496 results about "Solar water" patented technology

The invention belongs to the technical field of water treatment, and particularly relates to a solar water evaporator and a preparation method and application thereof. According to the solar water evaporator provided by the invention, by using the carbon-based photo-thermal functional materials such as the carbon nanotubes, the micron porous hydrogel and the porous salt-inhibiting mineral powder, an efficient water transmission path and a steam escape path can be provided so as to improve the evaporation efficiency of the solar water evaporator; the porous salt inhibition mineral powder such as diatomite is doped to realize the porous physical salt inhibition mechanism and the surface charge repulsion effect of the mineral powder to effectively inhibit the salt, in addition, through the design of the conical structure with the height-diameter ratio being equal to 1.25, the automatic falling of the surface salt is effectively promoted through the gravity effect, the condition that the salt crystals are difficult to block the pore channels is reduced, and the service life is prolonged. And the evaporation rate stability of the solar water evaporator is improved, so that the technical problem of lack of a high-performance solar water evaporator in the prior art is solved.

The invention discloses a method for improving photo-thermal conversion efficiency of a photo-thermal material under large-range light intensity, the photo-thermal material and a solar heat collector, and belongs to the field of solar evaporation water treatment. According to the technical scheme, the method comprises the steps that polyaniline particle-loaded carbon aerogel is prepared, the light intensity range is greatly widened to 10 sunlight intensities or above through a Fresnel lens, the corresponding relation between the material surface water evaporation rate and the temperature change is established, and the energy loss is reduced to the maximum extent by adding a foam side heat insulation layer; and the water evaporation rate of the photo-thermal material is improved. The method is applied to the aspect of solar water evaporation, and the problem that the water evaporation rate is low in an existing solar evaporation method is solved.

The invention discloses a water level and water quality dynamic monitoring management system and a water level and water quality dynamic monitoring management method, and particularly relates to the technical field of water level and water quality monitoring. And selecting an LSTM neural network, an RANSAC or a hybrid compensation algorithm thereof through a decision mechanism to carry out data correction. Meanwhile, an anomaly detection model is deployed at an edge node, and the model threshold is dynamically adjusted to improve the mutation recognition accuracy. And the cloud end constructs a hydrodynamic force-water quality coupling prediction model through multi-source data fusion to realize early warning of ecological risk events. The system is matched with solar energy-hydraulic power dual-mode energy supply and a LoRaWAN + 5G hybrid communication network, and is suitable for long-period automatic operation in an area without commercial power. The method has the advantages of intelligent data processing, adaptive compensation algorithm, flexible system deployment and the like, and is suitable for continuous monitoring and dynamic management of reservoirs.

The invention discloses an energy efficiency improving system for a shallow buried pipe heat exchanger. A closed or semi-closed heat storage area unit is arranged in a surrounding mode through area heat insulation plates. The heat storage area unit comprises a plurality of heat storage wells, a plurality of shallow water lifting wells, a plurality of deep water lifting wells, a plurality of solar water heaters, a heat storage water tank, a plurality of U-shaped vertical buried pipes and a ground source heat pump machine room; the buried depth of the regional heat insulation plate is arranged in soil of an earth crust constant temperature zone and penetrates through an earth crust daily variable temperature zone and an earth crust annual variable temperature zone from top to bottom, the buried depth H of the regional heat insulation plate is larger than or equal to H2 + 0.5-1 m, and H2 is the depth of the annual variable temperature zone; the heat storage well is of an inner and outer sleeve type hollow structure provided with a plurality of horizontal branch pipes shaped like a cross or a Chinese character'jing ', and the horizontal branch pipes are arranged in soil of a crustal annual variable temperature zone and a constant temperature zone. The buried depth H of the upper horizontal branch pipe is greater than or equal to H1 + 0.5-1m, and the buried depth H of the lower horizontal branch pipe is greater than or equal to H2 + 0.5-1m; h1 is the daily variable temperature zone depth, and H2 is the annual variable temperature zone depth.

The invention relates to the technical field of cluster operation, maintenance and fault diagnosis of a solar water heating system, and discloses a cluster operation, maintenance and fault diagnosis system of a solar water heating system based on digital twinning. The operation, maintenance and diagnosis system comprises a sensing terminal, a multi-source data processing and transmission module, a cluster operation and maintenance management module, a fault diagnosis module and a fault early warning module, and the sensing terminal comprises a data acquisition module, a radar integration module, a satellite positioning module, a Lora communication module and a direct current power supply module. The multi-source data processing and transmission module comprises an edge preprocessing engine and a protocol conversion gateway; the fault early warning module comprises a background server early warning unit and a maintenance information distribution unit; the data acquisition module comprises a temperature sensor, a flow meter, a pressure sensor and an irradiance instrument; through the system, the fault identification accuracy and the fault maintenance efficiency of the solar water heater can be improved.

The invention discloses a wall-mounted greenhouse solar water circulation heat storage device, and relates to the technical field of water circulation heat storage, the wall-mounted greenhouse solar water circulation heat storage device comprises a shell, a silk screen arranged on the back surface of the inner wall of the shell, an air blowing assembly arranged on the back surface of the shell and used for blowing out heat flow, and a storage battery arranged on the top surface of the shell, the storage battery is used for storing electric energy converted from solar energy, the first concentric-square-shaped frame is arranged in the middle of the interior of the shell, the circulating assembly is arranged in the first concentric-square-shaped frame and used for circularly heating water, the second concentric-square-shaped frame is fixed to the front face of the first concentric-square-shaped frame, and the shaft fan is fixed to the back face of the second concentric-square-shaped frame. The shaft fans are rotationally mounted at the top end and the bottom end of the interior of the second concentric-square-shaped frame correspondingly, airflow heated by the bent pipes is driven through the shaft fans, and therefore the problem that heat distribution in a greenhouse is unbalanced due to the fact that hot air blown out by the water circulation heat storage device is not uniform is solved.

The invention discloses a bionic tree-shaped evaporator based on hollow microtubes and application thereof, and relates to the technical field of solar water treatment.The bionic tree-shaped evaporator is prepared through the following steps that bacterial cellulose hybrid spinning solution serves as shell layer fluid, absolute ethyl alcohol serves as core layer fluid, the shell layer fluid and the core layer fluid are co-extruded into an ethyl alcohol coagulating bath, curing is conducted, washing is conducted with ethyl alcohol and deionized water in sequence to be neutral, and drying is conducted to obtain the bionic tree-shaped evaporator. A hollow hybrid microtube is obtained; and arranging and fixing the plurality of hollow hybrid microtubes on a bracket according to a tree-shaped branch structure to obtain the bionic tree-shaped evaporator. The bionic tree-shaped evaporator prepared by the invention has excellent mechanical flexibility, salt tolerance and purification efficiency, and provides a new material and a new scheme for efficient and sustainable solar seawater desalination and wastewater treatment.

The utility model relates to the technical field of hot water tanks, in particular to a photovoltaic phase change heat storage water tank which comprises a shell and an inner container, the inner container is fixedly connected in the shell, a baffle is fixedly connected in the inner container, and a phase change heat storage water tank is arranged in the space, located above the baffle, in the inner container. An electric heating water tank is arranged in the space, located below the baffle, in the inner container, the phase change water storage tank is filled with phase change heat storage balls, the upper end of the shell is fixedly connected with a ball discharging pipe opening used for adding the phase change heat storage balls into the inner container, two sets of electric appliance openings are formed in the side face of the shell, and a variable-frequency direct-current photovoltaic heating pipe and an alternating-current heating pipe are fixedly connected into the two sets of electric appliance openings respectively; direct current generated by the photovoltaic assembly directly drives the variable-frequency direct-current photovoltaic heating pipe to heat water in the electric heating water tank, the phase-change heat storage ball stores energy, heat energy is released when the temperature of hot water is insufficient, water in the inner container is heated, and the solar water heater can be stably used under various weather conditions and is good in heat energy storage effect.

The invention provides an unpowered phase change vaporization flat plate solar water heater, and belongs to the technical field of flat plate collectors. The unpowered phase change vaporization flat plate solar water heater comprises a heat preservation water tank and a heat collection flat plate, heat conduction water is injected into an inner cavity of the heat preservation water tank, a heat exchange pipe transversely penetrates through the heat preservation water tank, a closed red copper straight pipe and a closed header flow channel are fixed in the heat collection flat plate, and phase change heat conduction media easy to vaporize are injected into the red copper straight pipe and the header flow channel. A heat dissipation head inserted into the header runner is arranged at the end of the red copper straight pipe, a condensation head protruding upwards and penetrating out of the heat collection flat plate is arranged in the middle of the header runner, a heat absorption head connected with the inner cavity is arranged on the heat preservation water tank, and a heat exchange assembly for heat exchange is connected between the condensation head and the heat absorption head. The red copper straight pipes and the collecting pipe flow channels in the heat collecting flat plates are of a closed structure, phase change heat-conducting media in the heat collecting flat plates do not make contact with the outside, scaling is avoided, the heat collecting flat plates are resistant to low temperature, and heat-conducting water in the heat preservation water tank is not afraid of the influence of the low-temperature environment.

The invention provides a solar water desalination device and method. The solar water desalination device comprises a water collecting cylinder, multiple layers of evaporators are arranged in the water collecting cylinder, distillation plates are arranged among the evaporators, the distillation plates are sleeved with supporting rods, and the supporting rods are connected with the evaporators; a first collecting barrel is arranged on the evaporator, a foam rod is arranged in the first collecting barrel, the foam rod is sleeved with an evaporation column, an evaporation film is arranged at the top end of the first collecting barrel, heat insulation foam is arranged below the evaporation film, and a heating unit is arranged below the first collecting barrel; the outer diameter of the first collecting cylinder is smaller than the inner diameter of the water collecting cylinder. According to the solar water desalination device and method, the evaporation surface of the evaporation device is enlarged, and the water desalination flux is improved. Condensation heat is utilized to the maximum extent, and desalination efficiency is improved. Electric heating assists evaporation, and water desalination can still be continuously carried out under the condition of no light.

The invention discloses an oxide semiconductor plane p / n superstructure and a preparation method thereof. According to the method, a latticed mask is formed on the surface of an oxide thin film based on a photoetching process, O2 atmosphere annealing (100-300 DEG C, 15-40 min) is combined, the local oxygen vacancy concentration of a mask covering area and an exposed area is precisely regulated and controlled, and precise in-situ conversion of a p type (oxygen-rich area) and an n type (oxygen-poor area) in a homogeneous material is achieved. The planar p / n superstructure breaks through the strict limitation of a traditional vertical multi-junction structure on material doping and interface quality, the width of a depletion region is expanded to the micron order through the p / n homojunction arrays alternately distributed in the plane, and the bulk recombination effect of photon-generated carriers is remarkably inhibited. According to the method, an innovative technical route of photoetching-assisted in-situ construction of the planar multi-junction photoelectrode is created, the method has the advantages of interface atomic-scale lattice matching, simple process, high compatibility, accurate and controllable space charge distribution and the like, and a technical foundation is laid for non-assisted solar water decomposition, research and development of self-driven optoelectronic devices and the like.

A heating system for use in the solar powered heating of water. In one embodiment, the heating system is used in conjunction with a solar water farm to desalinate water. The water farm can be utilized on a variety of scales and can be applied to agricultural farms for large scale reclamation of deserts.

The invention discloses a manufacturing method of an offshore comprehensive energy system and equipment, and particularly relates to the technical field of ocean energy development, which comprises the following steps: constructing a medium-low water head pumped storage hydropower station connected with a power grid in the ocean; a tidal energy reservoir is built in the ocean, and a tidal energy connecting dam is built between the tidal energy reservoir and the pumped storage hydropower station; a solar water pumping device, a wind power water pumping device and a wave energy water pumping device are respectively arranged at preset positions of the tidal energy reservoir, the pumped storage reservoir dam of the pumped storage hydropower station and the tidal current energy connecting dam; multi-energy complementation and unified energy storage are achieved, tidal energy, tidal current energy, solar energy, wave energy and wind energy are integrated into the pumped storage reservoir through respective water pumping devices, intermittent and fluctuating ocean energy is uniformly converted into stable gravitational potential energy to be stored, and then concentrated power generation is conducted through the medium-low water head pumped storage power station. The problem of unstable power supply is solved, and the energy storage cost is reduced.

The invention discloses a divided water tank device for an internal heat exchanger of a split type solar water heater. Butt welding is carried out by utilizing an end enclosure of a stainless steel confined water bank inner bag; the end enclosure is used as the heat exchanger to play the role of a water tank partition board; the water tank is divided into independent divided cavities; the heat exchanger is sealed with the inner bag of the water tank; the adjacent cavity bodies communicate with each other via draught tubes; the medium circulation and the medium supplement, namely unconfined running of the heat exchanging part, are carried out safely and reliably via an upper circulating pipe and a heat collecting part; and the device can fully improve heat energy transformation and reduce heat loss.

To provide a photoelectric conversion element that has light resistance, heat resistance, and infrared light transmittance, and has excellent conversion efficiency.SOLUTION: A photoelectric conversion element includes a first substrate, a first electrode, a hole transport layer, a photoelectric conversion layer, an electron transport layer, and a second electrode, in this order. The first electrode includes a metal nanowire, and the hole transport layer includes a polymer of a hole transport material.SELECTED DRAWING: Figure 1

The invention discloses a condensation solar cement calcining kiln with a heat storage function and a working method thereof, and belongs to the field of energy and building material production, the condensation solar cement calcining kiln comprises a solar condenser, a cement calcining kiln, a solid heat storage material, a circulating heat release unit and a system control device, the solar condenser focuses solar energy through a daylighting opening of the cement calcining kiln, and cement clinker sintering is achieved; low-temperature gas discharged from the calcining kiln enters the raw material preheating tank to provide raw material preheating heat; the solid heat storage material in the kiln cavity absorbs sunlight and raw material radiant heat to store heat; when solar irradiation fluctuates, the circulating heat release unit enables air to exchange heat with a heat storage material, and high-temperature air required by continuous calcination is provided; the system control device regulates and controls the position, temperature and reaction process of the kiln body. Through integration of light condensation, heat absorption and heat storage, calcination of the zero-carbon cement is achieved, high-temperature CO2 gas and high-temperature air in the calcination process can be used for preheating raw materials, and gradient utilization of solar energy is achieved.

The utility model discloses a split type refrigerator structure, which is characterized in that a first box body and a second box body are detachably connected, so that a user can independently carry the first box body for storing articles according to requirements, and does not need to carry the whole refrigerator structure. Therefore, the portable solar water heater is lighter and easier to carry under the conditions of outdoor activities, travel or limited space; the air cooling system is placed in the second box body, so that the storage space in the first box body can be maximized; due to the split type design, any part can be cleaned or maintained more easily, if the air cooling system goes wrong, only the second box body needs to be detached for maintenance, and the first box body for storing food does not need to be influenced; and the independent air cooling system can better adjust the temperature in the storage cavity, so that the freshness of the food is ensured. In addition, the first box body and the second box body which are different in size can be freely selected according to actual requirements, and therefore the optimal space utilization and energy consumption ratio are achieved.

The invention relates to a Janus structure wood-based solar water and electricity co-production evaporator based on metal organic framework modification and a preparation method of the Janus structure wood-based solar water and electricity co-production evaporator, and belongs to the technical field of solar interface evaporation materials. In order to solve the problem that an existing wood-based solar evaporator is poor in water photovoltaic power generation and electricity generation performance, the invention provides a preparation method of a Janus structure wood-based solar water and electricity co-production evaporator based on metal organic framework modification. The preparation method comprises the following steps: delignification treatment, preparation of a metal organic framework modified wood-based evaporator substrate and preparation of the Janus structure wood-based solar water and electricity co-production evaporator. The MOF is used for reducing the evaporation enthalpy of water, promoting the high evaporation rate and enhancing ion transmission to strengthen water photovoltaic power generation, the stable high evaporation performance is maintained by means of the Janus structure, the requirements of sustainable production of fresh water and water photovoltaic power generation can be met, the efficiency and environment problems in fresh water resource and energy production are effectively solved, and the application prospect is wide. And a new solution is provided for sustainable development.

The invention discloses a water heater switching method and device, a controller and a storage medium. The method comprises the steps that when the solar water heater supplies water to a user at the current water supply moment, the water storage temperature and the water outlet temperature of the solar water heater at the current water supply moment are obtained through a first temperature sensor and a second temperature sensor correspondingly; according to the water storage temperature and the water outlet temperature of the solar water heater at the current water supply moment, the reference temperature of the solar water heater at the current water supply moment is determined; and if the reference temperature of the solar water heater at the current water supply moment is smaller than the preset reference temperature, the solar water heater is controlled to stop supplying water to the user at the next water supply moment, and meanwhile the gas water heater is controlled to be started at the next water supply moment to supply water to the user. The solar water heater and the gas water heater can be automatically switched, manual operation of a user is not needed, a large amount of time and energy are saved, meanwhile, potential safety hazards can be eliminated, and safe use of the user is facilitated.

The invention discloses a vacuum glass tube solar water heater with an internal circulation heat exchange tube, which relates to the field of solar heat utilization, and comprises an energy storage water tank, a heat insulation box, an internal circulation heat exchange tube, a heat exchange tube and a heat exchange tube, the multiple vacuum glass tubes are arranged on the two sides of the heat preservation box, the multiple vacuum glass tubes are arranged at equal intervals from top to bottom, and the vacuum glass tubes are fixedly connected with the outer side of the heat preservation box; according to the vacuum glass tube solar water heater with the internal circulation heat exchange tubes, the bottom-layer vacuum glass tubes are transversely communicated through the first flow guide tubes, the top-layer vacuum glass tubes are transversely communicated through the second flow guide tubes, and the longitudinally adjacent vacuum glass tubes are connected in series through the first communication guide tubes; the high-temperature water rises and the low-temperature water sinks according to the natural convection principle driven by temperature difference, so that the water flow exchange speed between the vacuum glass tubes and on the left and right sides of the vacuum glass tubes on the same layer is accelerated, the water temperature in the system rises faster and more uniformly, and the heat efficiency is remarkably improved.

An improved solar water distillation system which is effective for processing supersaturated brine commonly used in lithium mining comprising: a flushing system for controlling and substantially minimising cross-contamination of condensate stream(s) and salt deposits and / or treatment liquid, having a first flushing station integrated at a first location on a frame part of a solar still upstream from a treatment liquid separator, and including transfer means; wherein liquid from a liquid source is transferred to the first flushing station by the transfer means at a predetermined rate effective for dislodging and displacing solid salt deposits on the solar still.

The utility model relates to the technical field of radiation air conditioners, in particular to a radiation heating system based on a multi-split unit. The system comprises an outdoor heat source module, a fluorine water heat exchange module and an indoor tail end module. The outdoor heat source module comprises an outdoor main machine of the multi-split unit and a refrigerant circulating pipeline; the fluorine water heat exchange module comprises a fluorine water plate heat exchanger, an expansion valve, a circulating water pump, a radiation tail end water supply pipeline and a radiation tail end water return pipeline; the indoor tail end module comprises a radiation tail end water segregator, a radiation tail end water collector, a fan coil and a radiation plate. A solar auxiliary preheating loop is further integrated, comprises a solar heat collector and a solar water tank, and is used for preheating a water source and reducing operation time and energy consumption of the multi-split air conditioning system. According to the system, the problem of heating discontinuity caused by the heating initial stage and the defrosting mode is solved through the modes of solar preheating, radiant heating and the like, the indoor thermal comfort is improved, and the energy efficiency ratio of the system is increased.

The present invention relates to the field of solar energy storage technology, specifically a solar energy storage device, including a solar water heater main body, the solar water heater main body including a bracket, a water tank and a heat collecting pipe connected to the water tank are arranged on the bracket, and also includes a hollow rotating shaft rotatably arranged on the water tank. The device drives a stirring blade to rotate with the help of a driving component to achieve mixing of the water in the water tank. During the rotation of the stirring blade, the angle switching component is used to drive the stirring blade to switch the angle deflection, so as to promote the upper water body of the water tank to flow from left to right and the lower water body to flow from right to left, thereby forming a circulating convection. This design can effectively avoid the stratification of cold and hot water in the water tank, while ensuring that the water temperatures at the left and right ends of the water tank tend to be consistent, significantly improving the balance of the water temperature in the water tank. In addition, the rotation process of the stirring blade can also reduce the possibility of scale condensation.

1. The name of the design product: solar water treatment equipment. 2. The use of the design product: for solar water treatment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention relates to a solar heating system (100), characterized in that it comprises: a solar water heater with integrated collector and storage (50, 51), including a water storage tank (50a, 51a) with a cold water inlet (50b, 51b) and a hot water outlet (50c, 51c), and a transparent surface (50d, 51d); a vacuum tube solar collector (40, 41), including a head collector (40a, 41a) with a cold heat transfer fluid inlet (40b, 41b) and a hot heat transfer fluid outlet (40c, 41c), and a plurality of vacuum tubes (40d, 41d), connected to the head collector (40a, 41a), containing a heat transfer fluid. The vacuum tubes (40d, 41d) extend above the transparent surface (50d, 51d), and the solar water heater with integrated collector and storage (50, 51) includes an internal heat exchanger (60, 61). Figure for the abstract: Figure 1

The utility model discloses a low-carbon sunny and sunny type sunlight greenhouse, which belongs to the technical field of indoor planting and comprises an assembly type sunny and sunny greenhouse, the sunny greenhouse and the sunny greenhouse comprise a shared partition wall and supporting frameworks respectively extending to the south direction and the north direction from the top of the partition wall, and a heat collecting system is mounted in the sunny greenhouse. A heat storage system and a temperature and CO2 adjusting system are installed in the shady shed and the sunny shed, and the heat collection system comprises waste heat recovery equipment, a solar water heater and a heat storage device, wherein the waste heat recovery equipment and the solar water heater are installed above the sunny shed, and the heat storage device is arranged on a sunny side partition wall. The heat storage system comprises underground temperature storage devices and a water storage tank, wherein the underground temperature storage devices are arranged under the shady shed and the sunny shed respectively and connected with the waste heat recovery equipment, and the water storage tank is arranged in the shady shed. The temperature and CO2 adjusting system comprises a temperature and humidity sensor, an oxygen sensor and a CO2 sensor which are arranged in the shady shed and the sunny shed, a temperature sensor arranged in the water storage tank and the heat dissipation device, a plurality of fans arranged at the upper part of the partition wall and a plurality of ventilation windows arranged at the lower part of the partition wall.

The utility model relates to the technical field of agricultural irrigation equipment, in particular to an agricultural irrigation water diversion device which comprises a water pressing well body, a water storage tank is movably inserted in the water pressing well body, a hole is formed in the water storage tank, a limiting frame is arranged at the hole, and a water taking assembly is welded to the back face of the water pressing well body. The pressurized-water well body comprises a barrel, a hole is formed in the middle of the front end of the barrel and communicated with a first communicating pipe, a hole is formed in the upper portion of one side of the barrel and communicated with a second communicating pipe, and the water outlet end of the second communicating pipe is matched with the mounting position of a limiting frame on the water storage tank. The water taking assembly comprises a frame body, a groove is formed in the frame body, a connecting rod is rotationally installed on the frame body, a screw is welded to the rear end of the connecting rod, and a holding rod is fixedly installed at the rear end of the connecting rod through the screw. The solar water heater has the advantages that the solar water heater can operate without external power supply and has a water storage function.

A solar power system which includes an electric engine power generator assembly to produce and store electrical energy as needed, when solar energy is not available or the level of solar energy is insufficient, to maintain a full or substantially full stored power charge level.

The utility model belongs to the technical field of solar water heaters, and particularly discloses a solar water heater installation support which comprises a solar water heater body formed by connecting a water tank, a heat collecting pipe, a supporting rod and a tow bar, the two sides of the water tank are connected through a supporting hook in a bearing mode, the supporting hook is backwards connected with a supporting plate, and the supporting plate is installed on the support. The support comprises optical shafts penetrating through the two sides of the supporting plate, the tops of the optical shafts are connected with a top plate, the bottoms of the optical shafts are connected with the rotating seat, and a lead screw penetrates through the center of the top plate downwards and is in threaded connection with the center of the supporting plate; sliding rails are arranged on the two sides of the rotating base, rollers are installed in the sliding rails and connected to connecting shafts through bearings, and the ends of the connecting shafts are in threaded connection with threaded holes formed in the two sides of the mop rod. The rotating seat is installed on the base, and a rotating driving mechanism is arranged in the base and connected with the center of the bottom of the rotating seat. The angle of the heat collecting pipe of the solar water heater can be adjusted according to the actual environment condition, and the solar energy absorption efficiency of the water heater is ensured.

The utility model discloses a roof solar water heating system which comprises a flat-plate solar collector, an air source heat pump unit, a heat pump heating circulating water pump, a pipeline system and a heat preservation water tank. The flat-plate solar heat collectors are fixed on a roof foundation through a support, the flat-plate solar heat collectors are arranged in multiple rows and are connected in series through heat collector water pipes, and the two ends of each flat-plate solar heat collector are connected to the heat preservation water tank. The air source heat pump unit and the heat pump heating circulating water pump are connected to the heat preservation water tank through a circulating water pipe. The cold water supply pipe supplements cold water to the heat preservation water tank, the hot water supply pipe conveys hot water in the heat preservation water tank to all water consumption ports, and the hot water return pipe recovers unused hot water to the heat preservation water tank. The solar water heater can solve the problems that the water temperature of the solar water heater rises slowly and is unstable, residual hot water cannot be effectively utilized, and energy is wasted due to electric heating in cloudy and rainy days.