Anti-overheating device of solar water heater and anti-overheating solar water heater

Abstract

The utility model discloses an anti-overheating device of a solar water heater. The anti-overheating device comprises a plurality of arc-shaped anti-dazzling screens, gear rings and racks, wherein the arc-shaped anti-dazzling screens are rotationally arranged outside heat collecting pipes; the gear rings are arranged on the outer walls of the anti-dazzling screens; the rack can reciprocate in the direction perpendicular to the axis of the heat collecting pipe. The solar water heater has the advantages that when sunlight is sufficient and the water temperature in the water tank of the solar water heater exceeds a certain temperature, the rack is controlled to move, the rack drives the gear rings to rotate and drives the anti-dazzling screen to rotate until the anti-dazzling screen rotates to the position above the heat collecting pipe, and the water temperature is prevented from continuing to rise.

Description

Technical Field

[0001] This utility model relates to the field of solar water heater technology, and in particular to a solar water heater overheat protection device and an overheat protection solar water heater. Background Technology

[0002] In real life, when there is ample sunshine, solar water heating systems can overheat due to the accumulation of heat. This can affect the lifespan of the water storage tank, circulation pipes, hot water pipes, and bathroom fixtures. It can even lead to boiling water spraying out and causing injury. Therefore, it is necessary to develop an overheat protection device for solar water heaters and an overheat-resistant solar water heater. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an overheat protection device and an overheat protection solar water heater. When it is necessary to prevent the water temperature from continuing to rise, the shading plate can be controlled to rotate to the bottom of the heat collection tube to prevent overheating.

[0004] To solve the above-mentioned technical problems, this utility model provides a solar water heater overheat protection device, including several arc-shaped light-shielding plates rotatably installed outside the heat collection tube, toothed rings installed on the outer wall of the light-shielding plates, and a rack installed above the mounting frame and meshing with each of the toothed rings; the rack can reciprocate along the direction perpendicular to the axis of the heat collection tube.

[0005] Furthermore, it also includes several brackets installed on the mounting frame; the brackets are equipped with support seats; both ends of the light-shielding sheet are rotatably mounted on the support seats via bearings.

[0006] Furthermore, it also includes a drive assembly for driving the rack to move.

[0007] Furthermore, the drive assembly includes support frames mounted on the left and right sides of the upper surface of the mounting bracket, a lead screw rotatably mounted between the two support frames, and a slide rod fixedly mounted between the two support frames; the rack has nuts threadedly connected to the lead screw and sliders slidably connected to the slide rod on both sides respectively.

[0008] Furthermore, a crank handle is rotatably mounted on one side of the support frame; one end of the crank handle is connected to one end of the lead screw; limit holes are provided on the crank handle and on both sides of the support frame located on the lead screw; after the bolt passes through the limit holes on the crank handle and the support frame, the position of the crank handle is locked using a nut.

[0009] In another further embodiment, a brake motor is mounted on one side of the support frame; the output shaft of the brake motor is connected to the lead screw.

[0010] Furthermore, there are two sliders; limit switches are installed on the inner walls of both support frames.

[0011] Furthermore, the inner layer of the light-shielding sheet is provided with a reflective layer.

[0012] This utility model also provides an overheat-proof solar water heater, which is equipped with the above-mentioned overheat-proof device for solar water heaters.

[0013] Furthermore, it also includes a water tank; a temperature sensor is installed inside the water tank.

[0014] The beneficial effects of this utility model are:

[0015] Under normal conditions, the shading plate is located below the collector tube. When there is sufficient sunlight and the water temperature in the tank exceeds a certain temperature, the rack is controlled to move, which drives several gear rings to rotate, causing the shading plate to rotate until it rotates above the collector tube, preventing the water temperature from rising further. Attached Figure Description

[0016] Figure 1 This is a side view of the overall structure of Example 3;

[0017] Figure 2 This is a partial top view of the structure of Example 3;

[0018] Figure 3 for Figure 2 Top view of the middle section of the structure;

[0019] Figure 4 for Figure 3 Enlarged view of a local structure in the middle;

[0020] Figure 5 This is a cross-sectional view of a partial structure in Example 3 under both light-shielding and light-unshielding conditions;

[0021] Figure 6 This is a partial structural side view of Example 2.

[0022] In the diagram, 1-water tank, 2-mounting bracket, 3-sunshade plate, 4-bracket, 5-support base, 6-heat collector tube, 7-gear ring, 8-gear rack, 9-support frame, 10-lead screw, 11-slide bar, 12-nut, 13-slider, 14-brake motor, 15-limit switch, 16-crank handle, 17-limit hole. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1

[0025] An overheat protection device for a solar water heater includes several arc-shaped light-shielding plates 3 rotatably mounted on the outside of a heat collector tube 6, toothed rings 7 mounted on the outer wall of the light-shielding plates 3, and a rack 8 mounted above a mounting frame 2 and meshing with each toothed ring 7; the rack 8 can reciprocate along a direction perpendicular to the axis of the heat collector tube 6.

[0026] In the above-mentioned solar water heater overheat protection device and overheat protection solar water heater, under normal conditions, the shading plate 3 is located below the heat collector tube 6. When there is sufficient sunlight and the water temperature in the water tank 1 exceeds a certain temperature, the control rack 8 moves, and the rack 8 drives several gear rings 7 to rotate, which in turn drives the shading plate 3 to rotate until the shading plate 3 rotates above the heat collector tube 6, preventing the water temperature from continuing to rise.

[0027] Specifically, in order to achieve stable installation of the light-shielding sheet 3, several brackets 4 are also installed on the mounting frame 2; support seats 5 are installed on the brackets 4; both ends of the light-shielding sheet 3 are rotatably installed on the support seats 5 through bearings.

[0028] Specifically, it also includes a drive assembly for moving the rack 8.

[0029] Specifically, the drive assembly includes support frames 9 mounted on the left and right sides of the upper surface of the mounting bracket 2, a lead screw 10 rotatably mounted between the two support frames 9, and a slide rod 11 fixedly mounted between the two support frames 9; a nut 12 threadedly connected to the lead screw 10 and a slider 13 slidably connected to the slide rod 11 are respectively fixed to both sides of the rack 8. Controlling the rotation of the lead screw 10 can drive the nut 12 and the rack 8 to move.

[0030] Specifically, a brake motor 14 is mounted on one side support frame 9; the output shaft of the brake motor 14 is connected to the lead screw 10. The brake motor 14 cannot rotate when power is off. Compared to manual rotation, driving the lead screw 10 with the brake motor 14 reduces labor intensity.

[0031] Specifically, there are two sliders 13; limit switches 15 are installed on the inner walls of both support frames 9. The installation positions of the two sliders 13 on the rack 8 need to be determined according to the travel distance of the rack 8. The travel distance of the rack 8 refers to the distance that the rack 8 moves when driving the light-shielding plate 3 to rotate from directly below the heat collection tube 6 to directly above it. Figure 3As shown, in this state, the light-shielding plate 3 is directly below the heat collection tube 6. At this time, the distance between the right slider 13 and the right limit switch 15 is exactly equal to the travel distance of the rack 8; while the left slider 13 is in contact with the left limit switch 15. When light shading is needed, the brake motor 14 is turned on, and the slider 13, along with the rack 8, moves to the right. When the right slider 13 moves to contact the right limit switch 15, the brake motor 14 is turned off. When light shading is no longer needed, the brake motor 14 reverses, and the slider 13, along with the rack 8, moves to the left. When the left slider 13 moves to contact the left limit switch 15, the brake motor 14 is turned off.

[0032] Specifically, the inner layer of the light-shielding sheet 3 is equipped with a reflective layer. The reflective layer can increase the light-receiving area of ​​the heat collection tube 6 and make full use of solar energy.

[0033] Example 2

[0034] An overheat protection device for solar water heaters, such as Figure 6 As shown, the brake motor 14 and limit switch 15 are reduced, and the crank handle 16, limit hole 17 and bolt and nut for locking position are added. The rest of the structure is the same as in embodiment 1.

[0035] Specifically, a crank handle 16 is rotatably mounted on one side of the support frame 9; one end of the crank handle 16 is connected to one end of the lead screw 10; limit holes 17 are provided on the crank handle 16 and on both sides of the support frame 9 located on the lead screw 10; after the bolt is passed through the limit holes 17 on the crank handle 16 and the support frame 9, the position of the crank handle 16 is locked using a nut. By holding and turning the crank handle 16, the lead screw 10 can be rotated. When it is rotated to the predetermined position, the position of the crank handle 16 is locked using the bolt and nut, thereby preventing the lead screw 10 from rotating, and thus locking the position of the light-shielding plate 3.

[0036] Example 3

[0037] An overheat-resistant solar water heater, such as Figure 1-5 As shown, the aforementioned overheat protection device for the solar water heater is installed. It also includes a water tank 1; a temperature sensor is installed inside the water tank 1. The temperature sensor allows for convenient monitoring of the water temperature inside the water tank 1.

[0038] The working principle of this utility model:

[0039] Under normal conditions, the shading plate 3 is located below the collector tube 6. When there is sufficient sunlight and the water temperature in the water tank 1 exceeds a certain temperature, the rack 8 is moved, driving several gear rings 7 to rotate, which in turn rotates the shading plate 3 until it rotates above the collector tube 6, preventing the water temperature from rising further. The reflective layer on the inner side of the shading plate 3 increases the light-receiving area of ​​the collector tube 6, making full use of solar energy.

[0040] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An overheat protection device for solar water heaters, characterized in that: It includes several arc-shaped light-shielding plates (3) that are rotatably mounted on the outside of the heat collection tube (6), toothed rings (7) mounted on the outer wall of the light-shielding plates (3), and racks (8) mounted above the mounting frame (2) that mesh with each of the toothed rings (7); the racks (8) can reciprocate along the direction perpendicular to the axis of the heat collection tube (6).

2. The solar water heater overheat protection device according to claim 1, characterized in that: It also includes several brackets (4) installed on the mounting frame (2); support seats (5) are installed on the brackets (4); both ends of the light shield (3) are rotatably installed on the support seats (5) through bearings.

3. The solar water heater overheat protection device according to claim 1, characterized in that: It also includes a drive assembly for driving the rack (8) to move.

4. The solar water heater overheat protection device according to claim 3, characterized in that: The drive assembly includes support frames (9) installed on the left and right sides of the upper surface of the mounting frame (2), a lead screw (10) rotatably installed between the two support frames (9), and a slide rod (11) fixedly installed between the two support frames (9); the rack (8) is respectively fixed with a nut (12) threadedly connected to the lead screw (10) and a slider (13) slidably connected to the slide rod (11).

5. The solar water heater overheat protection device according to claim 4, characterized in that: A brake motor (14) is mounted on one side of the support frame (9); the output shaft of the brake motor (14) is connected to the lead screw (10).

6. The solar water heater overheat protection device according to claim 5, characterized in that: The number of sliders (13) is two; the inner walls of the two support frames (9) are each equipped with limit switches (15).

7. The solar water heater overheat protection device according to claim 1, characterized in that: The inner layer of the light-shielding sheet (3) is provided with a reflective layer.

8. The solar water heater overheat protection device according to claim 4, characterized in that: A crank handle (16) is rotatably mounted on one side of the support frame (9); one end of the crank handle (16) is connected to one end of the lead screw (10); limit holes (17) are provided on the crank handle (16) and on both sides of the support frame (9) located on the lead screw (10); after the bolt is passed through the limit holes (17) on the crank handle (16) and the support frame (9), the position of the crank handle (16) is locked with a nut.

9. An overheat-resistant solar water heater, characterized in that: The solar water heater overheat protection device according to any one of claims 1-8 has been installed.

10. The overheat-resistant solar water heater according to claim 9, characterized in that: It also includes a water tank (1); a temperature sensor is installed inside the water tank (1).

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