Solar water heater

Abstract

The present invention relates to the technical field of solar water heaters, and in particular to a solar water heater. The solar water heater comprises a heat exchange tank, a serpentine tube arranged in the heat exchange tank, a water storage tank, and a hot water pipe coiled on the outer wall of the water storage tank; a water use cavity for water storage is formed in the water storage tank, and the inner cavity of the serpentine tube, the inner cavity of the hot water pipe, the inner cavity of the circulation pipe, and the water use cavity together form a circulating heat exchange pipeline for the water body in the water supply cavity to circulate. When the present invention is in use, after the water inside the serpentine tube is heated, it flows into the hot water pipe through the top of the serpentine tube, and the heat of the hot water is used to heat the outer wall of the water storage tank through the spirally wound hot water pipe. After a long time, the water temperature inside the water storage tank can be increased. Due to the setting of the heat preservation box, especially in winter, the heat loss of the hot water in the heat exchange inside the hot water pipe can be reduced. Through the setting of the hot water pipe, the water temperature inside the water storage tank can be increased, and the water temperature is more balanced and heat-insulated than the traditional one, and the utilization rate of the hot water can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of solar water heaters, in particular to a solar water heater. Background Art

[0002] A solar water heater uses sunlight to heat water. Currently, the mainstream vacuum tube type of household solar water heater consists of a heat collecting tube, a heat exchange tank, a heat exchange tube system, a water storage tank, and a support. The heat exchange tank is filled with a heat transfer medium, such as water. The heat collecting tube uses solar energy to heat the heat transfer medium, which then flows through the heat exchange tube system to heat the water in the water storage tank, which can then be used as household hot water.

[0003] Existing heat exchange pipe systems typically have two serpentine pipes, one in the water exchange tank and the other in the water storage tank. These two serpentine pipes form an independent internal circulation heat exchange system. This heat exchange method makes it difficult to achieve balanced heating of the water in the water storage tank. In other words, the closer the water in the water storage tank is to the corresponding serpentine pipe, the higher the water temperature will be. Summary of the Invention

[0004] The present invention provides a solar water heater, which can overcome certain defects of the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The solar water heater includes a heat exchange tank, a serpentine tube arranged in the heat exchange tank, a water storage tank, and a hot water pipe coiled around the outer wall of the water storage tank; a water cavity for storing water is formed in the water storage tank, and the inner cavity of the serpentine tube, the inner cavity of the hot water pipe, the inner cavity of the circulation pipe, and the water cavity together form a circulating heat exchange pipeline for circulating water in the water cavity.

[0007] Preferably, an insulation box is provided outside the water tank, an exhaust heat recovery pipe is provided between the heat exchange water tank and the water tank, and an anti-overheating component for controlling the temperature drop is provided on the exhaust heat recovery pipe.

[0008] Preferably, the overheating prevention component includes a shell, a mounting tube is provided at the bottom of the shell, a fastening ring is sleeved on the mounting tube, the fastening ring is threadedly installed at the bottom of the shell, a pressure switch is provided inside the mounting tube, and a sealing ring is provided between the mounting tube and the shell.

[0009] Preferably, an air inlet channel and an air outlet channel are provided inside the shell, a channel is provided at one end of the air outlet channel, a clamping ring is fixedly connected to the bottom of the channel, and a sealing assembly for opening and closing the pressure switch is slidably installed inside the channel.

[0010] Preferably, the sealing assembly includes a sealing plug, a spring is sleeved on the sealing plug, a rotating rod for adjusting the elastic strength of the spring is threaded on the top of the sealing plug, and a rotating handle is fixedly connected to the top of the rotating rod.

[0011] Preferably, a water collecting groove and a sealing groove are provided on the top of the sealing plug. The water collecting groove is used to collect the residual condensed water. A sealing ring is provided inside the sealing groove. The clamping ring is clamped inside the sealing groove.

[0012] Preferably, a first three-way joint is provided at the circulation pipe and the serpentine pipe, and a cold water inlet pipe is fixedly connected to the remaining connecting end of the first three-way joint. A water replenishment assembly is provided between the cold water inlet pipe and the circulation pipe, and the water replenishment assembly is used to transport cold water to the heat exchange water tank for cooling.

[0013] Preferably, a plurality of fixing frames for fixing the hot water pipes are provided on the outer wall of the water storage tank, the water inlet ends of the hot water pipes are wound upward from the bottom of the water storage tank, and a hot water outlet pipe is provided on the water storage tank.

[0014] Preferably, the water replenishment assembly includes a second three-way joint and a third three-way joint, which are respectively arranged on the cold water inlet pipe and the circulation pipe, and a fourth three-way joint is arranged between the second three-way joint and the third three-way joint. The top of the fourth three-way joint is fixedly connected to the water inlet pipe, and the top of the water inlet pipe is connected to one side of the heat exchange water tank, and a water replenishment pump is arranged on the water inlet pipe.

[0015] Preferably, solenoid valves are provided between the fourth three-way joint and the second three-way joint, between the fourth three-way joint and the third three-way joint, and between the first three-way joint and the second three-way joint.

[0016] The present invention has the following beneficial effects:

[0017] When the present invention is in use, after the water inside the serpentine tube is heated, it flows into the hot water pipe through the top of the serpentine tube. The heat of the hot water is used to heat the outer wall of the water storage tank through the spirally wound hot water pipe. After a long time, the water temperature inside the water storage tank can be increased. Due to the provision of the heat preservation box, the heat loss of the hot water in the hot water pipe during heat exchange can be reduced, especially in winter. The provision of the hot water pipe can not only increase the water temperature inside the water storage tank, but also make the water temperature more balanced and heat-insulated than the traditional one, and improve the utilization rate of the hot water.

[0018] In addition, through the setting of overheating prevention components and water supply components, when the vacuum heat collecting tube absorbs heat and causes the water temperature inside the heat exchange tank to overheat, the pressure switch opens to control the water supply pump to pump the cold water inside the cold water inlet pipe or the water inside the water storage tank into the heat exchange tank for cooling, effectively reducing the temperature of the heat exchange tank and preventing safety accidents caused by excessive temperature in the heat exchange tank. Mechanical structure replaces the use of electronic devices, which is more stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the solar water heater proposed by the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the heat exchange tank of the solar water heater proposed in the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the heat exchange component of the solar water heater proposed in the present invention;

[0022] Figure 4 This is a schematic diagram of the connection layout structure of the heat exchange component, cold water inlet pipe, serpentine pipe and water supply component of the solar water heater proposed in the present invention;

[0023] Figure 5 This is a schematic diagram of the overall structure of the anti-overheating component of the solar water heater proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the overall explosion structure of the anti-overheating component of the solar water heater proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the overall cross-sectional structure of the overheating prevention component of the solar water heater proposed by the present invention;

[0026] Figure 8 This is a schematic cross-sectional structure diagram of the sealing component of the solar water heater proposed in the present invention. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Example 1

[0029] See also Figure 1-3 , the solar water heater includes a heat exchange tank 100, a serpentine tube 220 arranged in the heat exchange tank 100, a water storage tank 202 and a hot water pipe 203 coiled at the outer wall of the water storage tank 202; a water cavity for storing water is formed in the water storage tank 202, and the inner cavity of the serpentine tube 220, the inner cavity of the hot water pipe 203, the inner cavity of the circulation pipe 212 and the water cavity together form a circulating heat exchange pipeline for the water body in the water cavity to circulate, wherein the inlet and outlet pipes of the serpentine tube 220 are in the same direction, and the outlet pipe is located above the inlet pipe. A hot water outlet pipe 205 is connected to one end of the water storage tank 202, and the hot water outlet pipe 205 is located at the top of one end of the water storage tank 202. The water end for showering is connected to the hot water outlet pipe 205, and a plurality of fixing brackets 204 for fixing the hot water pipe 203 are provided on the outer wall of the water storage tank 202;

[0030] An exhaust heat recovery pipe 230 is provided between the water exchange tank 100 and the water storage tank 202, and an overheating prevention component 240 for controlling the temperature drop is provided on the exhaust heat recovery pipe 230;

[0031] When the present invention is in use, the heat conducting medium inside the vacuum heat collecting tube is heated and vaporized by absorbing heat through the vacuum heat collecting tube, and the heat is carried up to the top condensing end. The steam exchanges heat with the water inside the heat exchange water tank 100 at the condensing end, releases heat and condenses into liquid, and flows back to the bottom heating end, and the cycle is repeated. When the water temperature inside the heat exchange water tank 100 is increased, it exchanges heat with the serpentine tube 220, and the cold water inside the water storage tank 202 re-enters the serpentine tube 220 through the circulation pipe 212 for circulating heat exchange. After the water in the water tank is heated, it flows into the hot water pipe 203 through the top of the serpentine pipe 220. The heat of the hot water is used to heat the outer wall of the water tank 202 through the spirally wound hot water pipe 203. After a long time, the water temperature inside the water tank 202 can be increased. Due to the setting of the insulation box 201, the heat loss of hot water in the heat exchange inside the hot water pipe 203 can be reduced, especially in winter. Through the setting of the hot water pipe 203, the water temperature inside the water tank 202 can be increased, and the water temperature is more balanced and heat-insulated than the traditional one, and the utilization rate of hot water can be improved.

[0032] Example 2

[0033] See also Figure 4-8 , which is different from Example 1 in that:

[0034] The overheating prevention component 240 includes a shell 241, and an air inlet channel 2411 and an air outlet channel 2412 are provided inside the shell 241. The air inlet channel 2411 is provided with a connecting air channel near one end of the air outlet channel 2412, and a channel 2413 is provided at one end of the air outlet channel 2412. A clamping ring 2414 is fixedly connected to the bottom of the channel 2413, and a sealing component 244 for opening and closing the pressure switch 247 is slidably installed inside the channel 2413. The sealing component 244 includes a sealing plug 2441, and a water collecting trough 2442 and a sealing groove 2443 are provided on the top of the sealing plug 2441. The water collecting trough 2442 is used to collect residual condensed water, and a sealing ring is provided inside the sealing groove 2443. The clamping ring 2414 is clamped inside the sealing groove 2443, and a spring 2444 is sleeved on the sealing plug 2441. The top thread of the sealing plug 2441 is provided with an adjusting spring 2444 with strong elasticity. The turning rod 245 has a rotating height of 10 ...

[0035] The water replenishment assembly 250 includes a second three-way joint 251 and a third three-way joint 252. The second three-way joint 251 and the third three-way joint 252 are respectively arranged on the cold water inlet pipe 210 and the circulation pipe 212. The circulation pipe 212 is provided with a circulation pump, and the water inlet pipe 254 is provided with a water replenishment pump. A fourth three-way joint 253 is provided between the second three-way joint 251 and the third three-way joint 252. The top of the fourth three-way joint 253 is fixedly connected to the water inlet pipe 254. The fourth three-way joint 253 Solenoid valves are provided between the second three-way joint 251, the fourth three-way joint 253 and the third three-way joint 252, and the first three-way joint 211 and the second three-way joint 251. When the internal temperature of the hot water exchange tank 100 is normal, the fourth three-way joint 253 and the second three-way joint 251, the fourth three-way joint 253 and the third three-way joint 252, and the first three-way joint 211 and the second three-way joint 251 are all in a closed state. The top of the water inlet pipe 254 is connected to the side of the hot water exchange tank 100.

[0036] When the vacuum heat collecting tube absorbs heat and causes the water temperature inside the water exchange tank 100 to overheat, the water inside the water exchange tank 100 evaporates and vaporizes into the anti-overheating component 240 through the exhaust heat recovery pipe 230, and enters the connecting channel through the air inlet channel 2411. Since the water evaporates and vaporizes inside the water exchange tank 100, high pressure is generated, and the water vapor pushes the sealing plug 2441 downward. At this time, the spring 2444 is stretched, and the retaining ring 2414 is separated from the sealing groove 2443, so that the air inlet channel 2411, the connecting channel and the channel 2413 and the air outlet channel 2412 are connected. The sealing plug 2441 moves downward and presses the pressure switch 247 to open. At the same time, the fourth three-way joint 253 and the third three-way joint 252 and the solenoid valve between the first three-way joint 211 and the second three-way joint 251 are closed. Closed, the solenoid valve between the fourth three-way joint 253 and the second three-way joint 251 is opened. At this time, the pressure switch 247 is turned on to control the water supply pump to pump the cold water inside the cold water inlet pipe 210 into the hot water exchange tank 100 for cooling. The cycle continues, and the water vapor entering the air outlet channel 2412 flows back to the water storage tank 202 through the exhaust heat recovery pipe 230. When the temperature inside the hot water exchange tank 100 drops, the air pressure inside the hot water exchange tank 100 decreases. At this time, the spring 2444 retracts and pulls up the sealing plug 2441. The sealing plug 2441 is released from the pressure on the pressure switch 247, so that the solenoid valve between the water supply pump and the fourth three-way joint 253 and the second three-way joint 251 is closed, and the snap ring 2414 is re-engaged in the sealing groove 2443 to complete the seal;

[0037] When the pressure switch 247 is in continuous operation for a long time, the pressure switch 247 controls the solenoid valve between the fourth three-way connector 253 and the third three-way connector 252 to open, and the solenoid valve between the fourth three-way connector 253 and the second three-way connector 251 to close, so that the water inside the water storage tank 202 is pumped into the hot water exchange tank 100 for cooling, effectively reducing the temperature of the hot water exchange tank 100 and preventing the temperature inside the hot water exchange tank 100 from being too high and causing a safety accident. With the provision of the overheating prevention component 240, there is no need to provide a temperature sensor or a water level sensor inside the hot water exchange tank 100 or the water storage tank 202, thereby reducing the use of electronic devices and improving the accuracy of the overheating prevention mechanism.

[0038] By setting up the water collecting tank 2442, part of the condensed cold water remaining inside the exhaust heat recovery pipe 230 and the air intake channel 2411 can be collected, and can be cleaned by disassembling the installation cylinder 242 and the sealing component 244, or no treatment is required. It is also convenient to replace the internal sealing ring. When the condensed water level inside the anti-overheating component 240 is higher than the bottom of the connecting channel, the next time the water inside the heat exchange water tank 100 evaporates and vaporizes to generate high pressure, the condensed water inside the anti-overheating component 240 can also be discharged without affecting the operation of the anti-overheating component 240. The discharged condensed water is discharged to the inside of the water storage tank 202 through the exhaust heat recovery pipe 230, thereby improving the utilization rate of water.

[0039] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of this template.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A solar water heater, characterized in that: It comprises a heat exchange water tank (100), a serpentine tube (220) arranged in the heat exchange water tank (100), a water storage tank (202), and a hot water pipe (203) coiled around the outer wall of the water storage tank (202); a water use cavity for storing water is formed in the water storage tank (202); the inner cavity of the serpentine tube (220), the inner cavity of the hot water pipe (203), the inner cavity of the circulation pipe (212), and the water use cavity together form a circulating heat exchange pipeline for circulating water in the water use cavity; An insulation box (201) is arranged outside the water storage tank (202), an exhaust heat recovery pipe (230) is arranged between the water exchange tank (100) and the water storage tank (202), and an overheating prevention component (240) for controlling temperature reduction is arranged on the exhaust heat recovery pipe (230); The overheating prevention component (240) comprises a shell (241), a mounting tube (242) is arranged at the bottom of the shell (241), a fastening ring (243) is sleeved on the mounting tube (242), the fastening ring (243) is threadedly mounted on the bottom of the shell (241), a pressure switch (247) is arranged inside the mounting tube (242), and a sealing ring is arranged between the mounting tube (242) and the shell (241).

2. The solar water heater according to claim 1, characterized in that: An air inlet channel (2411) and an air outlet channel (2412) are provided inside the housing (241); a channel (2413) is provided at one end of the air outlet channel (2412); a clamping ring (2414) is fixedly connected to the bottom of the channel (2413); and a sealing assembly (244) for opening and closing a pressure switch (247) is slidably installed inside the channel (2413).

3. The solar water heater according to claim 2, characterized in that: The sealing assembly (244) comprises a sealing plug (2441), a spring (2444) is sleeved on the sealing plug (2441), a rotating rod (245) for adjusting the elastic strength of the spring (2444) is threadedly provided on the top of the sealing plug (2441), and a rotating handle (246) is fixedly connected to the top of the rotating rod (245).

4. The solar water heater according to claim 3, characterized in that: A water collecting groove (2442) and a sealing groove (2443) are provided at the top of the sealing plug (2441); the water collecting groove (2442) is used to collect residual condensed water; a sealing ring is provided inside the sealing groove (2443); and the clamping ring (2414) is clamped inside the sealing groove (2443).

5. The solar water heater according to claim 1, characterized in that: A first three-way joint (211) is provided at the circulation pipe (212) and the serpentine pipe (220); a cold water inlet pipe (210) is fixedly connected to the remaining connection end of the first three-way joint (211); a water replenishment component (250) is provided between the cold water inlet pipe (210) and the circulation pipe (212); the water replenishment component (250) is used to transport cold water to the water exchange tank (100) for cooling.

6. The solar water heater according to claim 1, characterized in that: A plurality of fixing frames (204) for fixing the hot water pipe (203) are arranged on the outer wall of the water storage tank (202); the water inlet end of the hot water pipe (203) is wound upward from the bottom of the water storage tank (202); and a hot water outlet pipe (205) is connected to the water storage tank (202).

7. The solar water heater according to claim 5, characterized in that: The water replenishment component (250) comprises a second three-way joint (251) and a third three-way joint (252), the second three-way joint (251) and the third three-way joint (252) being arranged on the cold water inlet pipe (210) and the circulation pipe (212) respectively, a fourth three-way joint (253) being arranged in communication between the second three-way joint (251) and the third three-way joint (252), a water inlet pipe (254) being fixedly connected to the top end of the fourth three-way joint (253), the top end of the water inlet pipe (254) being arranged in communication with one side of the hot water exchange tank (100), and a water replenishment pump being arranged on the water inlet pipe (254).

8. The solar water heater according to claim 7, characterized in that: Solenoid valves are provided between the fourth three-way joint (253) and the second three-way joint (251), between the fourth three-way joint (253) and the third three-way joint (252), and between the first three-way joint (211) and the second three-way joint (251).

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