WO2013162124A1

WO2013162124A1 - Mill for food materials

Info

Publication number: WO2013162124A1
Application number: PCT/KR2012/005486
Authority: WO
Inventors: 이현유; 정진웅; 권기현; 박종대; 금준석; 조진호
Original assignee: 한국식품연구원
Priority date: 2012-04-24
Filing date: 2012-07-11
Publication date: 2013-10-31
Also published as: CN104271245B; KR101364955B1; CN104271245A; KR20130119789A

Abstract

The present invention relates to a mill for food materials. The food mill for food material according to the present invention comprises: a housing having a inlet port for feeding in food materials and an outlet port for discharging the ground food materials; a pair of impellers having a central portion and a plurality of blade portions extending radially outwardly from the center portion such that the blade portions are spaced apart from each other, the pair of impellers being installed inside the housing; and a pair of driving bodies for driving the pair of impellers, respectively. The blade portions include vortex sides having recessed grooves, and the pair of impellers is arranged such that the vortex sides of the blade portions are opposite each other. The mill for food materials of the present invention grinds food materials by means of the mutual collision among the food materials and the collision between the food materials and the air during grinding, thus preventing foreign substances from being mixed with the unground food materials. The mill for food materials of the present invention can be used for dry or wet food materials, and may indirectly grind food materials by the operation of the mill rather than by direct grinding, thus maintaining the quality of the food materials. The mill for food materials of the present invention may include an impeller having a shape capable of forming a section in which the velocity is higher than the rotational speed of the impeller, thus enabling the food materials to be finely ground into uniform particles. Further, the mill for food materials of the present invention may maintain a low-temperature state during operation, thereby preventing the food materials from becoming spoiled due to high temperatures.

Description

Food Raw Material Grinder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food raw material grinder, and more particularly to a food raw material grinder capable of finely grinding food raw materials into uniform particles while maintaining the quality of dry and wet food raw materials.

Commonly used food raw material grinder is used to grind grains by using a grinding blade, and most of them do not grind to the required particle size through one grinding process. It was repeatedly supplied and ground to a desired particle size. Therefore, there is a problem that not only takes a lot of work time according to the manual grinding process but also decreases the work efficiency. Therefore, in order to solve this problem, the number of pulverized food ingredients is increased several times by automatically supplying a pulverized product in one grain crusher instead of a worker's hand. However, when the pulverized material is passed through the food raw material pulverizer using a pulverized blade as described above, the pulverized blade powder is mixed with the pulverized material due to friction between the pulverized blades, thereby obtaining a pure food pulverized product. In addition, since the quality of the food raw material is degraded directly by the grinding blade, if the grinding blade becomes dull after a certain period of time, the time taken to grind the food raw material to the desired particle size increases, and if heat is generated during the grinding process, In the case of cereals, the problem of gelatinization occurs.

Therefore, in recent years, the necessity of a food raw material grinder capable of preventing the mixing of impurities in the process of crushing the food raw materials, minimizing heat generation while maintaining the quality of the food raw materials, and crushing the food raw materials with a uniform particle size is required. Soybeans.

The problem to be solved by the present invention is to provide a food raw material grinder capable of finely grinding the food raw material into uniform particles while maintaining the quality of dry and wet food raw materials.

The present invention, in order to solve the above problems, a housing including a feed port into which the food material is input and the discharge port is discharged unpulverized food raw material;

A pair of impellers extending in a radially outward direction from the center and including a plurality of wings and installed in the housing; And

Including; a pair of driving bodies for driving the pair of impellers respectively;

The wing portion is formed with a vortex surface formed with a concave groove,

The pair of impellers provide a food material grinder installed to face the vortex surface formed on each of the impellers.

According to one embodiment of the invention, it is preferable that the groove is circular in front shape.

In addition, it is preferable that the pair of impellers have the same shape.

In addition, the driving body is a motor,

Preferably, the motor and the impeller are interlocked by a rod-shaped rotating shaft beam.

In addition, it is preferable that the separation interval between the pair of impeller by the rotating shaft beam is adjusted.

In addition, the wing is formed on the rear surface opposite the vortex surface,

The rear surface is preferably formed to protrude more convexly than the central portion.

In addition, the wing portion is preferably formed so that the vortex surface protrudes more convex than the central portion.

In addition, the plurality of wings is preferably any one of four blades, six blades, and eight blades.

According to the present invention, by pulverizing the food material by the collision between the food raw materials and the collision of the food raw materials and the air during the grinding process, it is possible to prevent the mixing of foreign matters in the pulverized food raw material, dry and wet food raw materials Not only is applied to, but also indirectly pulverized by the operation of the pulverizer, not directly pulverized by the pulverizer can maintain the quality of the food raw materials. In addition, by forming a multi-tornado by the shape of the impeller, it is possible to prevent the food material from being caught in one position of the device, and finely pulverized into uniform particles. In addition, since the low temperature state can be maintained even when the food raw material grinder is driven, it is possible to prevent the food raw material from being deteriorated by temperature.

1 is a schematic diagram of a food raw material mill according to an embodiment of the present invention.

2 is a perspective view and a cross-sectional view of an impeller according to an embodiment of the present invention.

3 is a photograph of a cyclone mill and an impeller used in Examples and Comparative Examples.

4 is an enlarged photograph of non-glutinous rice flour powder prepared according to Example 1 and Comparative Example 1;

5 is a graph of grain size of non-glutinous rice prepared by Example and Comparative Example 1. FIG.

As shown in FIG. 1, the food raw material grinder according to the present invention includes: a housing 110 including a supply port 112 into which a food material is input and an outlet 114 from which unpulverized food material is discharged;

A pair of impellers 120 formed in the housing 110 and including a plurality of wing portions 124 extending from the center portion 122 and spaced apart from each other in the radially outward direction; And

Including; a pair of driving bodies for driving the pair of impellers 120, respectively,

The wing portion 124 is formed with a vortex surface 124a having a concave groove 124c formed therein,

The pair of impellers 120 are installed to face the vortex surfaces 124a formed in the respective impellers 120.

Hereinafter, the present invention will be described in more detail with reference to preferred examples. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited thereby.

Mills can be classified into roll mills, millstone mills, air mills, cyclone mills, high-speed mills and the like according to the driving method thereof. Among them, the cyclone mill is suitable for producing fine particle powder, miniaturizing machinery, and suitable for mass production as well as small amount. The particle size of the powder can be controlled by rotation speed or wind speed and can be dried simultaneously with grinding. Stable food processing requires fine and uniform fine powder. Therefore, the finely ground fine flour is not only fine and uneven, but also leaves much starch on the surface of the fine powder. That is, starch damage glass is low, and the processing suitability to a product becomes excellent. Since the cyclone mill is a self-pulverizing method in which the pulverized materials collide with each other, the pulverized blade or the like can be prevented from being mixed with the pulverized powder. In addition, the amount of air generated and the temperature rise is small, it is possible to prevent the particles to be gelatinized during the grinding process.

The present invention specifies the shape of the wing portion 124 formed on the vortex surface 124a of the impeller 120, so that the food material is more smoothly crushed by the flow of air generated in the wing portion 124.

1 is a schematic view of a foodstuff grinder according to an embodiment of the present invention, Figure 2 is a front view and a side view of the impeller 120 according to an embodiment of the present invention.

The food raw material introduced into the supply port 112 of the housing 110 flows by the flow of air generated by the rotation of the impeller 120. In this process, crushing occurs due to the shear force generated when the air and the food material collide with each other, or the shear force generated when the food material flowing by the air flow collides with each other. In this process, the food material, which has been pulverized, is discharged to the outlet 114 of the housing 110. Grinding particle size of the food raw material can be adjusted in proportion to the flow rate of the air driven in the housing 110 and the time exposed to the flowing air. That is, the air flow type pulverizer according to the present invention is to control the time or crushing strength of the pulverization process in order to control the particle size because the pulverized particles are evenly pulverized. To this end, the present invention by adjusting the rotational speed of the impeller 120 and the time the impeller 120 is rotationally driven before the food material is input and discharged in order to control the particle size of the food material, thereby controlling the particle size of the food material being crushed It is.

The impeller 120 driven to indirectly grind food ingredients may be divided into a central portion 122 and a wing portion 124 as shown in FIGS. 1 and 2. The center of the center 122, the rotary shaft for driving the impeller 120 is coupled, the wing portion 124 is coupled around the center (122). Here, the wing 124 is a plurality of wing 124 is formed in one central portion 122, according to an embodiment of the present invention, when the central portion 122 rotates, the wing portion 124 is the central portion ( In order to prevent the impeller 120 from being driven in an eccentrically connected state from the 122, the wing parts 124 are formed at equal intervals. That is, the wing 124 extends radially outwardly at a predetermined angle from the center of the central portion 122. In this case, the impeller may be formed of any one of four blades having four wing portions 124, six blades having six wing portions, and eight blades having eight wing portions.

The pair of impellers 120 are rotated in opposite directions with each other by a driving body for driving each of them. That is, since the driving direction of each of the impeller 120 is different, it is provided with a driving body for driving it. In this case, when the driving body is selected as the motor 130, a rod-shaped rotating shaft beam 140 is provided between the impeller 120 and the motor 130 such that the impeller 120 is driven by the driving of the motor 130 or the motor ( The impeller 120 may be directly rotated by being directly linked to the 130. That is, the method of rotating the impeller 120 is not limited to any one, and may be driven by various methods such as a general motor 130 or a device driven by rotation using magnetic force. By forming the vortex surface 124a of the forward rotating impeller 120 and the reverse rotating impeller 120 to face each other, an air flow generating shear force in the food material is generated by the impeller. In addition, shear forces are generated when food materials moving along this airflow collide with each other.

The present invention forms a bend on the vortex surface 124a and the rear surface 124b which are the front face of the shape of the impeller 120, so that the food material can smoothly flow in the housing 110. First, the wing 124 has a rear surface 124b formed on the opposite side of the vortex surface 124a, and the rear surface 124b of the wing portion 124 is formed to protrude more convexly than the central portion 122. By such a feature that the weight of the wing 124 located radially outward from the center of the impeller 120 is increased so that the impeller 120 is driven to rotate uniformly, so that the shear force acts uniformly on the food material. .

In addition, the wing portion 124, the vortex surface (124a) is preferably formed to protrude more than the central portion (122). The pair of impellers 120 are provided to face each other with the vortex surfaces 124a respectively formed on the front surface of the wing portion 124. Therefore, when the vortex surface 124a of the wing portion 124 is convexly formed, if the vortex surface 124a faces each other during the process of the impeller 120 rotating, the vortex surface 124a and the vortex surface ( As a narrow space is formed between 124a), throttling occurs. Therefore, as the wind speed increases instantaneously, the raw material can be smoothly flowed, and the raw material is more smoothly crushed. In addition, by forming the groove 124c in the vortex surface 124a, the vortex is generated in the groove 124c so that the food material is flowed evenly once again while the shear force is applied to the food material.

As such, by forming the back surface 124b and the vortex surface 124a of the wing portion 124, heat generated in the process of crushing the food raw material can be minimized. Therefore, the food material is prevented from being degraded by heat, and the output is increased by multiple tornadoes formed by the friction between the wing 124 and the air, thereby smoothing the air flow inside the housing 110. Time can be minimized.

In addition, since the particle size of the food raw material can be adjusted to be customized, it is not necessary to pulverize the food raw material repeatedly at the same time, thereby reducing energy consumption. In addition, it is possible not only to mix depending on the type of food ingredients to be crushed, but also to mix and grind the wet food ingredients. Conventional foodstuff pulverizers do not form multiple tornadoes, so in the case of wet foodstuffs, the specific gravity is high, so they are frequently sandwiched between the grinding blades or gaps of the apparatus before pulverization. However, the present invention is caused by the multiple tornado generated by the driving of the vortex and the impeller generated in the grooves (124c) to be crushed again to the other food raw materials and air and shear occurs as one more floating. Can be. Therefore, it can be smoothly crushed by the shear force, rather than being pinched by the device or the like.

Here, as another method for adjusting the particle size of the food material to be pulverized, it is possible to adjust the interval between the pair of impeller 120. For example, when the impeller 120 is coupled to each other by the rotating shaft beam 140, by providing a screw structure or a sliding composition, etc. in the rotating shaft beam 140, by adjusting the position of the impeller 120 from the end of the rotating shaft, The distance between the vortex surface 124a of the pair of impellers 120 can be adjusted. Due to this it is possible to adjust the wind speed generated between the impeller 120, thereby adjusting the particle size of the crushed food raw material in a variety of ranges.

As shown in FIG. 2A, the groove 124c formed in the vortex surface 124a of the wing portion 124 is preferably circular in shape, as seen from the front. That is, the food material flowing in the streamlined groove 124c by being concavely formed in a part of a spherical shape and the food material introduced through the fast flow rate in the narrow gap between the vortex surfaces 124a facing each other smoothly with each other. It can be provided to hit.

Here, it is preferable that the pair of impellers 120 have the same shape. That is, when the impeller 120 is rotated in the opposite direction at the position facing each other, the shape of the groove 124c and the radially inner and radially outer side of the groove 124c at the moment when the surface of the wing 124 coincides. By narrowing the narrow gap position of the vortex surface 124a located, the shear force acting on the food material is uniform. Here, the wing 124 is a four-blade shape extending from the central portion 122 in the radially outer four directions, but the number of the wing 124 is not limited thereto, and may be provided in a six-blade or eight-blade. .

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

EXAMPLE

1) device

In the cyclone mill of FIG. 3a, the impeller of FIG. 3b was applied.

2) Input food ingredients

We used non-glutinous rice harvested in Yangpyeong, Gyeonggi-do in 2011, glutinous rice harvested in 2011 in Jincheon, Chungbuk, and brown rice harvested in 2011 in Cheorwon, Gangwon-do.

Comparative Example 1

1) device

In the cyclone mill of FIG. 3a, the impeller of FIG. 3c was applied.

2) Input food ingredients

Same as Example

Comparative Example 2

1) device

In the cyclone mill of FIG. 3a, the impeller of FIG. 3d was applied.

2) Input food ingredients

Same as Example

Experimental Example

Each experiment was performed after driving the raw material grinders of Examples and Comparative Examples under conditions of an impeller speed of 7000 rpm, a blower speed of 2000 rpm, and an input speed of 20 Hz.

1) Measurement of the loss rate (%) and production rate (kg / hr) of the powder

Loss rate was determined by measuring input and output weights. The yield was calculated by measuring the time from input to yield. The calculated values are shown in Table 1 below.

Table 1

According to the results of Table 1, the loss rate of the Example was 0.5% lower than or equal to that of Comparative Example 1 when the grooved impeller was mounted. In addition, compared with Comparative Example 2, the loss rate of the Example was 1% lower or the same. Due to the difference in the loss rate, the Example can produce up to 0.96 kg more per hour than Comparative Examples 1 and 2, and it can be seen that at least 0.6 kg can be produced more per hour.

2) noise

Noise generated when driving the cyclone mills of Examples and Comparative Examples 1 and 2 was measured. The measured values are shown in Table 2 below.

TABLE 2

According to the results of Table 2, it can be seen that the noise generated in the food raw material grinder of the embodiment does not have a large difference when compared with Comparative Example 1 and Comparative Example 2.

3) emission wind speed

The wind speed generated when rotating the impeller at 7000 rpm was measured. The measured values are shown in Table 3 below.

TABLE 3

According to the results of Table 3, in the case of the embodiment, when the impeller rotates, it can be seen that the generated discharge wind speed is not significantly different from Comparative Example 1 and Comparative Example 2.

4) Water absorption index and water dissolution index according to the water content

The moisture content of rice flour was 105 ℃ atmospheric pressure drying method, and 2g of powder was added to the water-filled water dispenser for each treatment, and dried using a dry oven (Korea Integrated Equipment Manufacturer, Korea). After the drying was repeated until the constant amount, the average value was obtained. The water absorption index and the water dissolution index were measured by applying Anderson's method. 40 ml of distilled water was mixed in a 2.5 g sample into a centrifuge tube, left to stand at room temperature for 30 minutes, and then centrifuged at 8000 rpm for 10 minutes. WSI was calculated as a percentage of 2.5 g of the solids obtained by adding the supernatant to a dry water obtained in advance, and WAI was obtained by measuring the weight of the precipitate. Where A is the weight of the sample (g), B is the weight of the dried solids (g), C is the weight of the precipitate (g) WAI is shown in Equation 1, WSI is shown in Equation 2

Equation 1

Equation 2

The measured values of water absorption index and water dissolution index at this time are shown in Table 4.

Table 4

According to the results of Table 4, the food raw material pulverized in the Example was lowered to 0.5 to 2% water content compared to Comparative Example 1 and Comparative Example 2. In addition, in Comparative Examples 1 and 2, both the water absorption index and the water dissolution index vary depending on the moisture content, whereas by using the food raw material grinder according to the embodiment, it is possible to implement a product having a different water dissolution index even in a similar water absorption index. I can see. Therefore, it is possible to select and cook a material corresponding to the required water solubility index in the same water absorption index to be required according to the food to be prepared.

5) Finely divided particle state

Micrographs of non-grinded rice by Example and Comparative Example 1 are shown in FIG. 4. The microscope magnification is 160 times.

According to Figure 4a it can be seen that the non-grinded rice in the embodiment was smoothly ground by the multiple tornado effect. However, according to Figure 4b it can be seen that the non-crushed non-grinded rice, which is added to Comparative Example 1, is not pulverized as shown in the figure, and the particles in the pressed state remain intact. That is, in the embodiment it can be seen that the grinding occurs uniformly.

6) particle size range

Particle size analysis was measured using a particle size analyzer (CILAS 1064, France), and the particle size was observed by classifying the sample according to the grinding equipment and varieties.

5 shows graphs of non-grinded rice by Example and Comparative Example 1. FIG.

According to Figure 5 the finely divided food material particle size range is shown in red. That is, as shown in FIG. 5A, the non-rice milled by the food raw material mill of the embodiment has a width of the particle size of 1 μm to 60 μm, and the difference between the sections is 60. On the other hand, in the case of Comparative Example 1, as shown in FIG. 5B, the interval difference reaches 300 until the width of the particle size reaches 1 μm to 300 μm. In this case, it is difficult to produce a good powder due to the non-uniform particle size, and because the particles of 100㎛ or more in addition to the bimodal graph remains, the process must be performed again through a separate screening process. That is, it can be seen that the finely ground non-milled rice can be obtained in a short time because the grain size is uniformly ground.

Thus, when using a food raw material grinder equipped with an impeller grooved in the vortex as in the present invention, not only can the production be increased in the same quietness and air volume, but also the powder can be produced with an even granularity to produce high quality fine powder to be produced. Can be.

All simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims

A housing including a supply port through which food ingredients are introduced and an outlet through which unpulverized food materials are discharged;

A pair of impellers extending in a radially outward direction from the center and including a plurality of wings and installed in the housing; And

Including; a pair of driving bodies for driving the pair of impellers respectively;

The wing portion is formed with a vortex surface formed with a concave groove,

The pair of impeller is a food raw material mill is installed so that the vortex surface formed in each facing.
The method of claim 1,

The groove is a food material mill, characterized in that the front shape is circular.
The method of claim 1,

The pair of impeller is a food material mill, characterized in that the same shape.
The method of claim 1,

The drive body is a motor,

And the motor and the impeller are interlocked by a rod-shaped rotating shaft beam.
The method of claim 4, wherein

And a separation distance between the pair of impellers is controlled by the rotating shaft beam.
The method of claim 1,

The wing is formed on the rear surface opposite the vortex surface,

The rear surface of the food raw material mill, characterized in that the convex projecting than the central portion.
The method of claim 1,

Wherein the wing is characterized in that the vortex surface protrudes convex than the central portion of the food raw material mill.
The method of claim 1,

Wherein the plurality of blades, characterized in that any one of four blades, six blades, and eight blades.