KR102048123B1 - Sterilization Apparatus and The Operating Method thereof - Google Patents

Abstract

A rotating body having a first surface and a second surface and having a axial rotation, a cover having a hollow corresponding to the rotating body so that the rotating body is inserted and rotated by covering the first surface and the second surface and the first surface And a sterilization flow path formed of a first sterilization flow path between the cover and the second sterilization oil formed between the second surface and the cover. A dimple is formed on the surface of the rotating body, thereby forming a hydraulic cavity phenomenon. It can provide a sterilizer using.

Description

Sterilization apparatus and its operation method {Sterilization Apparatus and The Operating Method}

The present invention relates to a sterilization apparatus, and more particularly, to a sterilization apparatus using hydraulic cavitation.

Heat sterilization is a method of applying heat to sterilize liquid food, which is the most common type of sterilization. The heat sterilization method is known to be easy to manage by supervisory institutions and highly reliable. Such heat sterilization methods include low temperature long time (LTLT), high temperature short time (HTST), and ultra high temperature (UHT).

 In order to sterilize milk, which is a kind of liquid food, ultra high temperature processing (UHT), which is cheaper than other heat sterilization methods, has been widely used. However, with the recent increase in health concerns such as well-being, the issue of UHT destroying milk's nutrients has emerged. Therefore, high-temperature, short-term sterilization (HTST) milk, which is expensive but has little nutrient breakdown, is receiving new attention.

The existing high temperature short time sterilization method (HTST) uses an indirect heating method using a plate heat exchanger between external steam and liquid food. However, in the case of using a plate heat exchanger, there is a lot of corrugation structure inside the plate to promote heat transfer, so that secondary contamination is caused by fouling on the plate surface due to the surface temperature of the heat exchanger. There was.

In order to solve the shortcomings of the conventional high temperature short time sterilization method, a sterilization method using a cavitation is proposed. Cavitation generally refers to the phenomenon of local evaporation at the point where the local absolute pressure drops below the saturated vapor pressure instantaneously when the liquid flows, and thus bubbles are generated or the pressure of the bubbles generated above the saturated vapor pressure. As it recovers, it collapses, which means a series of processes of bubble generation, growth, and extinction. The sterilization method using the cavitation is sterilized using heat and impact generated when the microbubbles generated by the cavity collapse. Conventional methods for generating cavitation through ultrasound have been limited to large capacity. In addition, the conventional method of generating a cavity through an orifice has a limitation in that it is extremely difficult to design freely the type, size, number, length and diameter of the orifice geometry.

United States public US20140202942

One technical problem of the present invention is to provide a sterilization apparatus using hydraulic cavitation.

Another technical problem of the present invention is to provide a sterilization apparatus suitable for large capacity.

Another technical problem of the present invention is to provide a sterilization apparatus for providing easy sterilization condition setting.

Another technical problem of the present invention is to provide a sterilization apparatus for minimizing the generation of secondary contaminants.

The other technical problem of the present invention is not limited by the above-mentioned technical problem, and can be more clearly understood by the following description.

Sterilizing apparatus according to an embodiment of the present invention has a first surface and a second surface and the rotating body to rotate the shaft, by covering the first surface and the second surface and the rotating body to be inserted and rotated and A sterilization flow passage comprising a lid having a corresponding hollow and a first sterilization flow passage between the first face and the lid and a second sterilization flow passage formed between the second face and the lid, dimple) is formed.

The dimple of the sterilizer according to the embodiment of the present invention is characterized in that it is formed on at least one surface of the first surface and the second surface of the rotating body.

The dimple of the sterilizer according to the embodiment of the present invention is characterized in that it is formed in a concave shape on the surface of the rotating body.

The concave shape of the sterilizer dimple according to an embodiment of the present invention is characterized in that the cylinder shape.

Cylinder-shaped dimples according to an embodiment of the present invention is characterized in that it has a depth of 3.0 to 4.5mm.

The concave shape of the sterilizer dimple according to an embodiment of the present invention is characterized in that the cone (cone) shape.

Cone-shaped dimples according to an embodiment of the present invention is characterized by having a central angle of 140 to 160 degrees.

Shape of the dimple according to an embodiment of the present invention is characterized in that hemispherical (sphere) shape.

Dimples according to an embodiment of the present invention is characterized in that arranged in at least two rows in the radial direction of the rotating body.

The dimple of the rotating body according to an embodiment of the present invention is characterized in that it is made to sterilize the fluid introduced into the sterilization flow by using the cavitation generated by the rotation of the rotating body.

In the sterilization apparatus according to an embodiment of the present invention, the first sterilization flow path provides a flow path in the radial direction of the rotating body and the second sterilization flow path provides a flow path in the center direction of the rotating body. do.

The cover according to an embodiment of the present invention further includes a discharge port, wherein the discharge port is formed in the second sterilization flow path, wherein the second sterilization flow path is characterized in that located in the center direction of the rotating body rather than the dimple.

Sterilization method according to an embodiment of the present invention comprises the steps of providing a liquid to be sterilized by the flow path between the dimple formed rotor and the cover covering the rotor; Generating bubbles in the liquid by rotating the rotor; And sterilizing the liquid through the generation and disappearance of the bubbles.

The sterilization method according to an embodiment of the present invention may further include providing water to the flow path and rotating the rotating body before providing the liquid to be sterilized.

Sterilization apparatus according to an embodiment of the present invention can sterilize the liquid food by using the hydraulic cavitation, it can provide the effect of large-capacity sterilization, easy sterilization condition control, secondary pollution minimization.

Other effects of the present invention are not limited by the above effects, and can be more clearly understood by the following description.

1 is a perspective view of a sterilizing apparatus according to an embodiment of the present invention.
Figure 2 shows an exploded view of the sterilization module according to an embodiment of the present invention.
Figure 3 shows an assembly view of the sterilization module according to an embodiment of the present invention.
Figure 4 shows a cross-section of the sterilization module according to an embodiment of the present invention.
5 illustrates various embodiments of a rotating dimple according to an embodiment of the present invention.
6 is a flowchart illustrating a sterilization method according to an embodiment of the present invention.
Figure 7 shows a system of sterilization apparatus according to an embodiment of the present invention.
8 and 9 illustrate numerical analysis results related to the generation of cavitation according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to the exemplary embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete, and that the spirit of the present invention can be sufficiently delivered to those skilled in the art.

In the present specification, when a component is mentioned to be on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical contents.

In addition, in various embodiments of the present specification, terms such as first, second, and third are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. In addition, the term 'and / or' is used herein to include at least one of the components listed before and after.

Singular expressions in the specification include plural expressions unless the context clearly indicates otherwise. In addition, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, element, or combination thereof described in the specification, and one or more other features or numbers, steps, configurations It should not be understood to exclude the possibility of the presence or the addition of elements or combinations thereof. In addition, the term "connection" is used herein to mean both indirectly connecting a plurality of components, and directly connecting.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a perspective view of a sterilizing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the sterilization apparatus 100 according to an embodiment of the present invention may include a motor 110 and a sterilization module 120.

The motor 110 may provide a rotational force (see arrow) to the sterilization module 120 by key coupling with the sterilization module 120 at one side.

The sterilization module 120 may refer to a module providing sterilization power by receiving rotational force from the motor 110. Specifically, the sterilization module 120 may receive a rotational force from the motor 110 to generate a hydraulic cavity phenomenon. Accordingly, the sterilization module 120 may sterilize the fluid using hydraulic cavitation.

For reference, in the sterilization method using hydraulic cavitation, cavitation occurs due to the geometry or rotation of a flow path when a liquid flows. At this time, bubbles of several um or less are generated by the cavitation and the generated bubbles It is a direct sterilization method using the phenomenon that the temperature of the adjacent area rises to about 4000K ~ 5000K while collapsed. More specifically, as the bubbles generated by the cavitation collapse, a high temperature of about 4300K to 4900K is generated together with the shockwave and the microjet, and thus the liquid temperature rises due to the destruction of the fine bubbles. You can apply heat directly. This allows you to sterilize liquid foods for drinking.

Hereinafter, each configuration will be described in detail.

Figure 2 shows an exploded view of the sterilization module according to an embodiment of the present invention, Figure 3 shows an assembly view of the sterilization module according to an embodiment of the present invention.

Referring to FIG. 2, the sterilization module 120 according to an embodiment of the present invention may include a cover 130 and 140 and a rotating body 150.

The covers 130 and 140 may cover the rotating body 150 to provide a rotating space for the rotating body 150 to be inserted and rotated. To this end, the hollow inside the covers 130 and 140 may have a shape corresponding to that of the rotating body 150. For example, when the rotating body 150 has a circular plate shape, the hollow body 150 may have a hollow circular plate shape inside the covers 130 and 140. At this time, the hollow inside the cover (130, 140) may further have a rotation margin to provide a space in which the rotating body 150 rotates.

The covers 130 and 140 may include a first cover 130 covering the rotating body 150 from the front side and a second cover 140 covering the rotating body 150 from the rear side.

As shown in FIG. 3, the first cover 130 may form an inlet 132 for introducing a fluid to be sterilized. In addition, the second cover 140 may include an outlet 144 through which the sterilized fluid is discharged. At this time, the outlet 144 is located in the central direction than the dimple 152 of the rotating body 150.

The rotating body 150 may be made to axially rotate. For example, the rotor 150 may be rotated by being connected to the motor 110 described above. As a result, the rotor 150 may rotate inside the covers 130 and 140.

The rotating body 150 may further include a dimple on one surface of the rotating body 150. The dimple may refer to a shape structure for easier generation of hydraulic cavitation. For example, the dimple may be formed in a concave shape on the surface of the rotating body 150.

More specifically, the rotating body 150 may include a dimple on at least one of a first surface facing the first cover 130 and a second surface facing the second cover 140.

Hereinafter, a sterilization method of a sterilization apparatus according to an embodiment of the present invention will be described with reference to FIG. 4.

Figure 4 shows a cross-section of the sterilization module according to an embodiment of the present invention.

Referring to FIG. 4, the rotor 150 may be provided in a state in which the cover 130 and the cover 140 are inserted.

At this time, the space (d) between the rotating body 150 and the cover (130, 140) is provided as a sterilization flow path. Specifically, the flow path between the front surface of the rotating body 150 and the cover 130 corresponds to the first sterilization flow path (a), and the flow path between the rear surface of the rotating body 150 and the cover 140 is formed. 2 corresponds to the sterilization flow path (c). In addition, the flow path between the side surface of the rotating body 150 and the cover (130, 140) corresponds to the third sterilization flow path (b). Therefore, the fluid to be sterilized is introduced into the inlet 132 and discharged to the outlet 144 via the first, third and second sterilization passages.

Specifically, the sterilization module 120 generates a cavity phenomenon in the fluid to be sterilized through the rotational force of the rotating body 150 and the shape of the dimple 152. Accordingly, the fluid to be sterilized goes through the process of sterilization by the cavitation while passing through the sterilization flow path. In more detail, the fluid to be sterilized is subjected to sterilization while flowing through a first sterilization oil extending in the r direction, a second sterilization oil extending in the z direction, and a third sterilization oil passage extending in the -r direction. The sterilized fluid is then discharged through the outlet 144. At this time, since the outlet 144 is located in the center direction of the rotating body than the dimple 152 of the rotating body can maximize the sterilization path.

5 illustrates various embodiments of a rotating dimple according to an embodiment of the present invention.

As described above, the dimple refers to a structure for generating hydraulic cavitation, and it is necessary to design a shape and an arrangement to maximize the occurrence of hydraulic cavitation.

Referring to FIG. 5 (a), the dimple 152 may have a cone shape. Referring to FIG. 5 (b), the dimple 154 may have a cylinder shape. Referring to), the dimple 156 may have a hemispherical shape. For example, when the dimple has a cone shape, the dimple may have a depth of 3.0 to 4.0 mm and a center angle of 140 to 160 degrees. Also, for example, when the dimple has a cylindrical shape, it may have a depth of 3.0 to 4.5 mm.

In addition, referring to FIG. 5 (d), the rotor 150 may include dimples 152a and 152b formed in at least two rows in the circumferential direction of the rotor 150.

Numerical results of the shape and arrangement of the dimples will be described with reference to the accompanying drawings.

6 shows a flowchart of a sterilization method according to an embodiment of the present invention, and FIG. 7 shows a system of a sterilization device according to an embodiment of the present invention.

Referring to Figure 6, the sterilization method according to an embodiment of the present invention is a preliminary step (S100), providing a liquid to sterilize (S110), sterilizing by using a cavitation according to the rotation of the rotating body (S120) It may be made, including. For convenience of explanation, it is assumed that the liquid to be sterilized is milk.

Step S100 is a preparation step, referring to the direction ① of FIG. 7, water may be provided to the sterilizer from the water tank. At this time, the water may be ultrapure water. If water is provided from the water tank to the sterilizer, the sterilizer may operate to rotate the motor to rotate in a steady-state. Water introduced into the sterilizer is discharged through the outlet and circulated back into the water tank.

S110 is a step of providing a liquid to be sterilized. Referring to the direction ② of FIG. 7, milk to be sterilized is introduced into the sterilizer. That is, the milk to be sterilized is introduced into the sterilization apparatus that has entered the normal state. Therefore, since the cavitation occurs in the milk in the sterilizer, the sterilization process proceeds according to the generation and collapse of milk bubbles. More specifically, the fluid to be sterilized is sterilized by hydrodynamic cavitation caused by the rotation of the rotating body while passing through the inlet 132, the first sterilization flow path, the third sterilization flow path, the second sterilization flow path, and the outlet 144. .

The sterilized milk is collected in the sterilized milk collection tank.

Since the sterilization method according to an embodiment of the present invention uses a direct heating method through a cavity phenomenon, which is a phase change phenomenon of a liquid, there is an advantage that an additional heat exchanger required in the conventional indirect heating method is not required. In addition, in the case of the conventional indirect heating method, there was secondary pollution by heating odor, but the sterilization method according to an embodiment of the present invention is a direct heating method, so that secondary pollution can be minimized and nutrient destruction is minimized.

In addition, the sterilization method according to an embodiment of the present invention can control the sterilization conditions. For example, it is possible to control the flow rate of the fluid, the inflow pressure and the rotational speed of the rotating body. Therefore, the setting of the driving conditions is simpler than the conventional sterilization apparatus using an orifice, and has an advantage in terms of efficiency.

Hereinafter, the numerical analysis results related to the occurrence of cavitation according to an embodiment of the present invention will be described with reference to FIGS. 8 to 10.

8 and 9 illustrate numerical analysis results related to the generation of cavitation according to an embodiment of the present invention.

8 illustrates numerical analysis results related to the occurrence of cavitation when the shape of the dimple is cylindrical. Numerical analyzes were performed for cylinders with depths of 3.0, 3.5, 4.0 and 4.5 mm. Numerical results show that the total volume fraction of vapor (%) is the best when the cylinder depth is 4mm, and the most common cavitation occurs. For reference, the absolute value of Y in FIG. 8 may refer to the distance from the circumferential end of the rotor to the center.

9 illustrates numerical analysis results related to the generation of cavitation when the shape of the dimple is a cone shape. The numerical analysis of FIG. 9 (a) was made for the case of depth 3.0mm, the center angle 140, 150, 160, and the numerical analysis of FIG. 9 (b) was the case of depth 3.5mm, the center angle 140, 150, 160. 9 (c), the numerical analysis was performed for the case of depth 4.0mm, the central angle 150, 160.

When the cone depth is 3.0 and 3.5mm, the volume fraction is excellent at the center angle of 150 degrees, and when the cone depth is 4.0mm, the volume fraction is excellent at the center angle of 160 degrees.

Table 1 below summarizes the numerical analysis values described with reference to FIGS. 8 and 9.

Dimple shape Depth (mm) Degree Volume fraction cylinder 3.0 N / A 55.53 3.5 N / A 55.77 4.0 N / A 55.20 4.5 N / A 55.47 Cone 3.0 140 55.93 150 55.84 160 55.81 3.5 140 56.13 150 56.15 160 55.70 4.0 150 55.62 160 55.53

Numerical results showed that the maximum volume fraction, cavitation, occurred when the dimple was cone-shaped, 3.5 mm deep, and 150 degree center angle.

As described with reference to FIGS. 8 and 9, the volume fraction was different according to the shape of the dimple, and it was predicted that the cavitation would occur more easily when the dimple was cone-shaped than when the dimple was cylindrical.

The sterilization apparatus according to an embodiment of the present invention has been described above. The sterilization apparatus according to an embodiment of the present invention causes cavitation to the fluid to be sterilized by using the rotating body of the rotating body and performs sterilization through the collapse of bubbles generated by the cavitation caused. Accordingly, it is possible to increase the capacity of the sterilization device and to provide advantages of minimizing secondary pollution and easily changing sterilization conditions.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to a specific embodiment, Comprising: It should be interpreted by the attached Claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

100: sterilizer 110: motor
120: sterilization module 130: first cover
132: inlet 140: second cover
144: outlet 150: rotating body
152: dimple

Claims (14)

A rotating body having a first surface and a second surface and axially rotating; And
A first cover covering the first surface and a second cover covering the second surface, wherein a hollow corresponding to the rotating body is inserted into the first cover and the second cover so that the rotating body is rotated. A cover provided; Including,
The space where the first surface and the first cover face each other is defined as a first sterilization flow path, and the space where the second surface and the second cover face each other is defined as a second sterilization flow path.
Dimples that cause cavitation are formed on surfaces of the rotating body on the first sterilization channel and the second sterilization channel to provide sterilization power,
The first cover is provided with an inlet through which the fluid to be sterilized is provided, and the second cover is provided with an outlet through which the sterilized fluid flows out.
The discharge port is provided radially inward from the dimple on the radially outer side and the second sterilization flow path of the rotating body with respect to the inlet,
The dimple is configured to have a cone shape having a central angle of 150 degrees and a depth of 3.5mm, sterilizer. According to claim 1,
The dimples are sterilizing apparatus arranged in at least two rows in the radial direction of the rotating body. delete delete delete delete delete delete delete delete delete delete delete delete

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