Photovoltaic waste heat utilization system

Abstract

The invention relates to the technical field of photovoltaic waste heat utilization, in particular to a photovoltaic waste heat utilization system which comprises an installation frame and a photovoltaic panel, the photovoltaic panel is installed on the inner side of the installation frame, a heat collection assembly is arranged on the lower side of the photovoltaic panel and comprises a heat collection pipe, the heat collection pipe is pasted to the lower surface of the photovoltaic panel, and the heat collection pipe is connected with the installation frame. And a first supporting frame is arranged on one side of the outer surface of the heat collecting pipe, a second supporting frame is arranged on the side, away from the first supporting frame, of the outer surface of the heat collecting pipe, and the second supporting frame is fixedly installed on the surface of the installation frame. On one hand, domestic water can be heated, electricity consumption can be reduced, and the utilization rate of waste heat can be increased, on the other hand, a medium after heat absorption can be cooled, the cooling effect can be improved in cooperation with the stirring assembly, the effect of next heat absorption can be improved, and therefore the purpose of circulating heat absorption is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic waste heat utilization, and in particular to a photovoltaic waste heat utilization system. Background Art

[0002] Photovoltaics refers to a power generation system that uses the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. The energy it absorbs comes from inexhaustible solar energy. It is a clean, safe and renewable energy source. Moreover, the photovoltaic power generation process does not pollute the environment or damage the ecology. It has been rapidly popularized and entered people's lives. Photovoltaic panels are laid on the roofs of many residential buildings for household electricity use.

[0003] However, only about 24% of solar energy is converted into electricity in conventional photovoltaic panels, and their optimal operating temperature should be maintained below 25°C. Once the temperature exceeds this standard, the power generation efficiency will decrease, and the efficiency will decrease by 0.4-0.5% for every degree increase. In addition, excessively high temperatures not only affect the power generation efficiency of photovoltaic panels, but also pose a threat to their service life. High temperature environments may cause hot spots in photovoltaic panels, and in severe cases may even cause photovoltaic modules to catch fire, posing a major hidden danger to operational safety. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a photovoltaic waste heat utilization system, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a photovoltaic waste heat utilization system, comprising a mounting frame and a photovoltaic panel, wherein the photovoltaic panel is mounted on the inner side of the mounting frame, a heat collecting assembly is arranged on the lower side of the photovoltaic panel, the heat collecting assembly comprises a heat collecting tube, the heat collecting tube is pasted on the lower surface of the photovoltaic panel, a first support frame is arranged on one side of the outer surface of the heat collecting tube, a second support frame is arranged on the side of the outer surface of the heat collecting tube away from the first support frame, the second support frame is fixedly mounted on the surface of the mounting frame, and the heat collecting tube is located on the inner side of the first support frame and the second support frame;

[0006] A heat-generating water-collecting pump box is fixedly mounted on the outer surface of one end of the heat-collecting tube, a first conduit is fixedly mounted on one end of the heat-generating water-collecting pump box, a first circulating water tank is fixedly mounted on the end of the first conduit away from the heat-generating water-collecting pump box, a cooling water-collecting pump box is fixedly mounted on the end of the heat-collecting tube away from the heat-generating water-collecting pump box, a second conduit is fixedly mounted on one end of the cooling water-collecting pump box, and a second circulating water tank is fixedly mounted on the end of the second conduit away from the cooling water-collecting pump box;

[0007] A third conduit is fixedly installed at one end of the second circulating water tank away from the second conduit, a heat exchanger is fixedly installed at one end of the third conduit away from the second circulating water tank, a fourth conduit is fixedly installed at one end of the heat exchanger away from the third conduit, and one end of the fourth conduit away from the heat exchanger is fixedly connected to the first circulating water tank;

[0008] A first domestic water pipe is fixedly installed on one end of the heat exchanger away from the third conduit and the fourth conduit, and a second domestic water pipe is fixedly installed on one end of the heat exchanger away from the first domestic water pipe;

[0009] The second circulating water tank is provided with a heat generating component, and the heat generating component is used to improve the utilization rate of waste heat.

[0010] Optionally, the heat generating assembly includes a mounting member, the mounting member is fixedly mounted on an end of the second circulating water tank away from the second conduit, a first gear is movably mounted on the mounting member, a second gear is meshed on an outer peripheral side of the first gear, and the number of the second gears is greater than one;

[0011] A first bevel gear is fixedly mounted on the middle of the second gear on the upper side, a second bevel gear is meshed on the upper side of the first bevel gear, a first rotating shaft is fixedly mounted on the middle of the upper surface of the second bevel gear, and a fan blade is fixedly mounted on the outer peripheral side of the upper end of the first rotating shaft;

[0012] A water-passing groove is provided in the middle of the inner cavity of the second circulating water tank, a heat-generating groove is provided near the edge of the inner cavity of the second circulating water tank, a heat-insulating layer is provided on the inner cavity wall of the heat-generating groove away from the water-passing groove, and a friction layer is provided on the inner cavity wall of the heat-generating groove close to the water-passing groove;

[0013] A second rotating shaft is fixedly installed in the middle of the second gear, and a friction piece is fixedly sleeved on the outer surface of the second rotating shaft. A third rotating shaft is detachably installed in the middle of the first gear, and a first stirring blade is fixedly installed on the outer surface of the third rotating shaft.

[0014] Optionally, a stirring assembly is provided on the second gear near the heat exchanger, and the stirring assembly includes a first rotating wheel, and the first rotating wheel is fixedly mounted on a second rotating shaft at the middle of the second gear near the heat exchanger;

[0015] The outer surface of the first rotating wheel is connected to a transmission belt, and the side of the transmission belt away from the first rotating wheel is connected to the second rotating wheel. A fourth rotating shaft is fixedly installed in the middle of the second rotating wheel, and a second stirring blade is fixedly installed on the outer surface of the fourth rotating shaft. The second stirring blade is located in the inner cavity of the first circulating water tank, and the fourth rotating shaft is movably connected to the first circulating water tank.

[0016] Optionally, a temperature difference power generation device is provided in the first circulating water tank and the second circulating water tank, and an induction coil is connected to the temperature difference power generation device. The induction coil is sleeved on the outer peripheral side of the second circulating water tank, and the second circulating water tank is made of good conductor metal.

[0017] Optionally, a fixing frame is fixedly mounted on the upper surface of the second circulating water tank, and the first rotating shaft is movably connected to the fixing frame.

[0018] Optionally, the friction member is in a heat generating tank, the first stirring blade is in a water passage tank, and the second rotating shaft and the third rotating shaft are movably connected through uniform mounting members.

[0019] Optionally, the friction member contacts the friction layer and does not contact the thermal insulation layer when rotating.

[0020] Optionally, the circumference of the first gear is four times the circumference of the second gear, and the circumference of the second bevel gear is four times the circumference of the first bevel gear.

[0021] The present invention provides a photovoltaic waste heat utilization system, which has the following beneficial effects:

[0022] 1. The photovoltaic waste heat utilization system can absorb the excess heat of the photovoltaic panel through the heat collection component. On the one hand, it can heat domestic water, reduce electricity consumption, and improve the utilization rate of waste heat. On the other hand, it can cool the medium after absorbing heat, and cooperate with the stirring component to improve the cooling effect, which can improve the effect of absorbing heat next time, thereby achieving the purpose of cyclic heat absorption.

[0023] 2. The photovoltaic waste heat utilization system can increase the temperature difference between the second circulation water tank and the first circulation water tank through the cooperation between the heat generating component and the stirring component, improve the heating efficiency of the induction coil, and thus improve the heat exchange efficiency of the heat exchanger. In addition, the heat generating component can be used in winter with windy and snowy weather to heat the medium, improve the power generation efficiency of the photovoltaic panel, and assist in melting and clearing snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 The structure of the present invention is shown in FIG. Figure 3 ;

[0027] Figure 4 The structure of the present invention is shown in FIG. Figure 4 ;

[0028] Figure 5It is a schematic diagram of the structure inside the first circulating water tank of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure inside the second circulating water tank of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the first gear of the present invention;

[0031] Figure 8 It is a schematic diagram of the cross-sectional structure of the second circulating water tank of the present invention.

[0032] In the figure: 1, mounting frame; 11, photovoltaic panel; 2, heat collecting tube; 21, first support frame; 22, second support frame; 23, heat generating water collecting pump box; 24, first conduit; 25, first circulating water tank; 26, cooling water collecting pump box; 27, second conduit; 28, second circulating water tank; 29, third conduit; 210, heat exchanger; 211, fourth conduit; 212, first domestic water pipe; 213, second domestic water pipe; 3, mounting piece; 31, first gear; 32, second gear wheel; 33, first bevel gear; 34, second bevel gear; 35, first rotating shaft; 36, fan blade; 37, fixing frame; 38, water trough; 39, heat generating groove; 310, insulation layer; 311, friction layer; 312, second rotating shaft; 313, friction member; 314, third rotating shaft; 315, first stirring blade; 4, first rotating wheel; 41, transmission belt; 42, second rotating wheel; 43, fourth rotating shaft; 44, second stirring blade; 5, temperature difference power generation device; 51, induction coil. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1: Please refer to Figures 1 to 5 The present invention provides a technical solution: a photovoltaic waste heat utilization system, comprising a mounting frame 1 and a photovoltaic panel 11, the photovoltaic panel 11 is mounted on the inner side of the mounting frame 1, a heat collecting assembly is arranged on the lower side of the photovoltaic panel 11, the heat collecting assembly comprises a heat collecting tube 2, the heat collecting tube 2 is pasted on the lower surface of the photovoltaic panel 11, a first support frame 21 is arranged on one side of the outer surface of the heat collecting tube 2, a second support frame 22 is arranged on the side of the outer surface of the heat collecting tube 2 away from the first support frame 21, the second support frame 22 is fixedly mounted on the surface of the mounting frame 1, and the heat collecting tube 2 is located on the inner side of the first support frame 21 and the second support frame 22;

[0035] A heat-generating water-collecting pump box 23 is fixedly mounted on the outer surface of one end of the heat-collecting pipe 2, a first conduit 24 is fixedly mounted on one end of the heat-generating water-collecting pump box 23, a first circulating water tank 25 is fixedly mounted on one end of the first conduit 24 away from the heat-generating water-collecting pump box 23, a cooling water-collecting pump box 26 is fixedly mounted on one end of the heat-collecting pipe 2 away from the heat-generating water-collecting pump box 23, a second conduit 27 is fixedly mounted on one end of the cooling water-collecting pump box 26, and a second circulating water tank 28 is fixedly mounted on one end of the second conduit 27 away from the cooling water-collecting pump box 26;

[0036] A third conduit 29 is fixedly installed at one end of the second circulating water tank 28 away from the second conduit 27, a heat exchanger 210 is fixedly installed at one end of the third conduit 29 away from the second circulating water tank 28, a fourth conduit 211 is fixedly installed at one end of the heat exchanger 210 away from the third conduit 29, and one end of the fourth conduit 211 away from the heat exchanger 210 is fixedly connected to the first circulating water tank 25;

[0037] A first life water pipe 212 is fixedly installed on one end of the heat exchanger 210 away from the third conduit 29 and the fourth conduit 211, and a second life water pipe 213 is fixedly installed on one end of the heat exchanger 210 away from the first life water pipe 212;

[0038] The second circulating water tank 28 is provided with a heat generating component, which is used to improve the utilization rate of waste heat.

[0039] Specifically, when in use, cold water is input into the heat-generating water collecting pump box 23 as a cooling medium, and the cold water is used to flow in the inner cavity of the heat collecting pipe 2. When the cold water passes through the photovoltaic panel 11, it absorbs the excess heat on the photovoltaic panel 11 and flows into the cooling water collecting pump box 26. In this way, the excess heat on the photovoltaic panel 11 can be absorbed, and the temperature of the photovoltaic panel 11 is prevented from being too high, which affects the power generation efficiency, and at the same time, the temperature of the photovoltaic panel 11 is prevented from being too high, which may cause a fire risk.

[0040] The water after absorbing heat will pass through the cooling water collecting pump box 26 and enter the heat exchanger 210 through the second circulating water tank 28. At this time, the domestic water is passed into the heat exchanger 210 through the first domestic water pipe 212 for heat exchange. On the one hand, the domestic water can be heated to reduce electricity consumption and improve the utilization rate of waste heat. On the other hand, the medium after absorbing heat can be cooled to improve the effect of absorbing heat next time, thereby achieving the purpose of circulating heat absorption.

[0041] Example 2: Please refer to Figures 5 to 8 The heat generating assembly includes a mounting member 3, which is fixedly mounted on an end of the second circulating water tank 28 away from the second conduit 27, and a first gear 31 is movably mounted on the mounting member 3, and a second gear 32 is meshed on the outer peripheral side of the first gear 31, and the number of the second gears 32 is greater than one;

[0042] A first bevel gear 33 is fixedly mounted in the middle of the upper second gear 32, a second bevel gear 34 is meshed on the upper side of the first bevel gear 33, a first rotating shaft 35 is fixedly mounted in the middle of the upper surface of the second bevel gear 34, and a fan blade 36 is fixedly mounted on the outer peripheral side of the upper end of the first rotating shaft 35;

[0043] A water groove 38 is provided in the middle of the inner cavity of the second circulating water tank 28, a heat generating groove 39 is provided near the edge of the inner cavity of the second circulating water tank 28, a heat insulation layer 310 is provided on the inner cavity wall of the heat generating groove 39 away from the water groove 38, and a friction layer 311 is provided on the inner cavity wall of the heat generating groove 39 close to the water groove 38;

[0044] A second rotating shaft 312 is fixedly mounted in the middle of the second gear 32, and a friction member 313 is fixedly sleeved on the outer surface of the second rotating shaft 312. A third rotating shaft 314 is detachably mounted in the middle of the first gear 31, and a first stirring blade 315 is fixedly mounted on the outer surface of the third rotating shaft 314.

[0045] A fixing frame 37 is fixedly mounted on the upper surface of the second circulating water tank 28 , and the first rotating shaft 35 is movably connected to the fixing frame 37 .

[0046] The friction member 313 is in the heat generating groove 39 , the first stirring blade 315 is in the water passing groove 38 , and the second rotating shaft 312 and the third rotating shaft 314 are movably connected to the even mounting member 3 .

[0047] When the friction member 313 rotates, it contacts the friction layer 311 and does not contact the heat-insulating layer 310 .

[0048] The circumference of the first gear 31 is four times that of the second gear 32 , and the circumference of the second bevel gear 34 is four times that of the first bevel gear 33 ;

[0049] A stirring assembly is provided on the second gear 32 near the heat exchanger 210, and the stirring assembly includes a first rotating wheel 4, and the first rotating wheel 4 is fixedly mounted on the second rotating shaft 312 in the middle of the second gear 32 near the heat exchanger 210;

[0050] The outer surface of the first rotating wheel 4 is transmission-connected with a transmission belt 41, and the side of the transmission belt 41 away from the first rotating wheel 4 is transmission-connected with a second rotating wheel 42, a fourth rotating shaft 43 is fixedly installed in the middle of the second rotating wheel 42, and a second stirring blade 44 is fixedly installed on the outer surface of the fourth rotating shaft 43, the second stirring blade 44 is located in the inner cavity of the first circulating water tank 25, and the fourth rotating shaft 43 is movably connected to the first circulating water tank 25.

[0051] The first circulating water tank 25 and the second circulating water tank 28 are provided with a temperature difference power generation device 5, and the temperature difference power generation device 5 is connected with an induction coil 51, and the induction coil 51 is sleeved on the outer peripheral side of the second circulating water tank 28. The second circulating water tank 28 is made of good conductor metal.

[0052] The photovoltaic device for daily use is usually installed on the roof of a residential building to avoid other buildings blocking the sunlight and improve the efficiency of photovoltaic power generation. At the same time, the roof is not blocked, and the wind can directly act on the fan blades 36, so that the fan blades 36 drive the first rotating shaft 35 to rotate, and the first rotating shaft 35 can drive the second bevel gear 34 to rotate, so that the second bevel gear 34 drives the first bevel gear 33 to rotate, and the first bevel gear 33 can drive the second gear 32 to rotate, so that the second gear 32 drives the first gear 31 to rotate, thereby causing the other second gears 32 to rotate;

[0053] When the second gear 32 rotates, the second rotating shaft 312 is driven to rotate, so that the second rotating shaft 312 drives the friction member 313 to rotate. The friction between the friction member 313 and the friction layer 311 can generate heat, thereby heating the water in the water tank 38, which can improve the heat exchange efficiency of domestic water.

[0054] Furthermore, the temperature difference between the first circulating water tank 25 and the second circulating water tank 28 can be used to generate electricity through the temperature difference power generation device 5, and the second circulating water tank 28 can be heated in cooperation with the induction coil 51, so as to further improve the heat exchange efficiency of domestic water. When the second gear 32 rotates, the first rotating wheel 4 can be driven to rotate, so that the first rotating wheel 4 drives the transmission belt 41, and the transmission belt 41 can be used to drive the second rotating wheel 42 to rotate, so that the second rotating wheel 42 drives the fourth rotating shaft 43 to rotate, so that the second stirring blade 44 stirs the medium in the inner cavity of the first circulating water tank 25, and assists the first circulating water tank 25 to heat the second circulating water tank 28. The water tank 25 dissipates heat to the medium, improves the cooling effect of the first circulating water tank 25, and makes the heat collecting pipe 2 more efficient in absorbing heat. The friction member 313 is used to heat the medium in the second circulating water tank 28, which can increase the temperature difference between the medium in the first circulating water tank 25 and the medium in the second circulating water tank 28, thereby improving the power generation effect of the temperature difference power generation device 5, thereby promoting the temperature rise of the water in the second circulating water tank 28, and further improving the heating effect of domestic water. It should be noted that the fixed connection between the third rotating shaft 314 and the first gear 31 must be disconnected to prevent the first stirring blade 315 from rotating to cause heat dissipation and affect the heating of the medium.

[0055] Furthermore, in winter, it is necessary to release the medium in the inner cavity of the first circulating water tank 25 and the second circulating water tank 28 to avoid ice formation inside and cracking of the pipe. However, if it is in a windy area, it is not necessary to release the medium, and the friction member 313 can be driven by wind to rotate to heat the medium in the inner cavity of the second circulating water tank 28. At this time, the third rotating shaft 314 and the first gear 31 need to be fixedly connected, so that when the first gear 31 rotates, the third rotating shaft 314 is driven to rotate, thereby rotating the third rotating shaft 314. Since the circumference of the first gear 31 is four times that of the second gear 32, the rotation speed of the first gear 31 will be slower at this time, so that the first stirring blade 315 rotates slowly in the water trough 38, and then stirs the medium, further avoiding the freezing of the medium, while reducing the heat dissipation effect of the medium.

[0056] When the second gear 32 rotates, it drives the first rotating wheel 4 to rotate, thereby causing the second stirring blade 44 to rotate. At this time, the second stirring blade 44 stirs the medium in the first circulating water tank 25 to prevent it from freezing. The next day, the medium is circulated, and the heat of the medium can be used to heat the photovoltaic power generation, thereby improving the photovoltaic power generation efficiency.

[0057] In addition, if there is windy and snowy weather, for some snow accumulated on the photovoltaic surface, the medium carrying heat can be used to assist in melting the snow and provide assistance in clearing the snow. However, it should be noted that in winter, the heat exchange of the heat exchanger 210 must be disconnected to prevent the heat of the medium from being absorbed by domestic water.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic waste heat utilization system, comprising a mounting frame (1) and a photovoltaic panel (11), wherein the photovoltaic panel (11) is mounted on the inner side of the mounting frame (1), characterized in that: A heat collecting assembly is arranged on the lower side of the photovoltaic panel (11), and the heat collecting assembly comprises a heat collecting tube (2), the heat collecting tube (2) is adhered to the lower surface of the photovoltaic panel (11), a first support frame (21) is arranged on one side of the outer surface of the heat collecting tube (2), a second support frame (22) is arranged on the side of the outer surface of the heat collecting tube (2) away from the first support frame (21), the second support frame (22) is fixedly mounted on the surface of the mounting frame (1), and the heat collecting tube (2) is located on the inner side of the first support frame (21) and the second support frame (22); A heat generating water collecting pump box (23) is fixedly mounted on the outer surface of one end of the heat collecting pipe (2); a first conduit (24) is fixedly mounted on one end of the heat generating water collecting pump box (23); a first circulating water tank (25) is fixedly mounted on the end of the first conduit (24) away from the heat generating water collecting pump box (23); a cooling water collecting pump box (26) is fixedly mounted on the end of the heat collecting pipe (2) away from the heat generating water collecting pump box (23); a second conduit (27) is fixedly mounted on one end of the cooling water collecting pump box (26); a second circulating water tank (28) is fixedly mounted on the end of the second conduit (27) away from the cooling water collecting pump box (26); A third conduit (29) is fixedly mounted on one end of the second circulating water tank (28) away from the second conduit (27); a heat exchanger (210) is fixedly mounted on one end of the third conduit (29) away from the second circulating water tank (28); a fourth conduit (211) is fixedly mounted on one end of the heat exchanger (210) away from the third conduit (29); and one end of the fourth conduit (211) away from the heat exchanger (210) is fixedly connected to the first circulating water tank (25); A first domestic water pipe (212) is fixedly mounted on one end of the heat exchanger (210) away from the third conduit (29) and the fourth conduit (211), and a second domestic water pipe (213) is fixedly mounted on one end of the heat exchanger (210) away from the first domestic water pipe (212); The second circulating water tank (28) is provided with a heat generating component, and the heat generating component is used to improve the utilization rate of waste heat.

2. A photovoltaic waste heat utilization system according to claim 1, characterized in that: The heat generating component comprises a mounting member (3), the mounting member (3) being fixedly mounted on an end of the second circulating water tank (28) away from the second conduit (27), a first gear (31) being movably mounted on the mounting member (3), a second gear (32) being meshed on an outer peripheral side of the first gear (31), and the number of the second gears (32) being greater than one; A first bevel gear (33) is fixedly mounted in the middle of the second gear (32) on the upper side, a second bevel gear (34) is meshed on the upper side of the first bevel gear (33), a first rotating shaft (35) is fixedly mounted in the middle of the upper surface of the second bevel gear (34), and a fan blade (36) is fixedly mounted on the outer peripheral side of the upper end of the first rotating shaft (35); A water-passing groove (38) is provided in the middle of the inner cavity of the second circulating water tank (28), a heat-generating groove (39) is provided near the edge of the inner cavity of the second circulating water tank (28), a heat-insulating layer (310) is provided on the inner cavity wall of the heat-generating groove (39) away from the water-passing groove (38), and a friction layer (311) is provided on the inner cavity wall of the heat-generating groove (39) near the water-passing groove (38); A second rotating shaft (312) is fixedly mounted in the middle of the second gear (32), and a friction member (313) is fixedly sleeved on the outer surface of the second rotating shaft (312). A third rotating shaft (314) is detachably mounted in the middle of the first gear (31), and a first stirring blade (315) is fixedly mounted on the outer surface of the third rotating shaft (314).

3. A photovoltaic waste heat utilization system according to claim 2, characterized in that: A stirring assembly is provided on the second gear (32) on the side close to the heat exchanger (210), and the stirring assembly comprises a first rotating wheel (4), and the first rotating wheel (4) is fixedly mounted on a second rotating shaft (312) in the middle of the second gear (32) on the side close to the heat exchanger (210); The outer surface of the first rotating wheel (4) is transmission-connected with a transmission belt (41), and the side of the transmission belt (41) away from the first rotating wheel (4) is transmission-connected with a second rotating wheel (42), a fourth rotating shaft (43) is fixedly mounted in the middle of the second rotating wheel (42), a second stirring blade (44) is fixedly mounted on the outer surface of the fourth rotating shaft (43), the second stirring blade (44) is located in the inner cavity of the first circulating water tank (25), and the fourth rotating shaft (43) is movably connected to the first circulating water tank (25).

4. A photovoltaic waste heat utilization system according to claim 3, characterized in that: The first circulating water tank (25) and the second circulating water tank (28) are provided with a temperature difference power generation device (5), the temperature difference power generation device (5) is connected with an induction coil (51), the induction coil (51) is sleeved on the outer peripheral side of the second circulating water tank (28), and the second circulating water tank (28) is made of a good conductor metal.

5. A photovoltaic waste heat utilization system according to claim 4, characterized in that: A fixing frame (37) is fixedly mounted on the upper surface of the second circulating water tank (28), and the first rotating shaft (35) is movably connected to the fixing frame (37).

6. A photovoltaic waste heat utilization system according to claim 5, characterized in that: The friction member (313) is located in the heat generating groove (39), the first stirring blade (315) is located in the water passage groove (38), and the second rotating shaft (312) and the third rotating shaft (314) are movably connected to the uniform mounting member (3).

7. A photovoltaic waste heat utilization system according to claim 6, characterized in that: When the friction member (313) rotates, it contacts the friction layer (311) and does not contact the thermal insulation layer (310).

8. The photovoltaic waste heat utilization system according to claim 7, characterized in that: The circumference of the first gear (31) is four times the circumference of the second gear (32), and the circumference of the second bevel gear (34) is four times the circumference of the first bevel gear (33).

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