KR102646146B1 - A cooling apparatus for display and a display device using the same - Google Patents

Abstract

The present invention is a cooler that simplifies the structure, increases heat exchange efficiency, and slims the display device, and a display device using the same. It applies a heat pipe through which refrigerant flows inside and a fin structure to increase the heat exchange cross-sectional area, and the heat pipe We provide a cooler structure that operates in a circular manner to allow efficient refrigerant flow and a display device to which it is applied.

Description

Cooler for display and display device using the same {A COOLING APPARATUS FOR DISPLAY AND A DISPLAY DEVICE USING THE SAME}

The present invention relates to a cooler used in a display device, and more specifically, to a cooler capable of simplifying the structure, increasing heat exchange efficiency, and slimming the display device, and a display device using the same.

LCD (liquid crystal display) and OLED (organic light emitting diode), which are widely used as displays, can be manufactured in a flat shape and are becoming larger in area. If the temperature of the display rises, there is a risk that it may malfunction and cause errors such as not displaying the screen, so while the display is operating, it is also cooled.

There are various causes that increase the temperature of the display, such as the temperature of the surrounding environment and the heat generated when the surrounding environment is bright and the display becomes brighter. In particular, as displays become larger in size, efficient cooling of displays is more urgently needed.

Considering this, conventionally, an air circulation path was created that circulates around the front and back of the display, and a cooling structure was applied that allows the air to circulate and discharge heat to the outside. The circulating air passes through a heat exchanger that discharges heat to the outside.

Since the above-mentioned circulating air passes through the front of the display, there is a problem that foreign substances enter the front of the display when the circulating air is mixed with external air during the cooling process. Therefore, the above-mentioned circulating air is designed to circulate in an isolated state so as not to mix with external air. In order to prevent circulating air from mixing with external air, heat is discharged to the outside through heat conduction in the heat exchanger, and to increase heat conductivity, the cross-sectional area of the heat-conducting part must be large.

Considering this, most heat exchangers installed in conventional display devices were installed in the rear space of the display. Since it is possible to install a large-area heat exchanger in the rear space of the display corresponding to the area of the display, installing a heat exchanger behind the display is not a bad choice from the perspective of increasing heat conductivity.

However, the structure of these conventional heat exchangers becomes complicated because they must be installed to avoid the positions of various substrates or related components present behind the display, and it is particularly difficult to design or produce them for curved displays.

In particular, since the heat exchanger itself occupies a certain thickness, placing the heat exchanger behind the display increases the thickness of the display device, making it difficult to design a slim product.

In addition, in this conventional heat exchanger, the air circulating between the front and back of the display contacts external air with a partition wall in between, and heat is discharged to the outside through heat conduction through the partition wall. In this way, since the conventional heat exchanger is structured in that high-temperature air and low-temperature air must exchange heat through conduction with each other across a partition, the area of the partition must be large, the thickness of the partition must be thin, and the partition must be made of a material with high thermal conductivity. It had to be done.

Therefore, the conventional heat exchanger had to have a very complex structure, and in order to increase heat exchange efficiency, the volume of the heat exchanger had to be increased accordingly.

The present invention was developed to solve the problems of the prior art described above. By applying a heat exchanger that utilizes the heat absorption effect by evaporation of the refrigerant and the heat generation effect by condensation of the refrigerant, the structure is simplified and the heat exchange efficiency is increased while occupying less space. The purpose is to provide a cooler and a slim or compact display device by applying the same.

Another object of the present invention is to provide a cooling module and cooler that do not increase the thickness of the display device due to the cooling structure.

Another object of the present invention is to provide a cooling structure that can more intensively cool areas that generate more heat.

Another object of the present invention is to provide a cooling structure for a display device that facilitates maintenance of a fan that generates air flow.

In order to solve the above-described problem, the present invention applies a heat pipe through which the refrigerant flows and a fin structure to increase the heat exchange cross-sectional area, and a cooler structure in which the heat pipe is circular so that the refrigerant flows efficiently. Applies to display devices.

In particular, the circulating heat pipe extends vertically in the heat absorption section, allowing the refrigerant evaporated by heat absorption to easily move upward by buoyancy, and extends vertically in the heat generation section, so that the refrigerant condensed by heat generation easily loses its own weight. By allowing it to move downward, this further generates refrigerant circulation force within the heat pipe, thereby increasing heat exchange efficiency.

In particular, if the refrigerant of the circulating heat pipe is brought into contact with the first fin in the section where it evaporates, and the second fin is brought into contact with the section where the refrigerant of the circulating heat pipe condenses, the heat pipe and the heat pipe can be formed in a structure that circulates or flows air. Heat exchange between air occurs smoothly, further enhancing the cooling effect.

In particular, if the section where the circulation heat pipe generates heat is placed on the side of the display unit, the display device can be configured to be slimmer.

More specifically, the present invention includes: a closed air circulation path circulating in the front, rear, and sides of the display unit; an open air flow path flowing adjacent to the closed air circulation path; a first fin provided in the closed air circulation path; a second fin provided in the open air flow path; and an evaporation section that extends in the vertical direction and is in contact with the first fin in at least some sections, a gas phase section that extends from the evaporation section to an open air flow path, and a portion that extends in the up and down directions and that includes at least some sections. It provides a cooler for a display device including a condensation section in contact with the second fin, and a circulation heat pipe including a liquid phase section extending from the condensation section to a closed air circulation path.

According to this, the circulation heat pipe cools the air by absorbing the heat of the air circulating in the closed air circulation path in the evaporation section in contact with the first fin, and the refrigerant inside evaporates and rises to the top by buoyancy, promoting the circulation of the refrigerant. It will be done. And in the condensation section in contact with the second fin, heat is released to the air flowing in the open air flow path and cools the refrigerant inside. As a result, the refrigerant condenses and falls under its own weight, thereby promoting the circulation of the refrigerant.

In other words, the present invention applies a phase change between two phases of liquid and gas in the heat exchange process to significantly increase heat exchange efficiency, and also has a structure that promotes refrigerant circulation in the heat pipe, so heat exchange is very active and cooling is achieved. The effect can be significantly increased.

A circulation fan that induces air circulation in the closed air circulation path is disposed at the rear of the display unit and can induce air circulation without blocking the display surface.

The open air flow path includes a section that flows along the side of the display unit, thereby reducing the front-to-back depth of the display device, thereby enabling a slimmer design.

A duct is provided on the side of the display unit, and the open air flow path moves into a passage provided by the duct, so that the second fin and the heat pipe structure are not exposed to the outside, and the air flowing through the open air flow path is prevented from being exposed to the outside. can be allowed to flow intensively through the second fin and the heat pipe.

Air flowing in the open air flow path may be allowed to flow by a flow fan provided in the duct at a position spaced apart from the second fin. That is, the flow fan can be installed at the inlet or outlet of the duct, which makes maintenance of the fan very easy.

The open air flow path may be provided on at least one of the left or right side of the display unit. This is a very suitable position for the heat pipe to extend in the vertical direction in the condensation zone of the circulating heat pipe, and has a structure that does not increase the thickness of the display device.

The open air flow path may include a path flowing behind the display unit and behind the closed air circulation path. That is, in the cooler structure of the present invention, the location where the condensation space between the second fin and the heat pipe is provided is not necessarily limited to the side of the display unit, and may be provided at various other locations. Even if a condensation section is provided at the rear of the display unit, if the evaporation section of the heat pipe and the condensation section do not overlap in the thickness direction of the display device (front-back direction), the thickness of the display device will not increase or the increase in thickness can be minimized. . In this way, the evaporation section and condensation section of the heat pipe can be arranged so that they do not overlap. When using a heat pipe, the heat pipe can be placed in a part of the closed air circulation path, and the heat pipe can also be placed in a part of the open air flow path. Because it can be placed. This is clearly different from the conventional heat exchanger structure.

The first fin has a planar shape with a normal line in the vertical direction, and may include a structure in which a plurality of pins are stacked spaced apart in the vertical direction. Additionally, the evaporation section of the circulation heat pipe may penetrate and contact the first fin. Since the heat pipe in contact with the first fin includes a section extending in the vertical direction, if the structure of the first fin is configured in this way, the evaporation section of the first fin and the heat pipe can be easily implemented.

The second fin may have a planar shape with a normal line in the left and right directions and may include a structure in which a plurality of spaced apart structures are stacked in the left and right directions, or it may have a planar shape with a normal line in the front and rear directions and may include a structure in which a plurality of pins are spaced apart and stacked in the front and rear directions. . This structure allows for smooth flow of air moving in the vertical direction when an open air flow path is provided in the left or right room of the display unit while allowing the condensation period of the circulating heat pipe to extend in the vertical direction.

The second fin has a planar shape with a normal line in the vertical direction and may include a structure in which a plurality of fins are stacked spaced apart in the vertical direction. This structure is a structure that, when an open air flow path is provided at the rear of the display unit, allows the flow of air moving in the left and right directions to be smooth while allowing the condensation section of the circulating heat pipe to extend in the vertical direction.

Accordingly, the condensation section of the circulation heat pipe has a section extending in the vertical direction and can penetrate and contact the second fin.

The present invention also provides a display unit having a display surface; a housing containing the display unit and provided with an external communication port for an open air flow path; a front plate disposed in front and spaced apart from the display surface, defining a portion of a closed air circulation path; a closed air circulation path that circulates through a space between the display surface and the front panel, a side of the display unit, and a space behind the display unit; an open air flow path disposed adjacent to the closed air circulation path and communicating with an external communication port of the housing; and a path in which the refrigerant evaporates by absorbing heat in the closed air circulation path, the refrigerant condenses by generating heat in the open air flow path, and the refrigerant moves from the closed air circulation path to the open air flow path, and the open air. A display device including a heat exchanger including a heat pipe having a separate path for moving from a flow path to a closed air circulation path is provided. That is, the display device of the present invention can apply a heat pipe structure in a circular structure.

The section in the heat pipe where the refrigerant evaporates includes a portion extending in the vertical direction, so that the evaporated refrigerant can rise smoothly due to buoyancy.

The section in the heat pipe where the refrigerant condenses includes a portion extending in the vertical direction, so that the condensed refrigerant can be smoothly lowered by its own weight.

At least some of the sections where the refrigerant evaporates in the heat pipe may be in contact with the first fin provided in the closed air circulation path to promote heat absorption and evaporation of the refrigerant.

At least some of the sections where the refrigerant condenses in the heat pipe may be in contact with the second fin provided in the open air flow path to promote heat generation and condensation of the refrigerant.

A slim device can be implemented by allowing the open air flow path to include a path that flows along the side of the display unit.

The open air flow path is behind the display unit and includes a path that flows behind the closed air circulation path, so that the structure of the heat exchanger can be designed simply and a slim device can be implemented.

According to the present invention, the cooling structure of the display device can be compact and simplified, cooling efficiency can be significantly increased, and the thickness of the display device can be further reduced.

In addition, according to the present invention, parts that generate a lot of heat can be cooled more intensively, so the cooler can be designed more compactly.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

1 is a rear perspective view of a display device to which a cooling structure is applied as an embodiment according to the present invention, with the rear panel of the housing omitted;
Figure 2 is a rear view of a first embodiment of a display device applying the heat exchanger structure according to the present invention;
Figure 3 is a top view of the display device of Figure 2;
Figure 4 is a perspective view showing only the heat exchanger structure of the first embodiment;
Figure 5 is a rear view of a second embodiment of a display device applying the heat exchanger structure according to the present invention;
Figure 6 is a top view of the display device of Figure 5;
Figure 7 is a perspective view showing only the heat exchanger structure of the second embodiment;
Figure 8 is a plan view of a third embodiment of a display device applying the heat exchanger structure according to the present invention;
Figure 9 is a side view of the display device of Figure 8, and
Figure 10 is a plan view of a fourth embodiment of a display device applying the heat exchanger structure according to the present invention.

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

The present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. However, the present embodiments only serve to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. It is provided for information purposes only.

[Cooling structure applied to the display device]

Figure 1 is a rear view of a display device to which a cooling structure is applied as an embodiment according to the present invention, with the rear panel of the housing omitted.

The display unit 30, which includes a display such as LCD or OLED, is modularized and accommodated inside the housing 50. The front of the display unit 30 becomes a display surface 31 on which a screen is displayed, and this display surface 31 is arranged at a predetermined distance from the front panel 51 of the housing. That is, there is a gap between the front panel 51, which is made of a transparent material so that the display surface 31 can be seen from the outside, and the screen 31 of the display unit 30. This space will be described later. It forms part of a closed air circulation path, and air can circulate through these spaces.

A board and related components including a power circuit, a screen control circuit, etc. are installed on the rear of the display unit 30, which may be installed directly on the rear of the display unit 30 or through a bracket. At the rear of the display unit 30, a back plate 53 (see Figure 2 below) is disposed to cover the substrate and related components, and a predetermined space is also provided between the rear of the display unit 30 and the back plate 53 of the housing. given. This space also forms part of a closed air circulation path, which will be described later, through which air can circulate.

The first side plate 55 of the housing is provided on the short side of the four corners of the display device, and is connected to the front and rear plates to cover the left and right sides of the display device. Additionally, the second side plate 57 of the housing is provided on the long side of the four corners of the display device, and is connected to the front and rear plates to cover the upper and lower sides of the display device.

In this way, the housing 50 of the display device 10 embeds the display unit 30 and related components, which are internal components, and isolates it from external air.

A duct 70 serving as an open air flow path is installed on the short side of the four corners of the display unit 30. The open air flow path of the duct is provided along the longitudinal direction of the duct.

A closed air circulation path (CC) is provided in the space isolated from the outside by the housing 50. The closed air circulation path is a path that circulates through the space provided in front of the display unit 30, the space provided on the side of the display unit, and the space provided at the rear of the display unit within the housing, and the air circulating through this path is exposed to external air. Isolated so as not to mix with air.

A circulation fan 83 that circulates air is installed at the rear of the display unit 30 and moves air. As an example, the circulation fan 83 is provided at one rear end of the display unit 30, draws air from one short side of the display unit 30, and discharges it to the other short side of the display unit 30. The circulation fan can be placed in various other locations. For example, a circulation fan that circulates air along a closed air circulation path may be installed in various locations, such as on the side of the display unit or in front or behind the first fin of the heat exchanger, which will be described later.

The present invention illustrates a structure that circulates the front space of the display unit, the short side space of the display unit, the rear space of the display unit, and the other short side space of the display unit. However, the front space of the display unit and the long side space of the display unit are exemplified. Of course, it is possible to apply a structure that circulates the lateral space on one side, the space behind the display unit, and the space on the other long side of the display unit.

In addition, a structure that circulates all of the front space of the display unit, the long side space on one side and the short side space of the display unit, the rear space of the display unit, and the other long side space and short side space of the display unit can also be applied. In particular, a structure that circulates both the long side and the short side is difficult or unsuitable in a conventional air-to-air heat exchanger installation structure with a partition wall in between. However, in a structure such as the present invention in which a heat pipe and fin structure, which will be described later, is placed on the side of the display unit, heat exchange occurs on the side of the display, so a structure that circulates both the long side and the short side is applied. No problem.

[Heat exchanger structure]

Referring to Figure 4 or Figure 7, the heat exchanger having a cooler structure according to the present invention includes a first fin 81 disposed in the closed air circulation path (CC) and a second fin disposed in the open air flow path (OF). (72), and a circulation heat pipe (90) connecting the first fin (81) and the second fin (72) and containing a refrigerant therein.

A heat pipe is a device that quickly transfers heat from one side to the other side through evaporation of the fluid inside the heat pipe. This is a pipe in which the pressure has been reduced by exhausting the inside, and the internal space with many small holes is filled with volatile liquid (i.e. refrigerant). When heat is applied to one end of this pipe, the volatile liquid evaporates and moves to the other end with thermal energy. The evaporated gas radiates heat at the other end of the pipe and is liquefied, and the liquid returns to its original position by capillary action. This is about 50 times faster heat transfer than copper or aluminum, which have high thermal conductivity. The main body materials are copper, stainless steel, ceramic, and tungsten, and the inner wall is made of porous fiber. Internal volatile substances used include methanol, acetone, water, and mercury.

In the present invention, one technical feature is that the heat pipe is provided in the form of a closed loop that can circulate, rather than in the form of a bar with one end and the other end. And this circulating heat pipe can be divided into an evaporation section (91), a gas phase section (92), a condensation section (93), and a liquid phase section (94) according to the circulation order of the refrigerant.

The evaporation section of the circulation heat pipe is disposed in the closed air circulation path. In order to increase heat transfer efficiency between the air circulating in the closed air circulation path and the heat pipe, a first fin 81 may be in contact with the evaporation section 91. That is, at least a portion of the heat pipe portion of the evaporation section passes through the first fin and is in contact with the first fin. The first fin may be in the form of a flat plate and may have a structure in which a plurality of pins are stacked and spaced apart from each other.

In the gaseous section 92, the gaseous refrigerant in the heat pipe that absorbs heat and evaporates in the evaporation section 91 penetrates the partition dividing the closed air circulation path and the open air flow path to form a closed air circulation path. This is the heat pipe section from to the open air flow path.

The condensation section 93 is disposed in an open air flow path. In order to increase heat transfer efficiency between the heat pipe and the relatively cold air passing through the open air flow path, a second fin 72 may be in contact with the condensation section 93. That is, at least a portion of the heat pipe between condensation passes through the second fin and is in contact with the second fin. The second fin may be in the form of a flat plate and may have a structure in which a plurality of pins are stacked and spaced apart from each other.

In the liquid phase section 94, the liquid refrigerant in the heat pipe that generates heat and condenses in the condensation section 93 penetrates the partition dividing the open air flow path and the closed air circulation path and is closed from the open air flow path. This is the heat pipe section leading to the air circulation path.

The heat exchanger of the present invention not only has the heat pipe forming a circulation structure, but also includes a portion where the evaporation section 91 of the heat pipe extends upward and downward, and a portion where the condensation section 93 extends upward and downward. Another technical feature is that

According to the structure in which the evaporation section 91 of the heat pipe extends vertically, as the refrigerant evaporated by heat absorption within the heat pipe is vaporized, the density of the vaporized refrigerant becomes lower than that of the liquid refrigerant that has not yet been vaporized around it, creating buoyancy. It moves smoothly upward.

Then, the vaporized refrigerant moves along the gas phase section 92 and reaches the condensation section 93. The refrigerant that condenses by generating heat in the air flowing through the open air flow path in the condensation section has a higher density than the surrounding gaseous refrigerant and moves smoothly downward under its own weight.

Then, the liquefied refrigerant moves along the liquid phase section 94 and reaches the evaporation section 91 again. That is, according to the present invention, since at least a part of the evaporation section 91 and a part of the condensation section 93 extend in the vertical direction, circulation of the refrigerant in the heat pipe is possible.

Therefore, the refrigerant in the circulating heat pipe can circulate smoothly due to not only the capillary phenomenon but also the shape of the evaporation section and condensation section of the heat pipe. The conventional heat pipe structure was undesirable for rapid heat transfer in that the gaseous refrigerant and the liquid refrigerant moved in opposite directions within one pipe between one end at a high temperature and the other end at a low temperature. On the other hand, the circulation heat pipe according to the present invention provides a separate path 92 through which the gaseous refrigerant moves and a path 94 through which the liquid refrigerant moves and is configured in a circular manner, thereby enabling heat transfer to occur very quickly.

Hereinafter, the structure of a display device to which this heat exchanger structure is applied will be described by presenting several examples.

[First Embodiment]

FIG. 2 is a rear view of a first embodiment of a display device using the heat exchanger structure according to the present invention, FIG. 3 is a top view of the display device of FIG. 2, and FIG. 4 is a perspective view showing only the heat exchanger structure of the first embodiment.

Referring to Figures 2 to 4, the closed air circulation path includes a front plate 51, a rear plate 53 spaced apart from the rear of the front plate, and connecting the left and right short sides of the front plate and the rear plate. It is provided in a space defined by a first side plate 55 and a second side plate 57 connecting the upper and lower long sides of the front plate and the rear plate. Specifically, the closed air circulation path flows by the circulation fan 83 provided on the closed air circulation path, and the space between the front panel 51 and the display surface 31, the side of the display unit 30, and the above It circulates in the space between the side plates 55 and the space between the rear portion of the display unit 30 and the rear plate 53 of the housing. The air circulating in the space absorbs heat generated from the display unit or its electrical components and circulates through the path.

Among the closed air circulation paths, a first pin 81 in the shape of an elongated rectangle is disposed in the space between the rear portion of the display unit and the rear plate 53 of the housing. The first pin 81 is in the form of a flat plate with the vertical axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the vertical direction and are stacked. Although only two of these are shown in Figures 2 to 4, this is for convenience of understanding. The number and spacing of the first fins are such that heat exchange between the circulating air and the first fin can be smoothly achieved without excessively impeding air circulation. It can be changed within the scope.

A circulation heat pipe 90 is fixed through the first fin 81 in the vertical direction. That is, the heat pipes penetrating the first fin are in contact with each other through the penetrating portion. Therefore, the heat from the first fin is transferred to the heat pipe very quickly. The portion extending vertically through the first fin becomes the evaporation section 91. Although only two heat pipes are shown in Figures 2 to 4, this is to facilitate understanding, and the number and installation interval of heat pipes can be appropriately selected taking into account heat exchange efficiency and space securing issues. In the first embodiment, the first fin penetration positions of the heat pipe are arranged in a row at predetermined intervals along the longitudinal center of the first fin. The location or arrangement of these penetrations can also be appropriately selected taking into account heat exchange efficiency, space securing issues, and smooth flow of refrigerant within the heat pipe.

An open air flow path is provided on the first side plate 55 on either the left or right sides of the display device. The first embodiment presents an example in which the open air flow path is provided on only one side, but if necessary, it may be provided on both sides as in the second embodiment, which will be described later. An open air flow path can be implemented by a duct 70 extending along the longitudinal direction (i.e., vertical direction) of the first side plate 55. The duct 70 is provided in a form in which air communicates in an upward and downward direction, and a flow fan 74 is provided at the upper or lower end of the duct to cause air to flow upward or downward within the duct. Figure 2 illustrates a structure in which a flow fan 74 is provided at the bottom.

A second fin 72 in the shape of an elongated rectangle is disposed in the open air flow path within the duct. The second pin 72 is in the form of a plate having the front-back axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the front-back direction and are stacked. Although only two of these are shown in Figures 2 to 4, this is for convenience of understanding. The number and spacing of the second fins are such that heat exchange between the flowing air and the second fin can be smoothly achieved without excessively impeding air circulation. It can be changed within the scope.

The heat pipe 90 extends from the top of the evaporation section 91 toward the open air flow path, passes through the first side plate 55, and passes through the gas phase section 92 to the open air flow path. In addition, the condensation section 93 extending following the gas phase section 92 that reaches the open air flow path is fixed to the second pin 72 in the front-back direction and extends in the vertical direction. That is, the heat pipes penetrating the second fin are in contact with each other through the penetration portion. Therefore, the heat from the heat pipe is quickly transferred to the second fin.

The positions of the plurality of heat pipes penetrating the second fin are evenly distributed over the area of the second fin. To this end, the plurality of heat pipes are set at different positions at which they penetrate the second fin 72, and the portions other than those penetrating the second fin 72 extend vertically.

And the circulation heat pipe 90 extends from the lower part of the condensation section 93 back toward the closed air circulation path, and passes through the first side plate 55 to the evaporation section in the closed air circulation path ( It includes a liquid phase section 94 connected to the lower end of 91).

[Second Embodiment]

FIG. 5 is a rear view of a second embodiment of a display device using the heat exchanger structure according to the present invention, FIG. 6 is a top view of the display device of FIG. 5, and FIG. 7 is a perspective view showing only the heat exchanger structure of the second embodiment.

Referring to Figures 5 to 7, the closed air circulation path and the open air flow path are not much different from the first embodiment. The second embodiment is somewhat different from the first embodiment in the arrangement and structure of the heat exchanger, so the explanation will focus on these points. First, in the cooling structure according to the second embodiment, an open air flow path is provided on the first side plate 55 on both left and right sides of the display device. And the first fin, second fin, and circulation heat pipe are all left-right symmetrical.

A first fin 81 in the form of an elongated rectangle is disposed in the closed air circulation path. The first pin 81 is in the form of a flat plate with the vertical axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the vertical direction and are stacked.

The evaporation section 91 of the circulation heat pipe 90 is fixed to the first fin 81 in an upward and downward direction. In the second embodiment, the first fin penetration location of the heat pipe is arranged to be biased forward or backward at predetermined intervals along the longitudinal direction of the first fin. Accordingly, as the gas phase sections 92 following each of the two evaporation sections 91 extend into an open air flow path, they are appropriately distributed in space so that they do not overlap each other.

A second fin 72 in the shape of an elongated rectangle is disposed in the open air flow path within the duct. The second pin 72 is in the form of a flat plate with the left-right axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the left-right direction and are stacked.

The condensation section 93 of the heat pipe 90 is fixed to the second fin 72 in the left and right directions and extends in the vertical direction. More specifically, the condensation section 93 of the heat pipe extends in a direction away from the closed air circulation path and is fixed by penetrating the second fin in the left and right directions, and the heat pipe passing through the second fin moves up and down. It includes a part extending in a direction, and a part extending from the lower end of the heart pipe extending in the vertical direction in a direction approaching the closed air circulation path, penetrating the second pin in the left and right directions, and being fixed. That is, one heat pipe penetrates the second fin twice.

And the liquid acid section 94 of the circulation heat pipe 90 extends from the condensation section 93 back toward the closed air circulation path, penetrating the first side plate 55, and forming the closed air circulation path. It is connected to the lower part of the evaporation section (91).

In the case of the second embodiment, the bending part of the heat pipe is smaller than that of the first embodiment, so the refrigerant flowing in the heat pipe can circulate more smoothly.

[Third Embodiment]

FIG. 8 is a plan view of a third embodiment of a display device using the heat exchanger structure according to the present invention, and FIG. 9 is a side view of the display device of FIG. 8.

Referring to FIGS. 8 and 9, unlike the first and second embodiments, in the third embodiment, the open air flow path is disposed behind the display unit 30 and behind the closed air circulation path. According to the present invention, the air flowing in the open air flow path and the air flowing in the closed air circulation path do not contact each other and exchange heat, but form a heat exchange structure in which heat is transferred by a heat pipe, so the open air flow path is There is no need to place it behind the display unit and inside the roof of the closed air circulation path.

As shown, the air in the closed air circulation path flows and circulates in the left and right directions by the circulation fan 83 in the front and rear spaces of the display unit. In addition, the air in the open air flow path also flows in the left and right directions by the flow fan 74 in the duct 70 provided at the rear of the closed air circulation path.

Among the closed air circulation paths, a first pin 81 in the shape of an elongated rectangle is disposed in the space between the rear portion of the display unit and the rear plate 53 of the housing. The first pin 81 is in the form of a flat plate with the vertical axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the vertical direction and are stacked.

A second fin 72 in the shape of an elongated rectangle is disposed in the open air flow path. The second pin 72 is in the form of a flat plate with the vertical axis as its normal line, and has a structure in which a plurality of pins are spaced apart from each other along the vertical direction and are stacked.

The evaporation section 91 of the circulation heat pipe 90 is fixed through the first fin 81 in the vertical direction. And the gas phase section 92 extending from the upper part of the evaporation section 91 extends near the second pin 72 through the rear plate 53 of the housing. A condensation section 93 is fixed through the second pin 72 in the vertical direction. And the liquid phase section 94 extending from the lower part of the condensation section 93 penetrates the back plate 53 of the housing and continues to the lower part of the evaporation section 91.

According to the third embodiment, the width of the display device in the left and right directions can be reduced, the gas phase section and the liquid phase section of the heat pipe can be formed shorter, and the circulation heat pipe can be simply constructed.

[Fourth Embodiment]

Figure 10 is a plan view of a fourth embodiment of a display device applying the heat exchanger structure according to the present invention.

In contrast to the third embodiment, in the fourth embodiment shown in FIG. 10, in order to reduce the front-to-back width of the display unit, the second fin of the open air flow path provided at the rear of the closed air circulation path is used in the display device. It is arranged so as not to overlap the first fin provided in the closed air circulation path in the thickness direction (forward-backward direction). Additionally, if the first and second pins are divided and provided as shown, it is easier to arrange them so that they do not overlap in the thickness direction. According to this structure, the thickness of the display device cannot be increased or the increase in thickness can be minimized.

Next, the housing back plate 53 in the area where the first and second pins are adjacent is disposed with an inclined surface to facilitate air flow in the two paths (CC, OF). Therefore, even if there is some change in the cross-sectional area of the air movement path, the inclined surface guides the air flow, enabling smooth air circulation or flow.

Except for the fact that the first and second pins are each divided, the first and second pins both have a structure in which flat fins with the vertical axis as the normal line are stacked spaced apart in the vertical direction, and the first and second pins penetrate through them. Since the structure of the circulation heat pipe 90 that circulates is also similar to that of the third embodiment, redundant description thereof will be omitted.

Previously, in the first to fourth embodiments, a structure in which the heat pipes 90 and fins 81 of the heat exchanger were disposed entirely in the space of the closed air circulation path was illustrated. However, these heat pipe and fin structures may be partially prepared by considering the volume occupied by other components of the display device. Additionally, it can be configured to absorb heat from that space more intensively by placing it close to internal components that generate a lot of heat.

Hereinafter, the cooling operation of the display device using the heat exchanger according to the present invention will be described.

When the display device is operated, heat is generated from the display unit and the chips of the PCB installed behind it. The circulation fan 83 and the flow fan 74 cause air circulation in a closed air circulation path and air flow in an open air flow path, respectively.

The air circulating in the closed air circulation path absorbs and circulates heat generated from the display unit and accessories, and contacts the first fin located behind the display unit to transfer the heat to the first fin. Then, the heat of the first fin 81 is transferred to the evaporation section 91 of the heat pipe 90, and the refrigerant inside evaporates due to the heat absorbed by the heat pipe and rises with buoyancy. When the refrigerant evaporates, the heat of vaporization is absorbed, further increasing the amount of heat absorption of the refrigerant. The vaporized refrigerant moves through the gas phase section 92 into an open air flow path. In other words, the heat absorbed in the closed air circulation path is quickly transferred to the second fin in the open air flow path through conduction of the heat pipe itself and the vaporized refrigerant inside the heat pipe.

Since the temperature of the air flowing in the open air flow path is lower than the temperature of the condensation section 93 and the second fin 72 of the heat pipe, the gaseous refrigerant in the condensation section 93 flows through the open air flow path. It transfers heat to the air in the path, condenses itself and generates condensation heat, and transfers more heat to the air in the open air flow path.

Meanwhile, the condensed refrigerant quickly descends due to its own weight and returns to the evaporation section 91 of the closed air circulation path through the liquid phase section 94.

Therefore, a display device using the heat exchanger structure of the present invention can achieve very efficient cooling. And since efficient heat exchange is possible while occupying a small volume, the display device can be designed to be compact and slim.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

CC: Closed air circulation path
OF: Open air flow path
10: Display device
30: display unit
31: display side
50: housing
51: front panel
53: back panel
55: 1st side plate (left and right short sides)
57: Second side plate (upper and lower long sides)
70: duct
72: 2nd pin (OF)
74: Flow fan (OF)
81: 1st pin (CC)
83: Circulating fan (CC)
90: Circulating heat pipe
91: Evaporation section
92: Gas phase section
93: Condensation period
94: Liquid phase section

Claims (21)

A closed air circulation path that circulates around the front, rear, and sides of the display unit;
an open air flow path flowing adjacent to the closed air circulation path;
An evaporation section including a portion provided in the closed air circulation path and extending in the vertical direction, a gas phase section extending from the evaporation section to an open air flow path, and a portion provided in the open air flow path and extending in the vertical direction. A circulation heat pipe including a condensation section, and a liquid phase section provided separately from the gas phase section and extending from the condensation section to a closed air circulation path,
The gas phase section is provided in a section between the upper part of the evaporation section and the upper part of the condensation section, and the liquid phase section is provided in a section between the lower part of the condensation section and the lower part of the evaporation section.
In claim 1,
a first fin provided in the closed air circulation path; and
It further includes a second fin provided in the open air flow path,
The evaporation section is in contact with the first fin at least in some sections, and the condensation section is in contact with the second fin in at least some sections.
In claim 1,
A circulation fan that induces air circulation in the closed air circulation path is a cooler for a display device disposed at the rear of the display unit.
In claim 2,
The open air flow path is a cooler for a display device including a path that flows along a side of the display unit.
In claim 4,
A cooler for a display device, wherein a duct is provided on a side of the display unit, and the open air flow path moves into a flow path provided by the duct.
In claim 4,
A cooler for a display device in which the air flowing in the open air flow path flows by a flow fan provided in a duct at a position spaced apart from the second fin.
In claim 4,
The open air flow path is provided in at least one of the left or right side of the display unit.
In claim 2,
The open air flow path is behind the display unit and includes a path flowing behind the closed air circulation path.
In claim 4 or claim 8,
The first fin has a planar shape with a normal line in the vertical direction, and the cooler for a display device includes a structure in which a plurality of fins are spaced apart in the vertical direction.
In claim 9,
A cooler for a display device in which the evaporation section of the circulation heat pipe penetrates and touches the first fin.
In claim 4,
The second fin has a planar shape with normal lines in the left and right directions, and the cooler for a display device includes a structure in which a plurality of fins are spaced apart from each other in the left and right directions.
In claim 4,
The second fin has a planar shape with a normal line in the front-back direction, and the cooler for a display device includes a structure in which a plurality of fins are spaced apart from each other in the front-back direction.
In claim 8,
The second fin has a planar shape with a normal line in the vertical direction, and the cooler for a display device includes a structure in which a plurality of fins are spaced apart in the vertical direction.
The method according to any one of claims 11 to 13,
A cooler for a display device in which the condensation section of the circulation heat pipe penetrates and touches the second fin.
A display unit having a display surface;
a housing containing the display unit and provided with an external communication port for an open air flow path;
a front plate disposed in front and spaced apart from the display surface, defining a portion of a closed air circulation path;
a closed air circulation path that circulates through a space between the display surface and the front panel, a side of the display unit, and a space behind the display unit;
an open air flow path disposed adjacent to the closed air circulation path and communicating with an external communication port of the housing; and
The refrigerant evaporates by absorbing heat in the closed air circulation path, the refrigerant condenses by generating heat in the open air flow path, and the refrigerant moves from the closed air circulation path to the open air flow path, and the open air flow. It includes a heat exchanger including a heat pipe having a separate path moving from the path to the closed air circulation path,
A display device wherein the section in the heat pipe where the refrigerant evaporates includes a portion extending in the vertical direction.
delete In claim 15,
A display device wherein the section in the heat pipe where the refrigerant condenses includes a portion extending in the vertical direction.
A display unit having a display surface;
a housing containing the display unit and provided with an external communication port for an open air flow path;
a front plate disposed in front and spaced apart from the display surface, defining a portion of a closed air circulation path;
a closed air circulation path that circulates through a space between the display surface and the front panel, a side of the display unit, and a space behind the display unit;
an open air flow path disposed adjacent to the closed air circulation path and communicating with an external communication port of the housing; and
The refrigerant evaporates by absorbing heat in the closed air circulation path, the refrigerant condenses by generating heat in the open air flow path, and the refrigerant moves from the closed air circulation path to the open air flow path, and the open air flow. It includes a heat exchanger including a heat pipe having a separate path moving from the path to the closed air circulation path,
A display device in which at least a portion of the section in which the refrigerant evaporates from the heat pipe is in contact with the first fin provided in the closed air circulation path.
A display unit having a display surface;
a housing containing the display unit and provided with an external communication port for an open air flow path;
a front plate disposed in front and spaced apart from the display surface, defining a portion of a closed air circulation path;
a closed air circulation path that circulates through a space between the display surface and the front panel, a side of the display unit, and a space behind the display unit;
an open air flow path disposed adjacent to the closed air circulation path and communicating with an external communication port of the housing; and
The refrigerant evaporates by absorbing heat in the closed air circulation path, the refrigerant condenses by generating heat in the open air flow path, and the refrigerant moves from the closed air circulation path to the open air flow path, and the open air flow. It includes a heat exchanger including a heat pipe having a separate path moving from the path to the closed air circulation path,
A display device in which at least a portion of the section where the refrigerant condenses in the heat pipe is in contact with the second fin provided in the open air flow path.
In claim 15,
A display device wherein the open air flow path includes a path that flows along a side of the display unit.
In claim 15,
The open air flow path is behind the display unit and includes a path flowing behind the closed air circulation path.

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