KR102411874B1 - Small size refrigerator having improved cooling efficiency by cooling aid material - Google Patents

Abstract

In the present invention, the cooling efficiency is increased by the cooling auxiliary material filled inside the cooling unit, so that the temperature inside the refrigerating compartment can be reduced to a preset temperature even when the external temperature is high, so that there is no need to install a separate cooling device. The overall volume of the small refrigerator is reduced as well as the cost, and the cooling auxiliary cover is detachably configured to the heat absorbing block, and the cooling auxiliary material is filled inside to increase the cooling efficiency of the heat absorbing block. It relates to a small refrigerator capable of reducing cost and installation time because cooling efficiency can be increased without replacing the refrigerator.

Description

Small size refrigerator having improved cooling efficiency by cooling aid material

The present invention relates to a small refrigerator with improved cooling efficiency by being filled with a cooling auxiliary material, and more particularly, a cooling that can increase the cooling efficiency of the cooling unit by filling the heat absorbing block with a cooling auxiliary material that increases thermal conductivity and heat capacity It relates to a small refrigerator with improved cooling efficiency by being filled with auxiliary substances.

In general, a thermoelectric element is used as a cooling means in small refrigerators such as cosmetic refrigerators and wine refrigerators.

At this time, the thermoelectric element is a semiconductor element in which heat dissipation (heating) occurs at the forward junction when a current is applied and heat absorption (cooling) occurs at the opposite junction, and can be implemented with low power and small size.

However, in small refrigerators using thermoelectric elements, a plurality of thermoelectric elements must be installed in order to reduce the internal temperature to a preset cooling temperature. As a result, small-sized refrigerators increase the amount of current consumed, resulting in increased maintenance costs.

In addition, in conventional small refrigerators, when the thermoelectric element is cut off, the temperature of the refrigerating chamber rapidly increases, resulting in a shortened storage period or deterioration of the stored items.

In order to solve this problem, domestic registered patent No. 10-1753539 (title of invention: refrigerator employing thermoelectric cooling module) (hereinafter referred to as 'prior art') was developed.

1 is a perspective view of the prior art.

As shown in FIG. 1 , the prior art 100 includes a storage container 101 , a cooler housing 102 , a heat insulation cover 103 , a cooling module 104 , and a heat dissipation module 105 .

The storage container 101 is formed in the shape of a housing having an open surface, and refrigerated goods are stored therein.

The cooler housing 102 is installed to surround the storage container 101 and is made of a metal material having high thermal conductivity. In addition, the cooler housing 102 evenly transmits the cold air generated from the cooling module 103 to the storage container 101 so that the inside of the storage container 101 is uniformly cooled.

The heat insulating cover 103 is installed to surround the cooler housing 102, and prevents the cooler housing 102 from being heated by external heat or heat generated from the cooling module 104, thereby reducing cooling efficiency.

The cooling module 104 is installed on the rear surface of the cooler housing 102 and cools the cooler housing 102 by a thermoelectric element (not shown) installed therein.

The heat dissipation module 105 discharges heat generated when the cooling module 104 cools the cooler housing 102 to the outside.

The prior art 100 configured as described above can minimize the temperature change in the refrigerating compartment even when the power applied to the thermoelectric element is cut off because the condenser accumulates cooling heat.

In addition, the prior art 100 has a structure in which the cooling module 104 is directly fixed to the cooler housing 102 , thereby reducing the time required in the assembly process.

However, since the prior art 100 does not have a separate means for increasing the cooling efficiency of the thermoelectric element installed inside the cooling module 104, when the external temperature increases, the temperature inside the storage container 101 is set to a preset temperature. cannot be reduced to For this reason, in the prior art 100 , there is a problem in that the refrigerated goods stored in the storage container 101 are deteriorated due to a change in temperature.

In addition, in the case of a thermoelectric element using the Peltier effect, if the area where heat radiation (heating) occurs is overheated, cooling efficiency is reduced or damaged, making normal operation impossible. Since the desired temperature can be lowered to the desired temperature by installing the

The present invention is to solve this problem, and the cooling auxiliary material is filled inside the cooling unit to increase the thermal conductivity and heat capacity of the cooling unit, so that the cooling efficiency is increased. It is about a small refrigerator that can be made.

In addition, another solution to the present invention is that the cooling auxiliary cover is configured to be detachably attached to the heat absorbing block, and at the same time, the cooling auxiliary material is filled inside to increase the cooling efficiency of the heat absorbing block, thereby increasing the cooling efficiency without replacing the small refrigerator. It relates to a cooling auxiliary cover that can be made.

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The solution of the present invention for solving the above problems is a cooling auxiliary cover filled with a cooling auxiliary material therein, and installed detachably on a heat absorption block of a small refrigerator to increase the cooling efficiency of the heat absorption block: the heat absorption block a heat absorbing block body in the shape of a silver square plate; The cooling fins vertically protruding from the front surface of the heat absorbing block body and protruding parallel to each other, wherein the cooling auxiliary cover includes a cover body having a rectangular flat plate shape; Doedoe vertically protruding from the front surface of the cover body, including vertical protrusions protruding parallel to each other, the lower surface of the vertical protrusions are formed to extend to a portion adjacent to the upper surface, the rear end is formed to extend to the rear surface of the cover body, the Cooling fin insertion grooves into which cooling fins are respectively inserted are formed, and when the cooling fins are inserted into the cooling fin insertion grooves, the cooling auxiliary cover comes into contact with the inserted cooling fins to limit downward movement.

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.

According to the present invention having the above problems and solutions, the cooling efficiency is increased by the cooling auxiliary material filled in the inside of the cooling unit, so that it is possible to reduce the temperature inside the refrigerating compartment to a preset temperature even when the outside temperature is high. Since there is no need to install a cooling device, the overall volume of the small refrigerator is reduced, and the cost is also reduced.

In addition, according to the present invention, the cooling auxiliary cover is configured to be detachably attached to the heat absorbing block and at the same time the cooling auxiliary material is filled inside to increase the cooling efficiency of the heat absorbing block, so that the cooling efficiency can be increased without replacing the small refrigerator. Therefore, it is possible to reduce the cost and installation time.

1 is a perspective view of the prior art.
2 is a cross-sectional view of a small refrigerator of the present invention.
3 is a cross-sectional view of the heat absorbing block of FIG. 2 .
4 is an exploded perspective view of a second heat absorbing block and a cooling auxiliary cover, which is a second embodiment of the heat absorbing block of FIG. 2 .

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

2 is a cross-sectional view of the small refrigerator of the present invention, and FIG. 3 is a cross-sectional view of the heat absorbing block of FIG. 2 .

As shown in FIG. 2 , the small refrigerator 1 includes a case 2 , a refrigerating compartment 3 , and a cooling unit 4 .

The case 2 is formed in the shape of a housing having an open front and a space therein, and a refrigerating chamber 3 and a cooling unit 4 are installed therein.

In addition, a door 21 is installed on the front side of the case 2 to be opened and closed by a user.

In addition, discharge holes 22 for discharging the heat emitted from the heat dissipation block 43 to the outside to be described later are formed on the rear surface of the case 2 .

The refrigerating compartment 3 is formed in a housing shape with an open front, a space for storing items is formed therein, and is installed inside the case 2 .

At this time, although not shown in the drawing, the refrigerating compartment 3 may be separated into an internal space by additionally installing a partition wall, a shelf, and the like.

In addition, a space is formed between the rear surface of the refrigerating compartment 3 and the rear surface of the case 2 , whereby the cooling unit 4 is installed.

In addition, a thermoelectric element through hole 31 through which the thermoelectric element 42 passes is formed in the rear surface of the refrigerating compartment 3 .

In addition, an insulating block 32 installed to surround the refrigerating compartment 3 is installed outside the refrigerating compartment 3 .

The insulating block 32 increases the cooling efficiency of the cooling unit 3 by preventing external heat from flowing into the refrigerating compartment 3 and at the same time preventing the cold air from the refrigerating compartment 3 from being released to the outside. In addition, by preventing the heat dissipation block 43 from coming into contact with the refrigerating compartment 3 , the refrigerating compartment 3 is prevented from being heated by the heat of the heat dissipating block 43 .

The cooling unit 4 includes a heat absorbing block 41 , a thermoelectric element 42 , a heat dissipation block 43 , and a heat dissipation fan 44 .

The heat absorbing block 41 is installed inside the refrigerating compartment 3 , and is installed at a position adjacent to the rear surface of the refrigerating compartment 3 . At this time, the heat absorbing block 41 includes a rectangular plate-shaped heat absorbing block body 411, a plurality of cooling fins 412 installed vertically from the front of the heat absorbing block body 411, and a heat absorbing block body 411 and cooling. It consists of a cover 413 installed to surround the pins 412 .

The cover 413 is installed to surround the heat absorbing block body 411 and the cooling fins 412, and is made of loess and absorbs moisture inside the refrigerating compartment 3, thereby preventing a decrease in cooling efficiency due to moisture. In addition, it is possible to prevent the growth of mold, bacteria, etc. due to moisture.

In addition, an inner space (A) is formed inside the heat absorbing block body (411) and the cooling fins (412), and the cooling auxiliary material (C) is filled in the inner space (A).

At this time, the internal space (A) formed inside the heat absorbing block body 411 and the cooling fins 412 is separated by a plurality of partition walls 414, as shown in FIG. 3, so that the cooling auxiliary material (C) This non-uniform distribution can prevent the refrigerating compartment 3 from being non-uniformly cooled.

The cooling auxiliary material (C) 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°C is 36g/100ml. That is, since salt is added in an amount greater than the solubility of water, salt is precipitated inside the cooling auxiliary material (C).

When acetic acid is contained in water, the cooling auxiliary material (C) increases heat capacity and specific heat because acetic acid and water undergo hydrogen bonding.

In addition, the thermal conductivity of the cooling auxiliary material (C) is increased by salt dissolved in water and salt precipitated.

That is, since the heat capacity of the cooling auxiliary material (C) is increased by acetic acid, the amount of energy required for temperature change is increased, so that even if external heat is introduced, the temperature of the heat absorbing block 41 can be maintained at a preset temperature. . In addition, since the cooling auxiliary material (C) increases the thermal conductivity by the salt contained therein, the cold air generated from the thermoelectric element 42 attached to the rear surface of the heat absorbing block body 411 is rapidly transferred to the cooling fins 412 . Because it is transferred, the inside of the refrigerating compartment 3 can be rapidly cooled.

Due to this, the heat absorbing block 41 not only reduces the amount of increase in temperature due to heat flowing in from the outside, but also increases the cooling efficiency because the cold air transferred from the thermoelectric element 42 is quickly dispersed throughout the heat absorbing block 41. .

In addition, since cooling to a preset temperature is possible even if a plurality of thermoelectric elements are not installed, power consumption is reduced compared to conventional small refrigerators in which a plurality of thermoelectric elements are installed, thereby reducing maintenance costs.

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

The thermoelectric element 42 is an element operated by the Peltier effect in which one surface is cooled when current flows, and the other surface is heated.

One side of the thermoelectric element 42 is attached to the rear surface of the heat absorbing block body 411 to cool the heat absorbing block 41 , and the other surface is attached to the front surface of the heat dissipating block 43 to heat the heat dissipating block 43 .

That is, the thermoelectric element 42 cools the heat absorbing block 41 to reduce the temperature inside the refrigerating compartment 3 , and discharges heat generated during cooling to the outside by the heat dissipation block 43 .

The heat dissipation block 43 includes a heat dissipation block body 431 in the shape of a rectangular flat plate, and a plurality of heat dissipation fins 432 vertically installed from the rear surface of the heat dissipation block body 431 .

The heat dissipation block 43 receives the heat generated from the thermoelectric element 42 by attaching the front surface of the heat dissipation block body 431 to the rear surface of the thermoelectric element 42 , and emitting the heat to the atmosphere through the heat dissipation fins 432 . The heat generated from the rear surface of the thermoelectric element 42 is discharged to the outside to increase the cooling efficiency of the thermoelectric element 42 .

The heat dissipation fan 44 is installed at the rear of the heat dissipation block 43, and by cooling the heat dissipation block 43, the heat of the thermoelectric element 42 is discharged to the outside more quickly to increase the cooling efficiency of the thermoelectric element 42 make it

In the cooling unit 4 configured in this way, cold air emitted from the front surface of the thermoelectric element 42 is transferred to the heat absorbing block 41, and the temperature of the cooling unit 3 is cooled by the heat absorbing block 41, the temperature of which is reduced by the cold air. The temperature is decreased, and the cooling efficiency is reduced due to overheating of the thermoelectric element 42 by discharging the heat generated from the rear surface of the thermoelectric element 42 to the outside by the heat dissipating block 43 and the heat dissipating fan 44 . prevent.

In addition, since the heat capacity and thermal conductivity are increased by filling the inside of the heat absorbing block 41 with the cooling solution C, the cold air received from the thermoelectric element 42 is rapidly transferred to the cooling fins 412, and the Since the temperature rise due to heat is reduced, the cooling efficiency is prevented from being reduced by external heat, and the cooling state can be maintained for a long time even when the power is cut off or disconnected.

The following [Table 1] shows that when different materials are filled in the internal space (A) of the heat absorbing block 41 in a state where the external temperature is 25 ℃ and the cooling temperature is set to 5 ℃, the cooling unit 4 It is a measured value of the temperature inside the refrigerating compartment 3 that changes as the unit is operated.

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

* The unit is ℃. At this time, the volume of the inner space (A) is 120mL.

Embodiment 1 is a small refrigerator in which the cooling auxiliary material (C) is filled in the inner space (A) of the heat absorbing block (41).

Embodiment 2 is a small refrigerator filled with salt in the heat absorbing block 41 inner space (A).

Comparative Example 1 is a small refrigerator in which air is filled in the internal space (A) of the heat absorbing block 41 .

Referring to Example 1 with reference to Table 1, in Example 1, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 24 to 28 hours have elapsed, the set temperature of 5° C. is reached and the temperature is maintained. do.

Also, in Example 2, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 20 to 24 hours have elapsed, it reaches 10° C. and the temperature is maintained.

On the contrary, in Comparative Example 1, the temperature inside the refrigerating compartment 3 is continuously decreased, reaching 16° C. when 28 to 32 hours have elapsed, and the temperature is no longer reduced.

In Example 1, the cooling auxiliary material (C) is filled in the inner space (A) of the heat absorbing block 41, so that the cooling auxiliary material (C) is not filled in the heat absorbing block 41 Example 2 and Comparative Example Compared with 1, it can be seen that the final cooling temperature is lower.

In addition, in Example 2, it can be confirmed that the temperature inside the refrigerating compartment 3 is no longer reduced at 10.0°C.

In this embodiment 2, salt is filled in the heat absorbing block 41 and thermal conductivity is increased, so that the cooling rate is increased than in embodiment 1, but the cooling temperature is not reduced to a preset temperature because the heat capacity of the salt is lower than that of the cooling auxiliary material. problems arise that cannot be

Also, in Comparative Example 1, the internal temperature of the refrigerating compartment 3 was no longer reduced at 16° C., so that the internal temperature of the refrigerating compartment 3 was higher than that of Comparative Example 1.

In Comparative Example 1, the cooling rate and cooling efficiency of the heat absorbing block 41 are reduced because the air filled in the heat absorbing block 41 serves as an insulator, so that the cooling temperature cannot be reduced to a preset temperature. .

For this reason, when the cooling auxiliary material (C) is filled in the inner space (A) of the heat absorbing block (41), the cooling unit (4) is cooled to the set temperature, but only salt is filled or the inner space (A) When the air is filled, it can be seen that the cooling efficiency is reduced than when the cooling auxiliary material (C) is filled.

That is, when the cooling auxiliary material (C) is filled in the inner space (A) of the heat absorbing block 41 as in Example 1, the cooling unit 4 is filled with salt in the inner space (A) (Example) 2) or when air (Comparative Example 1) is filled, the cooling efficiency is increased.

The following [Table 2] shows the temperature inside the refrigerating compartment (3) when the content of acetic acid injected into the cooling auxiliary material (C) is changed when the external temperature is 25°C and the cooling temperature is set to 5°C is one value.

At this time, the cooling auxiliary material (C) is made so that the content of water and salt is the same even if the content of acetic acid is changed.

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

* The unit is ℃. At this time, the volume of the inner space (A) is 120mL.

Example 3 is a small refrigerator in which the cooling auxiliary material (C) having an acetic acid content of 10% by weight is filled in the internal space (A) of the heat absorbing block (41).

Comparative Example 2 is a small refrigerator in which the cooling auxiliary material (C) having an acetic acid content of 4 wt% is filled in the internal space (A) of the heat absorbing block (41).

Comparative Example 3 is a small refrigerator in which the cooling auxiliary material (C) having an acetic acid content of 15 wt% is filled in the inner space (A) of the heat absorbing block (41).

Referring to Example 3 with reference to Table 2, in Example 2, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 24 to 28 hours elapse, the set temperature of 5° C. is reached, and the temperature is maintained. do.

On the other hand, in Comparative Example 2, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 20 to 24 hours have elapsed, it reaches 10° C. and the temperature is maintained.

Also, in Comparative Example 3, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 28 to 32 hours have elapsed, it reaches 12° C. and the temperature is maintained.

In Example 3, when the cooling auxiliary material (C) having an acetic acid content of 10 wt% is filled in the internal space (A) of the heat absorbing block 41, Comparative Example 2 having an acetic acid content of 4 wt% and acetic acid It can be confirmed that the final cooling temperature is lower when compared with Comparative Example 3 in which the content is 15% by weight.

In Comparative Example 2, it can be seen that the cooling rate of the refrigerating compartment 3 is slower than that of Example 3, and the internal temperature cannot be further reduced at 10°C.

In Comparative Example 2, since the amount of acetic acid contained in the cooling auxiliary material filled inside the heat absorbing block 41 was reduced than that of the cooling auxiliary material of Example 3, the heat capacity of the cooling auxiliary material was reduced, thereby reducing the influence of external temperature. If the external temperature is high, the problem arises that the temperature inside the refrigerating compartment cannot be cooled to a preset temperature.

Also, in Comparative Example 3, since the amount of acetic acid contained in the cooling auxiliary material filled inside the heat absorbing block 41 was increased than that of the cooling auxiliary material of Example 3, the heat capacity of the cooling auxiliary material was increased, so that the thermoelectric element of the same efficiency ( 42), there is a problem that the temperature cannot be reduced to a preset temperature.

Due to this, the cooling unit 4 confirms that the cooling efficiency is reduced when the content of acetic acid in the cooling auxiliary material (C) filled in the inner space (A) of the heat absorbing block 41 is reduced or increased to a certain value or more. can

The following [Table 3] shows the temperature inside the refrigerating compartment (3) when the content of salt added in the cooling auxiliary material (C) is changed in a state where the external temperature is 25 ℃ and the cooling temperature is set to 5 ℃ is one value.

At this time, the cooling auxiliary material (C) keeps the ratio of water and acetic acid constant even if the salt content is changed.

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

* The unit is ℃. At this time, the volume of the inner space (A) is 120mL.

Example 4 is a small refrigerator in which the cooling auxiliary material (C) having a salt content of 45 wt% is filled in the internal space (A) of the heat absorbing block (41).

Comparative Example 4 is a small refrigerator in which a cooling auxiliary material (C) having a salt content of 30 wt% is filled in the inner space (A) of the heat absorbing block (41).

Comparative Example 5 is a small refrigerator in which a cooling auxiliary material (C) having a salt content of 60 wt% is filled in the inner space (A) of the heat absorbing block (41).

Referring to Example 4 with reference to Table 3, in Example 4, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 24 to 28 hours have elapsed, the set temperature of 5° C. is reached and the temperature is maintained. do.

On the other hand, in Comparative Example 4, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 28 to 32 hours have elapsed, it reaches 9° C. and the temperature is maintained.

Also, in Comparative Example 5, the temperature inside the refrigerating compartment 3 is continuously decreased, and when 20 to 24 hours have elapsed, it reaches 11° C. and the temperature is maintained.

In this embodiment 4, when the cooling auxiliary material (C) having a salt content of 45 wt% in the inner space (A) of the heat absorbing block 41 is filled, the salt content is 30 wt% and Comparative Example 4 and the salt content It can be seen that the final cooling temperature is lower than that of Comparative Example 5, which is 60% by weight.

Also, in Comparative Example 4, it can be seen that the cooling rate of the refrigerating compartment 3 is slower than that of Example 4, and the internal temperature is no longer reduced at 9°C.

In Comparative Example 4, as the salt content of the cooling auxiliary material (C) is reduced, the amount of precipitated salt is reduced, so that the heat capacity is reduced, so that the cooling rate and the maximum cooling temperature are reduced than in Example 4, which is a problem.

In addition, in Comparative Example 5, it can be confirmed that the temperature inside the refrigerating compartment 3 is no longer reduced at 9°C.

In Comparative Example 5, the amount of precipitated salt increases as the salt content of the cooling auxiliary material (C) increases, and the cooling rate is increased because the heat capacity is increased by the precipitated salt, but the maximum cooling temperature is decreased. problems will arise.

Due to this, the cooling unit 4 can confirm that the cooling efficiency is reduced when the salt content of the cooling auxiliary material (C) filled in the inner space (A) of the heat absorbing block 41 is reduced or increased to a certain value or more. have.

As a result of such an experiment, it was confirmed that the cooling efficiency was greatest when the cooling auxiliary material (C) was composed of 6 to 12% by weight, 40 to 50% by weight of salt, and 40 to 50% by weight of water.

The small refrigerator 1 configured in this way increases the cooling efficiency of the cooling unit 4 by filling the inside of the heat absorbing block 4 with a cooling auxiliary material (C). ) can reduce the internal temperature.

4 is an exploded perspective view of a second heat absorbing block and a cooling auxiliary cover that is a second embodiment of the heat absorbing block of FIG. 2 .

The second heat absorbing block 5 includes a second heat absorbing block body 51 and second cooling fins 52 .

The second heat absorbing block body 51 is formed in a square flat plate shape, and a thermoelectric element 42 is attached to the rear surface.

The second cooling fins 52 are formed in a flat plate shape and vertically protrude from the front surface of the second heat absorbing block body 51 and are formed parallel to each other.

The cooling auxiliary cover (6) is composed of a cover body (61) in the shape of a square flat plate, and vertical protrusions (62) vertically protruding from the front surface of the cover body (61), and is installed on the front surface of the second heat absorbing block (5). to increase the cooling efficiency of the second heat absorbing block (5).

At this time, the vertical protrusions 62 are formed so that both ends extend to the upper and lower surfaces of the cover body 61, respectively.

In addition, second cooling fin insertion grooves 63 extending to a portion adjacent to the upper surface are formed on the lower surface of the vertical protrusions 62 , respectively. At this time, the rear end of the second cooling fin insertion grooves 63 extends to the rear surface of the cover body 61 .

These cooling fin insertion grooves 63 are formed in a shape corresponding to the second cooling fins 52, so that, when assembling, the second cooling fins 52 are respectively inserted into the cooling fin insertion grooves 63, and the upper surface is The downward movement is limited by being in contact with the second cooling fins 52 .

In addition, when a cooling auxiliary material (not shown) is filled in the cooling auxiliary cover 6 and installed in front of the second heat absorbing block 5 , the cooling efficiency of the second heat absorbing block 5 is increased.

At this time, the cooling auxiliary cover 6 is preferably formed of a material such as plastic, aluminum, silica stone.

In addition, the inner space (not shown) of the cooling auxiliary cover 6 is configured to be separated by a plurality of partition walls (not shown), so that acetic acid and salt inside the cooling auxiliary material are non-uniformly distributed, so that the cooling efficiency of the cooling unit 4 is This can be prevented from being different for each location.

Since the cooling auxiliary cover 6 configured in this way is configured to be detachably attached to the front surface of the heat absorbing block, it can be installed not only on the second heat absorbing block 5 but also on the heat absorbing block of other small refrigerators.

That is, the cooling auxiliary cover 6 is installed in the heat absorbing block of the small refrigerator that does not allow cooling to a preset temperature due to low cooling efficiency to increase the cooling efficiency of the heat absorbing block of the small refrigerator, so that it can be cooled to a preset temperature.

Since the cooling auxiliary cover 6 can increase the cooling efficiency of the small refrigerator by simple attachment and detachment, the installation cost is reduced.

1: small refrigerator 2: case
21: door 3: refrigerator compartment
31: through hole 32: insulating block
4: cooling unit 41: heat absorbing block
42: thermoelectric element 43: heat dissipation block
44: heat dissipation fan 5: second heat absorbing block
51: second heat absorbing block body 52: second cooling fin
6: cooling auxiliary cover 61: cover body
62: vertical protrusion

Claims (6)

delete delete delete delete In the cooling auxiliary cover which is filled with a cooling auxiliary material and is installed detachably on the heat absorption block of a small refrigerator to increase the cooling efficiency of the heat absorption block:
The heat absorbing block is
a heat absorbing block body in the shape of a square plate;
It includes cooling fins vertically protruding from the front surface of the heat absorbing block body and protruding parallel to each other,
The cooling auxiliary cover
Cover body in the shape of a square plate;
Doedoe vertically protruding from the front surface of the cover body, including vertical protrusions protruding parallel to each other,
Cooling fin insertion grooves are formed on the lower surface of the vertical protrusions to extend to a portion adjacent to the upper surface, and the rear end is formed to extend to the rear surface of the cover body and into which the cooling fins are respectively inserted;
The cooling auxiliary cover, characterized in that when the cooling fins are inserted into the cooling fin insertion grooves, the cooling auxiliary cover is in contact with the inserted cooling fins to limit the downward movement. The method according to claim 5, wherein the cooling auxiliary material is
A cooling auxiliary cover, characterized in that it is 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.

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