WO2024021550A1

WO2024021550A1 - Energy-saving system and method for photovoltaic power generation refrigeration

Info

Publication number: WO2024021550A1
Application number: PCT/CN2023/073830
Authority: WO
Inventors: 黄绍宽; 吴跃波; 吴竞雄; 廖颖涵; 陈娅
Original assignee: 重庆跃达新能源有限公司
Priority date: 2022-07-29
Filing date: 2023-01-30
Publication date: 2024-02-01
Also published as: CN115218533B; CN115218533A

Abstract

An energy-saving system and method for photovoltaic power generation refrigeration, relating to the technical field of photovoltaic power generation refrigeration. The system comprises: a solar receiving panel, a storage battery being connected to the solar receiving panel, and a refrigerating unit being connected to the storage battery; and a thermoelectric power generation sheet, the thermoelectric power generation sheet consisting of a plurality of PN-type semiconductors, the unconnected ends of the PN-type semiconductors being in contact with a working surface of the solar receiving panel, the connected ends of the PN-type semiconductors being in contact with a non-working surface of the solar receiving panel, and the thermoelectric power generation sheet being connected to the storage battery. According to the system and the method, the refrigerating unit can be driven by using thermoelectromotive force, thereby improving the power of the refrigerating unit, and reducing consumption of electric energy required by the refrigerating unit.

Description

Refrigeration energy-saving system and method for photovoltaic power generation

Technical field

The invention relates to the technical field of photovoltaic power generation and refrigeration technology, and in particular to a refrigeration energy-saving system and method for photovoltaic power generation.

Background technique

Photovoltaic power generation is a technology that converts light energy into electrical energy. Its basic principle is the photovoltaic effect. When photons shine on a metal, all the energy of the photon can be absorbed by an electron in the metal. If the energy absorbed by the electron is large enough, It overcomes the internal gravity of the metal to do work, escapes from the metal surface and becomes photoelectrons, forming a voltage. Possible technical ways to use solar energy to achieve refrigeration mainly include two types: first, convert solar energy into thermal energy and use thermal energy for refrigeration; second, convert solar energy into electrical energy and use electrical energy to drive related equipment for heating and cooling. That is to say, according to different energy conversion methods, solar refrigeration mainly has the following two methods: one is to first realize light-to-electricity conversion, and then use electric refrigeration (photoelectric compression refrigeration); the other is to perform light-to-heat conversion, and then use Thermal energy refrigeration (optoelectronic semiconductor refrigeration).

At present, a common approach is to use the former, which first realizes light-to-electricity conversion and then uses electric energy to drive a conventional compression refrigeration system to achieve refrigeration. That is, the solar receiving panel converts light energy into electric energy, and transfers the electric energy to the battery through wires for cooling and power supply. . During the photo-electric conversion process, the working surface of the solar receiving panel (the side facing the sun) will continuously receive solar energy. Part of the received solar energy will be converted into electrical energy based on the photoelectric effect, and the remaining part will heat the solar receiving panel based on the thermal conduction effect. , since the non-working surface of the solar receiving panel (the side not facing the sun) does not receive solar energy, the temperature of the non-working surface of the solar receiving panel is lower than the temperature of the working surface. This temperature difference can actually be adjusted in the latter way. Utilizing refrigeration (Seebeck effect), but the actual temperature difference is not utilized, resulting in poor energy-saving effect of photovoltaic refrigeration.

Contents of the invention

The invention provides a refrigeration energy-saving system and method for photovoltaic power generation, which solves the technical problem of poor energy-saving effect of photovoltaic power generation refrigeration.

The basic solution provided by the invention is: a refrigeration energy-saving system for photovoltaic power generation, including: a solar receiving panel, the solar receiving panel is connected to a battery, and the battery is connected to a refrigeration unit;

It also includes a thermoelectric power generating sheet, which is composed of several groups of PN-type semiconductors. The non-connected end of the PN-type semiconductor is in contact with the working surface of the solar receiving panel. The connecting end of the PN-type semiconductor is in contact with the working surface of the solar receiving panel. Non-working surface contact, the thermoelectric power generating sheet is connected to the battery;

It also includes a wind direction monitoring module and a direction adjustment module. The wind direction monitoring module is electrically connected to the direction adjustment module. The wind direction monitoring module is used to collect wind direction data. The direction adjustment module is used to adjust the orientation of the solar receiving panel according to the wind direction data, so that The solar receiving panels are parallel to the wind direction.

The working principle and advantage of the present invention are that under temperature gradient, carriers in the PN-type semiconductor move from the hot end to the cold end and accumulate at the cold end, forming a potential difference inside, and generating a reaction under the action of the potential difference. When the charge flow and the internal potential difference reach a dynamic balance, a stable temperature difference electromotive force will be formed at both ends of the PN-type semiconductor. The greater the temperature difference between the two ends of the PN-type semiconductor, the greater the temperature difference electromotive force formed. In this solution, the solar receiving panel converts light energy into electrical energy. During the photo-electric conversion process, the working surface of the solar receiving panel will continuously receive solar energy. Part of the received solar energy will be converted into electrical energy based on the photoelectric effect, and electrical energy is used to drive refrigeration. The unit performs cooling. According to the second law of thermodynamics, all solar energy cannot be converted into electrical energy. The remaining solar energy will heat the solar receiving panel according to the thermal conduction effect. Since the non-working surface of the solar receiving panel does not receive solar energy, the temperature of the non-working surface will increase. Lower than the temperature of the working surface, this temperature difference acts on the thermoelectric generator, causing a temperature difference electromotive force to be formed at both ends of the thermoelectric generator. This temperature difference electromotive force can also be used to drive the refrigeration unit. This temperature difference electromotive force increases the power of the refrigeration unit and can reduce The electric energy consumption required by the refrigeration unit improves the energy-saving effect of photovoltaic power generation for refrigeration. Moreover, the material thermal conductivity of the solar receiving panel is relatively low, and the temperature difference between its working surface and non-working surface is also large, so that the temperature difference electromotive force can be fully utilized to achieve energy saving. the goal of. At the same time, the direction adjustment module can adjust the orientation of the solar receiving panel based on wind direction data so that the solar receiving panel is parallel to the wind direction, improving the stability of the solar receiving panel in the wind.

The invention can use the temperature difference electromotive force to drive the refrigeration unit, improve the power of the refrigeration unit, reduce the power consumption required by the refrigeration unit, and solve the technical problem of poor energy-saving effect of photovoltaic power generation refrigeration.

Further, the battery is provided with a first port and a second port, and the output current of the first port is greater than the output current of the second port; the refrigeration unit is provided with a first interface and a second interface, and the first interface Connected to the first port, the second interface is connected to the second port.

The beneficial effect is that it is equivalent to setting two working modes of high power and low power for the refrigeration unit. The electric energy in the high power working mode is generated by the solar receiving panel, and the electric energy in the low power working mode is generated by the thermoelectric power generation chip. This can achieve both. The matching of two power generation modes and two cooling powers makes the best use of solar energy and improves the energy-saving effect.

Further, the working surface and the non-working surface of the solar receiving panel are respectively provided with a first temperature sensor and a second temperature sensor. The first temperature sensor is used to detect the temperature of the working surface of the solar receiving panel, and the second temperature sensor Used to detect the temperature of the non-working surface of the solar receiving panel; the first temperature sensor and the second temperature sensor are both connected to a controller, and the controller is used to calculate the temperature difference between the working surface and the non-working surface and determine whether the temperature difference is greater than the temperature difference threshold. When the temperature difference is greater than the temperature difference threshold, the controller is also used to control the second interface to be connected to the second port.

The beneficial effect is that only when the temperature difference between the working surface and the non-working surface is large enough, the generated temperature difference electromotive force can drive the refrigeration unit to work alone. If the temperature difference between the working surface and the non-working surface is relatively small, the temperature difference generated will The electric energy is stored in the battery so that it can drive the refrigeration unit together with the electric energy generated by the photovoltaic effect to prevent the electric energy generated by the temperature difference from being wasted if it is too small.

Furthermore, a plurality of water bags are provided on the non-working surface of the solar receiving panel, and the water bags are arranged in an array.

The beneficial effect is that these water bags can absorb heat from the non-working surface of the solar receiving panel, increase the temperature difference between the working surface and the non-working surface, and increase the temperature difference electromotive force, which is conducive to the full utilization of solar energy.

Furthermore, the surface of the thermoelectric power generating sheet is provided with a thermal insulation layer.

The beneficial effect is to prevent the heat loss of the thermoelectric power generation piece and reduce the temperature difference at both ends of the thermoelectric power generation piece to avoid reducing the temperature difference electromotive force.

Further, the number of the solar receiving panels is multiple, and the solar receiving panels are arranged in an array.

The beneficial effect is that multiple solar receiving panels are arranged in an array, and the solar energy is received relatively uniformly, which can accumulate less electric energy into more, make full use of the electric energy converted by solar energy by utilizing the scale effect, and improve the utilization effect of solar energy.

Further, the refrigeration unit is connected to an air outlet unit.

The beneficial effect is that the air outlet unit can blow out cold air and can be suitable for various environments.

Further, the refrigeration unit includes several refrigeration machines arranged in parallel, and the air outlet unit includes several parallel refrigeration machines. Exhaust fan set in column.

The beneficial effect is to prevent refrigeration from being affected when a refrigerator or blower fails.

Based on the refrigeration energy-saving system for photovoltaic power generation provided above, the present invention also provides a refrigeration energy-saving method for photovoltaic power generation, including:

S1. The solar receiving panel uses the photovoltaic effect to convert light energy into electrical energy, and the thermoelectric power generation sheet uses the Seebeck effect to convert thermal energy into electrical energy, and introduces the converted electrical energy into the battery;

S2. The first temperature sensor detects the working surface temperature of the solar receiving panel, and the second temperature sensor detects the non-working surface temperature of the solar receiving panel;

S3. The controller calculates the temperature difference between the working surface and the non-working surface and determines whether the temperature difference is greater than the temperature difference threshold. When the temperature difference is greater than the temperature difference threshold, the controller controls the second interface to be connected to the second port;

S4. The refrigeration unit performs refrigeration.

The working principle and advantage of the invention are: during the process of light-to-electricity conversion, the working surface of the solar receiving panel will continuously receive solar energy, and part of the received solar energy will be converted into electrical energy according to the photoelectric effect. The electrical energy is used to drive the refrigeration unit for refrigeration, and the remaining part is The solar energy will heat the solar receiving panel according to the thermal conduction effect. Since the non-working surface of the solar receiving panel does not receive solar energy, the temperature of the non-working surface is lower than the temperature of the working surface. This temperature difference acts on the thermoelectric power generation sheet, causing the temperature difference to generate electricity. A temperature difference electromotive force is formed at both ends of the film. This temperature difference electromotive force can also be used to drive the refrigeration unit, which can reduce the power consumption required by the refrigeration unit and improve the energy-saving effect of photovoltaic power generation and refrigeration; at the same time, only the working surface and the non-working surface When the temperature difference is large enough, the generated temperature difference electromotive force can drive the refrigeration unit to work alone. If the temperature difference between the working surface and the non-working surface is relatively small, the electric energy generated by the temperature difference is stored in the battery, so that it can produce the photovoltaic effect. The electric energy used to drive the refrigeration unit together prevents the electric energy generated by the temperature difference from being wasted if it is too small.

Description of drawings

Figure 1 is one of the system structural block diagrams of an embodiment of a refrigeration energy-saving system for photovoltaic power generation according to the present invention.

Figure 2 is the second system structural block diagram of an embodiment of a refrigeration energy-saving system for photovoltaic power generation according to the present invention.

Figure 3 is a schematic structural diagram of Embodiment 3 of a refrigeration energy-saving system for photovoltaic power generation according to the present invention.

Detailed ways

The following is a further detailed description through specific implementation methods:

The symbols in the drawings of the manual include: base 1, electric telescopic rod 2, fixed base 3, drive motor 4, vertical plate 5, mounting base 6, photovoltaic panel 7, transmission wheel 8, cleaning layer 9, protective layer 10, transmission Chain 11.

Example 1

The embodiment is basically as shown in Figure 1, and includes: a solar receiving panel, the solar receiving panel is connected to a battery, and the battery is connected to a refrigeration unit; it also includes a thermoelectric power generating sheet, and the thermoelectric generating sheet is composed of several groups of PN type semiconductors. It consists of: the non-coupling end of the PN-type semiconductor is in contact with the working surface of the solar receiving panel, the coupling end of the PN-type semiconductor is in contact with the non-working surface of the solar receiving panel, and the thermoelectric power generating sheet is connected to the battery.

In this embodiment, there are multiple solar receiving panels, and the solar receiving panels are arranged in an array. For example, the number of solar receiving panels is M×N, and M is the number of horizontal rows of solar receiving panels. N is the number of horizontal rows of solar receiving panels. Multiple solar receiving panels are arranged in an array to receive solar energy relatively evenly, which can accumulate less electric energy into more. The scale effect is used to fully utilize the electric energy converted by solar energy and improve the utilization effect of solar energy. The refrigeration unit is connected to an air outlet unit. The air outlet unit can blow out cold air and is suitable for a variety of environments. The refrigeration unit includes several refrigeration machines arranged in parallel. The air outlet unit includes several outlets arranged in parallel. The number of fans, such as refrigeration machines and air outlet fans, is 3 to 5 to prevent the failure of one refrigeration machine or air outlet fan from affecting cooling. The non-working surface of the solar receiving panel is provided with a number of water bags arranged in an array. These water bags can absorb the heat from the non-working surface of the solar receiving panel and increase the distance between the working surface and the non-working surface. The temperature difference increases the temperature difference electromotive force, which is conducive to the full utilization of solar energy; the surface of the thermoelectric power generation sheet is provided with an insulating layer, such as insulating rubber, to prevent the heat loss of the thermoelectric power generation sheet and reduce the temperature difference between the two ends of the thermoelectric power generation sheet to avoid reducing the temperature difference electromotive force.

As one of the preferred solutions, the battery is provided with a first port and a second port. The output current of the first port is greater than the output current of the second port. For example, the output current of the first port is 0.10A, and the output current of the second port is 0.10A. The output current of the port is 0.02A; the refrigeration unit is provided with a first interface and a second interface, the first interface and the first port are connected by a wire, the second interface and the second port are connected by a wire, due to the refrigeration The power of the unit is proportional to the square of its current, which is equivalent to setting two working modes of high power and low power for the refrigeration unit. The electric energy in the high power working mode is generated by the solar receiving panel, and the electric energy in the low power working mode is generated by the thermoelectric generator. Generated, this can achieve the matching of two power generation modes and two cooling powers, making the best use of solar energy and improving energy saving. Effect.

As the second preferred solution, as shown in Figure 2, the working surface and the non-working surface of the solar receiving panel are respectively provided with a first temperature sensor and a second temperature sensor. The first temperature sensor is used to detect the solar receiving panel. The working surface temperature, the second temperature sensor is used to detect the non-working surface temperature of the solar receiving panel, the first temperature sensor and the second temperature sensor both adopt thermocouple induction temperature sensors with a sensitivity of 5 to 40 microvolts/℃; The first temperature sensor and the second temperature sensor are both connected to a controller. The controller adopts a single-chip microcomputer. The controller is used to calculate the temperature difference between the working surface and the non-working surface and determine whether the temperature difference is greater than the temperature difference threshold. When the temperature difference When the value is greater than the temperature difference threshold, the controller is also used to control the second interface to be connected to the second port. Only when the temperature difference between the working surface and the non-working surface is large enough, the generated temperature difference electromotive force can drive the refrigeration unit to work alone. If the temperature difference between the working surface and the non-working surface is relatively small, the electric energy generated by the temperature difference is stored in the battery. , so that it can drive the refrigeration unit together with the electric energy generated by the photovoltaic effect to prevent the electric energy generated by the temperature difference from being wasted if it is too small.

In this embodiment, under the temperature gradient, the carriers in the PN-type semiconductor move from the hot end to the cold end and accumulate at the cold end, forming a potential difference inside, and generating a reverse charge flow under the action of the potential difference. When the charge flow and the internal potential difference reach a dynamic balance, a stable temperature difference electromotive force will be formed at both ends of the PN-type semiconductor. The greater the temperature difference between the two ends of the PN-type semiconductor, the greater the temperature difference electromotive force formed. In this solution, the solar receiving panel converts light energy into electrical energy. During the photo-electric conversion process, the working surface of the solar receiving panel will continuously receive solar energy. Part of the received solar energy will be converted into electrical energy based on the photoelectric effect, and electrical energy is used to drive refrigeration. The unit performs cooling. According to the second law of thermodynamics, all solar energy cannot be converted into electrical energy. The remaining solar energy will heat the solar receiving panel according to the thermal conduction effect. Since the non-working surface of the solar receiving panel does not receive solar energy, the temperature of the non-working surface will increase. Lower than the temperature of the working surface, this temperature difference acts on the thermoelectric generator, causing a temperature difference electromotive force to be formed at both ends of the thermoelectric generator. This temperature difference electromotive force can also be used to drive the refrigeration unit. This temperature difference electromotive force increases the power of the refrigeration unit and can reduce The electric energy consumption required by the refrigeration unit improves the energy-saving effect of photovoltaic power generation for refrigeration. Moreover, the material thermal conductivity of the solar receiving panel is relatively low, and the temperature difference between its working surface and non-working surface is also large, so that the temperature difference electromotive force can be fully utilized to achieve energy saving. the goal of.

Example 2

The only difference from Embodiment 1 is that, in view of Embodiment 1, this embodiment also discloses a device for photovoltaic power generation. The refrigeration energy-saving method includes steps: first, the solar receiving panel uses the photovoltaic effect to convert light energy into electrical energy, and the thermoelectric power generation sheet uses the Seebeck effect to convert thermal energy into electrical energy, and the converted electrical energy is introduced into the battery; then, the first temperature The sensor detects the temperature of the working surface of the solar receiving panel, and the second temperature sensor detects the temperature of the non-working surface of the solar receiving panel; then, the controller calculates the temperature difference between the working surface and the non-working surface and determines whether the temperature difference is greater than the temperature difference threshold. When the temperature difference is greater than the temperature difference threshold, the controller controls the second interface to be connected to the second port; finally, the refrigeration unit performs cooling.

In this embodiment, during the process of light-to-electricity conversion, the working surface of the solar receiving panel will continuously receive solar energy. Part of the received solar energy will be converted into electric energy according to the photoelectric effect. The electric energy will be used to drive the refrigeration unit for cooling, and the remaining part of the solar energy will be The solar receiving panel is heated according to the thermal conduction effect. Since the non-working surface of the solar receiving panel does not receive solar energy, the temperature of the non-working surface is lower than the temperature of the working surface. This temperature difference acts on the thermoelectric power generation sheet, causing the two ends of the thermoelectric power generation sheet to A temperature difference electromotive force is formed, which can also be used to drive the refrigeration unit, which can reduce the power consumption required by the refrigeration unit and improve the energy-saving effect of photovoltaic power generation and refrigeration; at the same time, only the temperature difference between the working surface and the non-working surface is sufficient When the temperature difference is large, the generated temperature difference electromotive force can drive the refrigeration unit to work alone. If the temperature difference between the working surface and the non-working surface is relatively small, the electric energy generated by the temperature difference is stored in the battery, so that it can be driven together with the electric energy generated by the photovoltaic effect. The refrigeration unit prevents the electric energy generated by the temperature difference from being wasted when it is too small.

Example 3

The only difference from Embodiment 2 is that, as shown in Figure 3, it includes a photovoltaic module, which includes a photovoltaic panel 7 (that is, a solar receiving panel), a wind direction monitoring module, a wind speed monitoring module, a power storage module and a direction monitoring module. Adjustment module, photovoltaic panel 7 is electrically connected to the power storage module; the photovoltaic panel 7 is provided with a base 1, and the power storage module is located inside the base 1, using a 12V 200AH lithium battery; the wind direction monitoring module is used to collect wind direction data, The wind speed monitoring module is used to collect wind speed data. The wind direction monitoring module and the wind speed monitoring module are electrically connected to a direction adjustment module. The direction adjustment module is used to adjust the orientation of the photovoltaic panel 7 according to the wind direction data so that the photovoltaic panel 7 is parallel to the wind direction. .

There is a bearing seat in the middle of the upper surface of the base 1. There is an electric telescopic rod 2 passing through the bearing seat inside the base 1. The electric telescopic rod 2 is a rotatable electric telescopic rod 2. The top of the electric telescopic rod 2 is equipped with a bearing seat. There is a fixed base 3, and the upper surface of the fixed base 3 is provided with two mutually parallel arc-shaped hinge plates. The bottom of the photovoltaic panel 7 is provided with a mounting base 6. The lower surface of the mounting base 6 is provided with a vertical vertical plate 5 that is adapted to the arc-shaped hinge plate. The vertical vertical plate 5 is arranged horizontally. There is a rotating axis. The surface of the arc-shaped hinge plate is provided with a through hole for the rotating shaft to pass through. A motor 4 is provided on one side of the arc-shaped hinge plate. The motor 4 is electrically connected to the controller. The output shaft of the motor 4 is connected to the rotating shaft. Shaft transmission connection, the direction adjustment module is used to control the orientation of the photovoltaic panel 7 by controlling the rotation of the electric telescopic rod 2 and the output shaft of the motor 4.

The photovoltaic module also includes a height adjustment module, which is used to adjust the length of the electric telescopic pole 2 . The direction adjustment module is provided with a first wind speed threshold and a second wind speed threshold. When the wind speed reaches the first wind speed threshold, the direction adjustment module adjusts the orientation of the photovoltaic panel 7 according to the wind direction data so that the photovoltaic panel 7 is parallel to the wind direction. When the wind speed reaches the third When a wind speed threshold is reached, the direction adjustment module controls the rotation of the output shaft of the motor 4 according to the wind direction to adjust the direction of the photovoltaic panels 7. When the wind speed reaches the first wind speed threshold, the direction adjustment module controls the photovoltaic panels 7 to be parallel to the wind direction according to the wind direction data, reducing the photovoltaic The wind resistance of the panel 7 reduces the probability of the photovoltaic panel 7 being damaged or blown away in windy weather. When the wind speed reaches the second wind speed threshold, the direction adjustment module is also used to control the photovoltaic panel 7 to be parallel to the base 1. The height adjustment module controls the contraction of the electric telescopic rod 2 to lower the height of the photovoltaic panel 7 so that the photovoltaic panel 7 is as close to the base 1 as possible to avoid the electric telescopic rod 2 being too long and breaking due to excessive swing in the wind, thereby improving the stability of the photovoltaic panel 7. Stability in the wind.

In addition, there is also a board cleaning mechanism, which includes a cleaning component, a transmission mechanism and a water storage tank; the transmission mechanism includes a transmission chain 11, a transmission wheel 8 and a drive motor 4. The wheels 8 are symmetrically arranged at both ends of the photovoltaic panel 7. The drive motor 4 is used to drive the transmission wheel 8 to rotate. The transmission wheel 8 on the same side is connected to the periphery of the transmission chain 11, and a cloth shaft is provided between the transmission wheels 8 at either end; The cleaning assembly includes a cleaning plate and a connecting water pipe; the cleaning plate includes a protective layer 10 and a cleaning layer 9. A cavity is provided between the protective layer 10 and the cleaning layer 9. A connecting water pipe is provided on the side of the cleaning plate. The cavity and the reservoir are connected through a connecting water pipe. The entire cleaning plate is made of flexible material. One end of the cleaning plate is fixedly connected to the cloth shaft. Both sides of the other end of the cleaning plate are fixedly connected to the transmission chain 11. Through the transmission wheel 8 Rotating in different directions, the cleaning plate can not only cover the surface of the photovoltaic panel 7 along with the transmission chain 11, but also wrap around the surface of the cloth shaft along with the rotation of the transmission wheel 8. The outer surface of the cleaning layer 9 is wavy, and the surface is provided with a brush. The top of the arc in contact with the surface of the photovoltaic panel 7 is provided with a water outlet, and a one-way valve is provided at the water outlet.

When the wind speed reaches the first wind speed threshold, the driving motor 4 drives the transmission wheel 8 to rotate to unfold the cleaning plate. When the wind speed is lower than the first wind speed threshold, the driving motor 4 drives the transmission wheel 8 to rotate and retract the cleaning plate. During the specific implementation, during the expansion process of the cleaning plate, the internal cavity of the cleaning plate is stretched, and under the action of negative pressure, the water in the reservoir is sucked into the cavity; after the cleaning plate is fully expanded, the cleaning layer 9 is An air channel is formed between the surface and the photovoltaic panel 7, When strong wind blows, the pressure in the channel is also different due to the change of the width of the channel (Bernoulli's principle). Since the water outlet is set at the top of the arc where the outer surface of the cleaning layer 9 is in contact with the surface of the photovoltaic panel 7, the inside of the cleaning panel is The water in the cavity is sucked out under the action of negative pressure, thereby cleaning the surface of the photovoltaic panel 7; in addition, because the entire cleaning layer 9 is made of flexible material, the outer surface of the cleaning layer 9 will be generated under the action of wind. A certain wave deformation allows the brush on its surface to scrub the surface of the photovoltaic panel 7 to improve its cleaning effect.

The above are only embodiments of the present invention. Common knowledge such as the specific structures and characteristics of the solutions are not described in detail here. Those of ordinary skill in the art are aware of all common knowledge in the technical field to which the invention belongs before the filing date or priority date. Technical knowledge, being able to know all the existing technologies in the field, and having the ability to apply conventional experimental methods before that date. Persons of ordinary skill in the field can, under the inspiration given by this application, combine their own abilities to perfect and implement this plan, Some typical well-known structures or well-known methods should not be an obstacle for those of ordinary skill in the art to implement the present application. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention and will not affect the implementation of the present invention. effectiveness and patented practicality. The scope of protection claimed in this application shall be based on the content of the claims, and the specific implementation modes and other records in the description may be used to interpret the content of the claims.

Claims

A refrigeration energy-saving system for photovoltaic power generation, including: a solar receiving panel, the solar receiving panel is connected to a battery, and the battery is connected to a refrigeration unit;

It is characterized in that it also includes a thermoelectric power generating sheet, which is composed of several groups of PN type semiconductors. The non-connected end of the PN type semiconductor is in contact with the working surface of the solar receiving panel, and the connecting end of the PN type semiconductor is in contact with the working surface of the solar receiving panel. The non-working surface of the solar receiving panel is in contact, and the thermoelectric power generating sheet is connected to the battery;

It also includes a wind direction monitoring module and a direction adjustment module. The wind direction monitoring module is electrically connected to the direction adjustment module. The wind direction monitoring module is used to collect wind direction data. The direction adjustment module is used to adjust the orientation of the solar receiving panel according to the wind direction data, so that The solar receiving panels are parallel to the wind direction.
The refrigeration energy-saving system for photovoltaic power generation according to claim 1, wherein the battery is provided with a first port and a second port, and the output current of the first port is greater than the output current of the second port; The refrigeration unit is provided with a first interface and a second interface, the first interface is connected to the first port, and the second interface is connected to the second port.
The refrigeration energy-saving system for photovoltaic power generation according to claim 2, wherein the working surface and the non-working surface of the solar receiving panel are respectively provided with a first temperature sensor and a second temperature sensor, and the first temperature sensor The sensor is used to detect the temperature of the working surface of the solar receiving panel, and the second temperature sensor is used to detect the temperature of the non-working surface of the solar receiving panel; the first temperature sensor and the second temperature sensor are both connected to a controller, and the controller is In order to calculate the temperature difference between the working surface and the non-working surface and determine whether the temperature difference is greater than the temperature difference threshold, when the temperature difference is greater than the temperature difference threshold, the controller is also used to control the second interface to be connected to the second port.
The refrigeration energy-saving system for photovoltaic power generation according to claim 3, wherein a plurality of water bags are provided on the non-working surface of the solar receiving panel, and the water bags are arranged in an array.
The refrigeration energy-saving system for photovoltaic power generation according to claim 4, wherein the surface of the thermoelectric power generation sheet is provided with a thermal insulation layer.
The refrigeration energy-saving system for photovoltaic power generation according to claim 5, characterized in that the number of the solar receiving panels is multiple, and the solar receiving panels are arranged in an array.
The refrigeration energy-saving system for photovoltaic power generation according to claim 6, wherein the refrigeration unit is connected to an air outlet unit.
The refrigeration energy-saving system for photovoltaic power generation according to claim 7, wherein the refrigeration unit includes several refrigeration machines arranged in parallel, and the air outlet unit includes several air outlets arranged in parallel.
A refrigeration energy-saving method for photovoltaic power generation, characterized by including:

S1. The solar receiving panel uses the photovoltaic effect to convert light energy into electrical energy, and the thermoelectric power generation sheet uses the Seebeck effect to convert thermal energy into electrical energy, and introduces the converted electrical energy into the battery;

S2. The first temperature sensor detects the working surface temperature of the solar receiving panel, and the second temperature sensor detects the non-working surface temperature of the solar receiving panel;

S3. The controller calculates the temperature difference between the working surface and the non-working surface and determines whether the temperature difference is greater than the temperature difference threshold. When the temperature difference is greater than the temperature difference threshold, the controller controls the second interface to be connected to the second port;

S4. The refrigeration unit performs refrigeration.