Dry ice block preparation device, preparation method for preparing dry ice blocks using liquefied carbon dioxide, and dry ice blocks prepared thereby

Abstract

The present invention relates to an apparatus and method for preparing dry ice blocks using liquefied carbon dioxide and the dry ice blocks prepared thereby, and includes the following features regarding the preparation of dry ice blocks using liquefied carbon dioxide, that is, liquefied carbon dioxide is injected into the inside of a cylinder having a predetermined internal space, the liquefied carbon dioxide solidifies in the internal space and accumulates at the lower end of the cylinder, and a piston located at the upper end of the cylinder pressurizes the predetermined internal space by descending and compresses and molds the solidified liquefied carbon dioxide pressurized by the piston.

Description

Technical Field

[0001] The present invention relates to a dry ice block manufacturing apparatus, a manufacturing method, and dry ice blocks prepared thereby, which use liquefied carbon dioxide to prepare dry ice blocks. Background Art

[0002] Generally, dry ice refers to solid carbon dioxide and is used as a coolant in various fields. Dry ice can sublimate and turn into gas under atmospheric pressure conditions, and the sublimation point is approximately minus 78.5 degrees. Such dry ice is made into blocks and used as a coolant. When mainly moving food or medicine, an appropriate amount of dry ice is packaged together in a storage box according to the moving distance for transportation.

[0003] When preparing such dry ice, it is mainly prepared in a granular form and then the granules are reprocessed and compressed into dry ice. Since the minimum unit of the dry ice prepared by this manufacturing process is the particle size, it is difficult to fill the space between particles with particles during the process of recompressing the compressed particles. This results in a decrease in the density of the prepared dry ice and a relatively shortened sublimation time relative to the volume of the dry ice.

[0004] Therefore, in recent years, for the distribution efficiency of food or medicine, etc., smaller-volume dry ice is more preferred during the circulation process. For this reason, corresponding dry ice manufacturing methods, etc., are currently being studied. Summary of the Invention

[0005] Technical Problem

[0006] An object of an embodiment of the present invention is to provide dry ice blocks prepared by directly phase-changing liquefied carbon dioxide into solid dry ice.

[0007] An object of an embodiment of the present invention is to provide a method for directly phase-changing liquefied carbon dioxide into solid dry ice.

[0008] Technical Solution

[0009] There is provided a dry ice block manufacturing apparatus for manufacturing dry ice by ejecting snow-like liquefied carbon dioxide in which liquefied carbon dioxide is pressurized and phase-changed.

[0010] There is provided a dry ice block manufactured by the dry ice block manufacturing apparatus.

[0011] There is provided a method for manufacturing dry ice blocks by the dry ice block manufacturing apparatus.

[0012] A support base, which is fixed to the ground, is formed to extend upward, and includes a support plate opposed to the upper side at its upper end; a first housing, which can reciprocate in the extending direction of the support base along the extending surface of the support base; a second housing, which forms a compression space with airtightness when contacting each other when the first housing moves upward, and forms a supply hole connected to a supply pipeline for supplying liquid carbon dioxide to the compression space; and a pressure piston, which passes through the second housing and can reciprocate in the compression space, wherein the pressure piston can descend so that the compression space is determined within a pressure range of 16 bar to 20 bar.

[0013] In addition, the pressure piston approaches the support plate in the compression space, and the liquid carbon dioxide can be pressurized.

[0014] The second housing and the support base are fixed and can be driven by the reciprocating movement of the first housing and the pressure piston.

[0015] The first housing has a groove formed on the surface in contact with the second housing, and includes a sealing portion provided in the groove, while the second housing may include a protrusion of a metal material having a shape corresponding to the sealing portion on the surface in contact with the first housing.

[0016] A support base, which is fixed to the ground, is formed to extend upward, and includes a support plate opposed to the upper side at its upper end; a first housing, which can reciprocate in the extending direction of the support base along the extending surface of the support base; a second housing, which forms a compression space with airtightness when contacting each other when the first housing moves upward, and forms a supply hole connected to a supply pipeline for supplying liquid carbon dioxide to the compression space; and a pressure piston, which passes through the second housing and can reciprocate in the compression space, wherein the pressure piston approaches the support plate and the liquid carbon dioxide is pressurized, and the pressure piston can descend so that the compression space is determined within a pressure range of 16 bar to 20 bar.

[0017] In addition, the second housing and the support base are fixed and can be driven by the reciprocating movement of the first housing and the pressure piston.

[0018] In addition, the first housing has a groove formed on the surface in contact with the second housing, and includes a sealing portion provided in the groove, and the second housing may include a protrusion of a metal material having a shape corresponding to the sealing portion on the surface in contact with the first housing.

[0019] In addition, it includes: a first housing moving step in which the first housing moves along the extending direction of a support base fixedly supported on the ground and comes into contact with the second housing; a compression space forming step in which the interior that is made to communicate between the first housing and the second housing by the movement of the first housing is kept airtight; a liquid carbon dioxide injecting step in which liquid carbon dioxide is injected into the compression space formed in the compression space forming step; a pressurizing step in which a pressure piston connected to the second housing moves in the pressurizing direction that is the direction of the support base to pressurize the liquid carbon dioxide injected in the liquid carbon dioxide injecting step, a returning step in which, after the pressurizing step, the pressure piston and the first housing return; and a discharging step in which the pressurized liquid carbon dioxide after the returning step is discharged to change the state to dry ice, wherein, in the compression space, the pressure piston approaches the support plate, the liquid carbon dioxide is pressurized, and the pressure piston can descend, such that the compression space is determined within a pressure range of 16 bar to 20 bar.

[0020] In addition, when the pressing force of the pressing piston acts in the direction of the support base, the pressing force can be supported by the reaction force of the support base fixed to the ground.

[0021] In addition, a cylinder includes a first housing and a second housing, and a pressurization space is formed inside by the contact between the first housing and the second housing; and a piston that moves from the second housing side to the first housing inside the cylinder and pressurizes the pressurization space, wherein the piston includes: a fixing plate that has a pressurization support surface opposite to the pressurizing direction inside the cylinder; a variable plate that includes an upper and lower variable part that can move in the pressurizing direction and a lateral variable part that is located around the upper and lower variable part and can expand based on lateral movement in the pressurizing direction; and an elastic body that elastically deforms in the pressurizing direction between the fixing plate and the variable plate; wherein the lateral variable part includes a first linkage part and a second linkage part that come into contact with the inner wall of the cylinder, and as it moves upward in the pressurizing direction, the width of the inner wall of the cylinder is reduced, thereby reducing the pressurization area, whereby the first and second linkage parts pressurize the upper and lower variable parts, and if the upper and lower variable parts are pressurized by the lateral variable part, they can elastically move toward the pressure support surface.

[0022] In addition, one end of a connecting pin is fixedly connected to the fixing plate, and the other end is connected to the upper and lower variable part, and the connecting pin forms a gap by being connected to the upper and lower variable part and can be separated by a predetermined distance in the pressurizing direction.

[0023] In addition, the first linkage part includes an inclined surface that is angularly separated within a range of 45 degrees from at least three or more pressurizing directions corresponding to the upper and lower variable parts opposed to the outside in a plane in the pressurizing direction; the second linkage part can also be alternately arranged around the upper and lower variable part in a state of coming into contact with the first linkage part around the upper and lower variable part.

[0024] The first housing may include a tapered portion that is reduced while keeping the laterally variable portion that expands laterally from the inner side of the second housing in a state of being in contact with the inner surface of the first housing and the cylinder as the piston moves in the pressurizing direction.

[0025] In addition, it includes: a rod extending from the outside to the inside of the cylinder; and a pressing plate connected to one end of the rod located inside the cylinder body and pressing in the pressing direction from a first pressing section formed inside the cylinder body to a second pressing section, and being expanded to contact the inner wall of the cylinder. The pressing plate includes: a dispersive pressing section formed in a shape convexly bent in the pressing direction; and a pressing end portion that contacts the inner wall of the cylinder at the end side of the dispersive pressing section and is formed on a plane facing the pressing direction. The dispersive pressing section can disperse uneven snow accumulation in a form corresponding to the formed shape in the second pressing section before pressing through the contact between the pressing plate and the snow.

[0026] In addition, the dispersive pressing section may be formed in a hemispherical shape convex in the pressing direction.

[0027] In addition, the pressing end can press and move the snow on the side by being pressed by the dispersive pressing section in the pressing direction.

[0028] Effects of the Invention

[0029] According to an embodiment of the present invention, dry ice blocks prepared by directly phase-changing liquefied carbon dioxide into solid dry ice can be provided.

[0030] According to an embodiment of the present invention, a method for directly phase-changing liquefied carbon dioxide into solid dry ice can be provided. Brief Description of the Drawings

[0031] Figure 1 A diagram showing a state where existing particles are being extruded.

[0032] Figure 2 A diagram showing a method for preparing dry ice by compressing existing particles.

[0033] Figure 3 Dry ice blocks prepared by compressing existing particles.

[0034] Figure 4 A flowchart showing a preparation process of dry ice according to an embodiment of the present invention.

[0035] Figure 5 A schematic diagram showing a dry ice preparation process according to an embodiment of the present invention.

[0036] Figure 6 Dry ice blocks prepared from liquefied carbon dioxide according to an embodiment of the present invention.

[0037] Figure 7 To test the sublimation rate data of the dry ice blocks of an embodiment of the present invention and those prepared from existing compressed particles.

[0038] Figure 8 Showing a dry ice production device as the prior art, Figure 8 Part (a) to Figure 8 Part (d) shows the production processes executed in sequence.

[0039] Figure 9 A diagram showing the state where dry ice production devices of multiple embodiments of the first aspect of the present invention are connected.

[0040] Figure 10 A diagram showing the airtight holding structure of an embodiment of the first aspect of the present invention, Figure 10 Part (a) shows a groove and a sealing part as the first airtight holding structure. Figure 10 Part (b) shows a protrusion as the second airtight holding structure.

[0041] Figure 11 A diagram showing the dry ice production device of an embodiment of the first aspect of the present invention, Figure 11 Part (a) shows the state where the first housing returns. Figure 11 Part (b) shows the state where the first housing rises to form a compression space. Figure 11 Part (c) shows the diagram where the pressurizing piston descends to pressurize liquefied carbon dioxide.

[0042] Figure 12 A diagram showing the interiors of the first housing and the second housing during pressurization in an embodiment of the first aspect of the present invention.

[0043] Figure 13 A flowchart showing the dry ice production method of an embodiment of the first aspect of the present invention.

[0044] Figure 14 A diagram showing the dry ice production device of an embodiment of the second aspect of the present invention, Figure 14 Part (a) shows the first housing located at the origin before rising. Figure 14 Part (b) shows the state where the first housing rises to form a pressurization space inside the cylinder. Figure 14 Part (c) shows the diagram where the piston descends along the pressurization direction to pressurize the pressurization space.

[0045] Figure 15 A diagram showing the fixed plate and the variable plate of the piston in an embodiment of the second aspect of the present invention, Figure 15 Part (a) shows the reduced state of the variable plate in an embodiment of the present invention. Figure 15Part (b) is a diagram of the expanded state of the variable plate according to an embodiment of the present invention.

[0046] Figure 16 It is a cross-sectional view of the fixed plate and the variable plate of the piston according to an embodiment of the second aspect of the present invention. Figure 16 Part (a) is a cross-sectional view showing the contracted state of the variable plate according to an embodiment of the present invention. Figure 16 Part (b) is a cross-sectional view showing the expanded state of the variable plate according to an embodiment of the present invention.

[0047] Figure 17 It is a diagram showing the steps of the fixed plate and the variable plate descending in intervals inside the cylinder according to an embodiment of the second aspect of the present invention.

[0048] Figure 18 It is a diagram showing a dry ice block preparation device according to an embodiment of the third aspect of the present invention. Figure 18 Part (a) is a diagram showing the first housing and the second housing located at the origin in a separated state. Figure 18 Part (b) is a diagram showing that a cylinder is formed by the contact between the first housing and the second housing due to the upward movement of the first housing. Figure 18 Part (c) is a diagram showing the piston moving in the cylinder along the pressing direction.

[0049] Figure 19 It is a diagram showing a piston according to an embodiment of the third aspect of the present invention.

[0050] Figure 20 It is a diagram showing the piston moving along the pressing direction according to an embodiment of the third aspect of the present invention.

[0051] Figure 21 It is a diagram showing the dry ice blocks generated by the dry ice block preparation device according to an embodiment of the third aspect of the present invention. Detailed Embodiments

[0052] Hereinafter, the detailed embodiments of the present invention will be described with reference to the accompanying drawings. However, this is merely an example, and the present invention is not limited thereto.

[0053] In the process of describing the present invention, when it is determined that the detailed description of the well-known technology related to the present invention may unnecessarily confuse the gist of the present invention, the detailed description thereof will be omitted. Also, the terms described below are defined in consideration of the functions in the present invention, and these may change according to the intentions or conventions of users and operators. Therefore, such terms should be defined based on the overall content of this specification.

[0054] The technical idea of the present invention is determined by the claims, and the following embodiments are merely a way to effectively explain the technical idea of the present invention to those of ordinary skill in the technical field to which the present invention pertains.

[0055] Figure 1 A view showing the state in which the existing granule A2a is being extruded Figure 2 A view showing a method of preparing dry ice by compressing the existing granule A2a Figure 3 A dry ice block A10 prepared by compressing the existing granule A2a

[0056] Referring to Figures 1 to 3 , in the existing dry ice preparation method, after carbon dioxide is exposed to an environment such as a predetermined air pressure and temperature and is prepared into solid carbon dioxide in a granular form, it is secondarily formed to produce dry ice. As Figure 1 shown, when the extruded granule A2 is prepared by the extrusion head A1, it is accommodated in the cylinder A4 and pressurized by the piston A3, thereby preparing the dry ice block A10 formed by compression between the granules A2a.

[0057] During the extrusion process of the dry ice block A10 prepared by this preparation process, it is first pressure-formed, and secondly, pressure-forming between the granules A2a is achieved. In this case, the granules A2a that have been pressurized and finally pressure-formed are already in a state of being pressurized to a specified level, and thus may be in a high-density state. Therefore, even if further pressurization is performed, it is difficult to perform compression molding through this. That is, compression molding requires a higher pressing force, and even in the case where compression molding is achieved by pressurization, since the minimum particle size is equivalent to the size of the granule A2a, voids A12 may be formed between the granules A2a.

[0058] Furthermore, considering that the size of the granule A2a is usually formed to be 3 mm or more based on the diameter, conditions for forming voids A12 between the compressed granules A11 have to be formed. Of course, when the granule A2a is a rectangular parallelepiped of the same size and is pressurized in an aligned state, voids A12 may not be generated. Since it is effective when the granule A2a is in the form of a circular cross-sectional area during the extrusion process, the generation of voids A12 during the compression molding process between the compressed granules A11 is inevitable.

[0059] Figure 4 A flowchart showing the preparation process of dry ice according to an embodiment of the present invention Figure 5 A simplified view showing the dry ice preparation process according to an embodiment of the present invention

[0060] Referring to Figure 4, the method for preparing dry ice block A10 using liquefied carbon dioxide according to the present invention may include: an injection step AS10 of injecting liquefied carbon dioxide into the interior of a cylinder A4 having a predetermined internal space; a solidification step AS20 in which the liquefied carbon dioxide solidifies in the internal space and accumulates at the lower end of the cylinder A4; a pressurization step AS30 in which a piston A3 located at the upper end of the cylinder A4 descends to pressurize the predetermined internal space; and a shaping step AS40 of compression-molding the solidified liquefied carbon dioxide pressurized by the piston A3.

[0061] Among them, the particle size of the solidified liquefied carbon dioxide may be at least less than 1 mm. Preferably, according to Figure 5 the nozzle of the supply unit A5 shown, the particle size of the liquefied carbon dioxide can be determined in micron units. Of course, the present invention is not limited thereto, and can be determined according to the nozzle structure. The smaller the particle size, the more preferable, but it can have a particle size of at least less than 1 mm.

[0062] Moreover, the predetermined internal space at the time of injecting the liquefied carbon dioxide may be in an atmospheric pressure state. The liquefied carbon dioxide injected under the atmospheric pressure state can lower the internal temperature of the cylinder A7. In this case, the liquid-phase carbon dioxide solidified by the descent of the piston A6 can be compressed. That is, since it is exposed to a low-temperature and high-pressure state, dry ice block A10 can be formed.

[0063] The dry ice block A100 prepared by the method as described above has a small particle size and is in an initial compressed state, so it can be compressed more firmly, and voids A12 between the particles solidified to the extent of snow A100a may not be generated. That is, due to the low volume-mass ratio, a high density may be formed. The dry ice block A100 of the present invention formed with a high density (refer to Figure 6 ) has no voids A12, so the surface area exposed to the air is narrow, and thus the sublimation rate may be very slow. Thus, dry ice that can be cooled for a long time can be prepared.

[0064] Figure 7 To test the sublimation rate data of the dry ice block A100 of an embodiment of the present invention and the dry ice block A10 prepared from the existing compressed particles A11. Refer to Figure 7 , the sublimation of the dry ice blocks A10, A100 can proceed in the order from the first sublimation interval AV1, AF1 to the second sublimation interval AV2, AF2. Among them, the difference between the present invention and the dry ice blocks A10, A100 prepared from the compressed existing particles A2a lies in the sublimation speed, which depends on the presence or absence of the above-mentioned voids A12. It can be confirmed that in the sublimation interval of the dry ice block A100 of the present invention, the slope of the second sublimation interval AV2 is gentler than that of the first sublimation interval AV1. This is because there are no voids, so at Figure 6When preparing the dry ice block A100 in the form of a cube as shown, the surface area decreases as sublimation occurs, which may cause the sublimation rate to slow down.

[0065] In contrast, in the dry ice block A10 prepared by compressing the particles A2a, the slope of the second sublimation section AF2 is greater than the slope of the first sublimation section AF1. This means that the sublimation rate increases, and it also means that as the voids A12 of the dry ice block A10 exposed to the atmosphere sublimate, the exposed surface area increases and the sublimation rate gradually accelerates. It can be seen that before complete sublimation, the exposed surface area decreases with the volume itself, so the sublimation rate decreases.

[0066] Considering this sublimation trend and duration, the method for preparing the dry ice block A100 using liquefied carbon dioxide according to an embodiment of the present invention can produce a high-density dry ice block A100 that can perform a more effective cooling function.

[0067] Figure 8 Figure (a) to Figure 8 shows a dry ice preparation device B10 as the prior art, Figure 8 Figure (d) are diagrams showing the preparation processes performed in sequence.

[0068] Referring to Figure 8 Figure (a) to Figure 8 Figure (d), the existing dry ice preparation device B10 includes: a cylinder B1 having a compression space BP formed therein; a forming plate B2 located below the cylinder B1 for forming dry ice; and a support end B3 for supporting the forming plate B2. The existing dry ice preparation device B10 is a device that generates dry ice by moving the forming plate B2 upward from the lower part of the cylinder B1 to contact the cylinder B1 and then lowering a pressurizing member B1a in the cylinder B1. Among them, since the pressurizing member B1a descends while increasing the pressure in the cylinder B1, the pressure can increase in all directions within the cylinder B1. The inner wall of the cylinder B1 is located on the side and can be supported with relatively high strength, and the descending pressurizing member B1a is located above, so even the pressure that the pressurizing member B1a can output can be transmitted. However, only when the forming plate B2 supports a pressure above the pressure that the pressurizing member B1a can output without being pushed, can the output be completely transmitted to the compression of the dry ice.

[0069] Since the above-mentioned forming plate B2 moves upward and contacts the cylinder B1, it can move up and down. This may cause a downward push to occur again during the pressurization process due to the load corresponding to the upward movement distance pressurized by the pressurizing member B1a. Among them, since the push exhibits the effect of buffering the pressing force output from the pressurizing member B1a in the direction of the applied pressure, the expected output cannot be transmitted to the dry ice, and since the prepared density is lower than the expected value, the vaporization rate of the dry ice will be higher than expected. That is, the process of such a device and a driving device results in a short lifespan of the prepared dry ice.

[0070] Figure 9 A view showing a state in which a plurality of dry ice production devices B10 according to a first aspect of the present invention are connected, which is a view showing a partially cut state for ease of explanation.

[0071] Refer to Figure 9 , the dry ice production device B10 can drive by connecting a plurality of devices to increase the dry ice production amount. This example discloses such an embodiment, and of course, it can be independently driven.

[0072] The dry ice production device B10a according to an embodiment of the present invention may include a support base B100, a first housing B200, a second housing B300, and a pressurizing piston B400. Specifically, the support base B100 can be fixed to the ground. Being fixed to the ground means that even if pressure is transmitted from the pressurizing piston B400, it will not be moved by the above pressure but can be fixed. For example, it means that when the pressurizing piston B400 pressurizes the support base B100 from the upper side downward, phenomena such as pressure relief due to the presumption in the pressurizing direction BD will not occur. The pressurizing piston B400 can be in a form fixed to the ground and extending upward from the ground. Dry ice can be formed on the upper surface of the upward-extending support base B100.

[0073] Moreover, the first housing B200 can move upward along the extending side surface of the support base B100. Specifically, it can move upward, perform a predetermined process, and then return. When it returns, the height where it is located is not higher than the upper surface of the support base B100. The first housing B200 can move upward to contact the second housing B300. Through the contact between the first housing B200 and the second housing B300, the internal spaces of the first housing B200 and the second housing B300 communicate with each other, and the above internal space can become a compression target space.

[0074] As the above-mentioned first housing B200 moves upward and contacts the second housing B300, a compression space BP is formed, and the compression space BP can be pressurized and compressed by the downward movement of the pressurizing piston B400. Of course, liquid carbon dioxide can also be injected before the pressurizing piston B400 descends. The liquid carbon dioxide can be injected through the supply hole B301 provided in the second housing B300. A supply line (not shown) can be connected to the supply hole B301 to supply the liquid carbon dioxide.

[0075] Among them, the pressurization of the pressurizing piston B400 can be carried out in the pressurizing direction BD, and the area of the pressurizing surface of the pressurizing piston B400 can be the same as the area of the upper surface of the support base B100. And the pressurization in the above-mentioned pressurizing direction BD can pressurize the support base B100 downward. Among them, as described above, since the support base B100 is fixed to the ground, it will not move such as being pushed due to the above downward pressurization. Thus, the pressing force of the pressurizing piston B400 is used to form dry ice corresponding to the output. For this process, it is necessary to form high-pressure conditions, and it is also necessary to maintain airtightness even under high-pressure conditions. Therefore, an airtightness maintaining structure can be provided at the contact portion between the first housing B200 and the second housing B300. The airtightness maintaining structure includes a first airtightness maintaining structure a provided on the side of the first housing B200 and a second airtightness maintaining structure b provided on the side of the second housing B300, and the airtight state can be more effectively maintained through their contact. Specifically, it will be described below Figure 10 as follows.

[0076] Figure 10 FIG. is a diagram showing an airtightness maintaining structure according to an embodiment of the first aspect of the present invention, Figure 10 part (a) of which is a diagram showing the groove B210 and the sealing portion B220 as the first airtightness maintaining structure a, Figure 10 part (b) of which is a diagram showing the protrusion B320 as the second airtightness maintaining structure b.

[0077] Referring to Figure 10 part (a) of, the upper surface of the support base B100 can be the forming portion B110. The forming portion B110 is a place for preparing and placing dry ice, and can be the topmost portion of the support base B100 fixed to the ground. The first housing B200 moves upward along the extending direction of the support base B100 to contact the second housing B300. In this case, the first airtightness maintaining structure a on the contacting first housing B200 side can be the sealing portion B220.

[0078] The above-mentioned sealing portion B220 can be arranged in a state of being inserted into the groove B210 formed in the first housing B200. The groove B210 can be in the shape of In this form, the detachment of the sealing portion B220 is prevented. Since the sealing portion B220 is easily exposed to low temperatures and repeatedly subjected to pressure, it can be made of a material that is advantageous for low-temperature pressurization. For example, it can be polytetrafluoroethylene (PTFE).

[0079] On the other hand, the second airtight holding structure b corresponding to the above-mentioned sealing portion B220 can be a protrusion B320 formed on the first housing B200. The protrusion B320 can be formed on one surface of the second housing B300 facing the first housing B200 and can be formed to correspond to the sealing portion B220.

[0080] Among them, the maintenance of the airtight state achieved by maintaining the contact state between the sealing portion B220 and the protrusion B320 can be achieved when the descending position of the pressurizing piston B400 is higher than the contact position between the first housing B200 and the second housing B300. That is, during the pressurization process of the pressurizing piston B400, the lower the descending position of the pressurizing piston B400, the greater the pressure. Therefore, the critical point of the pressure condition capable of maintaining the airtight state can be considered for design. For example, it can be designed by adjusting the rising height BH of the first housing B200 according to the airtight state maintaining ability.

[0081] Figure 11 FIG. showing a dry ice preparation apparatus B10 according to an embodiment of the first aspect of the present invention, Figure 11 Part (a) of which shows the state where the first housing B200 returns, Figure 11 Part (b) of which shows the state where the first housing B200 rises to form a compression space BP, Figure 11 Part (c) of which shows the state where the pressurizing piston B400 descends to pressurize liquefied carbon dioxide.

[0082] Figure 11 Part (a) of which can be a return state where the contact surfaces of the first housing B200 and the second housing are configured to face each other. At the same time, the pressurizing surface of the pressurizing piston B400 is configured to face the upper surface of the support base B100. Since this structure is formed by vertical movement, the moving shaft can be driven on one axis. That is, since there is no horizontal movement and the support base B100 fixed to the ground is pressurized from above, the structure and process of the device are simpler than Figure 1 the prior art shown and more effective in preparing dry ice.

[0083] Referring to Figure 11 Part (b) of which and Figure 11 Part (c) of which, in the internal airtight space where the first housing B200 rises and communicates with the second housing B300 ( Figure 4In part (b) thereof, the injected liquid-phase carbon dioxide can be pressurized by forming a compression space BP. In a state where an airtight space is formed, the position of the molding portion B110, which is the upper surface of the support base B100, can be lower than the sealing portion B220. In this structure, as the pressurizing piston B400 descends, a high pressure is gradually formed. At the maximum high pressure (for example, in the pressure range of 16 bar to 20 bar), instead of relying on sealing to maintain the airtight state, it can rely on the output of the descending pressurizing piston B400. This can be achieved by Figure 5 Specifically described.

[0084] Figure 12 FIG. is a view showing the inside of the first housing B200 and the second housing B300 during pressurization according to an embodiment of the first aspect of the present invention.

[0085] Referring to Figure 12 , the first housing B200 and the second housing B300 can form an airtight space in the communicating interior in a state of being in contact with each other by the upward movement of the first housing B200, and the liquid-phase carbon dioxide can be injected into the airtight space through the second housing B300. As the pressurizing piston B400 descends, the airtight space can be changed to a high-pressure state. Solid dry ice can be formed in the compression space BP in a predetermined high-pressure state. In this case, in order to accommodate the high pressure in an airtight state, it can rely on the internal structure of the first housing B200 rather than the sealing portion B220. That is, the pressurizing piston B400 reaching the position where the high-pressure environment is formed can be in a state of moving toward the first housing B200 side. Among them, the high pressure can be a state where the pressurizing piston B400 moves toward the first housing B200 side under a pressure of 80% or more of the corresponding predetermined maximum pressure.

[0086] In this structure, the surfaces exposed to the compression space BP in the above high-pressure state can be the first housing B200, the pressurizing piston B400, and the upper surface B (molding portion B110) of the support base B100. That is, the contact portion B150 where the first housing B200 and the second housing B300 are in contact is located at a predetermined rising height BH according to the rising height of the first housing B200, and the pressure plate can form 80% or more of the maximum pressure in a state where it is located at a position lower than the contact portion B150. Thus, the liquid-phase carbon dioxide can be solidified in the compression space BP and formed into dry ice.

[0087] Figure 13 FIG. is a flowchart showing a method for preparing dry ice according to an embodiment of the first aspect of the present invention. Referring to Figure 13 , the method for preparing dry ice can include a first housing moving step BS10, a compression space forming step BS20, a liquid-phase carbon dioxide injecting step BS30, a liquid-phase carbon dioxide pressurizing step BS40, a return step BS50, and a dry ice discharging step BS60.

[0088] Specifically, in the first housing moving step BS10, the first housing B200 rises along the vertical direction. The upward movement of the first housing B200 along the vertical direction is an upward movement along the extending direction of the support base B100. By moving the first housing B200, the first housing B200 can contact the second housing B300 located above. The first housing B200 in contact with the second housing B300 can form an airtight space inside the communication. The above-mentioned airtight space is a space for compression.

[0089] When the first housing B200 rises, a compression space BP forming step is performed. When the compression space BP is formed, a liquid-phase carbon dioxide injection step of injecting liquid-phase carbon dioxide into the above-mentioned compression space BP through the second housing B300 can be performed. When injecting liquid-phase carbon dioxide, a liquid-phase carbon dioxide pressurizing step BS40 is performed by the downward movement of the pressurizing piston B400. The pressurized liquid-phase carbon dioxide can be made into solid dry ice. After forming dry ice by pressing, the pressurizing piston B400 and the first housing B200 can return to the state before the movement. When the return step BS50 is completed, a dry ice discharging step is performed, so that dry ice can be collected.

[0090] Figure 14 A diagram showing a dry ice preparation device according to an embodiment of the second aspect of the present invention, Figure 14 Part (a) shows a diagram of the first housing C110 located at the origin before rising, Figure 14 Part (b) shows a diagram of the first housing C110 rising to form a pressurized space CP inside the cylinder C100, Figure 14 Part (c) shows a diagram of the piston C200 descending along the pressurizing direction to pressurize the pressurized space CP.

[0091] Referring to Figure 14 Parts (a) to Figure 14 Part (c) of the present invention, a dry ice preparation device according to an embodiment of the present invention includes a cylinder C100 and a piston C200. Specifically, the cylinder C100 includes a first housing C110 and a second housing C120. The first housing C110 and the second housing C120 can be separated from each other in a state located at the origin. By moving one or more of the first housing C110 and the second housing C120, the first housing C110 and the second housing C120 can come into contact with each other, and the contacting state can form the internal space of the cylinder C100. The above-mentioned internal space can become a pressurized space CP. The pressurized space CP can be pressurized by the movement of the piston C200 located on the second housing C120 side to increase the pressure. That is, when the above-mentioned pressurized space CP is formed inside the cylinder C100, as the piston C200 moves into the pressurized space CP, the volume inside the pressurized space CP decreases, and the pressure of the decreased volume relatively increases.

[0092] Among them, the increased pressure can be determined within the range of 16 bar to 20 bar. Dry ice can be formed within the above pressure range. Of course, dry ice can be formed by pressurizing the pressurization space CP by the piston C200 in the state of injecting liquid-phase carbon dioxide. The liquid-phase carbon dioxide can be injected through a supply hole formed on one side of the second housing C120. The supply hole can be formed on the surface facing the pressurization space CP in the state before the pressurization space CP is pressurized by the piston C200. Of course, during the process of the piston C200 pressurizing toward the pressure space side, the supply hole is not exposed from the pressure space side, so that airtightness can be maintained.

[0093] Moreover, in order to relatively provide high pressure to the liquid-phase carbon dioxide based on this principle, in the dry ice preparation device according to an embodiment of the second aspect of the present invention, at the time point when the pressure exceeds a predetermined pressure in terms of structure, at least a part of the piston C200 (hereinafter, variable plate C220) is located inside the first housing C110. And the inside of the first housing includes a structure in which the cross-sectional area becomes narrower as the piston C200 moves in the pressurization direction.

[0094] To illustrate the above structure, the following will be described through Figures 15 to 17 description. First, as the cross-sectional area becomes narrower as described above, a part of the piston C200 can correspond to the variable structure. This will be specifically described below.

[0095] Figure 15 FIG. showing the fixed plate C210 and variable plate C220 of the piston C200 according to an embodiment of the second aspect of the present invention, Figure 15 Part (a) of [] is a diagram showing the reduced state of the variable plate C220 according to an embodiment of the present invention, Figure 15 Part (b) of [] is a diagram showing the expanded state of the variable plate C220 according to an embodiment of the present invention.

[0096] Referring to Figure 15 Part (a) of [] and Figure 15 Part (b) of [], the piston C200 includes a fixed plate C210, a variable plate C220, and an elastomer C300. Of course, a rod for transmitting the pressing force toward the pressurization direction through the fixed plate C210 is connected to the fixed plate C210, but the structure corresponding to the above rod is an obvious structure and thus not shown. The following will describe the fixed plate C210 and the variable plate C220, and it will be referred to as the piston C200.

[0097] The illustrated piston C200 can represent a state based on the state of a dry ice preparation device. When the preparation device is in the origin state before driving, the variable plate C220 is in an extended state. As the piston C200 is pressurized, the variable plate C220 can shrink while passing through the inside of the first housing C110. Among them, the extension and shrinkage can be the lateral extension and shrinkage based on the pressurization direction. That is, it represents the extension and shrinkage of the pressurized area during the pressurization process.

[0098] On the other hand, the fixed plate C210 performs the functions of supporting and pressurizing the variable plate C220 in the pressurization direction. The variable plate C220 is arranged along the pressurization direction from the fixed plate C210 and can be configured to face the pressurization support surface C211 of the fixed plate C210. According to the pressurization state, a part of the variable plate C220 is separated from or in contact with the fixed plate C210.

[0099] Specifically, the variable plate C220 includes an upper and lower variable part C221 and a lateral variable part C222. The upper and lower variable part C221 can be configured in a state where the elastomer C300 is interposed between the fixed plates C210. One end of the elastomer C300 can be connected to the side of the pressurization support surface C211, and the other end can be connected to the upper and lower variable part C221. The elastomer C300 can be elastically deformed at least in the pressurization direction, that is, in the direction connecting the above-mentioned one end and the other end. In this case, the elastic force generated by the elastomer C300 is transmitted to the pressurization support surface C211 and the upper and lower variable part C221. The fixed support part is fixed to the above-mentioned rod C (not shown), so the relative movement is restricted, and thus the action caused by the elastic force is expressed through the upper and lower variable part C221.

[0100] The elastomer C300 can be arranged in a state of being inserted into the fixed plate C210 to a predetermined depth. Therefore, when a force exceeding the elastic force of the elastomer C300 is generated in the direction opposite to the pressurization direction, the elastomer C300 shrinks into the fixed plate C210, and the upper and lower variable part C221 can be in contact with the pressurization support surface C211. That is, the contact or separation between the upper and lower variable part C221 and the pressurization support surface C211 can be determined according to the force applied in the direction from one end to the other end or from the other end to one end of the elastomer C300.

[0101] On the other hand, the side variable part C222 of the variable plate C220 may include a first linkage part C225 and a second linkage part C226. The first linkage part C225 may be located on the side-facing surface side of the up-and-down variable part C221 and maintain a surface contact state with the up-and-down variable part C221. The second linkage part C226 may at least maintain surface contact with the first linkage part C225 and move toward the other side in linkage with the sideward movement of the first linkage part C225. Among them, the linkage may be caused by the inclined surface contact between each structure during the process of moving under the external force in the pressurizing direction or the opposite direction of the pressurizing direction. That is, when a force is applied in the pressurizing direction and the opposite direction of the pressurizing direction, in addition to the pressurizing direction, it also moves toward the side based on the pressurizing direction. Among them, the pressurizing area expands and contracts through the sideward movement.

[0102] Furthermore, the first linkage part C225, the second linkage part C226, and the up-and-down variable part C221 may be in contact with each other through surface contact. The contact relationship formed through surface contact is to maintain the airtightness of the pressurizing space CP. However, it is not limited to the illustrated example of the piston C200. The contact between the second linkage part C226 and the up-and-down variable part C221 may also be in surface contact including a plane or a curved surface. In the case of a plane, the width of the contact surface is formed identically according to the pressurizing direction. In the case of a curved surface, the radius or curvature may be kept the same according to the pressurizing direction.

[0103] Moreover, the fixed plate C210 may be arranged with the variable plate C220 with the elastomer C300 therebetween. During this process, they may be fixed to each other through the elastomer C300, but they may also be connected by the connecting pin C10. One end of the connecting pin C10 is fixedly connected to the fixed plate C210 side, and a clearance space C11 is formed on the other end on the variable plate C220 side, so as to be connected in a movable state. This will be described later through Figure 16 as follows.

[0104] Figure 16 is a cross-sectional view of the fixed plate C210 and the variable plate C220 of the piston C200 according to an embodiment of the second aspect of the present invention, Figure 16 part (a) of which is a cross-sectional view showing the reduced state of the variable plate C220 according to an embodiment of the present invention, Figure 16 part (b) of which is a cross-sectional view showing the expanded state of the variable plate C220 according to an embodiment of the present invention.

[0105] Referring to Figure 16 part (a) of which and Figure 16In part (b), the connecting pin C10 allows the variable plate C220 to be connected to the fixed plate C210 to pull the upper and lower variable parts C221 during the reciprocation of the piston C200 inside the cylinder C100. However, since each part of the variable plate C220 moves upward, downward, and laterally, a clearance space C11 may be required to accommodate the moving distance. Among them, the clearance space C11 can be formed on the side where the connecting pin C10 is connected. As shown in the figure, when one end of the connecting pin C10 is connected to the fixed plate C210 and the other end is connected to the upper and lower variable parts C221, the other end can be in a form that expands compared to the section where the connecting pin C10 extends from one end to the other end. Through this form, the upper and lower variable parts C221 can be pulled. And, a clearance space C11 corresponding to the variable section when the upper and lower variable parts C221 change in the pressurizing direction or the opposite direction of the pressurizing direction is provided in the above expansion space, so that the connecting pin C10 moves and accommodates the variable trajectory when changing within the clearance space C11.

[0106] Although the above piston C200 is illustrated as having a circular rectangular shape, it can also be deformed and implemented if it is in a shape with three or more parts corresponding to the first linkage part C225. Among them, the part corresponding to the first linkage part C225 refers to a structure that needs to be in a straight line shape, because the linkage principle is generated according to the conversion of the movement direction of the inclined plane. Therefore, as a deformable example, deformation embodiments such as circular triangles, triangles, and circular pentagons can be implemented.

[0107] And, preferably, the angle of the above inclined plane is formed within a range of 45 degrees based on the pressurizing direction. This is because when the range of the separated angle exceeds 45 degrees, relatively large ability is required to transmit the lateral movement, which itself will become a resistance, resulting in a loss of the pressing force transmitted to the dry ice. Therefore, within the range separated by 45 degrees, it can be determined to correspond to the expansion and contraction range of the variable plate C220, which will also affect the length of the inclined plane, that is, the thickness of the variable plate C220. As a combination of the above conditions, it is preferably determined that the pressing force transmitted to the dry ice can be minimally lost through the change of the variable plate C220.

[0108] And, the second linkage part C226 can maintain contact with the pressure support surface C211. The maintenance of the contact can be maintained by magnetic force or long holes and guide pins guided to the long holes can be applied, etc. When using long holes and guide pins, a non-through long hole is formed on one side of the second linkage part C226 facing the pressure support surface C211 in the direction of expansion towards the second linkage part C226, and a guide pin can be provided. The guide pin can protrude from the pressure support surface C211 or be inserted into the long hole through the combination of separate components and be guided in the direction of forming the long hole.

[0109] Figure 17 A diagram showing the fixed plate C210 and the variable plate in an embodiment of the second aspect of the present invention and the steps of descending in intervals inside the cylinder C100.

[0110] Refer to Figure 17 , the cylinder C100 includes an expansion section, an entry section CS2, a variable section CS3, and a reduction section CS4. Among them, the expansion section is the section formed inside the second housing C120, and it is the section where the variable plate C220 presses the piston C200 in an expanded state. The entry section CS2 is the section formed in the first housing C110, and it can be provided at the part where the first housing C110 contacts the second housing C120. The variable section CS3 is the section where the variable plate C220 shrinks, and it is formed in a way that narrows along the pressing direction. Moreover, the reduction section CS4 refers to the state where the variable plate C220 shrinks, and it can be the section where the variable plate C220 contacts dry ice to form the dry ice.

[0111] Specifically, after the liquid-phase carbon dioxide is supplied into the cylinder C100, the piston C200 in the expansion section can move in the pressing direction. In the expansion section, a relatively low pressure is generated during the pressing process. Therefore, the elastomer C300 included in the piston C200 may not shrink or shrink very little. Of course, the elastic force of the elastomer C300 is formed to correspond to the pressure to be generated inside the cylinder C100. For example, the elastic force can be determined to be shrunk by the tapered portion C111 of the variable section CS3 rather than by the pressure in the pressure space. Therefore, the piston C200 can move in the pressing direction in the expansion section with the upper and lower variable parts C221 and the pressing support surface C211 separated from each other by the elastic force.

[0112] Moreover, when passing through the expansion section and entering the entry section CS2, the pressure increases to a relatively high pressure. This is designed considering the aspect that it may be difficult to maintain airtightness through the part where the first housing C110 contacts the second housing C120, and it can be determined that the time point exceeding the predetermined pressure is formed from the entry section CS2. The above-mentioned predetermined pressure can be determined between the highest pressure generated in the cylinder C100 and one-third of the highest pressure. That is, the entry section CS2 can become the section where the above-mentioned predetermined pressure is formed.

[0113] Moreover, the variable section CS3 is the section where the variable plate C220 is narrowed. The change in which the variable plate C220 is narrowed is not caused by an increase in pressure within the cylinder C100, but rather is caused by the inner wall of the first housing C110 narrowing, with the piston C200 moving in the pressurizing direction and applying pressure from the side. That is, through the piston C200 moving in the pressurizing direction, the variable plate C220 in contact with the inner surface of the cylinder C100 can be pressurized from the side by the tapered portion C111, and the pressure generated during this process can pressurize the first linkage portion C225, the second linkage portion C226, and the upper and lower variable portion C221 from the side.

[0114] Since the side variable portion C222 including the above-mentioned first linkage portion C225 and second linkage portion C226 is in a state where the inclined surface is in contact with the upper and lower variable portion C221, the side variable portion C222 in which the first linkage portion C225 and the second linkage portion C226 are alternately arranged along the circumferential direction of the upper and lower variable portion C221 can move the upper and lower variable portion C221 in the direction opposite to the pressurizing direction. Among them, the force for moving in the direction opposite to the pressurizing direction is greater than the elastic restoring force of the elastic body C300, so that the upper and lower variable portion C221 can be closely attached to the pressurizing support surface C211. Thereby, the upper and lower pressurizing portions are in contact with the pressurizing support surface C211, and the side variable portion C222 is narrowed, so that the pressurizing surface of the variable plate C220 in the pressurizing direction can be narrowed.

[0115] Next, at the time point of passing through the variable section CS3, the variable plate C220 is in a narrowed state, and the narrowed variable plate C220 can be pressurized while moving to the remaining pressurizing section in the narrowing section CS4. In this case, since dry ice is being prepared, the dry ice can be formed by contacting the dry ice. When the pressurization is completed and the dry ice is generated, the dry ice preparation device can return to the origin. The first housing C110 can be lowered to a position lower than the height of the dry ice to be able to discharge the dry ice.

[0116] The piston D200 with a curved pressurizing surface according to an embodiment of the third aspect of the present invention to be described below has a curved shape with a protruding pressurizing surface. When pressurizing, it can evenly distribute the snow D10, and the even distribution of the snow D10 can prepare dry ice blocks D11 with a uniform density during the press-forming process by the piston D200. That is, the curved pressurizing surface shape induces the even distribution of the snow D10, so that the dry ice blocks D11 have a uniform density as a whole when pressurized.

[0117] Figure 18 FIG. for showing a dry ice block D11 preparation device according to an embodiment of the third aspect of the present invention Figure 18 Part (a) of which is a diagram showing the first housing D110 and the second housing D120 located at the origin in a separated state Figure 18Part (b) is a diagram showing the rise of the first housing D110 and forming the cylinder D100 through the contact between the first housing D110 and the second housing D120. Figure 18 Part (c) is a diagram showing the piston D200 moving in the cylinder D100 along the pressurization direction.

[0118] Referring to Figure 18 Part (a) to Figure 18 Part (c), the dry ice D11 preparation device according to an embodiment of the present invention includes a cylinder D100 and a piston D200. Specifically, the cylinder D100 includes a first housing D110 and a second housing D120. The first housing D110 and the second housing D120 can be separated from each other in a state located at the origin. Through the movement of one or more of the first housing D110 and the second housing D120, the first housing D110 and the second housing D120 can come into contact with each other, and the contacting state can form the internal space of the cylinder D100. The above internal space can become a pressurization space DP. The pressurization space DP can be pressurized by the movement of the piston D200 located on the side of the second housing D120, thereby increasing the pressure. That is, when the above pressurization space DP is formed inside the cylinder D100, as the piston D200 moves towards the pressurization space DP, the volume of the pressurization space DP decreases, and the decreased volume causes the pressure to increase relatively.

[0119] Among them, the increased pressure can be determined within the range of 16 bar to 20 bar. Dry ice can be formed within the above pressure range. Of course, dry ice can be formed by the piston D200 pressurizing the pressurization space DP in a state where liquid-phase carbon dioxide or snow D10 is injected. The liquid-phase carbon dioxide or snow D10 can be injected through a supply hole formed on one side of the second housing D120.

[0120] Among them, in the case of liquid-phase carbon dioxide, it is received relatively uniformly while forming a horizontal plane, but in the case of snow D10, since it is formed of solid particles, it is difficult to stack relatively uniformly, for example, it is difficult to form a horizontal plane, etc., and a part may have a relatively large stacking amount. When the part with a large stacking amount is pressurized towards the pressurization direction with a flat pressurization surface, the part with a relatively small stacking amount is formed to have a higher density than the crimping part, and the part with a small stacking amount is formed to have a low density. This non-uniform density according to the stacking amount becomes a factor for reducing the continuous speed of the prepared dry ice.

[0121] To overcome this, in the case of the piston D200 to be described below, the pressurization surface is formed into a curved surface, so that when contacting the snow D10, the unevenly stacked snow D10 can be relatively evenly distributed while being crimped.

[0122] Figure 19A diagram showing the piston D200 according to an embodiment of the third aspect of the present invention.

[0123] Referring to Figure 19 , the piston D200 includes a rod D201 and a pressing plate D210 coupled to one end of the rod D201. The pressing surface of the pressing plate D210 includes a dispersed pressing portion D211 and a pressing end portion D212. The dispersed pressing portion D211 is a surface formed by a curved surface and may be formed to protrude in the pressing direction. An example shows a form in which the curved surface is formed laterally based on the pressing direction, but the curved portion of the pressing surface is not limited thereto. As long as it is a type in which a curved portion protruding in the pressing direction is formed, its shape is not limited. For example, it may be a form protruding in a hemispherical shape. Of course, preferably, it may be a pressing surface of a curved plane type as shown in the figure.

[0124] With this shape, during pressing, due to the protruding shape, there is a high possibility that the position closest to the pressing direction first contacts the snow D10, and the snow D10 may be pushed to the peripheral portion D11d by the dispersed pressing portion D211 of the curved surface to be dispersed. In the dispersion and pressing directions, the dispersion amount may increase as the curvature of the dispersed pressing portion D211 increases. This can push the snow D10 in a direction perpendicular to the curved surface in the dispersion direction of the snow D10 to disperse the snow D10 from the most protruding position of the dispersed pressing portion D211 to both sides. Of course, this is based on the illustrated description. In the case where the dispersed pressing portion D211 is provided to protrude in a hemispherical shape including a curved portion, the snow D10 can be dispersed radially from the most protruding position in the dispersion direction.

[0125] That is, even when the shape of the dispersed pressing portion D211, which is a structure for dispersing the snow D10, changes on the premise of including a curved portion, preferably, the most protruding position is located at the center of the pressing surface, and the snow D10 can be dispersed from the center to the peripheral portion D11d such as both sides or radially around the center.

[0126] When the snow D10 is dispersed through the above-described dispersion process of the snow D10, the continuous pressing of the piston D200 in the pressing direction can press the dispersed snow D10. This is through contact pressing, and the snow D10 can be molded while increasing its density.

[0127] That is, the dispersed pressing portion D211 having a curved surface shape in the pressing portion of the piston D200 can disperse and then press the snow D10, thereby enabling the preparation of dry ice blocks D11 with uniform density.

[0128] Figure 20 A diagram showing the piston D200 according to an embodiment of the third aspect of the present invention moving in the pressing direction.

[0129] Referring to Figure 20, the piston D200 can pass through the first pressurization section DS1 and move to the second pressurization section DS2. Since the supply of snow D10 can be completed before the piston D200 moves, an increased pressure can be transmitted to the snow D10 according to the movement of the piston D200. The piston D200 can pressurize the snow D10 via the first pressurization section DS1 formed inside the second housing D120 and through the second pressurization section DS2 formed inside the first housing D110.

[0130] On the other hand, since no separate process such as leveling is performed on the snow D10 after it is provided inside the cylinder D100, the amount of snow D10 accumulated in each part on the support frame D300 may vary. When the snow D10 with different accumulation amounts is pressurized by the pressure plate D210, the part with a large accumulation amount forms a high density, while the part with a small accumulation amount forms a low density. The gasification rate of the part with an excellent low density is relatively high, so it may be unevenly gasified, which may be the reason for promoting the gasification speed of the overall dry ice block D11.

[0131] To prevent this, a dispersion pressurization part D211 that can disperse the curved surface of the snow D10 is provided. The dispersion pressurization part D211 increases the pressure and disperses the uneven accumulation state of the snow D10 by contacting the snow D10, so that the snow D10 can be dispersed in a form corresponding to the molding shape. This is a pretreatment that can prepare the dry ice block D11 with uniform density by crimping and molding the snow D10 in contact with the dispersion pressurization part D211. This is performed by the dispersion pressurization part D211 of the pressure plate D210.

[0132] Furthermore, when the pressurizing end D212 is located at at least both ends of the dispersion pressurization part D211 and the dispersion pressurization part D211 ejects in a hemispherical shape, the pressurizing end D212 can be annular. That is, as long as the above conditions are met, the shape is not limited to a specific shape.

[0133] The pressurizing end D212 is formed by a plane and is formed along a direction parallel to the pressurization direction so as to be able to more effectively gather the snow D10 dispersed to the side by the dispersion pressurization part D211. Thus, before the snow D10 moving to the side by the dispersion pressurization part D211 moves to the area pressurized by the pressurization end face, the side of the pressurizing end D212 is in a pressurized state, so the moving snow D10 cannot move into the moving direction of the pressurizing end D212 with a relatively high density. That is, the snow D10 is pressurized by the dispersion pressurization part D211, and the snow D10 located on the front side in the pressurization direction of the dispersion pressurization part D211 can be crimped within the above front side range after contacting the dispersion pressurization part D211.

[0134] Figure 21 A diagram showing the dry ice block D11 generated by the dry ice block D11 preparation device according to an embodiment of the third aspect of the present invention.

[0135] Figure 21 As an example of the dry ice block D11 prepared by the above-described dry ice block D11 preparation device, the dry ice block D11 includes: a curved surface portion D11a that is pressed by a dispersion pressurizing portion D211 including a curved portion; and a flat surface portion D11b that is formed by a pressurizing end portion D212. Preferably, in the dry ice block D11, the density of the central portion D11c and the peripheral portion D11d is the same, and they may be the same when comparing any part per unit volume. Compared with the density difference between any parts in the non-uniform dry ice block D11, this can at least result in an improvement in terms of uniformity. This result delays the gasification rate of the dry ice block D11, so that compared with the flat dry ice block D11 prepared with the same amount of snow D10, a dry ice block D11 that can be used for a long time can be prepared.

[0136] The representative embodiments of the present invention have been described in detail above, but those of ordinary skill in the technical field to which the present invention pertains can understand that various modifications can be made to the above embodiments without departing from the scope of the present invention. Therefore, the scope of the rights of the present invention should not be limited to the described embodiments, but should be defined by the scope of the invention claimed below and its equivalent technical solutions.

Claims

1. A dry ice block preparation device, characterized in that, Dry ice is prepared by pressurizing the liquefied carbon dioxide in the snow state that is phase-changed by spraying liquefied carbon dioxide. The dry ice block preparation device includes: a support base, which is fixed to the ground and extends upward, and includes a support plate at the end on the upper side; A first housing, which can reciprocate along the extension surface of the support base in the direction extending toward the support base; A second housing, which forms a hermetically sealed compression space when it comes into contact with the first housing when the first housing moves upward, and is formed with a supply hole connected to a supply line to be able to supply liquid-phase carbon dioxide to the compression space; and A pressurizing piston, which penetrates the second housing and can reciprocate in the compression space, The pressurizing piston descends, so that the pressure in the compression space is determined within the range of 16 bar to 20 bar.

2. The dry ice block preparation device according to claim 1, wherein, In the compression space, while the pressurizing piston approaches the support plate, the liquid-phase carbon dioxide is pressurized.

3. The dry ice block preparation device according to claim 1, characterized in that, The second housing and the support base are fixed and are driven by the reciprocating movements of the first housing and the pressurizing piston.

4. The dry ice block preparation device according to claim 1, wherein A groove is formed on the surface of the first housing that contacts the second housing, and the first housing includes a sealing portion disposed in the groove, The second housing includes a protrusion formed of a metal material on the surface that contacts the first housing, and the protrusion has a shape corresponding to the sealing portion.

5. A method for preparing dry ice blocks, characterized in that, Prepared by the dry ice block preparation device according to claim 1.

6. The dry ice preparation method according to claim 5, wherein It includes: A first housing moving step, in which the first housing moves upward along the extension direction of the support base fixed to the ground and comes into contact with the second housing; A compression space forming step, in which an airtight state is maintained inside the first housing and the second housing that are communicated through the movement of the first housing; A liquid-phase carbon dioxide injecting step, in which liquid-phase carbon dioxide is injected into the compression space formed in the compression space forming step; A pressurizing step, in which the pressurizing piston connected to the second housing moves in the pressurizing direction toward the support base direction and pressurizes the liquid-phase carbon dioxide injected in the liquid-phase carbon dioxide injecting step; A returning step, after the pressurizing step, the pressurizing piston and the first housing return; and A discharging step, after the returning step, discharging the dry ice in which the state of the pressurized liquid-phase carbon dioxide has changed, In the compression space, while the pressurizing piston approaches the support plate, the liquid-phase carbon dioxide is pressurized. The pressurizing piston descends, so that the pressure in the compression space is determined within the range of 16 bar to 20 bar.

7. The dry ice block preparation method according to claim 6, characterized in that, When the pressing force of the pressurizing piston acts in the direction toward the support base, the pressing force is supported by the reaction of the support base fixed to the ground.

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