A solar water heater with antifreeze function and antifreeze method thereof

Abstract

The present invention discloses a solar water heater with antifreeze function and an antifreeze method thereof, comprising a supporting base, a fixing bracket, a vacuum collector and a water storage tank, a heat absorbing base plate, the upper surface of the heat absorbing base plate is pasted with a sunlight reflecting film, and the sunlight reflecting film is placed below the vacuum collector, an angle adjustment mechanism, the angle adjustment mechanism is arranged at the right end of the supporting base, and an antifreeze mechanism, the antifreeze mechanism is arranged between the bearing base plate and the water storage tank, and the antifreeze mechanism allows the water in the water storage tank to circulate. The solar water heater with antifreeze function and the antifreeze method thereof have high absorption efficiency for sunlight, especially can achieve good heat absorption effect when the sunlight is not strong, improve the utilization rate of sunlight, and when the temperature is low, the water stored in the water storage tank can flow, and the water can also be heated to prevent the water heater from being affected by freezing when the temperature is low.

Description

Technical Field

[0001] The invention relates to the technical field related to solar water heaters, and in particular to a solar water heater with an antifreeze function and an antifreeze method thereof. Background Art

[0002] A solar water heater is a heating device that converts sunlight into heat energy and is used to heat water from low temperature to high temperature to meet people's demand for hot water in life and production. Usually, a solar water heater is mainly assembled from a collector, a water storage tank, a bracket and related parts. The water storage tank is used to store water, and the collector is mainly responsible for collecting sunlight and converting it into heat energy, which is the core part of the solar water heater.

[0003] For example, the patent application publication number is CN105333621A, and the application publication date is 2016.02.17. It discloses an antifreeze solar water heater, including a water reservoir, the water reservoir is connected with a water inlet pipe and a water outlet pipe, a No. 1 solenoid valve is installed at the connection between the water outlet pipe and the water reservoir, the end of the water outlet pipe is connected with a bathroom heater or a faucet, a connecting vessel is provided on the water outlet pipe, a No. 2 solenoid valve is provided at the connection between the water inlet pipe and the water reservoir, the end of the water inlet pipe is connected with a tap or a water pump, the water inlet pipe is connected with the drain pipe, and a No. 3 solenoid valve is provided on the drain pipe. Beneficial effects of the present invention: the present invention utilizes a solenoid valve and a connecting vessel to completely drain the water in the water pipe when the solar water heater is not in use, thereby avoiding the situation where the water in the frozen water pipe affects the normal use of solar energy;

[0004] For example, the patent application publication number is CN107477887A, and the application publication date is 2017.12.15. It discloses an antifreeze type solar water heater, including a water tank and a heat collecting plate, the water tank includes an outer shell and an inner tank arranged in the outer shell, the heat collecting plate includes a heat collecting cavity and a superconducting heat pipe, the superconducting heat pipe includes a heat collecting part hidden in the heat collecting cavity and a heat exchange part extending out of the heat collecting cavity, the heat exchange part penetrates the outer shell and is inserted in the inner tank, and the superconducting heat pipe is provided with a superconducting liquid inside; the present invention adopts a structural method of directly connecting the heat collecting plate and the water tank, which is directly connected to form a convection circulation to heat the water in the water tank. Since there is no pipeline connection, the heat loss is very small, and there is no need to add antifreeze liquid regularly, which reduces the cost of later maintenance.

[0005] However, the commonly used solar water heaters have the following shortcomings:

[0006] 1. When the solar water heaters are usually used in low temperature conditions, they are mostly insulated by wrapping insulation cotton outside the pipes, etc., and the actual antifreeze effect is poor, which affects the normal use of the solar water heaters;

[0007] 2. For commonly used solar water heaters, the contact area between sunlight and the collector is only the upper half of the collector, and the contact area between sunlight and the collector is effective, and the actual heat absorption effect needs to be improved;

[0008] 3. Most of the solar water heaters commonly used are fixedly installed, and their angles are fixed and cannot be adjusted. However, the angle of sunlight changes with time, and it is not convenient to adjust the angle of the water heater according to the changes in the angle of sunlight.

[0009] Therefore, we propose a solar water heater with antifreeze function and an antifreeze method thereof, so as to solve the above-mentioned problems. Summary of the invention

[0010] The object of the present invention is to provide a solar water heater with antifreeze function and an antifreeze method thereof, so as to solve the problem proposed in the above-mentioned background technology that when used under low temperature conditions, most of them are only insulated by wrapping insulation cotton outside the pipe, etc., and the actual antifreeze effect is poor, which affects the normal use of the solar water heater. The contact area between sunlight and the collector is only the upper half of the collector, and the contact area with the collector is effective, and the actual heat absorption effect needs to be improved. Most solar water heaters are fixedly installed, and their angles are fixed and cannot be adjusted. The angle of sunlight will change with time, and it is inconvenient to adjust the angle of the water heater according to the change of the angle of sunlight.

[0011] To achieve the above object, the present invention provides the following technical solutions: a solar water heater with antifreeze function and an antifreeze method thereof, comprising a support base, a fixing bracket, a vacuum collector and a water storage tank;

[0012] Wherein, the fixing bracket, vacuum collector and water storage tank are combined into a solar water heater assembly;

[0013] Also includes:

[0014] A heat absorbing bottom plate, wherein a sunlight reflecting film is pasted on the upper surface of the heat absorbing bottom plate, and the sunlight reflecting film is placed below the vacuum collector;

[0015] An angle adjustment mechanism, the angle adjustment mechanism is arranged at the right end of the support base, and the angle adjustment mechanism is arranged at the lower end of the bearing bottom plate, and the angle adjustment mechanism drives the vacuum collector to form a flip structure at the upper end of the support base through the bearing bottom plate;

[0016] An antifreeze mechanism, which is disposed between the bearing bottom plate and the water storage tank, and allows the water in the water storage tank to circulate;

[0017] Among them, the antifreeze mechanism includes a tee pipe connected to the water inlet pipe and the water outlet pipe respectively, a water pump installed at the lower end of the tee pipe, a second electric control valve installed on the water pump pipe, a pump body fixedly installed in the middle of the supporting base plate, a heating box body arranged at the rear end of the pump body, and a heating device installed inside the heating box body.

[0018] Preferably, fixed side panels are fixedly connected to the front and rear sides of the left end of the support base, and the middle part of the fixed side panels is hinged to the fixed bracket, and vacuum collectors are evenly distributed in the middle of the fixed bracket, and the vacuum collectors are connected to the water tank.

[0019] Preferably, the water tank is fixedly connected to the fixed bracket, and the lower end of the water tank is fixedly connected to a bearing bottom plate, the rear end of the water tank is connected to the water inlet pipe, and the front end of the water tank is connected to the water outlet pipe;

[0020] Wherein, a first electric control valve is installed on both the water inlet pipe and the water outlet pipe.

[0021] Preferably, a light sensor is fixedly mounted in the middle of the fixing bracket, and the fixing bracket is connected to the fixing convex rod by a slot, and the fixing convex rod is fixedly connected to the front and rear ends of the heat absorbing bottom plate respectively.

[0022] Preferably, the fixed protrusion is inserted into the lower end of the movable connecting plate, and the movable connecting plate is fitted on the outer side of the fixed bracket, the movable connecting plate and the fixed bracket are limited by a movable connecting bolt, and the movable connecting bolt and the movable connecting plate as well as the movable connecting bolt and the fixed bracket are all threadedly connected.

[0023] Preferably, a mounting side plate is fixedly connected to the right end of the support base, and a servo motor for driving is fixedly mounted on the middle part of the mounting side plate, and a motor protective cover is provided on the outer side cover of the servo motor.

[0024] Preferably, the angle adjustment mechanism includes a lead screw fixedly connected to the output end of the servo motor, a movable push plate for connection, a supporting auxiliary rod with a limiting function, and a connecting bracket for adjustment.

[0025] Preferably, the screw rod is connected to the movable push plate by means of a thread, and a left-right sliding structure is formed between the movable push plate and the supporting auxiliary rod, the supporting auxiliary rod is respectively fixedly connected to the front and rear ends of the mounting side plate, and the upper end of the supporting auxiliary rod is hingedly connected to the connecting bracket;

[0026] Wherein, the connecting bracket is rotatably connected to the bearing base plate.

[0027] Preferably, the water inlet pipe forms a loop with the water outlet pipe through a three-way pipe, a water pumping pipe, a second electric control valve, a pump body and a heating box body, and the heating box body is fixed in the middle of the supporting bottom plate, and the water pumping pipe is connected to the pump body.

[0028] This solution also provides another technical solution, a solar water heater with antifreeze function as claimed in claim 1, characterized in that: the method for using the solar water heater with antifreeze function is:

[0029] Step 1: Reflect sunlight to the lower back of the vacuum collector through the heat-absorbing bottom plate and the solar reflection film, thereby increasing the heat-absorbing area and improving the solar energy absorption efficiency;

[0030] Step 2: Use the light sensor to sense the direction of sunlight, and combine with the angle adjustment mechanism to make the fixed bracket drive the vacuum collector to flip, so that the vacuum collector can better receive light;

[0031] Step 3: By setting up the antifreeze mechanism, a loop is formed between the water inlet pipe, the water outlet pipe, the water pumping pipe and the water storage tank, so that the water in the water storage tank can flow and prevent freezing.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: the solar water heater with antifreeze function and the antifreeze method thereof can reflect sunlight to the back of the lower end of the vacuum collector by setting the heat absorbing bottom plate and the sunlight reflecting film, thereby increasing the area of ​​the vacuum collector receiving sunlight, greatly improving the vacuum collector's absorption efficiency of sunlight, and sensing the direction of sunlight by the light sensor, while combining with the angle adjustment mechanism to drive the fixed bracket and the vacuum collector to flip at the upper end of the supporting base, so that the vacuum collector can better receive sunlight, especially when the sunlight is not strong, it can also achieve a good heat absorption effect, improve the utilization rate of sunlight, and through the setting of the antifreeze mechanism, when the temperature is low, the water stored in the water tank can flow, and the water can also be heated to prevent the water heater from being affected by freezing when the temperature is low;

[0033] 1. A heat absorbing bottom plate and a solar reflective film are provided. The heat absorbing bottom plate is placed at the lower end of the fixed bracket, and the solar reflective film is pasted on the heat absorbing bottom plate. By setting the solar reflective film, the sunlight can be reflected to the lower back of the vacuum collector, thereby increasing the area of ​​the vacuum collector receiving light and improving the efficiency. Combined with the setting of the fixed convex rod, the movable connecting plate and the movable connecting bolt, it is convenient to install the heat absorbing bottom plate to the lower end of the fixed bracket;

[0034] 2. It is equipped with a light sensor and an angle adjustment mechanism. The light sensor senses the direction of sunlight, and combined with the setting of the angle adjustment mechanism, it drives the fixed bracket and the vacuum collector to flip at the upper end of the support base, so that the vacuum collector can face the direction of sunlight to achieve a better heat absorption effect;

[0035] 3. An antifreeze mechanism is provided, which includes a three-way pipe, a water pump, a second electric control valve, a pump body, a heating box body and a heating device. Through the setting of the antifreeze mechanism, the water in the water tank can flow and the water can also be heated to prevent the water heater from being affected by freezing when the temperature is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention in the southwest direction;

[0037] Figure 2 It is a front view structural schematic diagram of the present invention;

[0038] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0039] Figure 4 It is a schematic diagram of the overall structure of the present invention in the southeast direction;

[0040] Figure 5 This is a schematic diagram of the front view structure of the fixing bracket, the heat absorbing bottom plate and the sunlight reflecting film of the present invention;

[0041] Figure 6 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0042] Figure 7 It is a schematic diagram of the explosion structure of the fixed protruding rod, the movable connecting plate and the movable connecting bolt of the present invention;

[0043] Figure 8 It is a bottom view structural schematic diagram of the water storage tank, the bearing bottom plate and the connecting bracket of the present invention;

[0044] Fig. 9 This is a front view structural diagram of the side panels and angle adjustment mechanism installed in the present invention;

[0045] Fig.10 It is a schematic diagram of the front view structure of the water storage tank, the water inlet pipe and the water outlet pipe of the present invention;

[0046] Fig.11 It is a schematic diagram of the exploded structure of the water pumping pipe, heating box and heating device of the present invention.

[0047] In the figure: 1. support base; 2. fixed side plate; 3. fixed bracket; 4. vacuum collector; 5. water storage tank; 6. light sensor; 7. heat absorbing bottom plate; 8. solar light reflecting film; 9. fixed convex rod; 10. movable connecting plate; 11. movable connecting bolt; 12. installation side plate; 13. servo motor; 14. motor protective cover; 15. angle adjustment mechanism; 16. screw rod; 17. movable push plate; 18. support auxiliary rod; 19. connecting bracket; 20. bearing bottom plate; 21. water inlet pipe; 22. water outlet pipe; 23. first electric control valve; 24. antifreeze mechanism; 25. three-way pipe; 26. water pumping pipe; 27. second electric control valve; 28. pump body; 29. ​​heating box body; 30. heating device. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1-11 The present invention provides a technical solution: a solar water heater with antifreeze function and an antifreeze method thereof, comprising a supporting base 1, a fixed side plate 2, a fixed bracket 3, a vacuum collector 4, a water storage tank 5, a light sensor 6, a heat absorbing bottom plate 7, a sunlight reflecting film 8, a fixed convex rod 9, an active connecting plate 10, an active connecting bolt 11, an installation side plate 12, a servo motor 13, a motor protective cover 14, an angle adjustment mechanism 15, a screw rod 16, an active push plate 17, a supporting auxiliary rod 18, a connecting bracket 19, a bearing bottom plate 20, a water inlet pipe 21, a water outlet pipe 22, a first electric control valve 23, an antifreeze mechanism 24, a three-way pipe 25, a water pumping pipe 26, a second electric control valve 27, a pump body 28, a heating box body 29 and a heating device 30.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the support base 1 is fixedly installed in the corresponding position by bolts and studs, and the front and rear sides of the left end of the support base 1 are fixedly connected with fixed side panels 2, the fixed side panels 2 and the fixed bracket 3 are hingedly connected, and the vacuum collector 4 is installed in the middle of the fixed bracket 3, and the vacuum collector 4 is connected to the water tank 5, and the fixed bracket 3 and the water tank 5 are fixedly connected, and the bearing bottom plate 20 is fixed to the lower end of the water tank 5. During installation, the solar reflective film 8 can be pasted on the upper end of the heat absorbing bottom plate 7, and the front and rear ends of the heat absorbing bottom plate 7 are fixedly connected with fixed protruding rods 9, and the fixed protruding rods 9 are connected with the fixed bracket 3 by the card slot, so as to drive the heat absorbing bottom plate 7 and the solar reflective film 8 to be placed on the lower end of the vacuum collector 4;

[0051] Then, the movable connecting plate 10 is sleeved on the outer surface of the fixed convex rod 9, and the fixed convex rod 9 is respectively fitted on the front and rear sides of the fixed bracket 3, and then the movable connecting bolt 11 for limiting is rotated, and the movable connecting bolt 11 and the movable connecting plate 10 and the movable connecting bolt 11 and the fixed bracket 3 are all threadedly connected. Through the setting of the movable connecting bolt 11 and the movable connecting plate 10, it is convenient to limit the position between the fixed convex rod 9 and the fixed bracket 3, so as to facilitate the fixing of the heat absorbing bottom plate 7 to the lower end of the fixed bracket 3. During use, the vacuum collector 4 can reflect sunlight through the solar light reflecting film 8 while receiving light, so that the sunlight is reflected to the back side of the lower end of the vacuum collector 4, thereby increasing the area of ​​the vacuum collector 4 receiving light, thereby greatly improving the actual heat absorption efficiency, especially when the sunlight is not strong, it can better utilize the sunlight;

[0052] Combination Figure 5 , Figure 8 and Fig. 9 As shown, light sensors 6 are fixedly installed on both the front and rear sides of the upper end of the fixed bracket 3. The light sensor 6 senses the illumination direction of sunlight. When the illumination position and angle change is sensed, the signal is transmitted to the central processor. Combined with the setting of the angle adjustment mechanism 15, the angle adjustment mechanism 15 includes a screw rod 16 fixedly connected to the output end of the servo motor 13, a movable push plate 17 for connection, a support auxiliary rod 18 with a limiting function and a connection bracket 19 for adjustment. The servo motor 13 installed in the middle of the installation side plate 12 is started by the central processor control, and the outer cover of the servo motor 13 is provided with a motor protective cover 14;

[0053] The servo motor 13 is started, and the output end of the servo motor 13 is fixedly connected with a screw rod 16. The servo motor 13 drives the screw rod 16 to rotate in the middle of the mounting side plate 12. The screw rod 16 is threadedly connected to the movable push plate 17, thereby driving the movable push plate 17 to slide between the supporting auxiliary rod 18. At this time, the movable push plate 17 rotates between the connecting bracket 19 during the movement, and the connecting bracket 19 rotates at the lower end of the bearing bottom plate 20, thereby causing the bearing bottom plate 20 to drive the fixed bracket 3 and the fixed side plate 2 to rotate. At this time, the fixed bracket 3 drives the vacuum collector 4 to flip at the upper end of the supporting base 1, so that the angle of the vacuum collector 4 can be adjusted accordingly according to the sunlight angle, so that the vacuum collector 4 faces the sunlight direction, and the vacuum collector 4 achieves a better heat absorption effect, especially when the temperature is low and the sunlight is not strong, the actual heat absorption effect is guaranteed to a greater extent, and the sunlight is fully utilized, which greatly improves the actual heat absorption efficiency and has high practicality.

[0054] In addition, if Figure 8 , Fig.10 and Fig.11 As shown, the rear end of the water storage tank 5 is connected to the water inlet pipe 21, and the front end of the water storage tank 5 is connected to the water outlet pipe 22. At the same time, the outer surfaces of the water inlet pipe 21, the water outlet pipe 22, and the water pumping pipe 26 are all wrapped with thermal insulation cotton, and the middle of the water outlet pipe 22 and the water inlet pipe 21 are both installed with a first electric control valve 23. Combined with the setting of the antifreeze mechanism 24, the antifreeze mechanism 24 includes a three-way pipe 25 connected to the water inlet pipe 21 and the water outlet pipe 22, respectively, and a water pumping pipe installed at the lower end of the three-way pipe 25. 26, a second electric control valve 27 installed on the water pumping pipe 26, a pump body 28 fixedly installed in the middle of the bearing bottom plate 20, a heating box 29 arranged at the rear end of the pump body 28 and a heating device 30 installed inside the heating box 29, and the water inlet pipe 21 forms a loop with the water outlet pipe 22 through the three-way pipe 25, the water pumping pipe 26, the second electric control valve 27, the pump body 28 and the heating box 29, and the heating box 29 is fixed in the middle of the bearing bottom plate 20, and the water pumping pipe 26 is connected to the pump body 28;

[0055] When the temperature is low, when the water heater is not in use, the first electric control valve 23 is closed through the control of the central processor, and the second electric control valve 27 is opened at the same time, and the pump body 28 is started. The pump body 28 pumps the water in the water storage tank 5 out, and the water enters the heating box 29 through the outlet pipe 22, the pumping pipe 26 and the second electric control valve 27, and the passing water is heated by the heating device 30 installed in the middle of the heating box 29, so that the water is heated under the condition of low temperature and insufficient sunlight, so as to ensure the normal use of the water temperature. The heated water enters the water storage tank 5 through the pumping pipe 26 and the water inlet pipe 21, so that the water in the water storage tank 5 can flow. The heating device 30 is combined to heat the water, which can effectively prevent the water from being frozen and affecting the use;

[0056] When it is needed, the second electric control valve 27 and the pump body 28 can be closed, and the first electric control valve 23 can be opened to discharge the hot water in the water storage tank 5 through the water outlet pipe 22 for use.

[0057] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar water heater with an antifreeze function, comprising a support base (1), a fixing bracket (3), a vacuum collector (4) and a water storage tank (5); in, The fixed support (3), the vacuum collector (4) and the water storage tank (5) are combined into a solar water heater assembly; It is characterized by further comprising: A heat absorbing bottom plate (7), wherein a sunlight reflecting film (8) is adhered to the upper surface of the heat absorbing bottom plate (7), and the sunlight reflecting film (8) is placed below the vacuum heat collector (4); An angle adjustment mechanism (15), the angle adjustment mechanism (15) being arranged at the right end of the support base (1), and the angle adjustment mechanism (15) being arranged at the lower end of the bearing bottom plate (20), the angle adjustment mechanism (15) driving the vacuum collector (4) via the bearing bottom plate (20) to form a flip structure at the upper end of the support base (1); An antifreeze mechanism (24), wherein the antifreeze mechanism (24) is arranged between the bearing bottom plate (20) and the water storage tank (5), and the antifreeze mechanism (24) enables the water in the water storage tank (5) to circulate; The antifreeze mechanism (24) comprises a three-way pipe (25) connected to the water inlet pipe (21) and the water outlet pipe (22) respectively, a water pumping pipe (26) installed at the lower end of the three-way pipe (25), a second electric control valve (27) installed on the water pumping pipe (26), a pump body (28) fixedly installed in the middle of the bearing base plate (20), a heating box (29) arranged at the rear end of the pump body (28), and a heating device (30) installed inside the heating box (29).

2. A solar water heater with antifreeze function according to claim 1, characterized in that: The front and rear sides of the left end of the support base (1) are fixedly connected to fixed side panels (2), and the middle of the fixed side panels (2) is hingedly connected to the fixed bracket (3), and vacuum collectors (4) are evenly spaced in the middle of the fixed bracket (3), and the vacuum collectors (4) are connected to the water storage tank (5).

3. A solar water heater with antifreeze function according to claim 2, characterized in that: The water storage tank (5) is fixedly connected to the fixed bracket (3), and the lower end of the water storage tank (5) is fixedly connected to a bearing bottom plate (20), the rear end of the water storage tank (5) is connected to a water inlet pipe (21), and the front end of the water storage tank (5) is connected to a water outlet pipe (22); Wherein, a first electric control valve (23) is installed on both the water inlet pipe (21) and the water outlet pipe (22).

4. A solar water heater with antifreeze function according to claim 1, characterized in that: A light sensor (6) is fixedly mounted in the middle of the fixed bracket (3), and the fixed bracket (3) is connected to the fixed protruding rod (9) by a slot, and the fixed protruding rod (9) is fixedly connected to the front and rear ends of the heat absorbing bottom plate (7) respectively.

5. A solar water heater with antifreeze function according to claim 4, characterized in that: The fixed protruding rod (9) is plugged into the lower end of the movable connecting plate (10), and the movable connecting plate (10) is arranged in close contact with the outer side surface of the fixed bracket (3). The movable connecting plate (10) and the fixed bracket (3) are limited by a movable connecting bolt (11), and the movable connecting bolt (11) and the movable connecting plate (10) as well as the movable connecting bolt (11) and the fixed bracket (3) are all threadedly connected.

6. A solar water heater with antifreeze function according to claim 1, characterized in that: The right end of the support base (1) is fixedly connected to a mounting side plate (12), and a servo motor (13) for driving is fixedly mounted in the middle of the mounting side plate (12), and a motor protection cover (14) is provided on the outer side cover of the servo motor (13).

7. A solar water heater with antifreeze function according to claim 1, characterized in that: The angle adjustment mechanism (15) comprises a screw rod (16) fixedly connected to the output end of the servo motor (13), a movable push plate (17) for connection, a supporting auxiliary rod (18) with a limiting function, and a connecting bracket (19) for adjustment.

8. A solar water heater with antifreeze function according to claim 7, characterized in that: The screw rod (16) and the movable push plate (17) are connected by means of a thread, and a left-right sliding structure is formed between the movable push plate (17) and the supporting auxiliary rod (18), the supporting auxiliary rod (18) is respectively fixedly connected to the front and rear ends of the mounting side plate (12), and the upper end of the supporting auxiliary rod (18) is hingedly connected to the connecting bracket (19); The connecting bracket (19) is rotatably connected to the bearing base plate (20).

9. A solar water heater with antifreeze function according to claim 3, characterized in that: The water inlet pipe (21) forms a loop with the water outlet pipe (22) via a three-way pipe (25), a water extraction pipe (26), a second electric control valve (27), a pump body (28) and a heating box (29), and the heating box (29) is fixed to the middle of the bearing bottom plate (20), and the water extraction pipe (26) is connected to the pump body (28).

10. A solar water heater with antifreeze function as claimed in claim 1, characterized in that: The method for using the solar water heater with antifreeze function: Step 1: The sunlight is reflected to the back side of the lower end of the vacuum collector (4) through the heat absorbing bottom plate (7) and the sunlight reflecting film (8), thereby increasing the heat absorbing area and improving the solar energy absorption efficiency; Step 2: The direction of sunlight is sensed by the light sensor (6), and the angle adjustment mechanism (15) is used to enable the fixed bracket (3) to drive the vacuum collector (4) to flip, so that the vacuum collector (4) can better receive light; Step 3: By providing the antifreeze mechanism (24), a loop is formed between the water inlet pipe (21), the water outlet pipe (22), the water pumping pipe (26) and the water storage tank (5), so that the water in the water storage tank (5) can flow and prevent freezing.

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