KR200286414Y1 - Cooling cabinet for communication equipment - Google Patents

Abstract

The present invention is equipped with a phase change material that absorbs ambient heat while releasing ambient heat or emits storage heat together with the heating element equipment, and the side wall is composed of a heat sink that has good heat transfer efficiency between inside and outside and is easy to assemble. The present invention relates to a communication box housing that can be stably maintained within a desired temperature range.

The communication device storage box of the present invention provides a storage space defined by a plurality of walls, a top plate and a bottom plate, the wall is made of a heat sink for dissipating heat inside the enclosure to the outside, the upper portion of the storage space The phase change material is characterized in that the phase change material is disposed to absorb and store the heat generated from the communication equipment to release the heat when the internal temperature drops to a predetermined temperature.

Description

Cooling cabinet for communication equipment with natural cooling function by phase change material

The present invention relates to a housing for storing equipment that generates heat during operation, such as communication equipment, and more specifically, the phase change material absorbing ambient heat or releasing storage heat while generating a phase change together with the heating element equipment. The side wall and the like relates to a communication equipment storage box which can maintain the internal temperature stably within a desired temperature range by constructing a heat sink having good heat transfer efficiency between inside and outside and easy to assemble.

In general, communication equipment such as communication equipment is generally divided into a system unit and a power unit. The system unit is provided with a plurality of boards each installed according to its function, and the power unit is provided to supply power to the system unit. As the communication equipment is developed in the industry, the system part is becoming high performance and high capacity, and thus, a high temperature heat is generated in the power part that supplies power to the system part.

Recently, with the rapid spread and expansion of wired and wireless communication networks, the frequency of installation of communication equipment is increasing. When installed outdoors, communication equipment is housed in enclosures that are normally shielded from the outside for equipment protection. In order for communication equipment to operate normally and maintain a long life, the temperature in the enclosure needs to be maintained within a predetermined temperature range. Since communication equipment generates a lot of heat during operation, the enclosure needs to be provided with means for releasing the generated heat to the outside to maintain the required temperature at the required temperature.

Conventionally widely used cooling methods include an air-cooled cooling device using a cooling fan, and a water-cooled cooling device using cooling water. The air-cooled cooling device cools the communication equipment by generating wind by the cooling fan and forcibly dissipating and dissipating high temperature heat generated by the communication equipment in the enclosure to the outside of the enclosure. However, in the hot summer, the cooling performance is greatly reduced, causing malfunctions such as down due to overheating of communication equipment. If an error occurs in the cooling fan, the temperature inside the enclosure increases, which may cause a malfunction of the communication equipment. In addition, there are many cases in which communication equipment boxes are mainly installed in India, where the hot wind emitted by the cooling fan is transmitted to the person passing by, which causes discomfort, and the operation noise of the cooling fan is also a fatal weakness of this method. . In addition, the use of a cooling fan, the electric consumption was large, the maintenance cost was high.

On the other hand, the communication equipment has a plate in nature. The water-cooled chiller is made of a structure in which a pipe member is inserted to allow the coolant to flow on the plate, and the coolant flowing in the pipe cools by exchanging heat generated by communication equipment. However, this method has a low heat transfer rate due to the heat resistance to the tube, and high temperature heat is locally concentrated on the plate between the tube and the tube through which the coolant flows. As a result, deformation such as bending due to overheating occurs in a board on the system, resulting in breakage and communication equipment down.

Therefore, the object of the present invention is to solve the drawbacks of the conventional cooling method, the heat sink is made of a heat sink with excellent heat transfer efficiency and easy to assemble structure to absorb and release heat through the phase change therein It is to provide a communication equipment storage box by embedding the change material to effectively discharge the heat generated by the storage equipment to the outside to maintain the internal temperature at a temperature that ensures the normal operation of the storage equipment.

DETAILED DESCRIPTION A detailed description of embodiments of the present invention will be made with reference to the accompanying drawings, in which like numbers designate corresponding parts in the drawings.

1 is a perspective view showing the appearance of the communication equipment housing according to the present invention,

2 is an internal structural view showing a structure inside the housing of the communication equipment shown in Figure 1,

3 is a perspective view illustrating a structure of a heat sink constituting sidewalls of the enclosure illustrated in FIG. 1;

4A and 4B are perspective views of the unit parts constituting the heat sink of FIG. 3 and assembled cross-sectional views thereof;

Figure 5 is a graph showing the temperature change inside the housing of the present invention over time,

Figure 6 is a graph showing the temperature at various points within the housing of the present invention over time.

** Explanation of symbols for main parts of drawings **

10: enclosure 12: top plate

14: pillar 16: bottom plate

20: communication equipment 30: phase change material

32: case 40: heat sink

40a, 40b: unit heat sink 42, 44: heat dissipation fin

46: male 48: female

According to the present invention for achieving the above object, the communication device housing provides a storage space defined by a plurality of walls, a top plate and a bottom plate in a housing for protecting communication equipment, wherein the wall is a heat inside the housing. Is made of a heat dissipating plate which emits heat to the outside, and a phase change material is disposed on the upper portion of the storage space to absorb and store heat generated from the communication equipment, and emit heat when the internal temperature drops to a predetermined temperature. It is characterized by.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to a preferred embodiment of the present invention.

Figure 1 is a perspective view showing the appearance of the equipment housing equipped with a communication equipment housing according to the present invention, Figure 2 is an internal structure showing the structure of the interior of the communication equipment shown in FIG. 3 is a perspective view illustrating a structure of a heat sink constituting sidewalls of the enclosure illustrated in FIG. 1.

As shown, the communication device 20 is accommodated inside the enclosure 10, and at the same time, a phase change material (hereinafter referred to as PCM) 30 is also located. The PCM 30 absorbs or releases heat while causing a phase change. In other words, if the solid state exists, but a large amount of heat is released from the communication equipment 20, and the heat dissipation ability through the heat sink 40 is insufficient, the heat is melted in the liquid state while absorbing the heat inside the enclosure. When the temperature of the temperature decreases and thus the temperature inside the enclosure 10 decreases, the PCM 30 releases the stored heat, causing a phase change again to solidify. The phase change of the PCM 30 from solid to liquid to solid occurs during the daily cycle. The PCM 30 is stored in a thin aluminum square extrusion case 32 to increase the heat transfer efficiency between the air and the PCM, and is usually placed on the upper side of the communication equipment 20 based on the natural law in which the heated heat rises upward. Is installed. In addition, a kind of material having a particular melting temperature is selected to maintain the cyclic phase change (solid-liquid-solid) temperature range, preferably a paraffinic system is suitable. In more detail, the PCM 30 is stored in the aluminum case 32 of the thin plate so that the contact area with air is increased to maximize heat absorption and release, and the PCM case 32 of the thin plate is enclosed. (10) It can be easily installed and replaced by installing in the slot provided in the upper part.

In the present invention, in particular, the enclosure 10 itself is constituted by a heat sink 40 in order to increase the heat radiation effect. The enclosure 10 has at least sidewalls composed of a heat sink 40. Since the enclosure 10 is generally rectangular box type, at least four side walls are constituted by the heat sink 40. In the present embodiment, the enclosure 10 is fixed to the four heat sinks 40 forming the four sides of the four walls 14, the bottom plate 16 and the top plate 12 by combining a rectangular box body Doing. The bottom plate 16 and the top plate 12 are made of stainless steel. Contrary to that shown, the upper plate 12 can also be expected to have a higher heat dissipation effect if the heat sink is configured.

The heat sink 40 is made of a material having high thermal conductivity, typically aluminum. The heat sink 40 has a high heat exchange between the interior and the exterior of the enclosure 10, thereby reducing the temperature difference between the inside / outside. To this end, the heat sink 40 has a structure having a contact area with air as wide as possible in the enclosure 10, the outside. The detailed structure of the heat sink 40 will be described with reference to FIGS. 4A and 4B.

4A is a perspective view of a unit part constituting the heat sink of FIG. 3, and FIG. 4B is an assembly cross-sectional view illustrating a method of forming a heat sink corresponding to a wall surface of a housing having a desired size by combining the unit parts.

Innumerable heat dissipation fins 42 and 44 protrude from both sides of the unit heat dissipation plates 40a and 40b of the heat dissipation plate 40. The heat dissipation fins 42 and 44 have a thin and long vertical plate shape. The side wall of the housing | casing 10 is comprised by connecting the appropriate number of these unit heat sinks 40a and 40b. The heat dissipation fins 42 formed on one side thereof are positioned inside the enclosure 10, and the heat dissipation fins 44 formed on the opposite side thereof are positioned outside the enclosure 10. By forming a large number of heat sink fins (42, 44) in this way, the area in contact with the air to increase the heat transfer efficiency from the air, thereby reducing the temperature gap through the smooth heat transfer inside / outside the enclosure.

A male portion 46 protrudes at one end of the unit heat sinks 40a and 40b, and an arm portion 48 coupled to the male portion 46 is formed at the other end thereof. Therefore, the male portion 46 of the unit heat sink 40a is inserted into the arm portion 48 of the unit heat sink 40b adjacent thereto to make the heat sink 40 suitable for the desired enclosure size (length in the horizontal direction). The male part 46 and the female part 48 are each formed in the shape of a protrusion and a groove extending in two circular shapes as shown in FIG. 4A, thereby maintaining improved airtightness when combined, making it difficult to penetrate water and the like from the outside. The unit heat dissipation plates 40a and 40b of the heat dissipation plate 40 are obtained by rolling extrusion. Here, two unit heat sinks 40a and 40b are illustrated for convenience of description, but the number may be three or more according to the size of the heat sink.

5 is a graph showing a temperature change inside the housing of the present invention with time, and FIG. 6 is a graph showing the temperature at various points within the housing of the present invention over time. In FIG. 5, the temperature outside the enclosure is represented by a solid line, the temperature inside the enclosure when the PCM is used as a triangular line, and the temperature inside the enclosure when the PCM is not applied is represented by a rectangular line. 5 and 6 show the results of testing for 72 hours in the external temperature range of -30 to 45 ° C. Now, the operation of the present invention will be described in detail with reference to the conducting surfaces.

High heat is generated in accordance with the operation of the communication equipment 20 existing inside the enclosure 10. The heat generated in this way remains in the enclosure 10, which is absorbed by the PCM 30 located at the upper end of the enclosure 10, and part of the heat is released to the outside through the heat sink 40. For example, while the outside temperature rises from low temperature to high temperature (in the case of morning), there is a large temperature difference between the inside and outside, so that the heat generated by the communication equipment 20 is partially absorbed by the PCM 30 and the remaining heat is It is discharged to the outside through the heat sink (40). During the day, the temperature difference inside and outside the enclosure 10 decreases relatively, so that the heat absorbed by the PCM 30 increases, causing the PCM 30 to change phase from solid to liquid. Then, when the external temperature falls in the evening, the heat released from the communication equipment 20 and the latent heat absorbed by the phase change material PCM 30 have a large temperature difference between the inside and the outside of the enclosure 10. Will be released to the outside. Therefore, the PCM 30 of the liquid phase is changed to a solid state again and in the morning it repeats the above process again.

As such, the present invention exhibits a synergistic effect (synergistic effect) by acting in combination with the PCM 30 and the heat sink 40, and thus, despite the large temperature change outside the enclosure 10 as shown in FIG. The difference between the internal maximum and minimum temperatures can be narrowed. Specifically, the diagram shows that the temperature inside the enclosure 10 decreases in half when the PCM 30 is used than when the PCM 30 is not applied. Stable operation of the communication device 20 can be maintained within the temperature range of the enclosure 10 to -10 ~ 60 ℃. In the present invention, as a result of the test under the above-described conditions, as shown in FIG. 6, the temperature of any position in the enclosure 10 was measured and found to be within the above range and stable. That is, in FIG. 6, when the temperature of the enclosure 10 is gradually lowered from the highest point inside the enclosure 10, the results of measuring the second point, the third point, and the bottom are all within the allowable range. Can be.

As can be seen from the diagrams of Figs. 5 and 6, when cooling the inside of the enclosure 10 by the combined action of the PCM 30 and the heat sink 40 as in the present invention, without employing the PCM (30) Compared to the case where only the heat sink 40 is employed, the temperature inside the enclosure 10 is kept within the allowable range for the communication equipment 20 to operate stably, and the temperature change inside the enclosure 10 is reduced to reduce the temperature of the equipment. Operational stability can be increased.

The embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment, the present invention Various changes and modifications are possible within the scope without departing from the spirit of the invention, as well as other equivalent embodiments.

The present invention has the following advantages compared to the method using a cooling fan. First, the PCM (PCM) can be used for more than 10 years once installed, and the aluminum heat sink can be used almost permanently, so it is very economical since it requires little maintenance cost after installation. Second, because no cooling fan is used, there is no fan wind, which does not cause discomfort to passengers. Third, it is economical because no electricity is consumed. Fourth, it is environmentally friendly because no fan noise is generated. Finally, the present invention has the advantage of excellent cooling performance by synergistic effect between the PCM and the heat sink.

Claims (5)

In the enclosure protecting communication equipment, It provides a storage space defined by a plurality of walls and the top plate and the bottom plate, the wall is made of a heat sink for dissipating heat inside the enclosure to the outside, And a phase change material disposed above the storage space to absorb and store heat generated from the communication equipment and to release heat when the internal temperature drops to a predetermined temperature. The communication box housing according to claim 1, wherein the PCM is a paraffin-based material stored in a thin aluminum rectangular extrusion case. According to claim 1, wherein the heat sink is a communication equipment accommodating compartment characterized in that the heat radiation fins are configured to combine at least two of the side and the side of the unit heat sink protruding on both sides. According to claim 3, wherein the one end of the heat sink is provided with a male portion and the other end is provided with a female portion is coupled to the male portion of the heat sink is unevenly coupled. 5. The communication device accommodating housing according to claim 4, wherein the male part is composed of a double circular protrusions connected to each other, and the female part has a shape of a circular double groove into which the circular protrusions are inserted.