KR102596672B1 - Refrigerator for grain having improved cooling efficiency by cooling aid material - Google Patents

Abstract

The present invention prevents external moisture and heat from entering the grain storage unit by filling the walls of the grain storage unit with salt, thereby reducing the cooling efficiency due to the moisture and heat flowing in from the outside, thereby reducing the temperature of the grain stored inside the grain storage unit. It is possible to prevent quality from deteriorating, and the internal space of the cooling unit is filled with cooling auxiliary materials. In the case of cooling auxiliary materials, the heat capacity and thermal conductivity are high, so the cooling efficiency of the cooling unit increases, which not only increases cooling efficiency. , even if the current supplied to the cooling unit is cut off, cold air can be maintained for a certain period of time, allowing the temperature inside the grain storage bin to be cooled to the preset temperature without installing an additional cooling device, thereby eliminating the need to install a separate cooling device. Since there is no need to do so, not only does the overall volume of the grain refrigerator decrease, but also the cost decreases, and the rotary bin installed at the bottom of the grain storage bin is configured to have a constant discharge volume, allowing the user to obtain a certain amount of grain without separate weighing. When the moisture formed in the internal space of the cooling unit is discharged to the outside, the discharged moisture is configured to be discharged along the heat sink structure in a heated state, so that the discharged moisture is heated by the heat sink structure and discharged in a gaseous state to separate This relates to a grain refrigerator that can reduce its volume because it does not require installing a means for discharging moisture.

Description

Grain refrigerator with improved cooling efficiency filled with cooling aid material {Refrigerator for grain having improved cooling efficiency by cooling aid material}

The present invention relates to a grain refrigerator with improved cooling efficiency by being filled with a cooling auxiliary material. Specifically, the cooling efficiency is prevented from being reduced due to external humidity by filling the inside of the outer wall of the grain storage bin with salt, and the inside of the cooling unit is filled with salt. This relates to a grain refrigerator with improved cooling efficiency by being filled with a cooling auxiliary material that increases thermal conductivity and heat capacity and can increase the cooling efficiency of the cooling unit.

In general, grains such as rice, brown rice, barley, beans, and red beans were stored in rice containers, jars, etc. in places not exposed to sunlight, or stored in refrigerators.

However, when grains are stored outside, they are affected by external humidity. When humidity is high, pests or molds occur, and when humidity is low, moisture inside the grain is discharged to the outside, deteriorating the grain's texture and taste. A problem arises.

Additionally, when grains are stored in the refrigerator, there is a problem of food smells permeating into the refrigerator.

To solve this problem, Domestic Registered Utility Model No. 20-0390039 (Title of invention: Cooling device for grain refrigerator) (hereinafter referred to as ‘prior art’) was developed.

Figure 1 is a perspective view of the prior art.

As shown in Figure 1, the prior art 100 consists of a cooling post 110, a housing 120, a heater wire 130, a heat dissipation fin 140, and a cooling fan 150.

The cooling post 110 is formed in a cylindrical shape and is made of a material with excellent thermal conductivity.

Additionally, a Peltier element 111 is attached to the lower surface of the cooling post 110.

When an electric current flows through the Peltier element 111, one side is cooled and the other side is heated.

The cooled side of the Peltier element 111 is attached to the cooling post 110 to transmit cold air to the cooling post 110, and the heated side is attached to the heat dissipation fin 140 to emit heat to the outside.

The housing 120 is installed to surround the cooling post 110 and transmits cold air emitted from the cooling post 110 to the grain.

In addition, the housing 120 is made of a material that is breathable and capable of absorbing moisture, such as red clay or charcoal, and can prevent grains from being exposed to moisture by absorbing moisture that may be generated during the cooling process.

The heater wire 130 is installed in the space between the cooling post 110 and the housing 120, and the humidity inside the housing 120 exceeds the threshold by a humidity sensor (not shown) installed inside the housing 120. In this case, it is determined that moisture has formed on the outer surface of the cooling post 110 due to condensation, and the moisture formed on the outer surface of the cooling post 110 is removed using heat.

One surface of the heat dissipation fin 140 is in contact with the Peltier element 111, and radiates heat transferred through the Peltier element 111 to the outside.

The cooling fan 150 is installed on the heat dissipation fin 140 and discharges heat from the heat dissipation fin 140 to the outside.

In the grain refrigerator to which the prior art (100) is configured as described above, the grains inside are cooled through the cooling post (110) and the housing (120), and moisture inside the housing (120) is removed through the heater wire (130). By doing so, it is possible to prevent moisture inside the housing 120 from leaking to the outside and rotting or damaging the grain.

However, the cooling means of this prior art (100) increases cooling efficiency when the cooling post (110) and the housing (120) are attached, but the housing (120) is supercooled and condensation occurs on the outer peripheral surface of the housing (120). Problems arise where grains stored in grain silos rot or become damaged.

As a result, the cooling post 110 and the housing 120 are installed spaced apart from each other, and the transfer of cold air from the cooling post 110 is delayed due to the air between the cooling post 110 and the housing 120, thereby reducing cooling efficiency. and the cooling rate decreases.

In addition, since the cooling means of the prior art (100) does not have a separate means for increasing cooling efficiency, when the external temperature is high, the temperature inside the grain refrigerator cannot be cooled to the preset temperature, so the grains stored inside the grain refrigerator are not cooled smoothly. Problems arise that make it impossible to do so.

As a result, the cooling device of the prior art (100) must install a separate forced cooling means in the heat dissipation part to cool the grain refrigerator to a preset temperature, which not only increases the overall volume of the grain refrigerator but also increases the cost.

In addition, the grain refrigerator to which the prior art (100) is applied removes moisture by heating through the heater wire (130) in order to remove frost, etc. inside the housing, so the temperature of the housing (120) increases in the process of removing moisture. As a result, the temperature inside the grain refrigerator rises, causing the problem that the quality of grain stored inside deteriorates.

In addition, since the grain refrigerator to which the prior art (100) is applied does not have a separate means to control the amount of grain discharged from the grain refrigerator, the user additionally proceeds with the process of weighing the grain discharged from the grain refrigerator, thereby discharging the grain. The time taken increases.

In addition, since the grain refrigerator to which the prior art (100) is applied has no means to prevent moisture from flowing in from the outside, when the outside humidity increases, the cooling efficiency is reduced due to the moisture flowing inside, causing the temperature inside the grain storage unit to rise. As the temperature does not drop to the set temperature, the quality of the grain stored inside the grain storage unit deteriorates.

The present invention is intended to solve this problem. Salt is filled inside the outer wall of the grain storage bin to prevent moisture from entering the grain storage bin, and at the same time, external heat is prevented from flowing into the inside, thereby preventing moisture flowing in from the outside. This relates to a grain refrigerator that can prevent cooling efficiency from being reduced.

In addition, another problem solved by the present invention is that the internal space of the cooling unit is filled with a cooling auxiliary material, and in the case of the cooling auxiliary material, the heat capacity and thermal conductivity are high, so the cooling efficiency of the cooling unit is increased, so that there is no need to install a separate cooling device. This relates to a grain refrigerator that can cool the temperature inside a grain storage bin to a preset temperature.

In addition, another problem solved by the present invention relates to a grain refrigerator that can discharge a desired amount of grain without separate measurement by being configured to have a constant discharge amount of a rotary bin installed at the bottom of the grain storage bin.

In addition, another problem solved by the present invention is a grain refrigerator that is configured to discharge moisture formed in the internal space of the cooling unit to the outside, so that the discharged moisture is discharged along the heat sink structure in a heated state, thereby allowing moisture to be discharged in a gaseous state. It's about.

The solution of the present invention for solving the above problem is a case, a grain storage unit installed inside the case and formed in a cylindrical shape with an open top to store grain therein, and grain stored in the grain storage unit. In the grain refrigerator consisting of a cooling unit for cooling: a cooling rod whose upper end penetrates the bottom surface of the grain storage unit and protrudes into the grain storage unit, wherein the lower end of the cooling unit is located lower than the bottom surface of the grain storage unit; Cooling means installed on the lower surface of the cooling rod to cool the cooling rod; a heat sink structure installed on the lower surface of the cooling means to radiate heat from the cooling means to the outside; A filling portion installed to surround the cooling rod and filled with a cooling auxiliary material; It is formed in the shape of a circular tube with a closed upper part, and includes a cooling pipe body installed to surround the filling part. The outer peripheral surface of the cooling rod is formed in a funnel shape and is installed at an angle adjacent to the lower end of the cooling rod, and the inner edge is A water receiving plate is installed to be connected to the outer peripheral surface of the cooling rod and has a water outlet through which moisture is discharged at the lowest height. The heat sink structure is formed in a flat shape and is installed on the lower surface of the cooling means. A heat dissipation frame in which water discharge holes penetrating the upper and lower surfaces are formed at positions corresponding to the water discharge holes of the plate; It is formed in a flat shape and includes heat sinks installed perpendicularly to the lower surface of the heat dissipation frame, and the cooling unit allows moisture generated in the internal space, which is a space formed between the cooling rod and the cooling pipe body, to flow through the water outlet of the water receiving plate. An opening and closing door that discharges water to the outside through the water discharge hole, and the water discharge hole is installed at the lower end; It includes electrodes installed to be spaced apart from each other on the inner peripheral surface, and the opening/closing door is closed in normal times to prevent heat from the heat sink structure from flowing into the internal space. However, when more than a certain amount of moisture accumulates in the water outlet, the electrodes are exposed to moisture. It is energized by and opens the door.

In addition, in the present invention, the cooling auxiliary material is preferably prepared by mixing 6 to 12% by weight of acetic acid, 40 to 50% by weight of salt, and 40 to 50% by weight of water.

In addition, in the present invention, it is preferable that the interior of the outer walls of the grain storage unit is filled with a moisture absorbent.

Additionally, in the present invention, the moisture absorbent is preferably salt from which the bittern has been removed.

Additionally, in the present invention, the cooling pipe body is preferably formed of red clay material with added salt.

In addition, in the present invention, it is preferable that salt is plated on the inner and outer peripheral surfaces of the cooling pipe body.

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In addition, in the present invention, the grain storage unit is formed in a barrel shape with an open top, and includes a grain storage bin with a grain discharge port formed on the bottom. It is formed in the shape of a circular tube with one end closed, and a first opening and a second opening penetrating the outer peripheral surface and the inner peripheral surface are formed in the longitudinal direction and are formed to face each other, and the grain is formed so that the first opening communicates with the grain discharge port. A rotating barrel housing installed at the lower part of the storage tank; It is formed in the shape of a circular tube with both ends closed, and a third opening penetrating the inner and outer peripheral surface is formed in the longitudinal direction and includes a rotary tube rotatably installed inside the rotary tube housing, and the rotary tube is configured to rotate when installed. It is preferable that a locking protrusion located inside the second opening of the traditional housing is formed on the outer peripheral surface so that the rotation angle is limited by the locking protrusion.

According to the present invention, which has the above problems and solutions, salt is filled inside the walls of the grain storage section to prevent external moisture and heat from entering the grain storage section, thereby reducing cooling efficiency due to moisture and heat flowing in from the outside. It is possible to prevent the quality of grain stored inside the grain storage unit from deteriorating.

In addition, according to the present invention, the internal space of the cooling unit is filled with a cooling auxiliary material, and the cooling auxiliary material has high heat capacity and thermal conductivity, which not only increases the cooling efficiency of the cooling unit, but also increases the current supplied to the cooling unit. Even if the refrigerator is shut off, cold air can be maintained for a certain period of time, allowing the temperature inside the grain storage bin to be cooled to the preset temperature without the need to install an additional cooling device. As a result, there is no need to install a separate cooling device, so the entire grain refrigerator can be cooled. Not only does the volume decrease, but the cost also decreases.

In addition, according to the present invention, the rotary bin installed at the bottom of the grain storage bin is configured to have a constant discharge amount per time, so that the user can obtain a constant amount of grain without separate measuring.

In addition, according to the present invention, when the moisture formed in the internal space of the cooling unit is discharged to the outside, the discharged moisture is discharged along the heat sink structure in a heated state, so that the discharged moisture is heated by the heat sink structure and discharged in a gaseous state. The volume can be reduced because there is no need to install a separate moisture discharge means.

Figure 1 is a perspective view of the prior art.
Figure 2 is an exploded perspective view of the grain refrigerator of the present invention.
Figure 3 is a cross-sectional view of Figure 2.
Figure 4 is an exploded perspective view of the grain storage part of Figure 2.
Figure 5 is an example diagram to explain the grain withdrawal process from the grain refrigerator.
Figure 6 is an exploded perspective view of the cooling part of Figure 2.
Figure 7 is a cross-sectional view of the cooling part of Figure 2.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

Figure 2 is an exploded perspective view of the grain refrigerator of the present invention, and Figure 3 is a cross-sectional view of Figure 2.

As shown in Figures 2 and 3, the grain refrigerator (1) consists of a case (2), a grain storage unit (3), a cooling unit (4), an insulation block (5), and a grain discharge bin (6).

The case (2) is formed in the shape of a box with an open top, and a grain storage unit (3), a cooling unit (4), an insulation block (5), and a grain discharge bin (6) are installed inside.

At this time, in FIG. 2, for convenience of explanation, the shape of the case 2 is illustrated as being in the shape of a square pillar. However, the shape of the case 2 is not limited to this and can be formed in various shapes such as a cylinder, a polygonal pillar, etc. there is.

Additionally, a discharge bin insertion hole into which the grain discharge bin 6 is inserted is formed on one side of the case 2.

Figure 4 is an exploded perspective view of the grain storage part of Figure 2.

The grain storage unit (3) consists of a grain storage container (31), a rotating container housing (32), a rotating container (33), a rotating shaft (34), and a handle (35).

The grain storage bin 31 is formed in the shape of a box with an open top, and the lower surface is formed to slope downward from one side wall toward the other side wall, which is a wall facing each other.

Additionally, salt (not shown) is filled inside the side walls of the grain storage bin 31. At this time, it is preferable that the salt filled is salt from which the bittern has been removed.

When the outside of the grain storage bin 31 is hot and humid, the salt (S) filled inside the side walls of the grain storage bin 31 absorbs moisture flowing in from the outside and prevents the grains inside from being deteriorated by moisture. At the same time, cooling efficiency is reduced due to moisture, thereby preventing the temperature inside the grain storage bin 31 from increasing.

In addition, since the salt (S) has a lower thermal conductivity than the side walls of the grain storage bin 31, it has a warming effect by preventing external heat from entering the grain storage bin 31 or internal cold air from being discharged to the outside. The inflow of external heat is blocked and the internal cold air is preserved, thereby increasing cooling efficiency.

Even if the grain storage bin 31 configured in this way is installed in a place with high temperature and humidity, it absorbs moisture by salt (S) and prevents the grain (G) stored inside from being exposed to moisture, so that the internal temperature is maintained at a preset temperature. It is prevented from rising further and the grains (G) stored inside can be prevented from deteriorating.

In addition, the salt (S) prevents external heat from entering the grain storage bin (31) and at the same time prevents internal cold air from being discharged to the outside, so that even when the external temperature is high, the grain storage bin (31) is kept inside the grain storage bin (31). Cooling of the stored grain (G) can be performed smoothly.

At this time, it has been described as an example that the salt (S) is filled inside the side walls of the grain storage bin 31, but the position where the salt (S) is filled is not limited to this, and can also be filled inside the bottom plate.

In addition, a cooling unit through-hole 311 through which the cooling unit 4 penetrates is formed at the center of the lower surface adjacent to the other side wall of the grain storage bin 31.

In addition, the grain storage bin 31 has a circular tube-shaped rotating bin housing 32 installed at the lower part of the grain discharge port 312.

The rotary tube housing 32 is formed in the shape of a circular tube with one end closed, and a first opening 321 and a second opening 322 penetrating the outer peripheral surface and the inner peripheral surface are formed in the longitudinal direction, but are formed to face each other.

At this time, the rotary bin housing 32 is installed so that the first opening 321 communicates with the grain discharge port 312 of the grain storage bin 31.

In addition, the rotary tube 33 is installed inside the rotary tube housing 32 to be rotatable by the rotary shaft 34.

The rotating tube 33 is formed in the shape of a circular tube with both ends closed, and a third opening 331 penetrating the inner and outer peripheral surfaces is formed in the longitudinal direction.

Additionally, a locking protrusion 332 is connected to the outer peripheral surface of the rotary tube 33.

The rotating shaft 34 is installed to penetrate the rotating cylinder housing 32, the rotating cylinder 33, and the case 2, and a handle 35 is coupled to an end protruding outward from the case 2.

At this time, the rotary shaft 34 is rotatably installed in the rotary barrel housing 32, and is coupled to the rotary barrel 33 so that the rotary barrel 33 can rotate within the rotary barrel housing 32.

Additionally, the rotating shaft 34 allows the user to rotate the rotating cylinder 33 from the outside through the handle 35 installed at the end.

Figure 5 is an example diagram to explain the grain withdrawal process from the grain refrigerator.

As shown in FIG. 5, the rotary drum 33 is arranged to close the first opening 321 of the housing 32 in normal times, so that the grains G stored inside the grain storage bin 31 are stored in the rotary drum 33. Flow inside is blocked. As a result, the grain (G) is stored in a cooled state by the cooling unit (4) inside the grain storage bin (31).

In addition, when the rotating bin 33 is rotated clockwise by the handle 35, the third opening 331 is arranged to face the first opening 321 so that the grains G inside the grain storage bin 31 are rotated. Although the grain flows into the inside of the tray, the curved portion closes the second opening 322 of the rotary barrel housing 32 to block the grain G from being discharged into the grain discharge container 6.

In this state, when the rotary bin 33 is rotated counterclockwise by the handle 35, the grain discharge port 312 is closed by the curved portion and the inflow of grains G into the grain storage bin 31 is blocked. At the same time, the third opening 331 is arranged to face the second opening 322 of the rotary barrel housing 32, so that the grains G inside the rotary barrel 33 are discharged into the grain discharge container 6.

At this time, the amount of grain (G) discharged at one time is limited to the internal volume of the rotary drum (33).

In addition, when the rotary tube 33 rotates, the locking protrusion 332 connected to the outer peripheral surface contacts the rotary tube housing 32, so that the rotation angle is limited and rotated within a specified range.

In the grain storage unit 3 configured in this way, the grains G are located in the grain storage bin 31 in normal times and are kept in a cooled state by the cooling unit 4, and when the user rotates the handle 35, Only the grains (G) in the grain storage bin (31) are discharged into the grain discharge bin (6).

At this time, the amount of grain (G) discharged from the grain storage bin (31) is limited to the internal volume of the rotary bin (33), so that the user can discharge a certain amount of grain (G) each time the handle (35) is rotated. .

As a result, users can withdraw a set amount of grain (G) without separate measurement.

Figure 6 is an exploded perspective view of the cooling part of Figure 2, and Figure 7 is a cross-sectional view of the cooling part of Figure 2.

As shown in FIG. 6, the cooling unit 4 includes a cooling rod 41, a heat sink structure 42, a cooling fan 43, and a cooling conduit body 44. It consists of a filling part (45) and a mesh network (46).

The cooling rod 41 is formed in a circular rod shape and is made of a material with excellent thermal conductivity.

Additionally, a Peltier element 411 is attached to the lower surface of the cooling rod 41.

The Peltier element 411 is a device that operates on the principle that when a current flows, one side is cooled and the other side is heated.

One side of this Peltier element 411 is attached to the lower surface of the cooling rod 41 to cool the cooling rod 41, and the other side is attached to the upper surface of the heat sink structure 42 to heat the heat sink structure 42.

Additionally, a water receiving plate 412 is installed on the outer peripheral surface of the cooling rod 41 adjacent to the lower end.

The water receiving plate 412 is formed in a funnel shape and is installed at an angle adjacent to the lower part of the cooling rod 41.

At this time, the inner edge of the water receiving plate 412 is installed to be connected to the outer peripheral surface of the cooling rod 41.

In addition, the outer edge of the water receiving plate 412 is installed so as to contact the inner peripheral surface of the cooling conduit body 44 when installed.

In addition, the water receiving plate 412 is formed at the lowest height, and a funnel-shaped water outlet 4121 through which moisture is discharged is formed to protrude downward at a location where moisture collects by gravity.

At this time, the water outlet 4121 is installed so that its lower end is in contact with the heat sink structure 42 and at the same time communicates with the water outlet hole 4211 formed in the heat dissipation frame 421.

Additionally, an opening/closing door (41211) is installed at the lower end of the water outlet (4121).

Additionally, a pair of electrodes 41212 are installed on the inner surface of the water outlet 4121 to be spaced apart from each other.

At this time, the electrodes 41212 open the door 41211 only when they are energized.

These electrodes (41212) are installed spaced apart from each other in normal times and do not conduct electricity, but when moisture collects on the upper part of the door (41211) and reaches the electrodes (41212), the moisture conducts electricity to each other, causing the door (41211) to open. Moisture is released by opening.

For this reason, the opening/closing door 41211 is closed in normal times to prevent heat from rising from the heat sink structure 42, and is opened only when moisture is discharged, so that heat from the heat sink structure 42 flows into the internal space 441. This can prevent cooling efficiency from decreasing.

When the cooling rod 41 is cooled and condensation occurs in the water receiving plate 412, moisture is discharged to the outside through the water outlet 4121 and the water outlet hole 4211.

The heat sink structure 42 consists of a flat heat dissipation frame 421 to which the Peltier element 411 is attached to the upper surface, and a plurality of flat heat dissipation plates 422 vertically coupled to the lower surface of the heat dissipation frame 421. .

This heat sink structure 42 receives heat generated from the Peltier element 411 through the heat dissipation frame 421 and releases the heat into the atmosphere through the heat sinks 422.

Additionally, a water discharge hole 4211 is formed through the heat dissipation frame 421 from the top to the bottom.

When the water discharge hole 4211 is installed, the upper end is formed at a position corresponding to the water discharge hole 4121, and the lower end is formed toward one of the heat sinks 422.

This water discharge hole 4211 causes moisture flowing in through the water discharge hole 4211 to move downward along the heat sink 422.

At this time, since the heat sink 422 is heated by the heat of the Peltier element 411, when moisture moves downward along the heat sink 422, it is evaporated and changes into water vapor.

As a result, the grain refrigerator (1) reduces the size and cost of the grain refrigerator (1) because the moisture generated in the cooling unit (4) is discharged to the outside in the form of water vapor, eliminating the need to install a separate moisture discharge means.

The cooling fan 43 is installed at the bottom of the heat sink structure 42, and by cooling the heat sink structure 42, the heat from the Peltier element 411 is discharged to the outside more quickly, thereby facilitating the cooling process of the cooling rod 41. Make sure it can be done.

The cooling conduit body 44 is formed in the shape of a circular tube with a closed top, and is made of red clay. The occurrence of mold can be suppressed by adding salt to the interior during the manufacturing process.

At this time, for the convenience of explanation, the cooling pipe body 44 is described as being made of red clay as an example, but the manufacturing material of the cooling pipe body 44 is not limited to this and can be made of various types of materials such as charcoal and ceramic. .

In addition, salt is plated on the inner and outer peripheral surfaces of the cooling conduit body 44 to prevent mold from forming due to the salt plated on the inner and outer surfaces, and at the same time, moisture generated inside the cooling conduit body 44 is prevented from being released to the outside.

For example, when the power of the cooling unit 4 is cut off or turned off, the internal temperature increases, and moisture is generated on the outer circumferential surface due to the increase in temperature. At this time, in the case of a conventional grain refrigerator, mold occurs in the cooling pipe 44 due to moisture.

On the other hand, when manufacturing the cooling pipe body 44 of the grain refrigerator 1, salt is added to the interior and salt is plated on the inner and outer peripheral surfaces, thereby reducing the occurrence of mold.

In addition, the cooling pipe body 44 has an inner diameter larger than the outer diameter of the cooling rod 41, and is formed so that the inner peripheral surface is in contact with the end of the water receiving plate 412, so that when installed, it is spaced apart from the outer peripheral surface of the cooling rod 41, thereby creating an internal space. (441) is formed.

At this time, the filling part 45 is installed in the inner space 441 on the upper part of the water receiving plate 412 as shown in FIG. 7.

The filling part 45 is formed in the shape of a hollow cylinder with a closed upper end and is installed in the internal space 411 to surround the cooling rod 41, and the inside is filled with a cooling auxiliary material.

At this time, the filling part 45 is configured to be separated on the inside by a plurality of partition walls (not shown), thereby preventing the cooling auxiliary material from being unevenly distributed and the cooling pipe 44 from being unevenly cooled.

The cooling auxiliary material consists of 6 to 12% by weight of acetic acid, 40 to 50% by weight of salt, and 40 to 50% by weight of water.

At this time, the solubility of salt in water at a temperature of 20℃ is 36g/100ml. In other words, because salt is added in an amount greater than the solubility of water, salt is precipitated inside the cooling auxiliary material.

When acetic acid is absorbed into water, the heat capacity and specific heat of these cooling auxiliary substances increase because acetic acid and water form hydrogen bonds.

In addition, the thermal conductivity of the cooling auxiliary material increases due to salt dissolved in water and salt precipitated.

In other words, because the heat capacity of the cooling auxiliary material increases due to acetic acid, the amount of energy required for temperature change increases, allowing the temperature of the filling part 45 to be maintained at a preset temperature even when external heat is introduced. In addition, because the cooling auxiliary material increases thermal conductivity due to the salt contained therein, the cold air generated from the Peltier element 411 attached to the lower surface of the cooling rod 41 is quickly transferred to the cooling pipe 44, so the grain storage bin (31) The interior can be cooled quickly.

This not only reduces the amount of temperature increase in the filling part 45 due to heat flowing in from the outside, but also increases cooling efficiency because the cold air delivered from the Peltier element 411 is quickly dispersed throughout the cooling conduit body 44. .

In addition, because the cooling auxiliary material has a large heat capacity, when the power is cut off or turned off, the rate of increase in temperature is reduced, preventing food from being damaged for a long period of time.

At this time, the inner peripheral surface of the filling part 45 is in contact with the cooling rod 41, and the outer peripheral surface is in contact with the cooling pipe body 44.

This filling part 45 is cooled by the cooling rod 41 in contact with the inner peripheral surface, and the cold air delivered from the cooling rod 41 is transferred to the cooling pipe body 44 in contact with the outer peripheral surface to cool the cooling pipe body 44. I order it.

The mesh network 46 is formed in the shape of a cylindrical tube with a closed top, and is installed so that the cooling conduit body 44 is built into it.

In addition, the mesh network 46 is formed with a plurality of through holes penetrating the inner and outer peripheral surfaces.

At this time, the through holes are formed to be smaller than the grains introduced into the grain storage bin 31 to prevent the grains from being supercooled by direct contact with the cooling pipe body 44.

The cooling unit (4) configured in this way includes a cooling rod (41), a cooling tube body (44), a filling part (45), and a mesh net (46) inserted into the cooling unit through hole (312) formed in the grain storage bin (31). This cools the grain stored inside the grain storage bin (31).

At this time, the cooling unit 4 reduces the moisture and heat flowing in from the outside of the grain storage bin 31 by the salt (S) filled inside the side walls, so the cooling efficiency increases and the range of temperature that can be cooled increases. .

In addition, the cooling unit 4 not only transfers the cold air of the cooling rod 41 quickly to the cooling conduit body 44 because the cooling auxiliary material filled inside the filling unit 45 has high thermal conductivity, but also has a high heat capacity. Therefore, it is possible to prevent the temperature from increasing due to external heat, and when the operation of the cooling unit (4) is stopped, the rate at which the temperature inside the grain bin (31) increases is reduced, so when the power is cut off or turned off. , the temperature inside the grain storage bin 31 increases, thereby preventing grains stored inside from deteriorating or developing mold.

In addition, the cooling unit 4 can discharge moisture generated inside the cooling unit 4 to the outside without installing a separate moisture absorption device or cooling means, and can also cool to a preset temperature, thereby reducing costs. The volume of the device is reduced.

In addition, the cooling unit 4 is configured so that moisture generated inside is discharged to the outside by the water receiving plate 412 formed on the cooling rod 41, and the discharged moisture is vaporized by the heat of the heat sink structure 42, thereby providing a separate Since there is no need to prepare moisture discharge processes or tools, volume and cost are reduced.

The following [Table 1] shows the operation of the cooling unit (4) when different materials are filled inside the filling unit (45) with the external temperature being 25°C and the cooling temperature set to 5°C. This is a measurement of the temperature inside the grain storage bin 31, which changes accordingly.

0h 4h 8h 12h 16h 20h 24h 28h 32h 36h Example 1 25.0 21.9 19.0 16.2 13.6 11.0 8.2 5.0 5.0 5.0 Example 2 25.0 21.7 18.6 15.9 13.4 11.2 10.0 10.0 10.0 9.9 Comparative Example 1 25.0 23.3 21.8 20.5 19.4 18.4 17.5 16.8 16.0 16.0

* Unit is ℃.

At this time, the internal space of the filling part 45 is 600mL.

Example 1 is a grain refrigerator in which the inside of the filling unit 45 is filled with a cooling auxiliary material.

Example 2 is a grain refrigerator in which the filling portion 45 is filled with salt.

Comparative Example 1 is a grain refrigerator in which the interior of the filling unit 45 is filled with air.

Looking at Example 1 with reference to Table 1, in Example 1, the temperature inside the grain storage bin 31 continues to decrease, and after 24 to 28 hours, the set temperature of 5°C is reached, and the temperature maintain.

Additionally, in Example 2, the temperature inside the grain storage bin 31 continues to decrease, but reaches 10°C after 20 to 24 hours and the temperature is maintained.

On the other hand, in Comparative Example 1, the temperature inside the refrigerating compartment 3 continued to decrease, but reached 16°C after 28 to 32 hours, and the temperature could no longer decrease.

This Example 1 is filled with a cooling auxiliary material inside the filling part 45, so that the final cooling temperature is higher when compared to Example 2 and Comparative Example 1 in which the inside of the filling part 45 is not filled with a cooling auxiliary material. You can confirm that it is low.

Additionally, in Example 2, it can be confirmed that the internal temperature of the grain storage bin 31 cannot be reduced any further at 10.0°C.

In Example 2, the cooling rate is increased compared to Example 1 by filling the inside of the filling portion 45 with salt to increase thermal conductivity, but the cooling temperature is not reduced to the preset temperature because the heat capacity of the salt is lower than that of the cooling auxiliary material. Problems arise that make it impossible to do so.

In addition, in Comparative Example 1, the temperature inside the grain storage bin 31 could no longer decrease from 16°C, so the temperature inside the grain storage bin 31 was higher than in Example 1.

In Comparative Example 1, the air filled inside the filling part 45 acts as an insulator, so the cooling rate and cooling efficiency of the cooling pipe 44 are reduced, and the temperature inside the grain storage bin 31 cannot be reduced to the preset temperature. A problem arises.

As a result, the cooling unit 4 is cooled to the set temperature when the cooling auxiliary material is filled inside the filling unit 45, but when it is filled with only salt or air, it cannot be cooled to the preset temperature. You can check that.

That is, the cooling unit 4 is filled with a cooling auxiliary material inside the filling unit 45 as in Example 1, when the inside is filled with salt (Example 2) or with air (Comparative Example 1). Cooling efficiency increases compared to when

The following [Table 2] shows the measured temperature inside the grain storage bin 31 when the content of acetic acid added to the cooling auxiliary material changes while the external temperature is 25℃ and the cooling temperature is set to 5℃. am.

At this time, the cooling auxiliary material is made so that the ratio of water and salt is the same even if the acetic acid content changes.

0h 4h 8h 12h 16h 20h 24h 28h 32h 36h Example 3 25.0 21.9 19.0 16.2 13.6 11.0 8.2 5.0 5.0 5.0 Comparative example 2 25.0 22.2 19.5 17.0 14.6 12.3 10.0 10.0 9.9 10.0 Comparative example 3 25.0 22.7 20.7 18.9 17.1 15.3 13.9 12.7 12.0 12.0

* Unit is ℃.

At this time, the internal space of the filling part 45 is 600mL.

Example 3 is a grain refrigerator in which the inside of the filling unit 45 was filled with a cooling auxiliary material containing 10% by weight of acetic acid.

Comparative Example 2 is a grain refrigerator in which the inside of the filling part 45 was filled with a cooling auxiliary material containing 4% by weight of acetic acid.

Comparative Example 3 is a grain refrigerator in which a cooling auxiliary material containing 15% by weight of acetic acid was filled inside the filling unit 45.

Looking at Example 3 with reference to Table 2, in Example 2, the temperature inside the grain storage bin 31 continues to decrease, and after 24 to 28 hours, the set temperature of 5°C is reached, and the temperature maintain.

On the other hand, in Comparative Example 2, the temperature inside the grain storage bin 31 continued to decrease, but reached 10°C after 20 to 24 hours and the temperature was maintained.

Additionally, in Comparative Example 3, the temperature inside the grain storage bin 31 continued to decrease, but after 28 to 32 hours, it reached 12°C and the temperature was maintained.

Example 3 is a comparison of Comparative Example 2 with an acetic acid content of 4 wt% and 15 wt% of acetic acid when the cooling auxiliary material with an acetic acid content of 10 wt% is filled inside the filling portion 45. When compared to Example 3, it can be confirmed that the final cooling temperature of the grain storage bin 31 is lower.

In addition, it can be seen that in Comparative Example 2, the cooling rate of the grain storage bin 31 is slower than in Example 3, and the internal temperature cannot be reduced any further at 10°C.

In Comparative Example 2, the amount of acetic acid contained in the cooling auxiliary material filled inside the filling part 45 was reduced compared to the cooling auxiliary material in Example 3, so the heat capacity of the cooling auxiliary material was reduced, thereby reducing the influence of external temperature. Because it receives more, if the external temperature is high, a problem occurs in which the temperature inside the grain storage bin 31 cannot be cooled to the preset temperature.

In addition, in Comparative Example 3, the amount of acetic acid contained in the cooling auxiliary material filled in the filling part 45 was increased compared to the cooling auxiliary material in Example 3, so the heat capacity of the cooling auxiliary material increased, resulting in a Peltier element ( If 411) is used, a problem occurs in which the temperature cannot be reduced to the preset temperature.

As a result, it can be seen that the cooling efficiency of the cooling unit 4 decreases when the acetic acid content of the cooling auxiliary material filled in the filling unit 45 decreases or increases above a certain value.

The following [Table 3] shows the measured temperature inside the grain storage bin 31 when the content of salt added to the cooling auxiliary material was changed while the external temperature was 25°C and the cooling temperature was set to 5°C. am.

At this time, the cooling auxiliary material ensures that the ratio of water and acetic acid remains constant even if the salt content changes.

0h 4h 8h 12h 16h 20h 24h 28h 32h 36h Example 4 25.0 21.9 19.0 16.2 13.6 11.0 8.2 5.0 5.0 5.0 Comparative example 4 25.0 22.4 19.7 17.3 14.8 12.6 10.6 9.4 9.0 9.0 Comparative Example 5 25.0 22.8 20.6 18.3 16.3 14.4 12.7 11.2 11.0 11.0

* Unit is ℃.

At this time, the internal space of the filling part 45 is 600mL.

Example 4 is a grain refrigerator in which a cooling auxiliary material with a salt content of 45% by weight was filled inside the filling portion 45.

Comparative Example 4 is a grain refrigerator in which a cooling auxiliary material with a salt content of 30% by weight was filled inside the filling portion 45.

Comparative Example 5 is a grain refrigerator in which a cooling auxiliary material with a salt content of 60% by weight was filled inside the filling portion 45.

Looking at Example 4 with reference to Table 3, in Example 4, the temperature inside the grain storage bin 31 continues to decrease, and after 24 to 28 hours, the set temperature of 5°C is reached, and the temperature maintain.

On the other hand, in Comparative Example 4, the temperature inside the grain storage bin 31 continued to decrease, but after 28 to 32 hours, it reached 9°C and the temperature was maintained.

In addition, in Comparative Example 5, the temperature inside the grain storage bin 31 continued to decrease, but after 28 to 32 hours, it reached 11°C and the temperature was maintained.

In Example 4, when the cooling auxiliary material with a salt content of 45% by weight was filled inside the filling portion 45, Comparative Example 4 with a salt content of 30% by weight and Comparative Example 4 with a salt content of 60% by weight. When compared to 5, it can be confirmed that the final cooling temperature of the grain storage bin 31 is lower.

In addition, it can be seen that in Comparative Example 4, the cooling rate of the grain storage bin 31 is slower than in Example 4, and the internal temperature cannot be reduced any further at 9°C.

In Comparative Example 4, the salt content of the cooling auxiliary material is reduced, resulting in a decrease in the amount of precipitated salt, resulting in a decrease in heat capacity, which causes a problem in that the cooling rate and maximum cooling temperature are reduced compared to Example 4.

Additionally, in Comparative Example 5, it can be seen that the temperature inside the grain storage bin 31 cannot be reduced any further at 11°C.

In Comparative Example 5, as the salt content of the cooling auxiliary material increases, the amount of salt precipitated increases, and the heat capacity increases due to the precipitated salt, so the cooling rate increases, but the maximum cooling temperature decreases. occurs.

As a result, it can be seen that the cooling efficiency of the cooling unit 4 decreases when the salt content of the cooling auxiliary material filled in the filling unit 45 decreases or increases above a certain value.

As a result of this experiment, it was confirmed that the cooling efficiency was most significantly increased when the cooling auxiliary material consisted of 6 to 12% by weight, 40 to 50% by weight of salt, and 40 to 50% by weight of water.

The grain refrigerator (1) configured in this way increases the cooling efficiency of the cooling section (4) by filling the inside of the filling section (45) with a cooling auxiliary material, so that the inside of the grain storage bin (31) is maintained up to the set temperature even in an environment with a high external temperature. can reduce the temperature.

The insulation block 5 is formed in a box shape, and the inside of the insulation block 5 is filled with an insulation material such as polyurethane or polyethylene.

In addition, the upper surface of the insulation block 5 is formed in a shape corresponding to the lower surface of the grain storage bin 31.

In addition, the insulation block 5 is formed with a cooling portion insertion hole 51 penetrating the upper and lower surfaces.

This insulation block (5) is installed to surround the lower part of the cooling rod (41), the cooling pipe body (44), and the mesh net (46) that are not inserted into the grain storage unit (3), so that the cold air flows into the grain storage bin (31). It increases cooling efficiency by preventing leakage to the outside.

In addition, the insulation block 5 prevents the heat generated from the heat sink structure 42 from being transferred to the lower surface of the grain storage bin 31, so that the grains located on the lower surface of the grain storage bin 31 are prevented from transmitting the heat of the heat sink structure 42. prevent damage from

The grain discharge bin (6) is formed in the shape of a cylinder with an open top, and is inserted into the discharge bin insertion hole formed in the case (2).

Since this grain discharge bin (6) is located at the lower part of the rotary bin (33), when the rotary bin (33) is rotated, grains inside the rotary bin (33) flow in, and the user can exit the case (2) as needed. can be separated.

1: Grain refrigerator 2: Case
3: Grain storage unit
31: Grain storage bin 32: Rotating bin housing
33: Rotating tube 34: Rotating shaft
35: handle 4: cooling unit
41: cooling rod 42: heat sink structure
43: Cooling fan 44: Cooling conduit body
45: Filling part 46: Mesh net
5: Insulation block 6: Grain discharge bin

Claims (9)

In a grain refrigerator consisting of a case, a grain storage unit installed inside the case and formed in a barrel shape with an open top to store grain therein, and a cooling unit that cools the grain stored in the grain storage unit:
The cooling unit
a cooling rod whose upper end penetrates the bottom surface of the grain storage unit and protrudes into the grain storage unit, and whose lower end is located lower than the bottom surface of the grain storage unit;
Cooling means installed on the lower surface of the cooling rod to cool the cooling rod;
a heat sink structure installed on the lower surface of the cooling means to radiate heat from the cooling means to the outside;
A filling portion installed to surround the cooling rod and filled with a cooling auxiliary material;
It is formed in the shape of a circular tube with a closed top, and includes a cooling pipe body installed to surround the filling part,
On the outer circumferential surface of the cooling rod,
It is formed in the shape of a funnel and is installed at an angle adjacent to the lower end of the cooling rod, the inner edge of which is connected to the outer peripheral surface of the cooling rod, and a water receiving plate is installed at the lowest height and has a water outlet through which moisture is discharged,
The heat sink structure is
A heat dissipation frame formed in a flat shape, installed on the lower surface of the cooling means, and having water discharge holes penetrating the upper and lower surfaces at positions corresponding to the water discharge holes of the water receiving plate;
It is formed in a flat shape and includes heat sinks installed perpendicularly to the lower surface of the heat dissipation frame,
The cooling unit
Moisture generated within the internal space, which is the space formed between the cooling rod and the cooling pipe body, is discharged to the outside through the water outlet of the water receiving plate and the water outlet hole,
The water outlet is
An opening and closing door installed at the bottom;
It includes electrodes installed spaced apart from each other on the inner peripheral surface,
The opening and closing door is
A grain refrigerator that is closed in normal times to prevent heat from the heat sink structure from flowing into the internal space, but when moisture accumulates in the water outlet more than a certain amount, the electrodes are energized by the moisture to open the door. . The method of claim 1, wherein the cooling auxiliary material is
A grain refrigerator, characterized in that it is manufactured by mixing 6 to 12% by weight of acetic acid, 40 to 50% by weight of salt, and 40 to 50% by weight of water. The grain refrigerator according to claim 2, wherein the interior of the outer walls of the grain storage unit is filled with a moisture absorbent. The method of claim 3, wherein the moisture absorbent is
A grain refrigerator characterized in that it is salt from which the bittern has been removed. The grain refrigerator according to claim 4, wherein the cooling pipe body is made of red clay material with added salt. The grain refrigerator according to claim 5, wherein salt is plated on the inner and outer circumferential surfaces of the cooling pipe body. delete delete The method of claim 1 or 6, wherein the grain storage unit
A grain storage bin formed in the shape of a barrel with an open top and a grain discharge port formed on the bottom;
It is formed in the shape of a circular tube with one end closed, and a first opening and a second opening penetrating the outer peripheral surface and the inner peripheral surface are formed in the longitudinal direction and are formed to face each other, and the grain is formed so that the first opening communicates with the grain discharge port. A rotating barrel housing installed at the lower part of the storage tank;
It is formed in the shape of a circular tube with both ends closed, and a third opening penetrating the inner and outer peripheral surface is formed in the longitudinal direction and includes a rotary tube rotatably installed inside the rotary tube housing,
The rotary tube is
A grain refrigerator, characterized in that when installed, a locking protrusion located inside the second opening of the rotary barrel housing is formed on the outer peripheral surface, so that the rotation angle is limited by the locking protrusion.