CN220062177U

CN220062177U - Solar water heater

Info

Publication number: CN220062177U
Application number: CN202321056221.1U
Authority: CN
Inventors: 曾从君
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-11-21
Anticipated expiration: 2033-05-06

Abstract

The utility model discloses a solar water heater, which relates to the technical field of solar water heaters, and comprises a heat-preserving barrel, a vacuum heat-collecting tube obliquely arranged on the heat-preserving barrel, a bracket for supporting the vacuum heat-collecting tube and the heat-preserving barrel, and a pipeline capable of feeding and discharging water from a single pipe, wherein a partition plate is arranged in the heat-preserving barrel to divide the heat-preserving barrel into a solar heating area and an electric heating area; an electric heating rod, a first temperature sensor, a water taking device arranged at the bottom end of the electric heating zone and a first blow-down valve are arranged in the electric heating zone; the bottom end of the partition plate is provided with a first one-way valve leading from the solar heating area to the electric heating area, and the top end of the partition plate is provided with a through hole; the solar water heater is provided with a photovoltaic power generation plate. The utility model uses the photovoltaic power generation plate to provide electric energy for the electric heating rod, and distinguishes the electric heating area from the solar heating area, thereby maximally utilizing hot water.

Description

Solar water heater

Technical Field

The utility model relates to the technical field of solar water heaters, in particular to a solar water heater.

Background

The solar water heater is a heating device for converting solar energy into heat energy, and heats water from low temperature to high temperature so as to meet the requirement of hot water in life and production of people. The solar water heater is divided into a vacuum tube type solar water heater and a flat plate type solar water heater according to the structural form, mainly the vacuum tube type solar water heater occupies 95% of the domestic market share. The vacuum pipe type domestic solar water heater is formed from heat-collecting pipe, water-storing tank and supporting frame, etc. and is used for converting solar energy into heat energy, and the vacuum heat-collecting pipe can utilize the principle of hot water floating up and cold water sinking down to make water produce microcirculation so as to obtain the required hot water.

The existing solar water heater can not heat hot water in continuous overcast and rainy days or snowy days, so that an electric heating rod is added in the solar water heater for auxiliary heating. However, the existing solar water heater uses an electric heating rod for auxiliary heating, the water in the whole heat-preserving barrel is heated, and the heated water can be cooled slowly when not used up, so that hot water and electricity are wasted.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: however, the existing solar water heater uses an electric heating rod for auxiliary heating, the water in the whole heat-preserving barrel is heated, and the heated water can be cooled slowly when not used up, so that hot water and electricity are wasted.

Aiming at the defects of the prior art, the utility model provides a solar water heater, which comprises a heat-preserving barrel, a vacuum heat-collecting tube obliquely arranged on the heat-preserving barrel, a bracket for supporting the vacuum heat-collecting tube and the heat-preserving barrel, and a pipeline capable of feeding and discharging water from a single pipe, wherein a partition plate is arranged in the heat-preserving barrel to divide the heat-preserving barrel into a solar heating area and an electric heating area; an electric heating rod, a first temperature sensor, a water taking device arranged at the bottom end of the electric heating zone and a first blow-down valve are arranged in the electric heating zone; the bottom end of the partition plate is provided with a first one-way valve leading from the solar heating area to the electric heating area, and the top end of the partition plate is provided with a through hole; the solar water heater is provided with a photovoltaic power generation plate, the photovoltaic power generation plate is connected with a storage battery, the storage battery is connected with a controller, the controller is connected with the electric heating rod, and a relay is arranged between the storage battery and the photovoltaic power generation plate.

Preferably, the photovoltaic power generation plate is a flexible photovoltaic power generation plate arranged at the top end of the heat insulation barrel.

Preferably, the vacuum heat collecting pipe is connected with the solar heating area and supported by the bracket, and the photovoltaic power generation panel is arranged in parallel with the vacuum heat collecting pipe and supported by the bracket.

Preferably, a second temperature sensor, a second blow-down valve and a liquid level meter are arranged at the bottom of the inside of the solar heating area, a water inlet pipe is arranged at the outside of the solar heating area, and a ball float valve positioned in the inside of the solar heating area is arranged on the water inlet pipe.

Preferably, an exhaust pipe penetrating from the bottom of the solar heating zone is vertically arranged in the solar heating zone, and the upper end of the exhaust pipe is higher than the highest water level of the solar heating zone.

Preferably, the water collector includes: the floating ball is arranged at the lower end of the sewer pipe, the sleeve pipe is sleeved on the sewer pipe and led out of the electric heating area, the first pipe is detachably connected with the sleeve pipe, and the first spring is sleeved on the sewer pipe and positioned between the sleeve pipe and the floating ball; the first pipe is provided with a second one-way valve, and the side wall of the sewer pipe is provided with at least one sewer hole.

Preferably, the pipeline comprises an upper water pipe, a lower water pipe, a water supplementing pipe, a first three-way pipe connected with the first pipe, the water supplementing pipe and the upper water pipe and the lower water pipe, a hot water pipe, a cold water pipe and a second three-way pipe connected with the hot water pipe, the cold water pipe and the upper water pipe and the lower water pipe; the water supplementing pipe is connected with the water inlet pipe and is provided with a first electromagnetic valve which is electrically connected with the controller, the hot water pipe is provided with a second electromagnetic valve, and the cold water pipe is provided with a third electromagnetic valve and is connected with a tap water pipe; the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are electrically connected with the controller.

Preferably, the upper cover of the vacuum heat collecting pipe is provided with a hail suppression cover; the hail suppression cover comprises a frame, an iron wire grid and a reinforcing frame, wherein the frame is elastically connected with the support, the iron wire grid is arranged in the frame, the reinforcing frame is arranged in the frame and presses the iron wire grid, and a plurality of bolts are connected with the hail suppression cover and the support.

Preferably, the bolt passes through the through hole on the frame and the reinforcing frame and is connected with the bracket, the bolt can move in the through hole, and the bolt is sleeved with a second spring.

Preferably, the number of the hail suppression covers is two, and the edges of the two hail suppression covers are provided with hinges for connection.

Compared with the prior art, the utility model has the following beneficial effects:

1. the heat-insulating barrel of the solar water heater is internally divided into a solar heating area and an electric heating area by a partition plate made of heat-insulating materials, two sides of the heat-insulating barrel are communicated by a one-way valve, when electric heating is adopted, cold water in the electric heating area is independently heated by an electric heating rod instead of water in the whole barrel, hot water in the electric heating area is taken by a water taking device after heating is finished, and the hot water and the cold water are properly mixed for use by people.

2. The electric heating rod of the solar water heater adopts the photovoltaic power generation plate to supply power for the electric heating rod, the photovoltaic power generation plate is provided with the storage battery, the storage battery stores the electric quantity of the photovoltaic power generation plate for standby, and the storage battery can also output stable voltage and current to ensure the normal use of the electric heating rod; in addition, the accumulator is also provided with a relay as a protection device.

Drawings

FIG. 1 is a schematic view of a first embodiment of a solar water heater;

fig. 2 is a schematic structural view of a heat insulation barrel according to the first embodiment;

FIG. 3 is a schematic structural view of the water intake device;

FIG. 4 is a schematic view of the hail suppression shroud;

FIG. 5 is a schematic view of a structure of a separator;

FIG. 6 is a schematic structural view of a second embodiment of a solar water heater;

fig. 7 is a schematic structural view of a heat insulation barrel according to a second embodiment.

In the figure: the vacuum heat collection tube 2, the bracket 3, the partition plate 4, the solar heating area 5, the electric heating area 6, the electric heating rod 7, the first temperature sensor 8, the water taking device 9, the first blow-down valve 10, the through hole 11, the photovoltaic power generation plate 12, the storage battery 13, the controller 14, the relay 15, the second temperature sensor 16, the second blow-down valve 17, the liquid level meter 18, the water inlet pipe 19, the floating ball 20, the sewer pipe 21, the sleeve 22, the first pipe 23, the first spring 24, the second one-way valve 25, the sewer hole 26, the upper and lower water pipe 27, the water supplementing pipe 28, the first three-way pipe 29, the hot water pipe 30, the cold water pipe 31, the second three-way pipe 32, the first electromagnetic valve 33, the second electromagnetic valve 34, the hail prevention cover 35, the frame 36, the wire grid 37, the reinforcing frame 38, the bolt 39, the second spring 40, the hinge 41, the third electromagnetic valve 42, the first one-way valve 43, the ball float valve 44 and the exhaust pipe 45.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Example I

Referring to fig. 1 to 5, the present utility model provides a technical solution: the solar water heater comprises a heat-preserving barrel 1, a vacuum heat-collecting tube 2 obliquely arranged on the heat-preserving barrel 1, a bracket 3 for supporting the vacuum heat-collecting tube 2 and the heat-preserving barrel 1, and a pipeline capable of feeding and discharging water through a single pipe, wherein a partition plate 4 is arranged in the heat-preserving barrel 1 to divide the heat-preserving barrel 1 into a solar heating area 5 and an electric heating area 6; an electric heating rod 7, a first temperature sensor 8, a water taking device 9 arranged at the bottom end of the electric heating zone 6 and a first blow-down valve 10 are arranged in the electric heating zone 6; the bottom end of the partition plate 4 is provided with a first one-way valve 43 which is communicated with the electric heating area 6 from the solar heating area 5, and the top end of the partition plate 4 is provided with a through hole 11; the solar water heater is provided with a photovoltaic power generation plate 12, the photovoltaic power generation plate 12 is connected with a storage battery 13, the storage battery 13 is connected with a controller 14, the controller 14 is connected with the electric heating rod 7, and a relay 15 is arranged between the storage battery 13 and the photovoltaic power generation plate 12. The material of baffle 4 is thermal insulation material, and the water that can let solar heating zone 5 of first check valve 43 gets into electrical heating zone 6, and the hot water that adds hot zone 6 heating can not flow backwards and get into solar heating zone 5, and concentrated energy heats electrical heating zone 6 earlier when heating, and it is less that the water heating power consumption of comparing whole heat preservation bucket 1 is less, less in time spent. The through holes 11 at the upper end of the partition plate 4 can balance the air pressure of the electric heating area 6 and the solar heating area 5, so that water can circulate. The storage battery 13 stores the electric quantity of the photovoltaic power generation plate 12 for standby, and the storage battery 13 can also output stable voltage and current to ensure the normal use of the electric heating rod 7; the battery 13 is further provided with a relay 15 as a protection device. The relay 15 can be powered off after the storage battery 13 is full, so that the photovoltaic power generation panel 12 is prevented from being continuously charged, and the service time of the storage battery 13 is prolonged; in addition, the storage battery 13 is also a product with a voltage stabilizing circuit board, and can stably output 12V voltage, the electric heating rod 7 is an 'infrared light wave heating tube-12V-100W', and the electric heating rod 7 is provided with an insulating carbon fiber shell, so that danger caused by electric leakage to people is prevented. The first temperature sensor 8 is used for monitoring the hot water temperature of the electric heating area 6, and is convenient for people to use. The water intake 9, i.e. the water outlet, the first blow down valve 10 is used to clean the scale inside the electrically heated zone 6.

The first arrangement of the photovoltaic power generation panel 12 is: the photovoltaic power generation plate 12 is a flexible photovoltaic power generation plate 12 arranged at the top end of the heat preservation barrel 1. The flexible photovoltaic power generation panel 12 can be attached to the heat insulation barrel 1, wind resistance is reduced while photovoltaic power generation is performed, and the flexible photovoltaic power generation panel is a safety measure for a solar water heater installed at a high place. Holes for installing the evacuated collector tubes 2 are arranged on the side walls of the solar heating area 5 and the electric heating area 6.

The bottom of the inside of solar heating zone 5 is equipped with second temperature sensor 16, second blowoff valve 17 and level gauge 18, the outside of solar heating zone 5 is equipped with inlet tube 19, inlet tube 19 is equipped with and is located the ball cock 44 of the inside of solar heating zone 5. The second temperature sensor 16 is used for monitoring the temperature of the solar heating area 5 and providing the temperature to the controller 14 for display, so that a person can decide whether to use the electric heating rod 7; the second blow-down valve 17 is used for cleaning scale in the solar heating area 5; the level gauge 18 is used to monitor the water level in the heat-insulating barrel 1, so that a person can know whether the water in the heat-insulating barrel 1 is enough or not. The float valve 44 is a protection device which closes the water inlet pipe 19 when the water level in the heat preservation tub 1 is highest.

The inside of the solar heating zone 5 is vertically provided with an exhaust pipe 45 penetrating out from the bottom of the solar heating zone 5, and the upper end of the exhaust pipe 45 is higher than the highest water level of the solar heating zone 5. The built-in exhaust pipe 45 can protect the exhaust pipe 45 in the heat-preserving barrel 1, the exhaust pipe 45 is prevented from being blocked due to foreign matters, the exhaust pipe 45 cannot fall down, bend, break and the like due to external force, the exhaust pipe 45 is smooth, and the inner container of the heat-preserving barrel 1 can be effectively prevented from being shrunken.

The water intake device 9 includes: a floating ball 20, a sewer pipe 21 arranged at the lower end of the floating ball 20, a sleeve 22 sleeved on the sewer pipe 21 and leading to the outside of the electric heating zone 6, a first pipe 23 detachably connected with the sleeve 22, and a first spring 24 sleeved on the sewer pipe 21 and positioned between the sleeve 22 and the floating ball 20; the first pipe 23 is provided with a second one-way valve 25, and the side wall of the sewer pipe 21 is provided with at least one sewer hole 26.

The floating ball 20 floats on the water surface, and the sewer pipe 21 ascends and descends along with the floating ball 20 along with the ascending and descending of the liquid surface, so that the sewer hole 26 can always take the uppermost hot water. The number of the water outlet holes 26 is preferably four, the first spring 24 has the function of excessively sucking force when the water collector 9 discharges water, the water outlet holes 26 are sucked into the sleeve 22 in advance to prevent hot water from going under the water, the second one-way valve 25 prevents cold water from being directly injected into the heat insulation barrel 1 when water is fed, the temperature in the electric heating area 6 is directly influenced, and meanwhile the cold water is prevented from flushing the water outlet pipe 21 from the sleeve 22. The water with high temperature is always on the upper layer of the heat-preserving barrel 1 when the solar water heater heats hot water, the floating ball 20 of the water taking device 9 floats in the hot water on the upper layer with the water discharging pipe 21, the hot water enters the sleeve 22 from the water discharging hole 26 and then enters the hot water pipe 30 for people to use, and the water discharging hole 26 is always in the hot water on the upper layer, so that the hottest water is always taken, even if cold water is mixed in, the cold water is settled in the evacuated collector tube 2, and the influence on the temperature of the hot water on the upper layer is not obvious; if the hot water is not replenished, the water drain hole 26 descends along with the floating ball 20 to take the hot water.

The pipeline comprises an upper water pipe and a lower water pipe 27, a water supplementing pipe 28, a first three-way pipe 29 connected with the first pipe 23, the water supplementing pipe 28 and the upper water pipe and the lower water pipe 27, a hot water pipe 30, a cold water pipe 31 and a second three-way pipe 32 connected with the hot water pipe 30, the cold water pipe 31 and the upper water pipe and the lower water pipe 27; the water replenishing pipe 28 is connected with the water inlet pipe 19 and is provided with a first electromagnetic valve 33 electrically connected with the controller 14, the hot water pipe 30 is provided with a second electromagnetic valve 34, and the cold water pipe 31 is provided with a third electromagnetic valve 42 and is connected with a tap water pipe; the first solenoid valve 33, the second solenoid valve 34, and the third solenoid valve 42 are electrically connected to the controller 14. When water is needed to be fed, the water is fed: the controller 14 opens the second solenoid valve 34 and the first solenoid valve 33, closes the third solenoid valve 42, and cold water directly enters the solar heating zone from the cold water pipe 31 through the water supplementing pipe 28, and when hot water is needed: the controller 14 opens the third solenoid valve 42, closes the first solenoid valve 33 and the second solenoid valve 34, and the hot water enters the drain pipe 21 from the drain hole 26, passes through the sleeve 22, the first pipe 23, and finally discharges the hot water pipe 30. It should be noted that: after the hot water is discharged from the hot water pipe 30, a device for mixing cold and hot water should be provided in a bathroom, a washstand or other application scenes.

The upper cover of the vacuum heat collecting pipe 2 is provided with a hail suppression cover 35; the hail suppression cover 35 comprises a frame 36 elastically connected with the support 3, an iron wire grid 37 arranged in the frame 36, a reinforcing frame 38 arranged in the frame 36 and pressing the iron wire grid 37, and a plurality of bolts 39 for connecting the hail suppression cover 35 with the support 3. Hail shield 35 is used to protect the evacuated collector tubes of solar water heaters installed in hail frequent areas. The reinforcing frame 38 has a frame 36 with the strength of the frame 36, and cross bars are arranged in the frame 36 and support the wire grids 37, so that the wire grids 37 are prevented from being enlarged under the repeated impact of hail, and the protection of the evacuated collector tube 2 is lost.

The bolt 39 is connected with the bracket 3 through the through hole 11 arranged on the frame 36 and the reinforcing frame 38, the bolt 39 can move in the through hole 11, and the bolt 39 is sleeved with a second spring 40. The bolt 39 is connected the hail prevention cover 35 with the support 3, and the second spring 40 enables the hail prevention cover 35 to have an elastic movement distance with the support 3, hail impacts on the hail prevention cover 35, the elastic movement distance can prevent hail particles from being blocked in grids of the iron wire grids 37, the grids become large after repeated impact, and the protection capability is reduced.

The number of the hail suppression covers 35 is two, and the edges of the two hail suppression covers 35 are provided with hinges 41 for connection. This structure can make hail suppression cover 35 can fold, convenient transportation, installation.

The controller 14 in this embodiment preferably employs: mobile internet solar instrument, model: the HY-1909-APP has the functions of temperature control monitoring, heating control and electromagnetic valve control, and can be customized, and particularly the intelligent life APP matched with the controller 14 can be used for remotely operating the controller 14 through a mobile phone.

Example II

Referring to fig. 6 to 7, the present utility model provides a technical solution:

the second arrangement of the photovoltaic power generation panel 12 is: the vacuum heat collecting pipe 2 is connected with the solar heating area 5 and supported by the support 3, and the photovoltaic power generation panel 12 is arranged in parallel with the vacuum heat collecting pipe 2 and supported by the support 3. The area above the bracket 3 in front of the heat preservation barrel 1 is divided into two areas, one area is provided with a vacuum heat collection pipe 2 connected to the side wall of the solar heating area 5, and the other area is provided with a photovoltaic power generation plate 12.

In summary, the utility model relates to a solar water heater when in use:

the user operates the solar water heater through a screen and buttons on the controller 14:

the water supply function of the controller 14 is used when water supply is required: the controller 14 opens the second electromagnetic valve 34 and the first electromagnetic valve 33, closes the third electromagnetic valve 42, cold water directly enters the solar heating zone 5 from the cold water pipe 31 through the water supplementing pipe 28, and newly entered water enters the electric heating zone 6 according to the communicating vessel principle; specifically, the level gauge 18 detects the water level in the heat-preserving container 1, and the controller 14 automatically triggers the water feeding program when the water level reaches a set minimum value;

the hot water function of the controller 14 is used when hot water is required: the controller 14 opens the third electromagnetic valve 42, closes the first electromagnetic valve 33 and the second electromagnetic valve 34, and hot water enters the sewer pipe 21 from the sewer hole 26, passes through the sleeve 22 and the first pipe 23, and finally discharges the hot water pipe 30, so that a user can perform cold and hot mixed use according to the body feeling of the user and the temperature displayed by the controller 14.

The heating function of the controller 14 is used when the water in the heat-insulating tub 1 needs auxiliary heating: the controller 14 turns on the electric heating rod 7 to heat the cold water in the electric heating area 6, and then uses the hot water by using the hot water function.

Remote control: the user can use the mobile phone to install the intelligent life app matched with the controller 14 to check the water level and the temperature in the heat preservation barrel 1, and remotely operate water supplementing or heating by using a water feeding function.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a solar water heater, includes heat preservation bucket (1), install vacuum heat collection tube (2) on heat preservation bucket (1) of slope, support vacuum heat collection tube (2) with support (3) of heat preservation bucket (1) to and can the pipeline of single tube water supply and drainage, its characterized in that: a partition plate (4) is arranged in the heat-preserving barrel (1) to divide the heat-preserving barrel (1) into a solar heating area (5) and an electric heating area (6); an electric heating rod (7), a first temperature sensor (8), a water taking device (9) arranged at the bottom end of the electric heating zone (6) and a first blow-down valve (10) are arranged in the electric heating zone (6); the bottom end of the partition plate (4) is provided with a first one-way valve (43) leading from the solar heating area (5) to the electric heating area (6), and the top end of the partition plate (4) is provided with a through hole (11); the solar water heater is provided with a photovoltaic power generation plate (12), the photovoltaic power generation plate (12) is connected with a storage battery (13), the storage battery (13) is connected with a controller (14), the controller (14) is connected with the electric heating rod (7), and a relay (15) is arranged between the storage battery (13) and the photovoltaic power generation plate (12).

2. A solar water heater as defined in claim 1, wherein: the photovoltaic power generation plate (12) is a flexible photovoltaic power generation plate (12) arranged at the top end of the heat preservation barrel (1).

3. A solar water heater as defined in claim 1, wherein: the vacuum heat collecting tube (2) is connected with the solar heating area (5) and supported by the support (3), and the photovoltaic power generation panel (12) is arranged in parallel with the vacuum heat collecting tube (2) and supported by the support (3).

4. A solar water heater according to any one of claims 1-3, wherein: the bottom of the inside of solar heating zone (5) is equipped with second temperature sensor (16), second blowoff valve (17) and level gauge (18), the outside of solar heating zone (5) is equipped with inlet tube (19), inlet tube (19) are equipped with and are located float valve (44) of the inside of solar heating zone (5).

5. A solar water heater as defined in claim 4, wherein: an exhaust pipe (45) penetrating out of the bottom of the solar heating area (5) is vertically arranged in the solar heating area (5), and the upper end of the exhaust pipe (45) is higher than the highest water level of the solar heating area (5).

6. A solar water heater as defined in claim 4, wherein: the water intake device (9) comprises: the floating ball (20), the sewer pipe (21) that locates in the lower extreme of the said floating ball (20), sleeve pipe (22) that is set up on the said sewer pipe (21) and led to outside the said electric heating area (6), the first tube (23) that is connected with said sleeve pipe (22) detachably, the first spring (24) that is set up on the said sewer pipe (21) and located between said sleeve pipe (22) and said floating ball (20); the first pipe (23) is provided with a second one-way valve (25), and the side wall of the sewer pipe (21) is provided with at least one sewer hole (26).

7. A solar water heater as defined in claim 6, wherein: the pipeline comprises an upper water pipe (27), a lower water pipe (28), a water supplementing pipe (28), a first three-way pipe (29) connected with the first pipe (23), the water supplementing pipe (28) and the upper water pipe (27), a hot water pipe (30), a cold water pipe (31) and a second three-way pipe (32) connected with the hot water pipe (30), the cold water pipe (31) and the upper water pipe (27); the water supplementing pipe (28) is connected with the water inlet pipe (19) and is provided with a first electromagnetic valve (33) electrically connected with the controller (14), the hot water pipe (30) is provided with a second electromagnetic valve (34), and the cold water pipe (31) is provided with a third electromagnetic valve (42) and is connected with a tap water pipe; the first electromagnetic valve (33), the second electromagnetic valve (34) and the third electromagnetic valve (42) are electrically connected with the controller (14).

8. A solar water heater as defined in claim 4, wherein: an hail suppression cover (35) is arranged on the upper cover of the vacuum heat collection tube (2); hail suppression cover (35) include with frame (36) of support (3) elastic connection locates iron wire grid (37) in frame (36), locate in frame (36) and push down reinforcing frame (38) of iron wire grid (37), a plurality of connections hail suppression cover (35) with bolt (39) of support (3).

9. A solar water heater as defined in claim 8, wherein: the bolt (39) passes through the through hole (11) arranged on the frame (36) and the reinforcing frame (38) and is connected with the bracket (3), the bolt (39) can move in the through hole (11), and a second spring (40) is sleeved on the bolt (39).

10. A solar water heater as defined in claim 8, wherein: the number of the hail suppression covers (35) is two, and the edges of the two hail suppression covers (35) are provided with hinges (41) for connection.