A wall-mounted photovoltaic water heater

Abstract

The present application relates to the technical field of water heater, especially to a wall-mounted photovoltaic water heater, comprising a water heater and a photovoltaic panel arranged outside a balcony, the photovoltaic panel directly supplies power to the water heater, and a mounting frame for mounting on a wall is arranged at the rear side of the water heater, and a fixed block is fixedly connected to the inner side of the mounting frame at the upper and lower ends, in the installation stage, the developer only needs to fix the mounting frame on the wall through expansion bolts, then in the later user decoration, the water heater can be pulled out of the mounting frame, the X-shaped hinge composed of the upper rod and the lower rod is pulled out, the worker can operate the brick paving and the like, and the brick paving position can be attached to the side of the mounting frame, the cost of wall bricks is saved, finally, after the decoration is completed, the water heater is pushed back and locked through the limiting mechanism, not only the cost of finding a worker for disassembly and assembly is saved, but also the phenomenon of damage caused by repeated stress is avoided, and the convenience of the device is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and more particularly to a wall-mounted photovoltaic water heater. Background Technology

[0002] Photovoltaic power generation is a technology that directly converts light energy into electrical energy using the photovoltaic effect at the semiconductor interface. It mainly consists of three parts: solar panels, controllers, and inverters. The main components are made of electronic components. Solar cells are connected in series and then encapsulated for protection to form large-area solar cell modules. Combined with power controllers and other components, a photovoltaic power generation device is formed. Photovoltaic water heaters use the electrical energy converted from sunlight to heat water. The water is heated by photovoltaic heating rods for hot water and heating. The energy cost is almost zero. Only on cloudy or rainy days is a small amount of off-peak electricity used for supplementary heating. It is an unparalleled alternative to traditional solar water heaters, balcony wall-mounted solar water heating systems, air source water heaters, and electric water heaters.

[0003] Traditional residential water heaters are typically installed by developers during the construction phase. When residents renovate, the entire unit must be removed for tiling, ceiling installation, or cabinet finishing. The unit is then reinstalled after the tile setter finishes the walls. This process has multiple drawbacks, including high labor costs, the presence of through holes left after the expansion bolts are removed that damage waterproofing and insulation, and the risk of leakage if not properly sealed. During reinstallation, the original holes are repeatedly stressed, leading to loosening and tilting over time, creating safety hazards. The industry lacks water heaters that can be installed simultaneously with the renovation without repeated disassembly and reinstallation, making the "install first, then disassemble, then reinstall" approach a common pain point.

[0004] Therefore, a wall-mounted photovoltaic water heater was proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a wall-mounted photovoltaic water heater.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a wall-mounted photovoltaic water heater, comprising a water heater and a photovoltaic panel disposed on the outside of a balcony, wherein the photovoltaic panel provides DC power to the water heater, and a mounting frame for mounting on a wall is provided on the rear side of the water heater. Fixing blocks are fixedly connected to the upper and lower ends of the inner side of the mounting frame. A pair of sliding blocks are longitudinally slidably connected to the inner side of the mounting frame relative to the positions of the fixing blocks. A rear plate is bolted to the rear side of the water heater. A pair of fixing plates are fixedly connected to the upper and lower ends of the rear side of the rear plate. Sliding plates are longitudinally slidably connected to the rear side of the rear plate relative to the positions of the sliding blocks on both sides. An upper rotating shaft is rotatably connected to both sides of the fixing blocks, and a lower rotating shaft is rotatably connected to both sides of the sliding blocks. An upper rod is rotatably connected between the side end of the upper rotating shaft and the side wall of the sliding plate, and a lower rod is rotatably connected between the side end of the lower rotating shaft and the side wall of the fixing plate. The intersection points of the upper and lower rods are rotatably connected. A fixing frame is fixedly connected through the middle of the side wall of the rear plate. An adjusting rod is longitudinally slidably connected to the inner side of the fixing frame. A limiting mechanism for restricting the position of the rear plate is also provided.

[0007] In the above technical solution, the limiting mechanism further includes a stud, which is threadedly connected to the bottom end of the fixed frame and rotatably connected to the bottom end of the adjusting rod. Several side grooves are provided on both sides of the outer wall of the rear plate, and a limiting plate is laterally slidably connected to the inner side of each of the side grooves. A limiting groove is provided on the inner side of the mounting frame relative to the position next to the limiting plate. A side rod is fixedly connected to the side of the limiting plate near the adjusting rod, and the side rod passes through the inner side of the fixed frame. An adjusting groove is provided on the side wall of the adjusting rod relative to the position next to the side rod, and the top of the inner side of each adjusting groove is inclined.

[0008] In the above technical solution, a pair of limiting springs are fixedly connected between the side wall of the limiting plate and the inner side of the side groove, and the top of the side rod near the adjusting rod is set as a smooth arc surface.

[0009] In the above technical solution, the limiting groove is inclined on the side closer to the rear plate, and the limiting plate is inclined on the side away from the mounting frame.

[0010] In the above technical solution, further, a docking frame is fixedly connected to the bottom end of the mounting frame near the water heater. Four connecting pipes are fixedly connected through the bottom end of the docking frame. A notch is opened at the bottom end of the water heater. Four bottom pipes are fixedly connected to the notch. The bottom pipes are respectively connected to the cold water inlet, hot water outlet, hot water return interface and overflow port in the water heater. A base plate is longitudinally slidably connected to the inside of the notch. Corrugated pipes are fixedly connected to the bottom ends of the bottom pipes. Four conical sealing rings are fixedly connected through the bottom ends of the base plate. The bottom ends of the corrugated pipes are fixedly connected to the top of the four conical sealing rings. A connecting plate is fixedly connected between the side wall of the base plate and the side wall of the adjusting rod.

[0011] In the above technical solution, the bellows and the conical sealing ring are both made of high temperature resistant material, the bottom of the mounting frame is provided with a bottom opening, and the bottom of the outer wall of the connecting pipe is provided with a threaded groove.

[0012] In the above technical solution, furthermore, both sides of the outer wall of the docking frame are threaded with lower bolts, both ends of the inner side of the docking frame are laterally slidably connected with L-shaped plates, and the bottom end of the base plate is fixedly connected with a pair of lower blocks, and the bottom end of the lower blocks is fixedly connected with a right-angled block with an inclined surface.

[0013] In the above technical solution, the bottom ends of the L-shaped plates on the side closest to each other are inclined, the inclined surfaces of the right-angle blocks are set on the side furthest from each other, and the sidewall of the docking frame has an upper opening.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This invention, through the design of the mounting frame, back plate, and limiting mechanism, allows developers to simply fix the mounting frame to the wall using expansion bolts. Later, during home renovations, the water heater can be pulled out of the mounting frame, and the X-shaped hinge consisting of the upper and lower rods can be extended, facilitating tiling operations by workers. The tiling area can be placed against the side of the mounting frame, saving on wall tile costs. Finally, after renovations are complete, the water heater can be pushed back and locked by the limiting mechanism. This not only saves the cost of hiring a professional for disassembly and reassembly but also avoids repeated stress that could cause damage, greatly improving the device's convenience.

[0016] 2. By setting up structures such as the docking frame and the base plate, this invention can separate the bottom pipe of the water heater from the connecting pipe while releasing the lock between the water heater and the mounting frame. Thus, when the user moves the water heater out during the renovation stage, there is no need to remove the water pipe from the connecting pipe. Furthermore, during resetting, the docking can be quickly and sealed, which not only avoids the risk of incorrect installation by the user, but also saves a lot of disassembly and assembly time, further improving the convenience of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the front of the photovoltaic water heater of the present invention;

[0018] Figure 2 This is a bottom-view perspective view of the water heater and mounting frame of the present invention.

[0019] Figure 3 Appendix of the present invention Figure 2 A magnified view of the structure at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the overall appearance structure of the rear plate, fixing block and sliding block of the present invention;

[0021] Figure 5 This is a partial bottom-view three-dimensional structural diagram of the water heater of the present invention;

[0022] Figure 6 This is a schematic diagram of the overall appearance structure of the mounting frame and rear plate of the present invention;

[0023] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the mounting frame and docking frame of the present invention;

[0024] Figure 8 This is a top view of a partially sectional three-dimensional structure of the rear plate of the present invention;

[0025] Figure 9 This is a partial three-dimensional structural diagram of the adjusting rod and base plate of the present invention.

[0026] In the diagram: 1. Water heater; 2. Photovoltaic panel; 3. Mounting frame; 4. Fixing block; 5. Sliding block; 6. Rear plate; 7. Fixing plate; 8. Sliding plate; 9. Upper rotating shaft; 10. Lower rotating shaft; 11. Upper rod; 12. Lower rod; 13. Stud; 14. Fixing frame; 15. Adjusting rod; 16. Side groove; 17. Limiting plate; 18. Limiting groove; 19. Side rod; 20. Adjusting groove; 21. Limiting spring; 22. Connecting frame; 23. Connecting pipe; 24. Notch; 25. Bottom pipe; 26. Base plate; 27. Corrugated pipe; 28. Conical sealing ring; 29. ​​Connecting plate; 30. Lower opening; 31. Lower bolt; 32. L-shaped plate; 33. Lower block; 34. Right-angle block; 35. Upper opening. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0029] In practical use, it has been found that traditional residential water heaters are generally installed by developers during the construction phase. When residents renovate, the entire unit must be removed for tiling, ceiling installation, or cabinet finishing. The unit is then reinstalled after the tile setter finishes the wall. This process has multiple drawbacks, including high labor costs, the through holes left after the expansion bolts are removed which damage waterproofing and insulation, and leaks if not properly sealed. During reinstallation, the original holes are repeatedly stressed, causing them to loosen and tilt over time, creating safety hazards. The industry lacks water heaters that can be installed and reinstalled simultaneously with the renovation without repeated disassembly and reassembly. The common problem is that the system is designed to solve these issues. The following structure was invented to address these problems.

[0030] like Figures 1-9 The wall-mounted photovoltaic water heater shown includes a water heater 1 and a photovoltaic panel 2 installed on the outside of a balcony. The photovoltaic panel 2 provides DC power to the water heater 1. The water heater 1 consists of an enamel inner tank assembly, an outer shell, upper and lower end covers, a DC electric heater, an AC electric heater, an AC electric heating controller, a DC electric heating thermostat, and an insulation layer. The photovoltaic DC power preferentially drives the heating element, and the 220V mains power automatically supplements when sunlight is insufficient. It features independent control of the dual systems, can operate normally even without mains power, has pressurized top-mounted water supply, high water pressure, no pipe freezing in winter, requires no roof installation, and combines energy saving with comfort. The photovoltaic panel 2 supplies power to the DC electric heater via a power line. The constant temperature and high temperature protection controller monitors the water temperature in real time. When there is sufficient sunlight, the water can be heated to the set temperature using only solar energy. When there is insufficient sunlight or during peak water usage, the AC electric heater automatically switches on. The electronic temperature control and high temperature protection enable scheduled or constant temperature heating. The DC and AC control circuits are completely independent. Even without being plugged into the mains power, the DC side can still heat the water normally and display the water temperature. The whole machine operates under pressure, with high water pressure from the top water outlet. No roof installation is required, and there is no risk of pipe freezing in winter. It achieves a balance between green energy saving and comfortable water use.

[0031] The water heater 1 has a mounting frame 3 for wall mounting on the rear side. The upper and lower ends of the mounting frame 3 are fixedly connected to the fixing blocks 4. A pair of sliding blocks 5 are longitudinally slidably connected to the inner side of the mounting frame 3 relative to the fixing blocks 4. The rear plate 6 is bolted to the rear side of the water heater 1. A pair of fixing plates 7 are fixedly connected to the upper and lower ends of the rear side of the rear plate 6. Sliding plates 8 are longitudinally slidably connected to the rear side of the rear plate 6 relative to the sides of the sliding blocks 5. The upper rotating shaft 9 is rotatably connected to both sides of the fixing blocks 4. The lower rotating shaft 10 is rotatably connected to both sides of the sliding blocks 5. The upper rod 11 is rotatably connected to the side wall of the sliding plate 8 at the side end of the upper rotating shaft 9. The lower rod 12 is rotatably connected to the side wall of the fixing plate 7 at the side end of the lower rotating shaft 10. The intersection of the upper rod 11 and the lower rod 12 is rotatably connected. A fixing frame 14 is fixedly connected through the middle of the side wall of the rear plate 6. An adjusting rod 15 is longitudinally slidably connected to the inner side of the fixing frame 14. A limiting mechanism for limiting the position of the rear plate 6 is also provided.

[0032] The limiting mechanism includes a stud 13, which is threaded through and connected to the bottom end of the fixed frame 14. The stud 13 is rotatably connected to the bottom end of the adjusting rod 15. Several side grooves 16 are provided on both sides of the outer wall of the rear plate 6. A limiting plate 17 is slidably connected to the inner side of the several side grooves 16. A limiting groove 18 is provided on the inner side of the mounting frame 3 relative to the side of the limiting plate 17. A side rod 19 is fixedly connected to the side of the limiting plate 17 near the adjusting rod 15. The side rod 19 is provided through the inner side of the fixed frame 14. An adjusting groove 20 is provided on the side wall of the adjusting rod 15 relative to the side of the side rod 19. The top of the inner side of the adjusting groove 20 is inclined.

[0033] A pair of limiting springs 21 are fixedly connected between the side wall of the limiting plate 17 and the inner side of the side groove 16. The limiting springs 21 facilitate the upward movement of the adjusting rod 15. When the pressure on the side rod 19 is released, the limiting plate 17 and the side rod 19 are quickly pulled to reset, ensuring that the limiting plate 17 can be quickly pulled out of the limiting groove 18. The top of the side rod 19 near the adjusting rod 15 is set as a smooth arc surface, which makes it easier for the inclined surface of the adjusting groove 20 to press the side rod 19 to move more smoothly.

[0034] The limiting groove 18 is inclined on the side closer to the rear plate 6, and the limiting plate 17 is inclined on the side away from the mounting frame 3. With the setting of the two inclined surfaces, when the limiting plate 17 is inserted into the limiting groove 18, the inclined surface of the limiting plate 17 will press against the inclined surface of the limiting groove 18. Since the rear plate 6 can only slide back and forth inside the mounting frame 3 when the limiting plate 17 is pressed, the deeper the limiting plate 17 is inserted, the tighter the position of the rear plate 6 in the mounting frame 3 becomes.

[0035] The bottom of the mounting frame 3 has a through opening 30, which allows it to be rotated to the stud 13 for adjustment. The bottom of the outer wall of the connecting pipe 23 has a threaded groove to facilitate the connection between the connecting pipe 23 and the external water pipe.

[0036] When installing water heater 1, first install photovoltaic panel 2 outside the balcony, then drill expansion bolt holes in the indoor wall, and then install mounting frame 3 on the wall with expansion bolts (it should be noted that during installation, the back plate 6 on water heater 1 and mounting frame 3 must be in an infinite position to ensure proper installation of expansion bolts). After installation, the back plate 6 on water heater 1 can be pushed into mounting frame 3, and the stud 13 can be moved to the lower opening 30. Then, use an electric gun with a sleeve to rotate stud 13 and move it downwards. At the same time, pull the adjusting rod 15 to move it down inside the fixed frame 14.

[0037] During this process, the downward movement of the adjusting rod 15 will cause the adjusting groove 20 to move downward as well, thereby gradually moving the inclined surface of the adjusting groove 20 to the side rod 19, thus gradually squeezing the arc surface of the side rod 19. Since the side rod 19 and the limiting plate 17 can only slide laterally inside the side groove 16, when the inclined surface of the adjusting groove 20 squeezes the side rod 19, it will squeeze the side rod 19 to slide laterally, so that the limiting plate 17 is inserted into the corresponding limiting groove 18. At the same time, the limiting spring 21 is gradually stretched. As the limiting plate 17 is gradually inserted, the inclined surface of the limiting plate 17 will squeeze the inclined surface of the limiting groove 18, thereby pulling the rear plate 6 tightly locked in the mounting frame 3, thus fixing the position between the mounting frame 3 and the water heater 1. Then, the cold water pipe, hot water pipe, hot water return pipe and overflow pipe can be connected to the water heater 1.

[0038] However, when users need to remove the water heater 1 during renovations to cover the obstructed area, an electric gun can be used to drive the stud 13 to rotate in the opposite direction, causing the stud 13 to spiral upwards. Simultaneously, this pushes the adjusting rod 15 upwards, gradually moving the inclined surface of the adjusting groove 20 away from the side rod 19, thus relieving pressure on the side rod 19. Subsequently, the limiting spring 21 pulls the limiting plate 17 and the side rod 19 back to their original positions, pulling the limiting plate 17 out of the limiting groove 18, thus releasing the connection between the rear plate 6 and the mounting plate. Once the frames 3 are locked together, the water heater 1 can be pulled out, and the rear plate 6 will move at the same time. During this process, the movement of the rear plate 6 will drive the fixed plate 7 and the sliding plate 8 to move, thereby pulling the upper rod 11 and the lower rod 12 to rotate around the hinge. This will cause the X-shaped hinge formed by the upper rod 11 and the lower rod 12 to extend, and drive the sliding plate 8 and the sliding block 5 to slide closer to the fixed block 4 and the fixed plate 7, thereby pulling out the water heater 1. The part of the water heater 1 that is covered can then be decorated.

[0039] During the renovation phase, it is important to note that the thickness of the tiles should not exceed the rotation position of the stud 13, otherwise it will affect the locking and fixing of the water heater 1. After the renovation is completed, the above operation can be repeated in reverse to reinstall it.

[0040] In summary, with the above structural design, the developer only needs to fix the mounting frame 3 to the wall with expansion bolts. Then, during the user's renovation, the water heater 1 can be pulled out from the mounting frame 3, and the X-shaped hinge composed of the upper rod 11 and the lower rod 12 can be pulled out, which facilitates the workers to carry out tiling and other operations. The tiling position can be attached to the side of the mounting frame 3, saving the cost of wall tiles. Finally, after the renovation is completed, the water heater 1 can be pushed back and locked by the limiting mechanism. This not only saves the cost of hiring a professional to disassemble and install it, but also avoids repeated stress that could cause damage, greatly improving the convenience of the device.

[0041] Based on the above embodiments, it was found during use that although the above structure facilitates the pulling out and resetting of the water heater 1, in actual use, there is a water pipe connected to the bottom of the water heater 1. In order to ensure that the water heater 1 can be pulled out normally, the water pipe needs to be removed before it can be pulled out. This is not only time-consuming and laborious, but also easy for users to confuse during installation, resulting in incorrect installation, which affects the normal use of the water heater 1. To solve the above problems, further improvements have been made to the above structure.

[0042] A docking frame 22 is fixedly connected to the bottom end of the mounting frame 3 near the water heater 1. Four connecting pipes 23 are fixedly connected through the bottom end of the docking frame 22. A notch 24 is opened at the bottom end of the water heater 1. Four bottom pipes 25 are fixedly connected at the notch 24. The bottom pipes 25 are respectively connected to the cold water inlet, hot water outlet, hot water return interface and overflow port in the water heater 1. A base plate 26 is longitudinally slidably connected to the inside of the notch 24. Corrugated pipes 27 are fixedly connected to the bottom end of each bottom pipe 25. Four conical sealing rings 28 are fixedly connected through the bottom end of each base plate 26. The bottom end of each corrugated pipe 27 is fixedly connected to the top of the four conical sealing rings 28. A connecting plate 29 is fixedly connected between the side wall of the base plate 26 and the side wall of the adjusting rod 15.

[0043] Both the bellows 27 and the conical sealing ring 28 are made of high-temperature resistant material to ensure that the bellows 27 and the conical sealing ring 28 are not affected by the hot water in the water heater 1. It should be noted that the bellows 27 and the conical sealing ring 28 are made of different materials, but both are made of high-temperature resistant material.

[0044] Both sides of the outer wall of the docking frame 22 are threaded with lower bolts 31. Both ends of the inner side of the docking frame 22 are laterally slidably connected with L-shaped plates 32. The bottom of the base plate 26 is fixedly connected with a pair of lower blocks 33. The bottom of the lower blocks 33 is fixedly connected with right-angle blocks 34 with inclined surfaces. By setting the lower bolts 31, L-shaped plates 32, lower blocks 33 and right-angle blocks 34, the positions of the two sides of the base plate 26 on the docking frame 22 can be further locked to ensure the sealing connection between the two conical sealing rings 28 and the connecting pipe 23.

[0045] The bottom ends of the L-shaped plates 32 on the side closest to each other are inclined, and the inclined surfaces of the right-angle blocks 34 are set on the side furthest from each other. The side wall of the docking frame 22 has an upper opening 35. The upper opening 35 facilitates the downward movement of the connecting plate 29, thereby avoiding obstruction of the sealing connection between the conical sealing ring 28 and the connecting pipe 23.

[0046] During the installation of water heater 1, the cold water pipe, hot water pipe, hot water return pipe, and overflow pipe are sealed and connected to the connecting pipe 23 through threaded grooves. After the connection is completed, when it is necessary to pull out water heater 1 during renovation, the adjusting rod 15 is driven to move upward by rotating the stud 13. This will drive the base plate 26 to move upward through the connecting plate 29, thereby pulling the conical sealing ring 28 out of the connecting pipe 23, releasing the seal between the two. Then the conical sealing ring 28 moves out of the docking frame 22. At this time, the squeezing of the opposite rod 19 is also released. Then, when the water heater 1 is pulled out, (it should be noted that at this time, the bottom end of the stud 13 has been completely rotated to the inside of the fixing frame 14. Therefore, when the water heater 1 is pulled out, the docking frame 22 will not obstruct the movement of the stud 13, thus affecting the normal pulling out of the water heater 1).

[0047] Finally, during the repositioning process after the renovation is completed, the stud 13 is rotated in the reverse direction to drive the adjusting rod 15 downwards. Simultaneously, the connecting plate 29 drives the base plate 26 and multiple conical sealing rings 28 downwards, inserting them into the inner side of the corresponding connecting pipe 23. This also stretches the bellows 27, thus achieving a sealed connection between the water heater 1 and the connecting pipe 23. After the stud 13 has rotated, an electric gun with a sleeve can be used to rotate the lower bolts 31 on both sides in sequence, moving them spirally towards the inner side of the docking frame 22. Simultaneously, this pushes the L-shaped plate 32 to slide towards the inner side of the docking frame 22. Before this, when the stud 13 drives the base plate 26 to move down, it will drive the right-angle block 34 to move next to the L-shaped plate 32. However, since the connecting plate 29 is in the middle position and the length of the two sides of the base plate 26 is large, the edge will be warped. As a result, when the inclined surface of the L-shaped plate 32 moves to the inclined surface of the right-angle block 34, it will gradually squeeze the right-angle block 34 to move down, and then squeeze the two sides of the base plate 26 to move down, so that the conical sealing rings 28 on both sides are tightly inserted into the corresponding connecting pipes 23, thus achieving a sealed connection between the conical sealing rings 28 and the connecting pipes 23.

[0048] In summary, the above structural design allows for the separation of the bottom pipe 25 and the connecting pipe 23 of the water heater 1 from the locking between the water heater 1 and the mounting frame 3. This means that when the user removes the water heater 1 during the renovation phase, it is not necessary to disconnect the water pipe from the connecting pipe 23. Furthermore, the water heater 1 can be quickly and accurately reconnected during resetting, which not only avoids the risk of incorrect installation by the user but also saves a significant amount of disassembly and assembly time, further improving the convenience of the device.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0050] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A wall-mounted photovoltaic water heater, comprising a water heater (1) and a photovoltaic panel (2) disposed on the outside of a balcony, wherein the photovoltaic panel (2) provides DC power to the water heater (1), characterized in that: The water heater (1) has a mounting frame (3) for wall mounting on its rear side. Fixing blocks (4) are fixedly connected to the upper and lower ends of the inner side of the mounting frame (3). A pair of sliding blocks (5) are longitudinally slidably connected to the inner side of the mounting frame (3) relative to the fixing blocks (4). A rear plate (6) is bolted to the rear side of the water heater (1). A pair of fixing plates (7) are fixedly connected to the upper and lower ends of the rear side of the rear plate (6). Sliding plates (8) are longitudinally slidably connected to the rear side of the rear plate (6) relative to both sides of the sliding blocks (5). The fixing blocks (4) are rotatably connected to both sides. The upper rotating shaft (9) is rotatably connected to the lower rotating shaft (10) on both sides of the sliding block (5). The upper rotating shaft (9) is rotatably connected to the side wall of the sliding plate (8) with an upper rod (11). The lower rotating shaft (10) is rotatably connected to the side wall of the fixed plate (7) with a lower rod (12). The intersection of the upper rod (11) and the lower rod (12) is rotatably connected. The middle of the side wall of the rear plate (6) is fixedly connected to a fixed frame (14). The inner side of the fixed frame (14) is longitudinally slidably connected to an adjusting rod (15). A limiting mechanism for limiting the position of the rear plate (6) is also provided. The limiting mechanism includes a stud (13), which is threaded through and connected to the bottom end of the fixed frame (14). The stud (13) is rotatably connected to the bottom end of the adjusting rod (15). Several side grooves (16) are provided on both sides of the outer wall of the rear plate (6). A limiting plate (17) is slidably connected to the inner side of the several side grooves (16). A limiting groove (18) is provided on the inner side of the mounting frame (3) relative to the side of the limiting plate (17). A side rod (19) is fixedly connected to the side of the limiting plate (17) near the adjusting rod (15). The side rod (19) is provided through the inner side of the fixed frame (14). An adjusting groove (20) is provided on the side wall of the adjusting rod (15) relative to the side of the side rod (19). The top of the inner side of the adjusting groove (20) is inclined. The mounting frame (3) is fixedly connected to a docking frame (22) at the bottom end near the water heater (1). Four connecting pipes (23) are fixedly connected through the bottom end of the docking frame (22). A notch (24) is opened at the bottom end of the water heater (1). Four bottom pipes (25) are fixedly connected at the notch (24). The bottom pipes (25) are respectively connected to the cold water inlet, hot water outlet, hot water return interface and overflow port in the water heater (1). A base plate (26) is longitudinally slidably connected inside the notch (24). A corrugated pipe (27) is fixedly connected to the bottom end of each bottom pipe (25). Four conical sealing rings (28) are fixedly connected through the bottom end of each base plate (26). The bottom end of each corrugated pipe (27) is fixedly connected to the top of each of the four conical sealing rings (28). A connecting plate (29) is fixedly connected between the side wall of the base plate (26) and the side wall of the adjusting rod (15).

2. A wall-mounted photovoltaic water heater according to claim 1, characterized in that: A pair of limiting springs (21) are fixedly connected between the side wall of the limiting plate (17) and the inner side of the side groove (16), and the top of the side rod (19) near the adjusting rod (15) is set as a smooth arc surface.

3. A wall-mounted photovoltaic water heater according to claim 1, characterized in that: The limiting groove (18) is inclined on the side closer to the rear plate (6), and the limiting plate (17) is inclined on the side away from the mounting frame (3).

4. A wall-mounted photovoltaic water heater according to claim 1, characterized in that: The corrugated pipe (27) and the conical sealing ring (28) are both made of high temperature resistant material. The bottom end of the mounting frame (3) is provided with a lower opening (30), and the bottom end of the outer wall of the connecting pipe (23) is provided with a threaded groove.

5. A wall-mounted photovoltaic water heater according to claim 1, characterized in that: Both sides of the outer wall of the docking frame (22) are threaded with lower bolts (31), and both ends of the inner side of the docking frame (22) are slidably connected with L-shaped plates (32). The bottom end of the base plate (26) is fixedly connected with a pair of lower blocks (33), and the bottom end of the lower blocks (33) is fixedly connected with a right-angled block (34) with an inclined surface.

6. A wall-mounted photovoltaic water heater according to claim 5, characterized in that: The bottom ends of the L-shaped plates (32) on the side closest to each other are inclined, the inclined surfaces of the right-angled blocks (34) are set on the side furthest from each other, and the side wall of the docking frame (22) has an upper opening (35).

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