296results about "Collector thermal insulation" patented technology

The invention relates to the technical field of heat storage water tanks, in particular to a heat storage water tank with a good heat preservation effect, which comprises a water storage tank, a heat preservation structure is arranged on the inner side of the water storage tank, a heat storage structure is connected to the bottom side of the water storage tank, and a conversion structure is connected between the heat storage structure and the water storage tank. A positioning structure is connected between the water storage tank and the heat preservation structure, a supporting structure is arranged at the bottom of the water storage tank, an observation structure is arranged on the side face of the water storage tank, and a communicating hole is formed in the bottom of the water storage tank; the heat preservation capacity of warm water in the water tank can be improved through the heat preservation structure, damage to the heat collector caused by freezing can be avoided through the heat storage structure, the rotating position of the conversion pipe can be conveniently adjusted through the conversion structure, air pressure balance in the water storage tank can be guaranteed through the positioning structure, and adjustment is convenient.

The invention discloses a photovoltaic photo-thermal energy storage multi-element coupled all-weather self-adaptive building energy system and method, and belongs to the crossing field of solar comprehensive utilization and building energy saving. The system integrates a Fresnel lens, a frequency division film, a photovoltaic power generation unit, a thermoelectric power generation unit and a multi-temperature-zone phase change energy storage device, and the surface of the photovoltaic and thermoelectric unit is covered with an aerogel heat collection and insulation layer. Sunlight is focused by a Fresnel lens and then is separated into short-wave light and long-wave light by a frequency division film, and power generation waste heat is stored in a cascade mode through a phase change energy storage device; the intelligent control unit switches a heat supply season mode or a cold supply season mode according to seasons and energy consumption requirements. The system improves the solar spectrum utilization rate, achieves all-weather self-adaptive supply of electricity and heat of the building, is compact in structure, low-carbon and efficient, and is suitable for various building energy scenes.

The utility model relates to the technical field of water heaters, and discloses a pipeline anti-freezing device for an outdoor water heater, which comprises a water heater pipeline, the surface of the water heater pipeline is sleeved with a foam sleeve, the surface of the foam sleeve is sleeved with a heat preservation component, the surface of the heat preservation component is sleeved with a heating pipe, and the surface of the heating pipe is sleeved with a water inlet pipe. A cavity is formed in the inner wall of the heating pipe, an electric heating wire is fixedly arranged in the cavity, the surface of the heating pipe is sleeved with an aluminum foil layer, the surface of the aluminum foil layer is sleeved with a corrugated extension pipe, the surface of the corrugated extension pipe is sleeved with a waterproof film, and the surface of the waterproof film is sleeved with an A fixing ring. According to the pipeline anti-freezing device for the outdoor water heater, through the arrangement of the electric heating wire, the fixing ring A and the fixing ring B are installed on the outer surface of the waterproof film and communicated with an external power source, the temperature sensor senses the external temperature, and when the temperature is low, the temperature controller controls the electric heating wire to heat, heat the pipeline and melt ice, so that the pipeline of the water heater is prevented from being frozen to crack.

Thermal energy storage systems and methods that include near-black body concentrated sunlight receivers disposed in thermal storage media for storing sunlight and extracting thermal energy for multiple end-use applications. The concentrated sunlight receivers are characterized by absorption of sunlight of at least 95%. The thermal energy storage systems are modular and transportable and can be scaled-up in capacity. Solar concentrators may be integrated with the thermal energy storage systems.

A heat collector includes a body including a hollow portion extending from a first end to a second end of the body and being a metal-extruded body having a light-receiving surface to receive sunlight, a pair of lids adjacent to the first end and the second end and covering the hollow portion, an inlet located in one of the pair of lids to allow a heating medium to enter the hollow portion, and an outlet located in one of the pair of lids to allow the heating medium to exit the hollow portion.

The invention discloses a solar heat utilization optimization method of a heat collector, heat collector equipment and a computer device. The method comprises the following steps: predicting radiation characteristics of suspended nanoparticles based on an artificial neural network model by utilizing a boundary element method; parameters of the heat collector are optimized through a genetic algorithm, and the radiation characteristics of the suspended nanoparticles are evaluated; constructing a heat collector structure optimized by the genetic algorithm in the finite volume method simulation framework, and verifying the rationality of parameters of the heat collector structure; preparing a ternary mixed nano suspension, and verifying the stability of the ternary mixed nano suspension; a heat collector device is prepared based on the ternary mixed nano suspension, a sensor network is arranged in the heat collector device to continuously collect data, the solar heat utilization rate of the heat collector device is determined according to the data, and the data is uploaded to an upper computer to be managed and analyzed. Optimization and performance improvement of the solar heat collector equipment are achieved, and the thermal performance of the heat collector equipment is improved.

To improve heat quantity acquired from a sunlight heat collection panel.SOLUTION: A sunlight heat collecting system 1 includes: a sunlight heat collection panel 2 that has a non-heat insulation part 2c causing convection heat transfer with surrounding air and transfers radiation heat from the sunlight and convection heat from the surrounding air to a heating medium M; a heating medium circulation line 4 for sending the heating medium M from a heating medium tank 3 that stores the heating medium M to the sunlight heat collection panel 2 and sending the heating medium M from the sunlight heat collection panel 2 to the heating medium tank 3; a heating medium flowing control mechanism 5 that performs at least either of switching between permission and prohibition of flowing of the heating medium M along the heating medium circulation line 4 or regulation of a flow rate of the heating medium M; and a control device 9. The control device 9 measures radiation heat input quantity Q1 to the sunlight heat collection panel 2, measures convection heat transfer quantity Q2 between the sunlight heat collection panel 2 and the surrounding air, and controls the heating medium flowing control mechanism 5 on the basis of the radiation heat input quantity Q1 and the convection heat transfer quantity Q2.SELECTED DRAWING: Figure 1

According to the solar cross-seasonal heat storage system, a heat storage water tank is provided with a cylindrical main tank body and an auxiliary tank body which is arranged at the bottom of the main tank body and is of an inverted cone structure, and the bottom of the heat storage water tank is provided with a conical wall face with a certain inclination angle so that fluid can be prevented from flowing; convective mixing between low-temperature water at the bottom of the heat storage water tank and high-temperature water in the upper middle of the heat storage water tank can be reduced, the internal convection effect strength is weakened, mixing of cold water and hot water is reduced, and the hot water yield can be increased. And moreover, the flow deflectors for reducing the water flow speed are arranged in the main tank body of the heat storage water tank, the water flow can be blocked by the flow deflectors, the flow speed is relatively reduced, the natural convection heat exchange intensity in the water tank is smaller, and the generated heat loss is smaller, so that the flow deflectors are beneficial to improving the heat storage efficiency of the heat storage water tank. The solar cross-seasonal heat storage system has the advantages of being high in heat storage efficiency and small in heat loss.

An integral type heat pipe heat exchanger solar heat absorption system comprises a heat absorption tower, a heat transmission pipeline, a heat transmission working medium, a working medium driving device and a heat storage device. The system utilizes a fused salt working medium to carry out heat transfer, and a heat absorber works by utilizing a heat pipe principle; through comprehensive utilization of a heat pipe principle and various solar radiation heat transfer enhanced technical measures and an integral heat pipe heat exchanger structure suitable for mounting of a heat absorption tower structure, the internal space of the heat absorption tower is fully utilized, so that the size or volume of the heat absorption tower is greatly reduced; and the manufacturing cost of manufacturing, transporting, mounting and the like of the heat absorption tower can be effectively reduced. The application of the integral heat pipe heat exchanger is also beneficial to reducing the temperature in the heat absorption tower or increasing the heat storage temperature, so that the heat efficiency of the system can be improved.

The invention discloses a solar heat storage water tank suitable for alpine regions and a solar heat collection system.The solar heat storage water tank suitable for the alpine regions comprises a tank body, a first plate, a second plate and a first heat storage assembly, and the tank body is provided with an inner cavity; the first plate and the second plate are arranged in the inner cavity to divide the inner cavity into a first chamber and a second chamber, one of the first plate and the second plate can move relative to the other to adjust the sizes of the first chamber and the second chamber, at least one of the first plate and the second plate is provided with a first hole and a first valve, the first hole is used for communicating the first chamber with the second chamber, and the second hole is used for communicating the second chamber with the first valve. The first valve is used for controlling opening and closing of the first hole; the first heat storage assembly is arranged in the first chamber, and the first heat storage assembly is provided with a shell and a phase change medium filled in the shell. The heat storage effect can be improved.

Solar thermal collector. The invention relates to a solar thermal collector (1) in the form of a panel (2) comprising a rear wall (3) and a peripheral wall (4) delimiting an enclosure (5) closed by a transparent front wall (6), within the enclosure (5) extending at least one tube (8) of a heat exchanger (9) through which a heat transfer fluid flows between at least one inlet (13) and at least one outlet (14). The rear wall (3) and the peripheral wall (4) are made of an expanded insulating material, within the enclosure (5) being provided at least one groove (7) of a cross-section fitted to accommodate a tube (8) of the exchanger (9). Figure for the abstract: Fig. 1

The utility model provides a solar heat collection device, and belongs to the technical field of heat collection devices. A solar heat collection device comprises a frame body, a solar heat collection device and a solar heat collection device, the copper pipe is fixedly connected to the support, and the two ends of the copper pipe extend out of the frame body; the heat insulation cotton is fixed in the frame body, a containing groove matched with the copper pipe is formed in the heat insulation cotton, and the containing groove penetrates through the heat insulation cotton so that the two sides of the heat insulation cotton can make contact with the copper pipe; the two heat absorption plates are fixed to the two sides of the heat insulation cotton respectively and make contact with the copper pipe; and the two transparent cover plates are fixed on the frame body, and the two transparent cover plates are respectively distributed on the outer sides of the two heat absorbing plates.

The utility model discloses a kind of energy storage systems, specifically in the energy storage technical field, including spherical water tank, spherical water tank is equipped with vortex heat exchanger, the inner end of vortex heat exchanger is communicated with connecting pipe, and another end of connecting pipe is communicated with the top of spherical water tank, the top of spherical water tank is penetrated with first conveying pipe, the top of first conveying pipe is communicated with first concentric cylinder, and first conveying pipe and the center tube of first concentric cylinder are directly communicated, first concentric cylinder is equipped with heat absorption tower shell, the top opening of heat absorption tower shell is inserted with second concentric cylinder, first concentric cylinder and second concentric cylinder are staggered and inserted and form flow channel by heat absorption tower shell axial flow to heat absorption tower shell side wall, first concentric cylinder is fixedly connected with heat absorption tower shell by skirt with bottom setting through-hole, the outer end of vortex heat exchanger is communicated with second conveying pipe, and second conveying pipe is communicated with the bottom of heat absorption tower shell, and the energy storage system is under the common heat preservation of heat preservation soil layer and heat preservation layer in soil, hot water can be heat preserved for several days.

The invention relates to a device (10) for converting solar energy into electrical energy and thermal energy, the device (10) comprising: a main body (12) having an upper side (14) which can be oriented towards the sun, an lower side (18) which can be oriented towards a building (16), and at least one lateral side (20) which is arranged between the upper side (14) and the lower side (18); a photovoltaic module (24) forming the upper side (14) for converting the solar energy into electrical energy; and a heat exchanger (28) having a fluid chamber (44) through which a thermal fluid (46) can flow, the fluid chamber (44) adjoining the photovoltaic module (24).

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.

The utility model relates to the technical field of solar water heaters, and discloses a solar water heater with a self-anti-freezing function, which comprises a water tank, the surface of the water tank is fixedly connected with a heat preservation mechanism, and the top of the water tank is communicated with a water pipe. According to the solar water heater with the self-anti-freezing function, through the arrangement of the heat preservation mechanism, the circulation mechanism and the temperature control mechanism, when the solar water heater is used, a ceramic fiber layer and a rock wool layer are arranged on the surface of the water tank, the heat preservation capacity of the water tank can be effectively improved, and in cold weather, a water pump on one side is started; the water pump pumps a water source in the water tank into the circulation tank for preheating, the heating piece is arranged in the circulation tank, the temperature controller controls the heating piece to reach the designated temperature, then the valve on one side is opened, hot water is input into the water tank again, on one hand, the water source can be secondarily heated, and on the other hand, the living water source in circulation is not prone to freezing. And the anti-freezing performance of the solar water heater is improved.

Disclosed is a cladding panel that collects and / or emits thermal energy, which comprises: a first panel (10); a second panel (20) with an extrados (21) adhered to an intrados (12) of the first panel (10), forming a leak tightseal, with a low-relief channel (40), the channel (40) being attached to the intrados (12) of the first panel (10) to form a conduit; an inlet connector (41) for heat-conducting fluid, connected to a first end of the channel (40); and an outlet connector (42) for heat-conducting fluid, connected to a second end of the channel (40), wherein the first panel (10) is made of calibrated laminated ceramic with a flat, smooth intrados and a flat, smooth extrados and has a uniform thickness of 3-6 mm, and the second panel (20) is made of waterproof heat-insulating plastic that is stable up to 120°C.

This invention provides a vacuum solar collector tube, comprising an outer vacuum tube, an inner vacuum tube, and a vacuum interlayer therebetween. The vacuum solar collector tube further includes: a solar energy collecting layer disposed on the outer surface of the inner vacuum tube, the solar energy collecting layer comprising a coated area and a non-coated area; and a movable covering unit comprising at least one movable insulating fin disposed outside the non-coated area. Through actual testing, the design of the coated and non-coated areas, as well as the insulating fins in the covering state, of this invention's vacuum solar collector tube effectively acts as a thermal barrier for the vacuum tube, significantly reducing the heat loss coefficient of the collector tube.

The zero-electricity photo-thermal heat collector comprises two-way vacuum heat collecting pipes, a mounting support, a photovoltaic blast header, a heat exchange header and a double-insertion header, the two-way vacuum heat collecting pipes are mounted among the photovoltaic blast header, the heat exchange header and the double-insertion header, and the two ends of the photovoltaic blast header and the two ends of the heat exchange header are connected through heat preservation air pipes to form an air circulation loop. A direct-current fan is arranged in the photovoltaic blast header and used for driving air to circularly flow, a copper pipe fin heat exchanger is arranged in the heat exchange header and connected with a tail end heat exchanger through a heat conduction liquid heat preservation pipe, a heat collection pump is arranged on the heat conduction liquid heat preservation pipe, and the heat collection pump drives heat conduction liquid to circulate between the heat exchange header and the tail end heat exchanger. And the direct-current fan and the heat collection pump are both powered by a photovoltaic panel. Photovoltaic power generation is used for completely replacing commercial power consumption, zero-power-consumption green operation is truly achieved, and meanwhile the solar water heater has the advantages of being high in heat efficiency, resistant to freezing, free of scaling, long in service life and capable of running autonomously.

The uniform heating solar reactor designed by combining energy flow distribution and absorption coating belongs to the field of solar thermal utilization. The internal temperature of the existing solar reactor is uneven, resulting in low reaction efficiency. The sunlight concentrated by the dish-type solar concentrator is partially irradiated to the surface of the foam ceramic through the quartz window, and the other part passes through the pores in the foam ceramic and is finally received by the ellipsoidal graphite sheet coated with the absorption coating. After absorbing the heat, the ellipsoidal graphite sheet heats the outer spherical surface of the foam ceramic adjacent to the ellipsoidal graphite sheet through heat conduction, so that the temperature of the foam ceramic is uniform; according to the energy flow distribution results of the numerical simulation of computational fluid dynamics, the foam ceramic adopts a double-layer nested "double ellipsoidal surface" geometric structure with long and short axes perpendicular to each other to alleviate the heat concentration in the front area and enhance the uniformity of the circumferential temperature distribution; the raw gas inlet and gas product outlet are respectively opened on the upper and bottom of the ellipsoidal shell, and the raw gas inlet faces the quartz window. It is used to improve the reaction efficiency.

The invention discloses a high-temperature idle sunning prevention device of a solar water heater and a control method of the high-temperature idle sunning prevention device. The high-temperature idle sunning prevention device comprises an inner container and an air supply mechanism. The inner container is provided with an air inlet which is communicated with the air supply mechanism and used for supplying air into the inner container; the air supply path of the air supply mechanism in the inner container is limited to extend in the length direction of the inner container. According to the high-temperature idle sunning prevention device of the solar water heater, the air supply mechanism is installed on the solar water heater, starting and stopping of the air supply mechanism are controlled according to the obtained air temperature in the inner container, the idle sunning temperature of the solar water heater can be effectively reduced, and therefore the service life of the whole machine is prolonged, and the risk that people are hurt by high temperature is reduced.

The utility model discloses an environment-friendly heat insulation waterproof structure which comprises an outer wall, a heat preservation outer wall structure used for water prevention and heat insulation is arranged on the outer side of the outer wall, and the heat preservation outer wall structure comprises a fixed cross beam, a fixed plate, a fixed vertical beam, a heat insulation bin, a transparent glass layer and a heating pipe. A plurality of fixing plates are evenly and fixedly arranged at the position, at the lower end of the fixing cross beam, of the surface of the outer wall, fixing vertical beams are fixedly arranged behind the fixing plates and the fixing cross beam, the thermal insulation bin is arranged between the fixing vertical beams, and a transparent glass layer is arranged on one side of the thermal insulation bin. The solar water heater not only can insulate heat, prevent water and protect the outer wall of a building and prevent heat from entering a room, but also can utilize solar energy to heat water, and then the hot water can be used for washing and washing, so that heat energy of the sun can be fully utilized, energy waste is reduced, and the solar water heater can play a role in environmental protection.

A photovoltaic and photo-thermal integrated PVT assembly comprises a photovoltaic panel, a flexible heat collection assembly is arranged on the back face of the photovoltaic panel, a circle of frame is arranged on the edge of the back face of the photovoltaic panel, and the portion, in the frame, of the back face of the flexible heat collection assembly is filled with a foaming heat preservation layer. The flexible heat collection assembly comprises a heat collection assembly inner layer and a heat collection assembly mold pressing outer layer, a plurality of long-strip-shaped protruding parts are arranged on the heat collection assembly mold pressing outer layer in a hot pressing mode, and the peripheral edges of the heat collection assembly inner layer and the heat collection assembly mold pressing outer layer and the sides of the protruding parts are connected in a high-frequency heat sealing mode. More than two water pipe connectors are arranged on the back face of the heat collection assembly mould pressing outer layer in a heat sealing mode, and flow channels connected with the water pipe connectors are formed among the long-strip-shaped protruding part, the heat collection assembly inner layer and the heat sealing connecting part. The solar heat collector is light, convenient, beneficial to construction, installation and transportation, more corrosion-resistant, safer, good in heat collection effect and lower in production cost, the service life of the assembly is longer, and the selling price of finished products can be greatly reduced.

The application discloses a solar energy, air energy and phase change energy storage coupled heat pump unit which comprises a heat supply pipeline, a circulating heating mechanism and an integrated evaporator, a compressor, a condenser and an expansion valve which are sequentially installed on the heat supply pipeline; the integrated evaporator comprises an insulation shell, a heat absorption glass plate, a lower header tank, an upper header tank and an energy storage heat collecting pipe; the energy storage heat collecting pipe comprises a heat collecting sleeve pipe, an inner heat transfer pipe, a water inlet ring pipe, an upper sealing piston, a lower sealing piston and a limiting piece; air inlets are formed in opposite two side walls of the insulation shell; and the circulating heating mechanism comprises a circulating return pipe, a circulating water supply pipe, a heating water tank and a circulating pump. The heat energy is extracted from the solar energy, the air energy and the phase change energy storage, and is coupled with a water source heat energy unit to provide heating for buildings, so that the sustainable development of energy can be realized; when the water in the heat collecting sleeve pipe is completely frozen, the ice in the heat collecting sleeve pipe is discharged from the heat collecting sleeve pipe, so that the ice melting energy consumption can be reduced, and the subsequent rapid heating for the heat user is facilitated.

The main object of the invention is a solar thermal collector (1), comprising: a front face element (2); an internal volume (V); an absorber (4), located in the internal volume (V), configured to absorb solar radiation and transform it into heat; a collector tube (5), located in the internal volume (V) such that the absorber (4) is between the front face element (2) and the collector tube (5), comprising a heat transfer fluid (F); a heat transfer means (6), located between the absorber (4) and the collector tube (5); and a sliding thermal contact element (7), located between the heat transfer means (6) and the collector tube (5).

The application discloses a heat storage material, and the heat storage material is a thermochemical adsorption heat storage material taking a crystalline hydrate as a main material, and the heat storage material is prepared by mixing hydrate potassium carbonate, expanded graphite and OP-10. The application further discloses a heat storage module structure, and the heat storage module is located in a heat storage hot water layer, and the heat storage module is formed by encapsulating the heat storage material as described above. The application can assist in converting solar energy into hot water heat for users to utilize, and has better heat shielding effect and solar light heat utilization efficiency.

The present invention relates to the technical field of animal husbandry facilities, and provides a sheep house ventilation system and method. The sheep house ventilation system includes: a sheep house, wherein the sheep house is provided with a solar heat collecting panel; an air intake mechanism, wherein the air intake mechanism is connected to the solar heat collecting panel and communicated with the sheep house; and an exhaust mechanism, wherein the exhaust mechanism is communicated with the sheep house. The present invention provides an air intake mechanism and an exhaust mechanism respectively communicated with the sheep house, wherein the air intake mechanism is connected to the solar heat collecting panel, so that the solar heat collecting panel heats the air introduced into the sheep house by the air intake mechanism, thereby raising the temperature in the sheep house to a temperature suitable for the growth of the sheep. The exhaust mechanism can discharge the air in the sheep house, thereby achieving a ventilation effect in the sheep house, promptly removing harmful gases in the sheep house, ensuring that the temperature in the sheep house is suitable, the air is fresh and dry, and improving the survival rate of the sheep.

The utility model discloses a photovoltaic solar heat collector which comprises a solar photovoltaic panel, a heating water pipe is laid on the back face of the solar photovoltaic panel, a water inlet is formed in one end of the heating water pipe, and a water outlet is formed in the other end of the heating water pipe. The heating water pipes are arranged in multiple rows, every two adjacent water pipes are connected in an end-to-end mode through a bent pipe, and the surfaces of the heating water pipes are coated with heat absorption coatings. The heating water pipe is a stainless steel corrugated pipe, and the heat absorption coating is formed by mixing graphite, carbon black, resin and ceramic. The solar photovoltaic heating system can supply hot water while supplying power and heating, is small in change amount on the solar photovoltaic panel, is low in development and use cost, and can be widely applied to the field of solar photovoltaics.

The utility model relates to an energy storage adjusting type heat pump heat supply system which comprises a photovoltaic heat exchange module, an energy storage device and a heat pump unit, and is characterized in that the energy storage device comprises a shell, an inner container, a left water catchment channel, a right water diversion channel, a heat storage pipeline and spiral heat exchange pipelines, and the spiral heat exchange pipelines are connected into an integrated heat exchange pipeline; an inlet and an outlet of the integrated heat exchange pipeline penetrate through the outer wall of the energy accumulator and then are connected with the heat pump unit, a first temperature sensor is arranged on the outer side of the outlet of the integrated heat exchange pipeline, and a first lifting pump is connected to the outer side of the inlet of the integrated heat exchange pipeline. An outlet of the left water catchment channel and an inlet of the right water diversion channel penetrate through the outer wall of the energy storage device and then are connected with the photovoltaic heat exchange module, a heat preservation cavity is formed between the shell and the inner container, phase change heat storage media are arranged in the inner container, a corrugated compensator and a transparent heat preservation cover covering the outer side of the corrugated compensator are arranged on the top of the shell, and a heating rod is additionally inserted in the inner container. The system improves the heat transfer efficiency on one hand and enhances the heat preservation performance on the other hand.

The application discloses an energy-saving and environment-friendly solar heat storage and supply device which can effectively improve heat storage capacity and solar energy utilization effect, and can effectively suppress the imbalance of solar heat production through the energy storage of a heat storage water tank. Meanwhile, the heat storage water tank comprises a water tank body in a cylindrical structure and a vacuum heat preservation cylinder, so that the heat preservation effect of the heat storage water tank can be effectively improved. When solar energy is slightly insufficient, the inner storage cavity stores hot water with a higher temperature, and the outer storage cavity stores hot water with a slightly lower temperature, so that the amount of heat dissipation of the outer storage cavity to the outside can be reduced. Meanwhile, the water in the outer storage cavity can be returned to solar energy for utilization when solar energy is seriously insufficient, so that the heat of output hot water is effectively ensured, heat storage effect and suppression capacity are improved, the control of the application is simple, energy loss can be effectively saved, and heat utilization effect and capacity are ensured.