KR102024043B1 - Non-powered photovoltaic module cooling device and photovoltaic module system having the same - Google Patents

Abstract

The present invention relates to a non-powered cooling device of a photovoltaic module which can effectively cool a photovoltaic module without power by using natural convection or seasonal wind. Particularly, a temperature of an air current due to the natural convection and the seasonal wind can be lowered by using the adiabatic expansion effect or Joule-Thomson effect so as to increase a heat exchange effect with the photovoltaic module. Moreover, an excellent cooling effect can be obtained without applying the power by allowing the air current to flow in a state of adhering to a lower surface of the photovoltaic module by using the Coanda effect.

Description

Non-powered cooling device of solar cell module and solar cell module system having same {NON-POWERED PHOTOVOLTAIC MODULE COOLING DEVICE AND PHOTOVOLTAIC MODULE SYSTEM HAVING THE SAME}

The present invention relates to a solar cell module cooling apparatus and a solar cell module system having the same, and more particularly, to a non-powered cooling apparatus of a solar cell module for cooling the solar cell module using natural convection and seasonal winds and the same. One solar cell module system relates.

Photovoltaic modules that generate power using sunlight are installed on roofs, walls, or hills of high-insolation buildings. The solar cell module is installed to face the sun to produce power with high efficiency. Therefore, during solar power generation, the solar cell module is gradually heated to increase the temperature.

As the temperature of the solar cell module increases, the power generation efficiency of the solar cell module decreases gradually. In general, when the temperature of the solar cell module rises by 1 ° C, the power generation efficiency decreases by about 0.5%.

For example, when the temperature of the solar cell module rises to 60 ° C, the temperature of the solar cell module rises 35 ° C further based on 25 ° C. In this situation, power generation efficiency is reduced by up to 17.5%, and the lifespan of the solar cell module is also reduced.

To solve this problem, the solar cell module is installed with a cooling device for cooling it.

Conventional cooling apparatus uses the cooling water to discharge the heat generated from the solar cell module to the outside, or by forcibly circulating the outside air to export the air warmed by the solar cell module to the outside using a method such as Cooled.

Japanese Unexamined Patent Application Publication No. 2004-259797 "Cooling method and solar cell module system of a photovoltaic module" discloses a method of cooling a solar cell module by spraying water on the surface of the solar cell module and vaporizing water.

In order to cool the solar cell module in this way, a complicated facility for spraying and evaporating water is required, and there is inconvenience in using it, such as continuously replenishing evaporated water.

In addition, since water must be injected directly into the solar cell module, the solar cell module must be a waterproof module that is not corroded or submerged. Therefore, installation cost is more expensive and difficult to manage than general solar cell module.

Republic of Korea Patent Publication No. 10-2013-0077305 "Cooling device of the solar module" is a solar cell module by circulating the warmed air to the outside by supplying the outside air using a blower fan to the ventilation layer installed on the rear of the solar cell module A cooling method is proposed to allow the cooling of.

Since the above method is forcibly circulating the outside air by using a blower fan, the cooling effect is superior to the method using natural convection, but the cooling effect is somewhat lower than that using the cooling water. In addition, there is a problem in that the size of the solar cell module system increases because a blower fan for circulating external air must be provided.

On the other hand, in addition to the above-described method, there is also a method of cooling the solar cell module by circulating air using natural convection, but this method is a method of circulating air by forcing energy or discharging heat by using cooling water. The cooling effect is inferior, and the cooling efficiency varies greatly depending on the environment, and thus there is a problem that it is difficult to expect a stable cooling effect.

Japanese Laid-Open Patent Publication No. 2004-259797 "Cooling method of solar power module and solar cell module system" (published Sep. 16, 2004) Republic of Korea Patent Publication No. 10-2013-0077305 "cooling device of the solar module" (published on July 7, 2013)

The present invention has been made to solve the problems of the prior art as described above, it is to propose a non-power cooling device of a solar cell module that can effectively cool the solar cell module using no power using natural convection or seasonal wind.

In particular, the airflow caused by natural convection and monsoon is increased by lowering the temperature using the adiabatic expansion effect or the Joule-Thomson effect to increase the heat exchange efficiency, and the airflow using the Coanda effect. By flowing in close contact with the lower surface, it is intended to obtain an excellent cooling effect without applying power.

In order to solve the above problems, the present invention, in the non-powered cooling device of the solar cell module for cooling the solar cell module disposed obliquely: to be fixed to the lower end of the solar cell module, the lower surface of the solar cell module The cross-sectional structure extending from the front toward the front upper portion of the solar cell module extends in the horizontal direction, and the central coanda portion having a convex shape from the center to the front and rear in the front and rear, and the thickness while extending backward from the central coanda portion The rear coanda portion of the gradually thinner form, and the front coanda portion of the front coanda portion of the form gently bent toward the front upper portion while extending forward from the central coanda portion, the front coanda portion and the center The coanda portion and the rear coanda portion is connected in a continuous curved form coanda curved surface A fixed airflow guide plate having an upper airflow guide forming a portion; A pair of side plates respectively provided at both horizontal ends of the fixed airflow guide plate; Both ends of the fixed airflow guide plate is rotatably supported by the side plate while forming an air flow passage between the fixed airflow guide plate, and the air flow inlet lower guide plate and the air flow inlet lower guide plate from the front A rotational airflow guide plate including a lower airflow guide plate extending rearward and having a front and rear length of the airflow inlet lower guide plate longer than the front and rear length of the airflow airflow lower guide plate; An elastic member having one end coupled to the rotational airflow guide plate and the other end coupled to the side plate to apply an elastic force to the rotational airflow guide plate such that the rotational airflow guide plate is rotated in a direction in which the airflow passage is opened; Restriction of rotation including an upper stopper provided on the side plate to limit upward rotation of the lower guide plate for airflow discharge, and a lower stopper provided on the side plate to limit downward rotation of the lower guide plate for airflow discharge. Stopper; Characterized in that comprises a.

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In the above, it is preferable that the fixed airflow guide plate comprises a fixing bracket forming an L-shaped cross-sectional structure together with the rear coanda part to be fixed to the lower end of the solar cell module.

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In the above, the rotatable air flow guide plate is in the form of a flat plate, both sides of the rotatable air flow guide plate may be provided with a shaft projection rotatably coupled to the side plate.

In another aspect of the present invention, there is provided a solar cell module system comprising a solar cell module and a non-powered cooling device of the solar cell module mounted on a lower end of the solar cell module.

As described above, the non-powered cooling device of the solar cell module according to the present invention can effectively cool the solar cell module without inputting power using natural convection or seasonal wind.

In particular, by lowering the temperature of the air flow due to natural convection and monsoon by using the adiabatic expansion effect or the Joule-Thomson effect, the heat exchange effect with the solar cell module is increased, and the Coanda effect is used. By flowing the airflow in close contact with the bottom surface of the solar cell module, it is possible to obtain an excellent cooling effect without applying power.

In addition, it is possible to expect an optimized cooling effect according to the state of the air flow as the inclination of the rotational air flow guide plate changes according to the strength of the air flow.

1 is a perspective view of a non-powered cooling device of a solar cell module and a solar cell module mounted thereto according to an embodiment of the present invention,
Figure 2 is an exploded perspective view of the non-powered cooling device of the solar cell module of Figure 1,
3 is a cross-sectional view conceptually illustrating a state in which the non-powered cooling device of the solar cell module of FIG. 1 is installed;
4 is a view showing a state of use by natural convection of the non-powered cooling device of the solar cell module of FIG.
5 is a view showing a state of use by the monsoon of the non-powered cooling device of the solar cell module of FIG.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification. When any part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated.

1 is a perspective view of a non-powered cooling device of the solar cell module and a solar cell module mounted thereto according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the non-powered cooling device of the solar cell module of Figure 1, Figure 3 1 is a cross-sectional view conceptually illustrating a state in which the non-powered cooling device of the solar cell module of FIG. 1 is installed, and FIG. 4 is a view illustrating a state of use by natural convection of the non-powered cooling device of the solar cell module of FIG. 3 is a view showing a state of use by the monsoon of the non-powered cooling device of the solar cell module of FIG.

The solar cell module system according to an embodiment of the present invention is to enable effective cooling of the solar cell module using natural convection or seasonal wind. The non-powered cooling device of the solar cell module of the present embodiment is fixedly installed at the lower end of the solar cell module 10 installed inclined on a flat or hilly.

The non-powered cooling device of the solar cell module of the present embodiment controls the flow of airflow by using the Coanda effect, and natural convection or monsoon by using adiabatic expansion or Joule-Thomson effect. The air flow by the can be used as an effective cooling means.

The non-powered cooling device of the solar cell module includes a fixed airflow guide plate 100, a rotational airflow guide plate 200, a pair of side plates 300, a rotation limiting stopper 310, and an elastic member 400. .

The fixed airflow guide plate 100 is fixed to the solar cell module 10 and serves to guide the airflow.

On the other hand, the rotational airflow guide plate 200 serves to guide the airflow while the posture is rotated according to the airflow.

The fixed airflow guide plate 100 includes a fixing bracket 110 and an upper airflow guide 120 to be fixed to the lower end of the solar cell module 10.

The upper airflow guide 120 has a shape in which a specific cross-sectional structure extends in the horizontal direction. Hereinafter will be described based on the cross-sectional structure of the upper airflow guide 120.

In the present embodiment, the upper airflow guide 120 forms a coanda curved portion for generating a coanda effect to guide the airflow to the rear surface of the solar cell module 10.

To this end, the upper airflow guide portion 120 of the present embodiment extends backward from the central coanda portion 121 and the central coanda portion 121 having a convex shape from the center in the front-rear direction to the bottom thereof, and gradually become thinner. It comprises a rear coanda portion 122 of the form, and the front coanda portion 123 of the form gently bent toward the front upper portion while extending forward from the central coanda portion 122.

In addition, the front coanda 123, the central coanda 121, the rear coanda 122 is connected in a continuous curved form.

The fixing bracket 110 forms an L-shaped cross-sectional structure with the rear coanda part 122.

According to the exemplary embodiment, the upper airflow guide 120 may have a cross-sectional structure extending from the lower surface of the lower end of the solar cell module 10 toward the front upper portion of the solar cell module 10 without forming a coanda curved portion. have.

The fixing bracket 110 and the rear coanda part 122 of the present embodiment surround the edges of the side and bottom surfaces of the lower end of the solar cell module 10 so as to be firmly fixed to the lower end of the solar cell module 10. It is manufactured in L shape.

That is, the fixing bracket 110 and the rear coanda portion 122 are in the form of an angle bar contacting the side and bottom surfaces of the lower end of the solar cell module 10. The fixing bracket 110 is provided with a plurality of screw fastening holes 111 to screw the fixing bracket 110 to the solar cell module 10.

The form and coupling method of the fixing bracket 110 is to ensure that the fixed airflow guide plate 100 is stably fixed to the solar cell module 10 even if the strength of the airflow is very strong.

The shape of the fixing bracket 110 is just an example, and the shape of the fixing bracket 110 may be changed according to an embodiment. In addition, the coupling method in which the fixing bracket 110 is coupled by a screw (not shown) fastened to the screw fastening hole 111 may be changed according to the embodiment.

In addition, the upper air flow guide portion 123, the central coanda portion 121, the rear coanda portion 122 will be described in detail the upper air flow guide portion 120 connected in a continuous curved form.

The rear coanda portion 122 extends backwards and becomes thinner and smoothly adheres to the bottom surface of the solar cell module 10. Such a form is intended to allow the airflow to flow smoothly to the bottom surface of the solar cell module 10.

The front coanda 123 is formed in a shape that is gently curved toward the front upper portion while extending forward. Such a shape not only enables the airflow to be smoothly guided to the rear of the solar cell module 10 by the Coanda effect, but also serves to guide more airflow.

The central coanda part 121 is naturally convex downwardly due to the shape of the rear coanda part 122 and the front coanda part 123.

The fixed airflow guide plate 100 may be manufactured in various ways. For example, the fixing bracket 110 and the upper airflow guide 120 may be manufactured and assembled, respectively. However, in the present embodiment, the fixing bracket 110 and the upper airflow guide 120 are integrally formed through injection molding.

The airflow moving along the upper airflow guide 120 is bent along the lower surface of the upper airflow guide 120 by the Coanda effect and guided to the rear surface of the solar cell module 10. The airflow guided to the rear surface of the solar cell module 10 by the fixed airflow guide plate 100 is in close contact with the bottom surface of the solar cell module 10 to effectively heat exchange.

The Coanda effect above and below means that the air flows smoothly and bends along the curved surface without going straight along the direction in which the air flow is generated when flowing along the curved surface.

In general, since the solar cell module 10 is installed to be inclined according to the angle at which sunlight is incident, the airflow flowing from the front toward the solar cell module 10 flows in close contact with only the upper surface of the solar cell module 10. That is, heat is not effectively discharged from the bottom surface of the solar cell module 10.

If some of the airflow flowing from the front of the solar cell module 10 flows into the bottom surface of the solar cell module 10, the airflow does not flow in close contact with the bottom surface of the solar cell module 10, so the solar cell The heat emitted from the lower surface of the module 10 may not be effectively discharged to the outside.

That is, in order to effectively discharge heat generated from the bottom surface of the solar cell module 10 and to ensure the cooling effect, airflow must flow along the bottom surface of the solar cell module 10.

Conventionally, the air flow is forced to the bottom surface of the solar cell module 10 by using a blower, but such a method has a problem in that a complicated facility must be added because additional power must be input.

The fixed airflow guide plate 100 of the present embodiment solves such a problem so that the airflow can flow along the lower surface of the solar cell module 10 by the Coanda effect without applying a separate power. Through this, it is possible to effectively discharge the heat generated from the lower surface of the solar cell module 10.

A horizontal side end portion of the fixed airflow guide plate 100 is provided with a pair of side plates 300 rotatably supporting the rotational airflow guide plate 200 in the vertical direction. The pair of side plates 300 are provided to face each other at both ends in the horizontal direction of the fixed airflow guide plate 100.

In this embodiment, the side plate 300 is shown as being fixed to both ends of the fixed airflow guide plate 100, the side plate 300 may be fixed to the side of the solar cell module 10.

The side plate 300 has a pivoting hole 320 for rotatably coupling the rotational airflow guide plate 200 to be described later, and a rotational restriction stopper 310 for limiting the rotation of the rotational airflow guide plate 200. Are each provided.

Axial projection through-hole 320 is a through-hole is inserted into the shaft projection 230 to be described later formed in the rotational air flow guide plate 200, the rotation limit stopper 310 is a vertical rotation of the rotational airflow guide plate 200 The protrusion is formed to protrude inward to limit.

The rotational airflow guide plate 200 adjusts the direction of airflow flowing into the lower portion of the solar cell module 10, and an airflow passage for allowing airflow to pass between the fixed airflow guide plate 100 and the rotational airflow guide plate 200. (A) is formed.

The rotational airflow guide plate 200 is inclined according to the intensity of the airflow to change the size of the airflow passage A formed between the fixed airflow guide plate 100 and the rotational airflow guide plate 200. That is, the size of the air flow passage A is automatically changed so that the adiabatic expansion or Joule-Thomson effect can be easily generated according to the strength of the air flow.

The rotational airflow guide plate 200 has a flat plate shape, and is spaced downward from the fixed airflow guide plate 100 so as to be rotatable in the vertical direction.

The rotational airflow guide plate 200 includes a lower airflow guide plate 210 positioned below the solar cell module 10 and a lower airflow guide plate extending forward from a lower end of the lower airflow guide plate 210. 220) and a rotating shaft forming member for forming a rotating shaft in the horizontal direction between the lower guide plate 210 for discharging airflow and the lower guide plate for inflowing air 220 to be rotatably supported by the pair of side plates 300. It is made to include.

The rotational airflow guide plate 200 is rotated around a rotation axis between the airflow guide lower guide plate 210 and the airflow inlet lower guide plate 220. In the present embodiment, the rotating shaft forming member for forming the rotating shaft is a shaft protrusion 230 which protrudes from both ends of the horizontal direction of the rotating airflow guide plate 200, respectively.

Rotating air flow guide plate 200 is each rotatable projection 230 is inserted into the rotatable projection hole 320 of the side plate 300, respectively, is rotatably coupled, the rotational air flow guide plate 200 is a projection ( It is rotated in the up and down direction while being supported by the pair of side plates 300 on the basis of the rotating shaft 230.

The rotating shaft forming member which forms the rotating shaft in the horizontal direction and allows the rotating airflow guide plate 200 to be rotated in the vertical direction may be variously changed according to the embodiment.

The lower guide plate 220 for airflow inflow of the rotational airflow guide plate 200 is configured such that the airflow introduced between the rotational airflow guide plate 200 and the fixed airflow guide plate 100 is lower than the solar cell module 10 and the airflow guide lower plate. Guide between 210.

The lower guide plate 210 for discharging airflow of the rotating airflow guide plate 200 discharges the airflow introduced between the solar cell module 10 and the lower airflow guide plate 210 to the rear surface of the solar cell module 10. Guide as much as possible.

The lower airflow guide plate 220 for airflow also serves to allow the rotational airflow guide plate 200 to be rotated according to the intensity of the airflow flowing therein. Therefore, the front and rear lengths of the lower air flow guide lower plate 220 for air flow is formed longer than the front and rear lengths of the air flow discharge lower guide plate 210 so that the rotational air flow guide plate 200 can be effectively pressed by the air flow introduced therein.

In the present embodiment, the ratio of the longitudinal length of the lower guide plate 210 for discharging the airflow of the rotating airflow guide plate 200 and the lower guide plate 220 for the airflow inlet is 1: 2. That is, the point at which the ratio of the length of the lower airflow guide plate 210 for discharging airflow and the lower airflow guide plate 220 for airflow is about 1: 2 becomes the rotation axis of the rotational airflow guide plate 200.

The rotational airflow guide plate 200, when the lower airflow guide plate 220 for the airflow inlet is pressed in accordance with the strength of the airflow flowing in, the lower airflow guide plate 210 for discharging the airflow is rotated upwards to discharge the fixed airflow guide plate 100 and the airflow The lower guide plate 210 is closer to each other. That is, the stronger the airflow, the narrower the airflow passage A through which the airflow can pass.

As mentioned above, the side plate 300 is provided with a rotation limiting stopper 310 for limiting the rotation range of the rotational airflow guide plate 200 rotated about the axis of rotation. The rotation restriction stopper 310 includes an upper stopper 311 for limiting upward rotation of the lower guide plate 210 for discharging airflow and a lower stopper 312 for restricting downward rotation of the lower guide plate 210 for discharging airflow. .

The upper stopper 311 and the lower stopper 312 are formed to protrude inward to the inner surface of the side plate 300, respectively.

The lower stopper 312 may be rotated only until the rotational airflow guide plate 200 is in parallel with the solar cell module 10. To this end, the lower stopper 312 is provided at a position where the rotatable airflow guide plate 200 may be in contact with the rear surface of the lower airflow guide plate 210 for discharging airflow when the rotating airflow guide plate 200 is parallel to the solar cell module 10.

The upper stopper 311 is such that the rotation guide plate 200 is rotated so that the size of the air flow passage (A) is not narrowed to less than 20-30% of the maximum size. To this end, the upper stopper 311 is provided at a position where the upper stopper 311 may contact the upper surface of the lower guide plate 210 for discharging airflow when the size of the airflow passage A becomes 20 to 30% of the maximum size.

The elastic member 400 is for applying an elastic force so that the rotational airflow guide plate 200 is rotated in either direction. Elastic member 400 of the present embodiment is a tension spring, one end is coupled to the rotational air flow guide plate 200 and the other end is coupled to the side plate 300 is rotated in the direction in which the air flow passage (A) is opened to the maximum The air flow guide plate 200 is rotated.

In this embodiment, one end of the elastic member 400 is fixed to the air flow discharge lower guide plate 210 of the rotational air flow guide plate 200 and the other end of the elastic member 400 is the air flow discharge lower portion of the side plate 300 It is fixed to a portion located below the guide plate 210.

The elastic member 400 pulls the lower guide plate 210 for discharging airflow downward of the rotating airflow guide plate 200 so that the rotating airflow guide plate 200 is a solar cell while no external force is applied to the rotating airflow guide plate 200. It is possible to maintain a posture parallel to the module (10).

The type of the elastic member 400 for applying the rotational force to the rotational airflow guide plate 200 may be changed according to the embodiment, and the portion where the end of the elastic member 400 is coupled may also vary according to the embodiment.

For example, the elastic member may be a compression spring or a torsion spring. The elastic member may not be coupled to the lower guide plate 210 and the side plate 300 for discharging airflow, but may be coupled to the lower guide plate 220 and the side plate 300 for airflow inlet.

Next will be described the operation of the non-powered cooling device of the solar cell module according to an embodiment of the present invention.

The solar cell module 10 is installed to be inclined in the plain or hills as mentioned above. And the non-powered cooling device of the solar cell module of the present embodiment is installed at the lower end of the solar cell module (10).

The upper surface of the solar cell module 10 is cooled by the airflow flowing from the front toward the solar cell module 10. That is, the upper surface of the solar cell module 10 is naturally cooled by the airflow.

The lower surface of the solar cell module 10 is cooled by the non-powered cooling device of the solar cell module installed in the lower end of the solar cell module 10. More specifically, it is cooled by the airflow flowing into the lower surface of the solar cell module 10 by the non-powered cooling device of the solar cell module.

In order to explain the specific operation method of the non-powered cooling device of the solar cell module, the incoming air flow is divided into two types.

One of the airflows flowing into the non-powered cooling device of the solar cell module is the airflow by natural convection. Natural convection refers to airflow caused by convection that occurs naturally due to the difference in density of air. Airflow by natural convection is slow and not strong.

The other is a monsoon flow. Monsoon means wind blown by the temperature difference between continents and oceans, which is much faster and stronger than the airflow caused by natural convection.

As shown in FIG. 4, the airflow due to natural convection may form a lower surface of the upper airflow guide 120 having a curved shape and an upper surface of the rotational airflow guide plate 200 maintaining a parallel state with the solar cell module 10. Therefore, it flows into the airflow passage A. The airflow flows through the airflow passage A to the bottom surface of the solar cell module 10.

Unlike the airflow caused by the seasonal wind, the airflow due to the natural convection is not slow and strong, so the rotational airflow guide plate 200 does not rotate upward. That is, the rotational airflow guide plate 200 maintains a parallel state with the solar cell module 10.

While the airflow by natural convection is introduced, the rotational airflow guide plate 200 maintains a parallel state with the solar cell module 10 and maintains the maximum size of the airflow passage A. In such a state, the airflow passing through the airflow passage A has a relatively low air pressure at the upper portion of the lower portion of the cooling device, and lowers the adiabatic expansion while lowering the temperature of the airflow, thereby increasing the cooling efficiency. That is, the airflow passing through the airflow passage A causes volume expansion due to low ambient pressure, and thermal energy decreases by the energy used to expand the volume, thereby lowering the temperature.

In addition, since the airflow passage A is opened to the maximum, a large amount of airflow smoothly moves to the bottom surface of the solar cell module 10, thereby increasing the cooling efficiency of the solar cell module 10 due to the airflow.

If the air flow passage A is not opened to the maximum when only natural convection occurs, the air flow may not pass smoothly through the air flow passage A. However, if the strength of the airflow is weak, the inclination of the rotating airflow guide plate 200 is automatically adjusted by the elastic member 400, so that the airflow passage A is opened to the maximum, thereby increasing the amount of airflow circulated and natural convection. Can maximize the cooling effect.

Meanwhile, the airflow flowing in close proximity to the lower surface of the fixed airflow guide plate 100 is moved in close contact with the lower surface of the solar cell module 10 by the Coanda effect. As such, the cooling is more effectively performed by the airflow flowing in close contact with the rear surface of the solar cell module 10.

The non-powered cooling device of the solar cell module according to the present embodiment exhibits a stronger cooling effect when the airflow caused by the monsoon is introduced as shown in FIG. 5.

Since the airflow by the monsoon is faster and stronger than the airflow by the natural convection, the airflow is strongly compressed while passing through the airflow passage A between the fixed airflow guide plate 100 and the rotational airflow guide plate 200, and the airflow passage ( During discharge from A), the Joule-Thomson effect is strongly generated, maximizing the cooling effect.

The airflow flowing into the upper portion of the rotational airflow guide plate 200 rotates the rotational airflow guide plate 200 upward by pressing the lower airflow guide plate 220 of the rotational airflow guide plate 200 downward. When the rotational airflow guide plate 200 is rotated, the lower guide plate 210 for discharging airflow is closer to the fixed airflow guide plate 100, and the airflow passage A is narrowed. When the airflow passage A is narrowed, the airflow carrying the wind pressure (pressure) is further compressed, so that the pressure change of the airflow discharged to the rear surface of the solar cell module 10 becomes larger.

The airflow passes through the airflow passage A and is discharged to the rear surface of the solar cell module 10, where the compressed airflow rapidly expands. As a result, the distance between molecules increases and the kinetic energy of the molecules decreases, causing the internal energy (thermal energy) of the airflow to decrease rapidly. In other words, the airflow is cooled by the Joule-Thomson effect.

Similarly, the airflow flowing in close proximity to the bottom surface of the fixed airflow guide plate 100 is moved in close contact with the bottom surface of the solar cell module 10 by the Coanda effect. As such, the cooling is more effectively performed by the airflow flowing in close contact with the rear surface of the solar cell module 10.

As mentioned above, the rotational airflow guide plate 200 is provided with an elastic member 400, and the rotational airflow guide plate 200 is rotated according to the strength of the airflow so that the inclination is changed or restored to its original position. .

Therefore, when the strength of the air flow exceeds the elastic force of the elastic member 400, such as the monsoon, the rotational airflow guide plate 200 is rotated to narrow the airflow passage A. By the elasticity of the 400, the rotational airflow guide plate 200 is returned to its original position so that the airflow passage A is fully opened again.

That is, when the non-powered cooling device of the solar cell module according to the embodiment of the present invention is used, the slope of the rotating airflow guide plate 200 and the size of the airflow passage A are automatically adjusted according to the strength of the airflow without any troublesome operation. It can be adjusted to, through this it is possible to maximize the cooling effect of the air flow by the adiabatic expansion or Joule-Thomson effect. In addition, the air flow is in close contact with the rear surface of the solar cell module 10 by the fixed airflow guide plate 100 to obtain a sure surface cooling effect.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. .

Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

10: solar cell module
100: fixed airflow guide plate 110: fixing bracket
120: upper airflow guide
200: rotational airflow guide plate 210: airflow guide lower guide plate
220: lower guide plate for air flow inlet 230: shaft projection
300: side plate 310: rotation limit stopper
311: upper stopper 312: lower stopper
320: through hole for the shaft projection
400: elastic member
A: air flow passage

Claims (6)

In a non-powered cooling device of a solar cell module for cooling a solar cell module arranged obliquely:
To be fixed to the lower end of the solar cell module, the cross-sectional structure extending from the lower surface of the lower end of the solar cell module toward the front upper portion of the solar cell module extends in the horizontal direction, the convex shape from the center in the front and rear direction downward. The central coanda portion having a, and the rear coanda portion of the shape gradually thinner while extending backward from the central coanda portion, and gently extending toward the front upper portion while extending forward from the central coanda portion A fixed airflow guide plate comprising a front coanda portion of the form, wherein the front coanda portion, the central coanda portion and the rear coanda portion is connected in a continuous curved form and has an upper airflow guide portion forming a coanda curved portion. ;
A pair of side plates respectively provided at both horizontal ends of the fixed airflow guide plate;
Both ends of the fixed airflow guide plate is rotatably supported by the side plate while forming an air flow passage between the fixed airflow guide plate, and the air flow inlet lower guide plate and the air flow inlet lower guide plate from the front A rotational airflow guide plate including a lower airflow guide plate extending rearward and having a front and rear length of the airflow inlet lower guide plate longer than the front and rear length of the airflow airflow lower guide plate;
An elastic member having one end coupled to the rotational airflow guide plate and the other end coupled to the side plate to apply an elastic force to the rotational airflow guide plate such that the rotational airflow guide plate is rotated in a direction in which the airflow passage is opened;
Restriction of rotation including an upper stopper provided on the side plate to limit upward rotation of the lower guide plate for airflow discharge, and a lower stopper provided on the side plate to limit downward rotation of the lower guide plate for airflow discharge. Stopper;
Non-powered cooling device of a solar cell module, characterized in that comprises a.
delete The method of claim 1,
The fixed airflow guide plate, the non-powered cooling device of the solar cell module, characterized in that it comprises a fixing bracket forming an L-shaped cross-sectional structure with the rear coanda portion to be fixed to the lower end of the solar cell module.
delete The method according to claim 1 or 3,
The rotational airflow guide plate is in a flat plate shape, the non-powered cooling device of the solar cell module, characterized in that the shaft projection is rotatably coupled to the side plate at both ends of the rotational airflow guide plate.
A solar cell module system comprising a solar cell module and a non-powered cooling device of the solar cell module according to claim 1 mounted to a lower end of the solar cell module.

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