Photovoltaic and photo-thermal integrated water heater with staggered electricity storage and heating functions
By storing low-temperature water and high-temperature water in separate sections in the water tank and using a photovoltaic structure to convert the water into electricity, the problem of hot water supply in photovoltaic-thermal integrated water heaters when there is insufficient sunlight is solved, thus achieving a stable and continuous hot water supply.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 海宁市产品质量检验检测所(浙江省太阳能产品质量检验中心)
- Filing Date
- 2025-04-25
- Publication Date
- 2026-04-24
AI Technical Summary
Existing photovoltaic-thermal integrated water heaters suffer from reduced heat collection efficiency on cloudy, rainy, or insufficient sunlight days, resulting in an unstable supply of hot water. Furthermore, during peak electricity consumption periods, insufficient solar power supply cannot guarantee the normal operation of the equipment.
The water storage tank is divided into low-temperature and high-temperature sections by partitions, with initial temperature stratification. High-temperature hot water is supplied first, and solar energy is converted into electricity using a photovoltaic structure. The controller processes the electricity to provide power or store it in real time, ensuring a continuous supply of hot water.
It enables a continuous supply of hot water under different lighting conditions, improving the stability and efficiency of hot water supply and ensuring that the equipment can operate normally even during peak electricity consumption periods.
Smart Images
Figure CN224162755U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of integrated water heater technology, specifically relating to a photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function. Background Technology
[0002] Solar energy, as a clean and renewable energy source, has received widespread attention from countries around the world. Solar photovoltaic and solar thermal integration technology, as a new energy utilization method, combines photovoltaic power generation with solar thermal utilization, which can generate both electricity and heat, thus improving the comprehensive utilization efficiency of solar energy.
[0003] In existing technologies, photovoltaic-thermal integrated water heaters rely entirely on solar radiation. On cloudy or rainy days or in winter when sunlight is insufficient, the heat collection efficiency drops significantly, and they may not even be able to provide enough hot water, making it difficult to guarantee a stable hot water supply. They also cannot store electrical energy for use at other times when solar energy resources are abundant, and if solar power supply is insufficient during peak electricity consumption periods, the normal operation of the equipment cannot be guaranteed. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a photovoltaic-thermal integrated water heater with staggered-time electricity storage and heating function. The water tank is divided into zones by a partition to store low-temperature water and high-temperature water. The initial temperature is stratified, and high-temperature hot water is supplied first. Furthermore, solar energy is converted into electrical energy by a photovoltaic structure. The controller processes the energy and can supply power in real time or store it in a battery to achieve staggered power use and ensure a continuous supply of hot water.
[0005] This utility model provides the following technical solution: a photovoltaic and solar thermal integrated water heater with staggered energy storage and heating function, comprising: a base, a protective structure at the center of the upper end face of the base, a water storage tank at the center of the upper end face of the protective structure, a heating structure sleeved on the inner side wall of the water storage tank, and a photovoltaic structure inclinedly provided at the lower center of one side wall of the base.
[0006] The protective structure includes a protective pad, which is fitted onto the center of the upper end face of the base. The water storage tank is located at the center of the upper end face of the protective pad. There are retaining rings at the front and rear of the center of the upper end face of the water storage tank. Flanges are provided at the front and rear of both sides of the upper end face of the base and at the center of the lower end face of the two retaining rings. Bolts are provided at the center of the upper end face of the two retaining rings at the top.
[0007] As a preferred embodiment of this utility model, the heating structure includes an inner liner, which is fitted onto the inner wall of the water storage tank. A partition is provided at the center of the inner liner, and an electromagnetic valve is provided at the center of the front end face of the partition. Electric heating tubes are provided at the front and rear of the center of the inner liner.
[0008] As a preferred embodiment of this utility model, the photovoltaic structure includes a frame, which is located at the lower center of one side wall of the base. A water pipe is located at the lower center of the frame. A heat collection plate is located inside the frame on the upper end of the water pipe. A photovoltaic-thermal integrated component is located at the center of the upper end of the heat collection plate. A controller is located at the front center of the lower end of the frame. A battery is located at the rear center of the lower end of the frame.
[0009] As a preferred embodiment of this utility model, one end of each of the four bolts passes through the upper end face of the two upper flanges and the lower end face of the two lower flanges respectively, and the ends of the bolts are threaded and rotatably connected to the inside of the two lower flanges.
[0010] As a preferred embodiment of this invention, both the protective pad and the two retaining rings are made of rubber.
[0011] As a preferred embodiment of this utility model, the inner liner is made of stainless steel.
[0012] As a preferred embodiment of this utility model, a water inlet is provided at the rear center of the upper end face of the water storage tank, and a drain outlet is provided at the upper center of the front end face of the water storage tank. A ball valve is provided at the center of both the water inlet and the drain outlet.
[0013] The beneficial effects of this utility model are:
[0014] 1. In this utility model, the water storage tank is divided into low-temperature water and high-temperature water by partitions, and the initial temperature is layered. High-temperature hot water is supplied first. In addition, solar energy is converted into electrical energy by using a photovoltaic structure. The controller processes the energy and can supply power in real time or store it in a battery to achieve staggered power use and ensure a continuous supply of hot water.
[0015] 2. In this utility model, the protective pad is made of rubber and is used in conjunction with retaining rings, bolts and flanges to stabilize the water storage tank, prevent external vibration and impact from damaging the equipment, ensure the stability of the equipment during photothermal conversion, and improve the light collection efficiency of photovoltaic integrated modules and heat collection panels. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a three-dimensional orthographic structural diagram of the present invention;
[0018] Figure 3 This is a three-dimensional side sectional view of the present invention;
[0019] Figure 4 This is a three-dimensional disassembled structural diagram of the photovoltaic structure of this utility model;
[0020] In the diagram: 1. Base; 2. Water tank; 3. Protective structure; 301. Protective pad; 302. Flange; 303. Snap ring; 304. Bolt; 4. Heating structure; 401. Inner tank; 402. Electric heating tube; 403. Partition plate; 404. Solenoid valve; 5. Photovoltaic structure; 501. Frame; 502. Water pipe; 503. Heat collector plate; 504. Photovoltaic-thermal integrated module; 505. Controller; 506. Battery. Detailed Implementation
[0021] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] Example
[0023] like Figures 1 to 4 As shown, a photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function includes:
[0024] The base 1 has a protective structure 3 at the center of its upper surface, a water storage tank 2 at the center of the upper surface of the protective structure 3, a heating structure 4 on the inner wall of the water storage tank 2, a photovoltaic structure 5 at the lower center of one side wall of the base 1, a water inlet at the rear center of the upper surface of the water storage tank 2, and a drain at the upper center of the front surface of the water storage tank 2. Both the water inlet and the drain are equipped with ball valves at their respective center points.
[0025] In this embodiment, the protective structure 3 includes a protective pad 301, which is fitted onto the center of the upper end face of the base 1. The water storage tank 2 is located at the center of the upper end face of the protective pad 301. A retaining ring 303 is provided at both the front and rear ends of the center of the upper end face of the water storage tank 2. Flanges 302 are provided at the front and rear ends of both sides of the upper end face of the base 1 and at the center of the lower end face of the two retaining rings 303. Bolts 304 are provided at the center of the upper end face of the two retaining rings 303. One end of each of the four bolts 304 passes through the upper end face of the two upper flanges 302 and the lower end face of the two lower flanges 302, respectively, and is threadedly connected to the lower flanges 302. 2. Inside, the protective pad 301 and the two retaining rings 303 are both made of rubber. The protective pad 301, made of soft and elastic rubber, can play a role in shock absorption and cushioning, preventing damage to the water storage tank 2 due to external vibrations and impacts. Furthermore, by placing the two retaining rings 303 on the water storage tank 2 and fixing them with bolts 304 through the flange 302, the water storage tank 2 is firmly fixed on the base 1, ensuring the stability and integrity of the equipment during the photothermal conversion process. This prevents the normal operation of the photovoltaic-thermal integrated water heater from being affected by factors such as shaking and displacement, and ensures that components such as the photovoltaic-thermal integrated module 504 and the collector plate 503 can receive sunlight normally and achieve optimal working efficiency.
[0026] In this embodiment, the heating structure 4 includes an inner liner 401, which is fitted onto the inner wall of the water storage tank 2. A partition 403 is provided at the center of the inner liner 401, and a solenoid valve 404 is provided at the center of the front end face of the partition 403. Electric heating tubes 402 are provided at the front and rear of the center of the inner liner 401. The inner liner 401 is made of stainless steel. The partition 403 separates the interior of the water storage tank 2 for storing low-temperature water and high-temperature water. When heating is required, the solenoid valve 404 is opened to allow the water inside the water storage tank 2 to circulate. The water inside the water storage tank 2 is then heated by the electric heating tubes 402. The electric heating tubes 402 generate heat after obtaining electrical energy through the photovoltaic structure 5, which heats the water around the tubes, thereby raising the water temperature of the entire inner liner 401 and realizing the function of heating the water inside the water storage tank 2.
[0027] In this embodiment, the photovoltaic structure 5 includes a frame 501, which is located at the lower center of one side wall of the base 1. A water pipe 502 is located at the lower center of the frame 501. A heat collector plate 503 is located inside the frame 501 on the upper surface of the water pipe 502. A photovoltaic-thermal integrated module 504 is located at the center of the upper surface of the heat collector plate 503. A controller 505 is located at the front center of the lower surface of the frame 501, and a battery 506 is located at the rear center of the lower surface of the frame 501. When sunlight shines on the photovoltaic-thermal integrated module 504, the photovoltaic-thermal integrated module 504 is preferentially used to heat the low-temperature water. Simultaneously, the controller 505 processes and stores the DC power generated by the photovoltaic-thermal integrated module 504 in the battery 506, waiting for the water in the storage tank 2 to be stored. Once the temperature rises to a certain level or the battery 506 is full, the controller 505 will activate photovoltaic electric heating to further raise the hot water to the target temperature. During the day when solar radiation is low and the target temperature cannot be reached, or at night when the hot water is partially used, the controller 505 will use the electrical energy stored in the battery 506 to heat the hot water in the water storage tank 2 in staggered shifts to raise the temperature and increase the hot water supply capacity. The solar collector 503 absorbs solar radiation heat. After the solar radiation passes through the solar collector 503, the heat is absorbed. The water in the water pipe 502 absorbs heat, its temperature rises, its density decreases, and it flows upward to the water storage tank 2. By continuously transferring the absorbed heat to the water storage tank 2, and simultaneously replenishing the water storage tank 2 with a lower temperature medium, the cycle continues to collect heat.
[0028] Implementation plan: When sunlight shines on the photovoltaic-thermal integrated module 504, the photovoltaic-thermal integrated module 504 is used first to heat the low-temperature water through photothermal conversion. At the same time, the DC power generated by the photovoltaic-thermal integrated module 504 is stored in the battery 506 through the controller 505. After the water in the water tank 2 rises to a certain temperature or the battery 506 is full, the photovoltaic electric heating is activated through the controller 505 to further raise the hot water to the target temperature. When the solar radiation is low during the day and the set target temperature cannot be reached, or when hot water is used at night, the electrical energy stored in the battery 506 is used through the controller 505 to heat the hot water in the water tank 2 in a staggered manner to raise the temperature and improve the hot water supply capacity.
[0029] The interior of the water storage tank 2 is divided into different areas by partitions 403 for storing low-temperature water and high-temperature water. In the initial state, the water in each area maintains a relatively stable temperature stratification state, with low-temperature water near the inlet and high-temperature water near the outlet, ensuring that the relatively high-temperature hot water can be supplied to the user through the outlet. When electric heating is required, the solenoid valve 404 is opened, and the water in the separated areas begins to flow together. The cold water and hot water mix into a state to be heated. This process breaks the original stratification state, so that the water in the entire inner tank 401 is in a mixed state of water to be heated.
[0030] The electric heating element 402 operates using electrical energy provided by the photovoltaic structure 5. After the photovoltaic structure 5 converts solar energy into electrical energy, it is processed by the controller 505 and partially stored in the battery 506 to power the electric heating element 402. Once the electric heating element 402 receives electrical energy, it begins to heat up. It preferentially heats the water around the electric heating element 402. Due to the principle of heat transfer, the heated water rises in temperature and becomes less dense, while the surrounding water, which is relatively colder and denser, sinks to replenish it, forming a natural convection circulation. Under this circulation, the heat near the electric heating element 402 is rapidly transferred to the water in the entire inner tank 401, thereby gradually increasing the water temperature in the entire inner tank 401. As the water temperature in the inner tank 401 continues to rise, the water in the storage tank 2 is heated, ensuring that the system provides hot water to the user.
[0031] In addition, the protective pad 301 is made of rubber, which is soft and elastic, and can play a role in shock absorption and cushioning, preventing the water storage tank 2 from being damaged by external vibrations and impacts. Furthermore, by placing two retaining rings 303 on the water storage tank 2 and fixing it with bolts 304 through the flange 302, the water storage tank 2 is firmly fixed on the base 1, ensuring the stability and integrity of the equipment during the photothermal conversion process. This prevents the normal operation of the photovoltaic-thermal integrated water heater from being affected by factors such as shaking and displacement, and ensures that components such as the photovoltaic-thermal integrated module 504 and the collector plate 503 can receive sunlight normally and achieve optimal working efficiency.
[0032] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function, characterized in that, include: The base has a protective structure at the center of its upper surface, a water storage tank at the center of the upper surface of the protective structure, a heating structure on the inner wall of the water storage tank, and a photovoltaic structure at the lower center of one side wall of the base. The protective structure includes a protective pad, which is fitted onto the center of the upper end face of the base. The water storage tank is located at the center of the upper end face of the protective pad. There are retaining rings at the front and rear of the center of the upper end face of the water storage tank. Flanges are provided at the front and rear of both sides of the upper end face of the base and at the center of the lower end face of the two retaining rings. Bolts are provided at the center of the upper end face of the two retaining rings at the top.
2. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 1, characterized in that, The heating structure includes an inner tank, which is fitted onto the inner wall of the water storage tank. A partition is located at the center of the inner tank, and a solenoid valve is located at the center of the front end of the partition. Electric heating tubes are located at the front and rear of the center of the inner tank.
3. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 1, characterized in that, The photovoltaic structure includes a frame, which is located at the lower center of one side wall of the base. A water pipe is located at the lower center of the frame. A heat collection plate is located inside the frame on the upper end of the water pipe. A photovoltaic-thermal integrated module is located at the center of the upper end of the heat collection plate. A controller is located at the front center of the lower end of the frame. A battery is located at the rear center of the lower end of the frame.
4. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 1, characterized in that, One end of each of the four bolts passes through the upper end face of the two upper flanges and the lower end face of the two lower flanges, respectively, and the ends of the bolts are threaded and rotatably connected to the inside of the two lower flanges.
5. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 1, characterized in that, The protective pad and the two retaining rings are both made of rubber.
6. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 2, characterized in that, The inner liner is made of stainless steel.
7. A photovoltaic-thermal integrated water heater with staggered-time energy storage and heating function according to claim 1, characterized in that, The water tank has an inlet located at the rear center of the upper surface and a drain located at the upper center of the front surface. Both the inlet and drain have ball valves at their respective center points.