing blade per unit time is gradually reduced, so that the slurry and material in the upper layer of the mixing cup are drawn into the turbulence vortex below the mouth of the mixing cup, so that the slurry does not overflow.
The material processing method according to claim 12, wherein between the material ejection phase and the overflow mitigation phase, the material processing method further comprises:

The transition phase includes: the increase in the speed of the crushing knife per unit time is within a preset range, so that the speed of the crushing knife transitions from the first speed at the end of the material ejection phase to the second speed at the beginning of the slow overflow phase, and the unit Within a period of time, the length of the rotation path of the pulverizing knife in the material ejection phase is less than the length of the rotation path of the pulverizing knife in the transition phase.
The material processing method according to claim 12, wherein before the material ejection stage, the material processing method further comprises:

Heating stage: heating the slurry to a preset temperature according to a preset processing power; the turbulence vortex in the material ejection stage sucks the foam generated in the heating stage into the turbulence vortex to reduce the foam.
The material processing method according to claim 12, wherein after the overflow mitigation stage, the material processing method further comprises:

The constant-speed crushing stage includes: controlling the crushing knife to crush the material at a constant speed with the rotating speed at the end of the overflow slowing stage.