JP2004169943A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device capable of cooling the inside of a room or a cooled object by radiating infrared ray from a closed indoor space through a glass. <P>SOLUTION: This cooling device 1 comprises a Peltier element 4 having a heat absorbing part absorbing heat by energization and a heating part emitting heat, a heat radiating plate 3 for connecting the heat radiation part of a thermoelectric cooling element thereto, absorbing heat emitted from the Peltier element 4, and discharging infrared ray by heat radiation, and an optical solar reflector 2 having a metallic thin-film of deposited glass thin-film thereon, reflecting visible light, and allowing infrared ray to be transmitted therethrough. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooling device that can cool a room or an object to be cooled by transmitting infrared light through a glass from a closed room.
[0002]
[Prior art]
At present, thermal measures are very important in office buildings, especially in buildings called data centers where many computers are installed, but it is generally impossible to improve the cooling capacity of existing air conditioning systems. extremely difficult.
[0003]
For example, in a conventional air-conditioning system using a refrigerant gas, when the air conditioner is first laid in a building, there is naturally a limit in the cooling capacity due to the relationship between the amount of usable cooling water and the compression capacity of the refrigerant gas. Therefore, in order to increase the cooling capacity, various works such as changing the cooling cycle and laying the refrigerant gas piping must be performed, and it is not easy to change the air conditioning system of the building. In such a situation, there is a new air conditioning system using a Peltier element (for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-5-10543
[Problems to be solved by the invention]
However, it is very difficult to apply such an air conditioning system to an existing building. Although it may be possible to lay the construction relatively easily with ordinary houses, high-rise buildings where windows cannot be opened or closed spaces such as data centers secure even heat-dissipating spaces. Laying work cannot be performed easily. It was very difficult to apply any conventional air conditioning system to an existing building, so a new cooling device that did not require any construction was needed.
[0006]
In view of the above circumstances, the present invention provides a cooling device that can cool a room or an object to be cooled by transmitting infrared rays from a closed room and emitting infrared light without changing existing facilities. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a cooling device according to the first aspect of the present invention has a heat absorbing surface that absorbs heat when energized, and a heat radiating surface that emits heat. The thermoelectric cooling element in which the heat absorbing surface is arranged, and the heat radiating surface of the thermoelectric cooling element is joined to one surface, absorbs heat generated by the thermoelectric cooling element, and emits infrared rays by heat radiation from the other surface. The radiating plate to be radiated and one surface are arranged in close contact or separated over the entire surface of the other surface of the radiating plate, and the other surface is disposed toward the radiating space, reflects visible light, and reflects infrared light. And a heat control mirror that transmits light.
[0008]
According to the first aspect of the present invention, the thermoelectric cooling element absorbs the surrounding heat in the specific space and emits the absorbed heat as infrared rays from the radiator plate, so that there is no need to change existing facilities, and the window glass It is possible to cool the room by utilizing such factors.
[0009]
The cooling device according to the second aspect of the present invention has a heat absorbing surface that absorbs heat when energized, and a heat radiating surface that generates heat, and the heat absorbing surface is disposed with respect to a space to be cooled. A thermoelectric cooling element, a heat pipe joined to the heat absorbing portion of the thermoelectric cooling device and transmitting heat generated by the object to be cooled to the heat absorbing portion, and the heat dissipation surface of the thermoelectric cooling element joined to one surface. A radiator plate that absorbs heat generated by the thermoelectric cooling element and emits infrared rays by heat radiation from the other surface, and one surface is closely attached or separated over the entire surface of the other surface of the radiator plate. And a heat control mirror, the other surface of which is disposed toward the heat radiation space and reflects visible light and transmits infrared light.
[0010]
According to the invention of claim 2, since the heat pipe absorbs heat of the equipment to be locally cooled and emits the absorbed heat as infrared rays from the radiator plate, there is no need to change existing equipment, and the window glass and the like can be removed. It is possible to cool the equipment to be locally cooled by utilizing it.
[0011]
A cooling device according to a third aspect of the present invention is the cooling device according to the first or second aspect, wherein the cooling device includes a solar cell as a power supply or an auxiliary power supply for the thermoelectric cooling element. .
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
<First embodiment>
FIG. 1 shows a schematic diagram of a configuration of a cooling device 1 according to the first embodiment. The cooling device 1 according to the first embodiment includes an optical solar reflector 2 (hereinafter, abbreviated as OSR2) as a heat control mirror, a radiator plate 3, a Peltier device 4 as a thermoelectric cooling device, and a DC power supply. Is done. 2 and 3 are examples of the cooling device 1 according to the first embodiment. FIG. 2 is a diagram of the cooling device 1 viewed from the OSR 2 side (a transparent view from above), and FIG. 2 is an example of an internal structure when the device 1 is viewed from the Peltier element 4 side.
[0013]
As shown in FIG. 2, the cooling device 1 has a frame for attaching the OSR 2 and the heat sink 3, and is configured in a screen shape.
[0014]
OSR2 is a metal thin film formed by depositing aluminum or silver on a glass plate such as quartz glass or borosilicate glass, and has a property of reflecting visible light and a property of transmitting infrared light. In the first embodiment, the OSR 2 is mounted on the sunlight incident side of the cooling device 1 to prevent a rise in temperature due to light absorption by reflecting visible light, and to transmit the infrared light through the cooling device 1. It plays a role in promoting heat radiation.
[0015]
The thickness of the glass plate of OSR2 may be about 100 to 200 μm, but the thickness of the glass plate may be further reduced in order to improve the heat radiation effect and reduce the weight. The OSR 2 may be attached so as to be in close contact with the radiator plate 3 or may be attached at a fixed interval from the radiator plate 3. However, since the OSR 2 is extremely thin as described above, the OSR 2 support frame (shown in FIG. Needless to say). Also, a part of the heat sink 3 can be used as a substitute for the frame.
[0016]
The radiator plate 3 is formed of a metal or ceramic having a high thermal conductivity, such as copper, aluminum, aluminum nitride, or silicon nitride, and plays a role of releasing heat generated by the Peltier device 4. Further, as shown in FIG. 2, the heat radiating plate 3 is sandwiched by left and right frames (shaded portions in FIG. 2) so as to stand upright.
[0017]
Further, by providing the radiation fins as shown in FIGS. 2 and 3, the surface area is increased, and the radiation effect can be further enhanced by applying a black paint to the radiation fins. The shape of the radiation fins shown in FIGS. 2 and 3 (including the shape of the quadrangular pyramid indicated by the dashed line in FIG. 2) is an example, and is not limited thereto.
[0018]
A plurality of Peltier elements 4 are joined to the heat sink 3 according to the size of the cooling device 1 or the cooling capacity. Further, each Peltier element 4 is connected to a DC power supply such that the surface in contact with the heat radiating plate 3 is on the heat radiating side, and plays a role of cooling the surroundings by absorbing heat from the heat absorbing side. Also, by using silicon grease containing a powder of diamond, silver, aluminum, or the like or a heat conductive sheet (graphite sheet) on the joint surface between the Peltier element 4 and the heat sink 3, both are joined without gaps. Heat is efficiently transmitted to the heat sink 3.
[0019]
Note that the DC power supply is not particularly limited as long as it is a rectified commercial power supply. Further, a solar cell may be used as a DC power supply or its auxiliary power supply.
[0020]
FIG. 4 shows an installation example of the cooling device 1 according to the first embodiment.
[0021]
As shown in FIG. 4, the cooling device 1 is installed near a window glass and connected to a DC power supply. When a current flows through the Peltier device 4, the Peltier device 4 absorbs the surrounding heat from its heat absorbing surface and simultaneously releases the absorbed heat to the heat radiating plate 3 from the heat radiating surface.
[0022]
On the other hand, visible light of sunlight entering through the window glass is reflected by OSR2. In addition, although infrared rays included in sunlight pass through the OSR 2, they are absorbed by the heat radiating plate 3, so that invasion of heat from the outside can be prevented.
[0023]
The radiator plate 3 is heated by absorbing the heat generated by the Peltier element 4 and the heat (infrared rays) entered from the outside. The heated radiator plate 3 emits heat radiation, and the absorbed heat becomes infrared rays, passes through the OSR 2 and the window glass, and is released outside the room.
[0024]
As described above, the Peltier element 4 absorbs the surrounding heat and emits the heat from the heat sink 3, so that the room can be cooled.
[0025]
<Second embodiment>
A second embodiment will be described with reference to FIG. The components having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0026]
FIG. 5 shows a schematic diagram of a configuration of a cooling device 1 according to the second embodiment. The cooling device 1 according to the second embodiment includes an OSR 2, a heat sink 3, a Peltier element 4, a heat pipe 5, and a DC power supply.
[0027]
The heat pipe 5 is a heat conducting element having an appropriate amount of hydraulic fluid and a groove for promoting its reflux in a vacuumed pipe, and transfers heat in the following cycle.
[0028]
First, the working fluid is heated and evaporated at one end (heat input section) of the heat pipe 5. The evaporated hydraulic fluid moves to the other end (radiator) due to the pressure difference, and is cooled and condensed. The condensed working fluid is returned to the heating section by the groove, and is heated again. By repeating this cycle, heat can be transferred from the heat input section to the heat radiating section.
[0029]
In the second embodiment, a heat radiating portion of the heat pipe 5 is joined to a heat absorbing side of the Peltier element 4 and a specific portion is cooled by attaching a heat input portion to a device (or a place) to be locally cooled. .
[0030]
The joining structure between the heat radiating portion of the heat pipe 5 and the heat absorbing side of the Peltier element 4 is not particularly limited. For example, similarly to the joining of the Peltier element 4 and the heat radiating plate 3, the efficiency can be improved by using silicon grease or a heat conductive sheet. Conducts heat to the Peltier element 4 well. In addition, the heat dissipation portion of the Peltier element 4 and the heat pipe 5 is covered with a heat insulating material, thereby preventing a decrease in cooling efficiency caused by the Peltier element 4 absorbing surrounding heat.
[0031]
Also in the second embodiment, similarly to the installation example shown in FIG. 4, the cooling device 1 is installed near a window glass and connected to a DC power supply.
[0032]
When the heat input section of the heat pipe 5 is attached to the device to be locally cooled, the working fluid in the heat pipe 5 circulates by the heat generated by the device, and the heat of the device to be locally cooled moves to the heat radiating portion.
[0033]
When a current flows through the Peltier element 4, the Peltier element 4 absorbs heat from the heat radiating portion of the heat pipe 5 and simultaneously releases the absorbed heat to the heat radiating plate 3 from the heat radiating surface.
[0034]
On the other hand, visible light of sunlight entering through the window glass is reflected by OSR2. In addition, although infrared rays included in sunlight pass through the OSR 2, they are absorbed by the heat radiating plate 3, so that invasion of heat from the outside can be prevented.
[0035]
The radiator plate 3 is heated by absorbing the heat generated by the Peltier element 4 and the heat (infrared rays) entered from the outside. The heated radiator plate 3 emits heat radiation, and the absorbed heat becomes infrared rays, passes through the OSR 2 and the window glass, and is released outside the room.
[0036]
As described above, since the heat pipe 5 absorbs heat of the device to be locally cooled and emits the heat from the radiator plate 3, it becomes possible to cool the device to be locally cooled.
[0037]
<Other embodiments>
In the summer, the inside of the car left under the scorching sun becomes very hot. As a countermeasure against the heat inside the car left under the scorching sun, a sunshade screen or the like is generally used, but the heat is still trapped inside the sealed car. Therefore, an example in which the cooling device 1 of the present invention is applied to such a case will be described.
[0038]
FIG. 6 shows an example in which the cooling device 1 of the present invention is applied to measures against heat in a vehicle. As shown in FIG. 6, the cooling device 1 is installed on a sunroof, a windshield or a rear glass. Although the power supply of the Peltier element 4 can be taken from a power supply socket (battery) in the vehicle, the battery may run out if left unattended for a long time. Therefore, a solar cell is installed in a cover or roof of a hood or a trunk room, or in a vehicle (door glass or the like), and the solar cell is used as a power source (in FIG. 6, the solar cell is not shown).
[0039]
When the current generated by the solar cell flows through the Peltier device 4, the Peltier device 4 absorbs the surrounding heat from its heat absorbing surface and simultaneously releases the absorbed heat to the heat radiating plate 3 from the heat radiating surface.
[0040]
On the other hand, the visible light of sunlight entering through the sunroof, the front glass, and the rear glass is reflected by the OSR 2. In addition, although infrared rays included in sunlight pass through the OSR 2, they are absorbed by the heat radiating plate 3, so that invasion of heat from the outside can be prevented.
[0041]
The radiator plate 3 is heated by absorbing the heat generated by the Peltier element 4 and the heat (infrared rays) entered from the outside. The heated radiator plate 3 emits heat radiation, and the absorbed heat is converted to infrared rays and transmitted through the OSR 2 and the windshield and the rear glass to be released outside the vehicle.
[0042]
By using the cooling device 1 in this manner, even in a closed space such as an automobile, it is possible to actively cool the room and release heat to the outside.
[0043]
In the present embodiment, the cooling device 1 has a screen-like structure, but is not particularly limited to such a structure.
[0044]
【The invention's effect】
As described above, according to the present invention, the thermoelectric cooling element absorbs the surrounding heat in the specific space and emits the absorbed heat as infrared rays from the radiator plate, so that there is no need to change existing equipment. It is possible to cool the room using window glass or the like.
[0045]
In addition, since the heat pipe absorbs the heat of the equipment to be locally cooled and emits the absorbed heat as infrared rays from the heat sink, there is no need to change the existing equipment, and you want to locally cool the equipment using window glass etc. The equipment can be cooled.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a cooling device according to a first embodiment.
FIG. 2 is a view of the cooling device as viewed from an OSR side.
FIG. 3 is an internal structural view of the cooling device as viewed from a Peltier device side.
FIG. 4 is a diagram illustrating an example of installation of a cooling device according to the first embodiment.
FIG. 5 is a schematic configuration diagram of a cooling device according to a second embodiment.
FIG. 6 is a diagram showing another embodiment.
[Explanation of symbols]
1 cooling device 2 optical solar reflector (OSR)
3 Heat sink 4 Peltier element 5 Heat pipe

Claims (3)

A thermoelectric cooling element having a heat absorbing surface that absorbs heat by being energized, and a heat radiating surface that emits heat, wherein the heat absorbing surface is disposed with respect to a cooled space,
The heat dissipation surface of the thermoelectric cooling element is joined to one surface, absorbs heat generated by the thermoelectric cooling element, and emits infrared rays by heat radiation from the other surface,
A heat control mirror, one surface of which is disposed in close contact or separated over the entire surface of the other surface of the heat sink, and the other surface is disposed toward the heat radiation space, reflects visible light, and transmits infrared light. ,
A cooling device comprising: A thermoelectric cooling element having a heat absorbing surface that absorbs heat by being energized, and a heat radiating surface that emits heat, wherein the heat absorbing surface is disposed with respect to a cooled space,
A heat pipe joined to the heat absorbing portion of the thermoelectric cooling element and transmitting heat generated by the object to be cooled to the heat absorbing portion;
The heat dissipation surface of the thermoelectric cooling element is joined to one surface, absorbs heat generated by the thermoelectric cooling element, and emits infrared rays by heat radiation from the other surface,
A heat control mirror, one surface of which is disposed in close contact or separated over the entire surface of the other surface of the heat sink, and the other surface is disposed toward the heat radiation space, reflects visible light, and transmits infrared light. ,
A cooling device comprising: The cooling device according to claim 1, further comprising a solar cell as a power supply or an auxiliary power supply for the thermoelectric cooling element.

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