Photovoltaic self-cooling device

Abstract

The utility model provides a photovoltaic self-cooling device, and the device comprises a heat dissipation mechanism which is arranged to be capable of accelerating the heat dissipation of a photovoltaic panel; the thermoelectric conversion mechanism is electrically connected with the heat dissipation mechanism and can convert heat energy of solar heat radiation into electric energy to be supplied to the heat dissipation mechanism, and the thermoelectric conversion mechanism has different power generation efficiencies along with the magnitude of the solar heat radiation so as to control starting and stopping of the heat dissipation mechanism. According to the technical scheme, the photovoltaic self-cooling device provided by the utility model is provided with the thermoelectric conversion mechanism, heat energy of solar heat radiation is converted into electric energy to be supplied to the heat dissipation mechanism, and the intensity of the solar heat radiation is in direct proportion to the temperature of the photovoltaic panel and the power generation efficiency of the thermoelectric conversion mechanism; therefore, opening and closing of the heat dissipation mechanism are controlled through the power generation efficiency of the thermoelectric conversion mechanism, a detector does not need to be additionally arranged, extra power does not need to be provided for the heat dissipation mechanism, the structure is simple, and cost is low.

Description

Technical Field

[0001] This disclosure relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic self-cooling device. Background Technology

[0002] While photovoltaic panels generate electricity by receiving sunlight, they also receive solar heat radiation. When solar heat radiation is high, the temperature of the photovoltaic panels rises, which leads to a decrease in the power generation efficiency of the photovoltaic panels. Therefore, it is necessary to cool down the photovoltaic panels when solar heat radiation is high.

[0003] Chinese utility model patent CN209057173U discloses a ventilated and heat-dissipating energy storage solar photovoltaic panel. It is equipped with an anemometer and a temperature sensor. When the temperature exceeds a predetermined value and the wind speed does not reach the predetermined value, the controller activates a cooling fan to dissipate heat from the panel. This design requires a sensor to detect the temperature and control the cooling fan accordingly. It also requires additional power to supply the sensor and the cooling fan, resulting in a complex structure and high cost. Utility Model Content

[0004] One of the technical problems that this disclosure aims to solve is that it requires setting up a sensor to detect the temperature and control the opening and closing of the cooling fan based on the temperature. It also requires additional power to supply the sensor and the cooling fan, resulting in a complex structure and high cost.

[0005] To address the aforementioned technical problems, this disclosure provides a photovoltaic self-cooling device comprising:

[0006] A heat dissipation mechanism, configured to accelerate heat dissipation from the photovoltaic panel; and,

[0007] The thermoelectric conversion mechanism is electrically connected to the heat dissipation mechanism and can convert the thermal energy of solar thermal radiation into electrical energy to supply the heat dissipation mechanism. The thermoelectric conversion mechanism has different power generation efficiencies depending on the level of solar thermal radiation to control the opening and closing of the heat dissipation mechanism.

[0008] In some embodiments, the heat dissipation mechanism includes a cooling fan disposed on one side of the photovoltaic panel and electrically connected to the thermoelectric conversion mechanism. The cooling fan is turned on and off according to the power generation efficiency of the thermoelectric conversion mechanism, and has different wind speeds when turned on depending on the power generation efficiency of the thermoelectric conversion mechanism.

[0009] In some embodiments, the heat dissipation mechanism further includes a liquid cooling pipe attached to the back of the photovoltaic panel, and the cooling fan, when turned on, can reduce the temperature of the refrigerant inside the liquid cooling pipe to accelerate the heat dissipation of the photovoltaic panel.

[0010] In some embodiments, the heat dissipation mechanism further includes a plurality of heat sinks, the liquid cooling pipe extends toward the direction of the cooling fan and extends out of the shape of the photovoltaic panel to become an extension end, the extension end is connected to the heat sink, and the airflow generated by the cooling fan flows through the heat sink to remove the heat of the liquid cooling pipe at the extension end.

[0011] In some embodiments, multiple heat sinks are arranged side by side at intervals at the air outlet of the cooling fan, and the ends of the multiple heat sinks away from the cooling fan are connected to each other and partially covered outside the extension end.

[0012] Through the above technical solution, the photovoltaic self-cooling device provided in this disclosure converts the heat energy of solar thermal radiation into electrical energy and supplies it to the heat dissipation mechanism by setting a thermoelectric conversion mechanism. The intensity of solar thermal radiation is proportional to the temperature of the photovoltaic panel and the power generation efficiency of the thermoelectric conversion mechanism. Therefore, the opening and closing of the heat dissipation mechanism can be controlled by the power generation efficiency of the thermoelectric conversion mechanism. There is no need to set up a separate detector or provide additional power to the heat dissipation mechanism. The structure is simple and the cost is low. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the front structure of the photovoltaic panel disclosed in this embodiment;

[0015] Figure 2 This is a schematic diagram of the structure of the back of the photovoltaic panel disclosed in this embodiment;

[0016] Figure 3 This is a schematic diagram of the structure of the side of a photovoltaic panel disclosed in an embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Cooling fan; 2. Liquid cooling pipe; 21. Extension end; 3. Fresnel lens; 4. Thermoelectric conversion mechanism; 5. Photovoltaic panel; 6. Heat sink. Detailed Implementation

[0019] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0021] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0023] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0024] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0026] To address the problems of existing photovoltaic heat dissipation devices requiring temperature sensors to control the cooling fan's on / off state, and necessitating additional power supply to the sensors and fans, resulting in complex structures and high costs, this disclosure provides a photovoltaic self-cooling device, such as... Figure 3 As shown, the photovoltaic self-cooling device includes: a heat dissipation mechanism configured to accelerate heat dissipation from the photovoltaic panel 5; and a thermoelectric conversion mechanism 4 electrically connected to the heat dissipation mechanism, capable of converting solar thermal radiation into electrical energy to supply the heat dissipation mechanism. The thermoelectric conversion mechanism 4 has different power generation efficiencies depending on the level of solar thermal radiation to control the opening and closing of the heat dissipation mechanism. The intensity of solar thermal radiation is directly proportional to the temperature of the photovoltaic panel and the power generation efficiency of the thermoelectric conversion mechanism 4. The higher the solar thermal radiation, the higher the temperature of the photovoltaic panel, and the higher the power generation efficiency of the thermoelectric conversion mechanism 4. When solar thermal radiation increases, the electrical energy supplied by the thermoelectric conversion mechanism 4 to the heat dissipation mechanism reaches the critical point for the heat dissipation mechanism to open, and the heat dissipation mechanism begins to cool the photovoltaic panel 5. Furthermore, the higher the power generation efficiency of the thermoelectric conversion mechanism 4, the more electrical energy is supplied to the heat dissipation mechanism, the greater the power of the heat dissipation mechanism, and the greater the cooling effect on the photovoltaic panel 5. When solar thermal radiation decreases, the temperature of the photovoltaic panel 5 also decreases, the power generation efficiency of the thermoelectric conversion mechanism 4 is low, insufficient to support the operation of the heat dissipation mechanism, the heat dissipation mechanism closes, and no longer cools the photovoltaic panel 5. The above technical solution uses the power generation efficiency of the thermoelectric conversion mechanism 4 to control the opening and closing of the heat dissipation mechanism. There is no need to set up a separate detector to detect the temperature of the photovoltaic panel and then open the heat dissipation mechanism according to the temperature of the photovoltaic panel. Furthermore, the thermoelectric conversion mechanism 4 also provides energy supply for the heat dissipation mechanism, eliminating the need to provide additional power to the heat dissipation mechanism. The structure is simple and the cost is low.

[0027] In some embodiments, such as Figure 1 As shown, the thermoelectric conversion mechanism 4 also includes a Fresnel lens 3, which can concentrate solar thermal radiation and increase the power generation efficiency of the thermoelectric conversion mechanism 4.

[0028] In some embodiments, such as Figure 1 As shown, the heat dissipation mechanism includes a cooling fan 1, which is located on one side of the photovoltaic panel 5 and electrically connected to the thermoelectric conversion mechanism 4. The cooling fan 1 is turned on and off according to the power generation efficiency of the thermoelectric conversion mechanism 4, and the airflow force varies depending on the power generation efficiency of the thermoelectric conversion mechanism 4 when it is on. The cooling fan 1 is turned on under the control of the thermoelectric conversion mechanism 4, aiming at the surface of the photovoltaic panel 5 to accelerate the airflow speed, carrying away the heat from the surface of the photovoltaic panel 5 and thus cooling the photovoltaic panel 5. Alternatively, a liquid-cooled radiator can be used, with the water pump of the liquid-cooled radiator electrically connected to the thermoelectric conversion mechanism 4. The thermoelectric conversion mechanism 4 controls the start and stop of the water pump, and when the water pump is on, it circulates the coolant for heat dissipation.

[0029] In some embodiments, such as Figure 2 and Figure 3 As shown, the heat dissipation mechanism also includes a liquid cooling pipe 2, which is attached to the back of the photovoltaic panel 5, so that the placement of the liquid cooling pipe 2 does not affect the power generation of the photovoltaic panel 5. When the cooling fan 1 is turned on, it cools the surface of the liquid cooling pipe 2, thereby reducing the temperature of the refrigerant inside the liquid cooling pipe 2 and accelerating the heat dissipation of the photovoltaic panel 5. As mentioned above, while promoting the heat dissipation of the photovoltaic panel 5, the liquid cooling pipe 2 can also be configured to be attached to the thermoelectric conversion mechanism 4, thereby increasing the temperature difference and increasing its power generation efficiency.

[0030] In some embodiments, such as Figure 2 and Figure 3 As shown, the heat dissipation mechanism also includes multiple heat sinks 6. The liquid cooling pipe 2 extends towards the cooling fan 1 and protrudes beyond the shape of the photovoltaic panel 5 to form an extension end 21. The extension end 21 is connected to the heat sink 6. The airflow generated by the cooling fan 1 flows through the heat sink 6 to remove the heat from the liquid cooling pipe 2 at the extension end 21. A temperature difference is generated between the extension end 21 and the main body of the liquid cooling pipe 2 located on the back of the photovoltaic panel 5. When the main body of the liquid cooling pipe 2 cools down, it cools down the photovoltaic panel 5, thus completing the heat dissipation of the photovoltaic panel 5.

[0031] In some embodiments, such as Figure 3 As shown, multiple heat sinks 6 are arranged side-by-side at intervals at the air outlet of the cooling fan 1. The ends of the multiple heat sinks 6 away from the cooling fan 1 are connected to each other and partially fitted over the extension end 21. The air blown out by the cooling fan 1 cools the surface of the heat sinks 6, thereby cooling the extension end 21 partially fitted inside the heat sinks 6, and further cooling the photovoltaic panel 5.

[0032] Figure 3 This is a schematic diagram of the heat dissipation mechanism and the photovoltaic panel 5. The connection between the main body of the liquid cooling pipe 2 on the back of the photovoltaic panel 5 and the extension end 21 fitted in the heat sink 6 is not shown. When the main body of the liquid cooling pipe 2 extends towards the cooling fan 1, it can use any route, as long as it can connect with the extension end 21 fitted in the heat sink 6. An opening can be made in the heat sink 6, and any existing technology can be used for connection, such as a flange connection, to connect the main body of the liquid cooling pipe 2 to the extension end 21 fitted in the heat sink 6.

[0033] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0034] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A photovoltaic self-cooling device, characterized in that, include: A heat dissipation mechanism, configured to accelerate the heat dissipation of the photovoltaic panel (5); and, Thermoelectric conversion mechanism (4) is electrically connected to the heat dissipation mechanism and can convert the heat energy of solar thermal radiation into electrical energy to supply the heat dissipation mechanism. The thermoelectric conversion mechanism (4) has different power generation efficiencies depending on the level of solar thermal radiation in order to control the opening and closing of the heat dissipation mechanism.

2. The photovoltaic self-cooling device according to claim 1, characterized in that, The heat dissipation mechanism includes a heat dissipation fan (1), which is located on one side of the photovoltaic panel (5) and electrically connected to the thermoelectric conversion mechanism (4). The heat dissipation fan (1) is turned on and off according to the power generation efficiency of the thermoelectric conversion mechanism (4), and has different wind force when turned on according to the power generation efficiency of the thermoelectric conversion mechanism (4).

3. The photovoltaic self-cooling device according to claim 2, characterized in that, The heat dissipation mechanism also includes a liquid cooling pipe (2), which is attached to the back of the photovoltaic panel (5). When the cooling fan (1) is turned on, it can reduce the temperature of the refrigerant in the liquid cooling pipe (2) to accelerate the heat dissipation of the photovoltaic panel (5).

4. The photovoltaic self-cooling device according to claim 3, characterized in that, The heat dissipation mechanism also includes multiple heat sinks (6). The liquid cooling pipe (2) extends toward the cooling fan (1) and extends out of the shape of the photovoltaic panel (5) to become an extension end (21). The extension end (21) is connected to the heat sink (6). The airflow generated by the cooling fan (1) flows through the heat sink (6) to remove the heat from the liquid cooling pipe (2) at the extension end (21).

5. The photovoltaic self-cooling device according to claim 4, characterized in that, Multiple heat sinks (6) are arranged side by side at intervals at the air outlet of the cooling fan (1). The ends of the multiple heat sinks (6) away from the cooling fan (1) are connected to each other and partially sleeved on the extension end (21).

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