KR101953793B1 - Lighting device using thermoelectric module - Google Patents

Abstract

The present invention provides an illuminator using a thermoelectric module, comprising: a thermoelectric module which is positioned on the ground and produces electric power by the temperature difference between both side surfaces of a heating source unit and a cooling source unit; a transparent cover which covers the thermoelectric module; a storage battery which is to store electricity generated by the thermoelectric module; an illuminator which provides lighting by sing the electric power supplied by the storage battery; a water heating module which is in contact with the heating source unit and stores heating water therein; a water cooling module which is in contact with the cooling source unit and stores cooling water therein; and a reflector which inclines concavely from the thermoelectric module in order to collect sunlight in the water heating module. In addition, the thermoelectric module produces electric power by the temperature difference generated by both the water heating module heated directly by the sunlight or indirectly by heat collection formed inside the cover, and the water cooling module cooled by geothermal heat. Therefore, the illuminator including a self-generating thermoelectric module can improve electric power production efficiency of the thermoelectric module.

Description

[0001] LIGHTING DEVICE USING THERMOELECTRIC MODULE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminator using a thermoelectric module, and more particularly, to an illuminator capable of generating electricity by using a thermoelectric module for generating electric power by a temperature difference between solar heat and geothermal heat.

Generally, illuminators are used to convert electric energy into light energy to provide light to identify objects in indoor, outdoor, or enclosed spaces at night. Currently, the most frequently used illuminators are incandescent lamps, fluorescent lamps, halogen lamps , Mercury lamps, sodium halides, metal halides, and LEDs.

On the other hand, in order to drive the illuminator, a commercial power supply is generally used because electric power is required. However, in recent years, attention has been focused on improving energy consumption efficiency, and accordingly, power generated by using renewable energy such as solar energy It is also used.

There are various methods of producing electric power using solar energy, and recently, a method of generating electric power by using a thermoelectric module (or a thermoelectric element) that generates electric power by using heat has been suggested.

KR 1793595 B1

The present invention provides an illuminator that includes a thermoelectric module capable of self-power generation, and can improve the power production efficiency of the thermoelectric module.

According to an aspect of the present invention, there is provided a thermoelectric module including: a thermoelectric module that is positioned on a ground surface and produces electric power based on a temperature difference between both surfaces of a heat source and a cold source; a transparent material cover that covers the heat source module; A heat storage module in contact with the heat source portion and containing a heating water therein; and a cooling water supply portion which is in contact with the cooling source portion, and in which cooling water is supplied to the inside of the cooling water supply portion, And a reflector for concentrating the sunlight to the heat-receiving module, the thermoelectric module including a water-cooling module accommodating the thermoelectric module, and a reflector tilted concavely about the thermoelectric module, Cooling module cooled by the geothermal heat and the temperature difference generated by the water-cooling module cooled by the geothermal heat It provides a fixture using a thermoelectric module of the ranging.

According to an embodiment, each of the opposite ends of the water cooling module further includes a cooling furnace that is connected to each of both sides of the water cooling module to allow the cooling water to flow in and out so that at least a portion thereof is buried in the ground to cool the cooling water therein can do.

According to an embodiment of the present invention, the cleaning tube further includes a cleaning tube having a path passing over the cover, the cleaning tube having a plurality of micropores formed on the outer surface thereof, wherein raw water flows out to the outside through the micropores of the cleaning tube, You can wash it.

According to one embodiment, the reflection plate may include a thermal insulation member for blocking the heat on the ground surface from being transmitted to the underground.

According to an embodiment of the present invention, the surface of the heat source portion of the thermoelectric module has a first protrusion formed in a predetermined pattern, and a surface of the heat-receiving module facing the heat source portion is formed in a pattern corresponding to the pattern of the heat source portion The second protrusion may be formed.

The illuminator according to the present invention indirectly supplies heat stored in the thermoelectric module to the thermoelectric module through a thermoelectric module disposed in contact with the thermoelectric module in a cover that covers the thermoelectric module, The loss rate of heat transmitted to the thermoelectric module can be reduced.

The water cooling module arranged to be in contact with the cooling source of the thermoelectric module maximizes the temperature difference between the heat source and the cooling source of the thermoelectric module without using a separate cooling device by accommodating the cooling water cooled by the geothermal heat, Can be improved.

Also, since a path is formed so as to pass the cleaning tube branched from the cooling passage forming the circulation flow path of the cooling water around the water-cooling module over the cover, by the cooling water flowing out to the outside through the micropores formed in the cleaning tube, The accumulated dust (or fine dust) is cleaned, and the solar heat can be prevented from being blocked by the dust into the cover.

Further, the heat insulating member is provided on the ground except the periphery of the thermoelectric module to prevent the heat on the ground from being transmitted to the underground, thereby improving the cooling efficiency of the cooling water by the geothermal heat.

1A is a view illustrating a self-generated portion of a fixture using a thermoelectric module according to an embodiment of the present invention.
FIG. 1B is a view showing an entire structure of a fixture using a thermoelectric module according to an embodiment of the present invention.
2A and 2B are views illustrating a self-generated portion of a fixture using a thermoelectric module according to another embodiment of the present invention.
3A is a top view of a cover according to one embodiment of the present invention.
3B is a top view of a cover according to another embodiment of the present invention.
4A is a view illustrating a cooling furnace according to an embodiment of the present invention.
4B is a view illustrating a cooling furnace according to another embodiment of the present invention.
5 is a view showing a contact portion between the heat transfer module and the upper and lower hydrothermal and water cooling modules according to an embodiment of the present invention.
Fig. 6 is a view for explaining the whitening effect.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprises" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1A is a view showing a self-generated portion of a fixture using a thermoelectric module according to an embodiment of the present invention, and FIG. 1B is a view showing an entire structure of a fixture using a thermoelectric module according to an embodiment of the present invention.

1A and 1B, a illuminator using a thermoelectric module according to an embodiment of the present invention includes a self-power generating unit 100 positioned on a ground surface and a power generating unit 100 using the power generated by the self- And illuminator 210 to provide illumination.

The illuminator using the thermoelectric module according to an embodiment of the present invention includes a thermoelectric module 110 which is positioned on the ground and generates electric power by a temperature difference between both surfaces of the heat source and the cold source, A cover (150), a storage battery (161) for storing electricity generated by the thermoelectric module, an illuminator (210) for providing illumination using the power supplied by the storage battery, And a water cooling module 130 which is in contact with the cooling part and contains cooling water therein. The power generation module 120 is capable of self-power generation using a thermoelectric module, ) Can be driven.

However, it is needless to say that the components shown in FIGS. 1A and 1B are not essential, so that a fixture using a thermoelectric module having more or fewer components than those shown in FIGS. 1A and 1B can be implemented.

Hereinafter, each component will be described.

The thermoelectric module 110 is a means for producing electric power by using a temperature difference between the heat source part as one surface and the both surfaces of the cold source part as the other surface, and it is possible to convert the energy that the heat is about to move into electric energy.

That is, the thermoelectric module 110 can convert thermal energy into electric energy using the whitening effect. The thermal effect (or thermal electromotive force) is a phenomenon in which the p-type device and the n-type device are arranged side by side to form a metal junction (see FIG. 6) The electrons in the n-type device receive thermal energy, and the holes in the p-type device move to the low temperature because the total energy is increased, and the cold source in which electrons are introduced into the n- +, And the cold source to which the electrons are charged in the p-type device is charged to +, and the heat source is charged in the negative direction to thereby form the space charge in the lower portion of the p-type device, Space charge is formed and current flows.

Accordingly, the thermoelectric module 110 can be implemented by connecting several n-type semiconductors and p-type semiconductors in series, and the heat source unit is arranged to directly or indirectly face the heat-receiving module 120, Cooling module 130 to be described later, and a conductor may be connected to the lower portion of the p-type element and the lower portion of the n-type element such that external electric elements or devices can flow current.

At this time, the lower bonding metal substrate of the thermoelectric module 110 may be a metal plate such as copper or aluminum and a thin copper plate integrated with a high thermal conductive insulator. The high thermal conductive insulator may have a thickness of at least 80 μm and a thickness of 1.8 to 12 W / mK It is possible to have a heat radiation effect equivalent to that of a general ceramic substrate.

The upper bonding metal substrate of the thermoelectric module 110 may be a metal plate such as copper or aluminum for emitting heat transmitted by the p-type semiconductor and the n-type semiconductor.

Meanwhile, the thermoelectric module 110 according to one embodiment of the present invention is installed on the ground, and it can be covered by the cover 150.

The cover 150 covers and protects the upper side of the thermoelectric module 110. The cover 150 may be made of a transparent or semitransparent member such as plastic or glass so as to be exposed to the sunlight. have. Accordingly, the sunlight incident through the cover 150 can heat the heat source of the thermoelectric module 110. The cover 150 may be formed of a single layer or a double layer to improve the strength or improve the heat insulation efficiency.

The shape of the cover 150 is not particularly limited, but it is preferable that the shape of the cover 150 is substantially a dome shape capable of maximizing the effect of collecting sunlight.

The cover 150 is provided with a plurality of convex lenses (not shown) for condensing sunlight on the inner circumferential surface or the outer circumferential surface of the sunlight to transmit the sunlight to the thermoelectric module 110, preferably the thermoelectric module 110 Heat source module or the heat-generating module 120, as shown in FIG.

In addition, it is preferable that a vacuum state is maintained inside the cover 150 to prevent condensation on the inner surface of the cover 150, which may be caused by a temperature difference between the inside and the outside of the cover 150.

The thermoelectric module 110 is a unit for heating the thermoelectric module 110 by the solar heat collected in the cover 150 and storing the heat and providing the stored heat to the heat source of the thermoelectric module 110, It can be brought into surface contact with the heat source part.

The heat-generating module 120 may store the heating water in the internal space, and the heating water may be heated by solar light or solar heat collected in the cover 150.

In order to efficiently heat the heat source portion of the thermoelectric module 110 by heating water in the receiving space of the heat-receiving module 120, the heat-receiving module 120 is made of a metal plate such as copper or aluminum having a high heat- A receiving space can be formed. In addition, the outer surface of the heat-generating module 120 is preferably black so as to increase the absorption rate of sunlight.

At this time, it is preferable that the water-receiving module 120 maintains a watertight state in a state in which the heating water is filled in the internal accommodation space, and the inside and the inside of the heat-receiving module 120 are kept in a vacuum and a hermetic state. Even if high temperature heat is applied to the heat-receiving module 120 by the solar heat, the internal space of the heat-receiving module 120 holding the heated water is maintained in a vacuum state, It is preferable to prevent swelling.

The thermoelectric module 110 receives heat indirectly through the heat-receiving module 120 heated by the solar heat. Since the solar heat is indirectly transmitted to the heat source of the thermoelectric module 110, the total heat transferred may be reduced, but the sunlight discarded on the ground by the reflection plate 141, which will be described later, The total amount of heat transferred to the heat source of the thermoelectric module 110 may be larger because the area of the surface covered with the cover 150 is larger than the area of the thermoelectric module 110. [

 On the other hand, the water-cooling module 130 is installed in contact with the cooling part of the thermoelectric module 110 to cool the cooling part of the thermoelectric module 110 as opposed to the hydrothermal module 120, (Face contact) with the cold portion of the heat sink 110.

The water-cooling module (130) stores cooling water in an internal accommodation space, and the heat-receiving module (120) has a heat transfer rate so that the cooling water cooled by the geothermal heat can efficiently cool the cold- And may be formed to have the accommodation space with a metal plate such as high copper or aluminum.

The cooling water may be directly cooled by the geothermal heat but may be connected to both sides of the water cooling module 130 to form a cooling passage 131 ) And may be cooled through underground heat exchange.

That is, it is preferable that the water cooling module 130 includes cooling water outlets on both sides thereof, and each of the cooling water outflow inlets is connected to both ends to form a flow path.

At this time, at least a part of the cooling path 131 is buried at a depth equal to or lower than the freezing depth (freezing depth) so that cooling water in the cooling path 130 is stored at a depth equal to or less than the freezing depth, .

In order to efficiently perform the underground heat exchange, the cooling furnace 131, which is buried at a depth equal to or less than the freezing depth, may have a tubular shape, and a plurality of bends may be formed so that the thin tube has a zigzag shape.

A circulation pump (not shown) is connected to the cooling passage 131 so that the cooling water can circulate smoothly in the cooling passage 131. The cooling water can be pressurized by the circulation pump have.

According to the embodiment of the present invention, the water cooling module 130 arranged to be in contact with the cooling source of the thermoelectric module 110 receives the cooling water cooled by the geothermal heat, The power generation efficiency can be improved by maximizing the temperature difference between the heat source portion and the cold source portion.

As described above, the thermoelectric module 110 according to an embodiment of the present invention receives heat indirectly through the heat-receiving module 120 heated by solar heat, It is possible to reduce the loss rate of the heat transmitted to the heat exchanger.

To this end, as shown in FIG. 1A, the reflection plate 141 may be provided on the ground except for the thermoelectric module 110 (inside and outside of the cover 150).

Specifically, the cover 150 includes a reflector 141 that can reflect sunlight on a surface other than the thermoelectric module 110. The reflector 141 has a center portion (in the vicinity of the thermoelectric module 110) The sunlight irradiated to the ground can be reflected by the heat-receiving module 120 located on the top surface of the thermoelectric module 110 to concentrate sunlight.

The solar light irradiated toward the ground around the conventional thermoelectric module 110 is not concentrated in the thermoelectric module 110 but is discarded and the heat generation efficiency by the sunlight is low. However, according to the embodiment of the present invention, The heat generation efficiency of the heat source module of the thermoelectric module 110 due to the sunlight can be increased.

On the other hand, it is preferable that the reflection plate 141 is provided with a heat insulating member on the back surface, that is, the surface opposite to the sunlight reflecting surface.

The reflective plate 141 can be heated by sunlight as long as total reflection of sunlight is not performed on the upper surface of the reflective plate 141. The reflective plate 141 is heated by the solar heat collected in the cover 150 .

The temperature of the ground and / or the underground can be raised by the heated reflector 141, and the temperature rise of the ground and / or the underground has a problem that the cooling efficiency of the cooling water and the power generation efficiency of the thermoelectric module may be deteriorated.

Therefore, by using the heat insulating member 142 provided on the back surface of the reflection plate 141, the heat on the ground surface is prevented from being transmitted to the underground, so that the above problem can be solved.

The heat insulating member according to an embodiment of the present invention is not particularly limited as long as it can block heat transmission so that the upper heat is not transmitted to the lower portion.

The electric power produced by the above-described thermoelectric module is supplied to the illuminator 210 and can drive the illuminator 210 to provide illumination.

However, according to an exemplary embodiment of the present invention, the power generated by the thermoelectric module 110 is stored in an energy storage system (ESS) 161 and is supplied to the illuminator 210 through a battery 161 It is desirable to stably supply electric power.

At this time, as shown in FIG. 1B, one battery or a plurality of the self-generating units 110a to 100e may correspond to one battery 161. FIG.

In addition, the illuminator according to an embodiment of the present invention may be installed in an underground space or an indoor space. In addition to the first illuminator 210 that is powered by the battery 161 to provide illumination, And a second illuminator 220 powered by a commercial power source 162 to provide illumination.

At this time, the control unit (not shown) sets the priority of the first illuminator 210 of the first and second illuminators 210 and 220 to a higher level to drive the first illuminator 210, It is preferable that the second illuminator 220 is driven by using the commercial power source 162 when the amount of power stored in the battery 161 is equal to or lower than a preset lower limit power amount.

That is, it is preferable to minimize the power consumption of the commercial power source 162 by first driving the first illuminator 210 by the amount of power stored in the battery 161.

FIG. 2A is a view illustrating a self-generated portion of a fixture using a thermoelectric module according to another embodiment of the present invention.

As shown in FIG. 2A, according to another embodiment of the present invention, the self-generating portion 100 may be mounted on the self-generating-portion supporting box 180 at least partially embedded in the ground.

The support case 180 is embedded in the ground of about 300 mm and protruded to the ground by about 150 mm. The self-generating part 100 may be mounted on the support case 180, May be made of concrete, and it is preferable that an air layer is formed inside the support case 180 by the self-generating part 100 placed on the support.

The heat transfer effect can be improved by delaying the heat transfer time between the upper part and the lower part defined by the air layer and the worker's accessibility to the water cooling module 130 and the cooling path 131 can be improved, It is possible to facilitate the maintenance of the vehicle.

Preferably, the thermoelectric module 110 and the water-cooling module 130 are detachably mounted so that the cover 150 damaged by ultraviolet rays of the sunlight can be replaced, thereby maintaining and maintaining the power generation efficiency of the thermoelectric module 110 And the thermal grease operation and the cleaning operation for increasing the thermal conductivity between the thermoelectric module 110 and the water cooling module 130 can be performed.

As described above, in order to allow the cover 150 to be detached while keeping the inside of the cover 150 in a vacuum state, the separating portion is provided between the hydrothermal module 120 and the thermoelectric module 110 The thermoelectric module 110 may be disposed between the thermoelectric module 110 and the water cooling module 130 in consideration of the thickness of the thermoelectric module 142 and the like. Do.

According to another embodiment of the present invention, as shown in FIG. 2B, the condensing mirror 151 may further include a condensing mirror 151 which is convex upward from the upper side of the hydrothermal module 120.

The condensing mirror 151 may be in the form of a hollow hemispherical shape having a vertical cross section that is convex upward in an approximately hyperbolic or elliptic curve. The condensing mirror 151 is positioned on the optical path of the sunlight reflected by the reflection plate 141 The condensing mirror 151 reflects the sunlight reflected from the reflection plate 141 to the outside and reflects the reflected sunlight to the hydrothermal module 120 so that the solar energy Can be utilized again.

Generally, the self-power generating unit 100 is installed on the ground so that the cover 150 is exposed on the ground, and the cover 150 exposed on the ground has an outer surface due to fine dust, So that the solar light is prevented from entering the inside of the cover 150, and the power generation efficiency of the thermoelectric module 110 can be reduced.

According to one embodiment of the present invention, as shown in FIG. 3A, the cleaning tube 170 may further include a cleaning tube 170 having a path passing over the cover 150, and having a plurality of micropores formed on the outer surface thereof.

The outer surface of the cleaning tube 170 is formed with a number of micropores having a size capable of flowing a fluid having a flow inside the cleaning tube 170. The outer surface of the cleaning tube 170, It is desirable to wash the fine dust or yellow dust accumulated in the water tank.

At this time, it is preferable that the cleaning tube 170 has a path along the outer diameter passing the center vertex of the dome-shaped cover 150.

However, according to an embodiment of the present invention, when the cleaning tube 170 passes over the cover 150, the cleaning tube 170 may be attached to the heat generating module 120 and / or the thermoelectric module 110 According to another embodiment of the present invention, the cleaning tube 170 may be installed so as to be disposed along the outer peripheral surface of the lower end of the cover 150 (see FIG. 3B).

In this case, it is preferable that the micro pores formed on the outer surface of the cleaning tube 170 are formed above and below to spray the fluid toward the surface contacting the cover 150.

4A, the one end 171 of the cleaning tube 170 may be connected to the one-minute point 1311 on the cooling path 131, It is preferable that the position of the branch point 1311 for introducing the cooling water is located at a position adjacent to the water cooling module 130 as shown in FIG.

It is preferable that the temperature of the fluid flowing out of the micropore of the cleaning tube 170 is as high as possible so as not to drop the temperature in the cover 150, Cooling module 131 is close to the ground, and the temperature is relatively high.

At this time, the other end 172 of the cleaning tube 170 may be blocked. However, in order to recover a part of the cooling water supplied into the cleaning tube 170 to the cooling path 131, It is preferable that the other end of the cooling passage 131 is connected to another branch point 1312 of the cooling passage 131. A branch point 1312 between the cleaning tube 170 and the cooling passage 131 may include a check valve to allow the cooling water in the cooling passage 131 to flow into the cleaning tube 170, It is preferable to control the flow so as not to flow back into the cleaning tube 170.

An opening / closing valve (not shown) may be included at an end of the cleaning tube 170 on the side of the cooling path 131 in order to control the flow of cooling water in the cooling path 131 into the cleaning tube 170.

The on / off valve may be operated by a control unit (not shown) for controlling the flushing of the outer surface of the cover 150, and may be opened by a preset time or a predetermined period or an arbitrary control signal. At this time, cooling water flows into the cleaning tube 170 having a low water pressure in the cooling path 131 having a relatively high water pressure, so that the outer surface of the cover 150 can be washed with cooling water.

In order to prevent the cooling water in the cooling passage 131 from flowing out to the outside through the fine holes of the cleaning tube 170 and to reduce the amount of the cooling water in the cooling passage 131, The cooling passage 131 may have a raw water supply point 1313 connected to raw water 132 for supplying cooling water.

In this case, when the cooling water pressure in the cooling path 131 is lowered to a predetermined pressure or less, the raw water supply point 1313 may be connected to the check valve 131 so that the raw water 132 having relatively high water pressure can be introduced into the cooling path 131 . For this purpose, a pump (not shown) may be further provided between the raw water supply point 1313 and the raw water 132 to pressurize the raw water toward the cooling path 131 with a predetermined pressure.

4B, according to another embodiment of the present invention, one end or both ends of the cleaning tube 170 may be directly connected to the raw water 132 without being connected to the cooling path 131, Can be connected.

In this case, an open / close valve 173 is provided on the pipe connected to the cleaning tube 170 from the raw water 132 to control the raw water 132 discharged through the micro pores formed in the cleaning tube 170 .

The open / close valve is operated by a control unit (not shown) for controlling the washing of the outer surface of the cover 150 and is opened by a predetermined time or a predetermined period or an arbitrary control signal, The cleaning water is introduced into the cover 170 and the outer surface of the cover 150 may be washed with the cleaning water.

Further, a pump (not shown) may be further provided between the raw water 132 and the cleaning tube 170 to press the raw water toward the cleaning tube 170 with a predetermined pressure.

FIG. 5 is a view showing a contact portion between the heat transfer module and upper and lower hydrothermal and water cooling modules according to an embodiment of the present invention.

5, the surface of the heat source unit of the thermoelectric module 110 is provided with a first protrusion 1101 having a predetermined pattern, and the surface of the heat receiver module 120, which faces the heat source unit, And a second protrusion 1201 having a corresponding pattern so as to be engaged with the pattern of the heat source unit.

The cooling surface 1101 of the thermoelectric module 110 also has a third protrusion formed in a predetermined pattern so that the surface 1301 of the water cooling module 130, And a fourth protrusion 1102 made of a corresponding pattern so as to be engaged with the pattern of the surface of the circular portion.

In order to increase the efficiency of transferring heat to the thermoelectric module 110 through the thermoelectric module 120 or to increase the efficiency of transferring the cool air to the thermoelectric module 110 through the water cooling module 130, It is preferable that a contact surface facing the thermoelectric module 110 is widened so that a predetermined pattern is formed by at least one protrusion on the surfaces facing each other so as to be centered on each contact surface.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

100: Self-Powered Parts 100a to 100e:
110: thermoelectric module 120:
130: Water cooling module 131: Cooling furnace
1311, 1312: 1st minute branch 1313: 2nd minute branch
132: Raw water 141: Reflector
142: Heat insulating member 150: Cover
151: condenser mirror 161: storage battery
162: commercial battery 170: cleaning tube
171, 172: cleaning tube end portion 173: opening / closing valve
210, 220: illuminator

Claims (5)

A thermoelectric module positioned on the ground to produce electric power by a temperature difference between both surfaces of the heat source and the cold source;
A transparent cover covering the thermoelectric module;
A battery for storing electricity generated by the thermoelectric module;
An illuminator for providing illumination using power supplied by the battery;
A hydrothermal module in contact with the heat source portion, wherein the heat receiving module receives heating water therein and maintains vacuum and airtightness;
A water cooling module in contact with the cold portion and containing cooling water therein;
A reflecting plate for tilting concavely with respect to the thermoelectric module to condense sunlight to the heat-generating module;
A condensing mirror which is convex upwardly disposed above the heat-receiving module in the cover, the condensing mirror being located on an optical path of the sunlight reflected by the reflection plate and converging sunlight reflected by the reflection plate again, - reflection; And
A heat insulating member on the back surface of the reflection plate for blocking transmission of the heat in the cover to the underground;
Lt; / RTI >
Wherein the thermoelectric module produces electric power at a temperature difference generated by the hydrothermal module indirectly heated by the sunlight or indirectly heated by the solar heat generated by the cover and the water cooled module cooled by the geothermal heat, Illuminator using module. The method according to claim 1,
Cooling modules connected to the opposite sides of the water-cooling module such that the cooling water flows in and out of the water cooling module, respectively, so that at least a part thereof is buried in the ground to cool the cooling water therein;
Further comprising a thermoelectric module. 3. The method of claim 2,
A cleaning tube forming a path passing over the cover, the cleaning tube having a plurality of micropores on an outer surface thereof;
Further comprising:
And water is discharged to the outside through the micropores of the cleaning tube to wash the outer surface of the cover. delete The method according to claim 1,
Wherein a surface of the heat source part of the thermoelectric module has a first protrusion formed in a predetermined pattern,
Wherein a surface of the heat-generating module facing the heat source unit has a second protrusion formed in a corresponding pattern so as to be engaged with the pattern of the heat source unit.

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