209 results about "Solar water heating" patented technology

The invention discloses a photo-thermal phase change fiber material with a core-shell structure and a preparation method of the photo-thermal phase change fiber material. The method comprises the following steps: performing coaxial electrostatic spinning on a shell layer spinning solution and a core layer spinning solution to obtain core-shell structure nanofibers; soaking the core-shell structure nanofiber in the hydrophobic modification solution; and heating and drying the soaked fibers to obtain the photo-thermal phase change fiber material with the core-shell structure. The material can enhance adsorption of marine leaked crude oil through solar heating, can cope with complex weather conditions through heat storage of the phase change material, and has the advantages of simple preparation method, strong crude oil adsorption performance, environmental protection, harmlessness and the like.

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.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

A method for synchronously activating persulfate using "light-heat-FeS2 / dust-free cloth" and a use. Metal iron sulfide FeS2 is loaded to the surface of black dust-free cloth ALC in an ultrasonic dispersion manner to form a FeS2 / ALC integrated photo-thermal catalyst. Persulfate is activated by using Fe2+, FeS2 / ALC absorbs solar energy to heat and activate the persulfate, and sunlight directly activates the persulfate, so that the "light-heat-FeS2 / dust-free cloth integrates three activation effects for synchronously activating the persulfate, achieving efficient degradation of organic pollutants in water.

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 provides a polyether-ether-ketone composite membrane as well as a preparation method and application thereof, and belongs to the field of composite materials. The invention provides a polyether-ether-ketone composite membrane. The polyether-ether-ketone composite membrane comprises a coating, a first aramid fiber composite membrane and a second aramid fiber composite membrane, the coating is arranged on the surface of the first aramid fiber composite film; the first aramid fiber composite membrane comprises first polyether-ether-ketone and first deprotonated aramid fiber dispersed in the first polyether-ether-ketone; the second aramid fiber composite film comprises second polyether-ether-ketone, and graphene, multi-walled carbon nanotubes and second deprotonated aramid fibers which are dispersed in the second polyether-ether-ketone; the coating comprises soluble polyaryletherketone and mica sheets and / or boron nitride wrapped by the soluble polyaryletherketone; the coating is of a porous structure. The polyether-ether-ketone composite film disclosed by the invention has excellent radiation cooling performance, solar heating performance and heat-conducting performance.

The invention belongs to the technical field of intelligent household appliances, and particularly relates to a control method and device of a water heater, a medium and a program product. Under the condition that the water level of the water heater is higher than a preset water level threshold value, the environment temperature of the water heater is detected; according to a working mode judgment rule corresponding to the temperature interval, the working mode of the water heater is determined, and the working mode is a solar mode or a solar heating pump mode; according to the method, through the intelligent control strategy based on the water level and the environment temperature, the accuracy of the starting time of the heat pump water heater is improved, and the hot water supply stability and the energy utilization efficiency are effectively improved.

The invention relates to the technical field of construction energy design, and particularly discloses a multi-objective optimization design method for a green building, which comprises the following steps of: in a plurality of historical acquisition periods, respectively acquiring the use peak periods of a ground source heat pump and a solar water heating device in each historical acquisition period, carrying out time period superposition comparison, determining a shared peak period, and carrying out time period optimization on the shared peak period; the designed temperature difference trigger serves as a basic switching strategy, state switching simulation testing is conducted on the ground source heat pump and the solar water heating device in each common peak period, the water temperature change type in each simulation testing stage is determined, the characteristics of water temperature fluctuation in different periods of time can be obtained, and the simulation testing efficiency is improved. Therefore, energy supply of the ground source heat pump and the solar water heating device is reasonably distributed, the requirement characteristics of different user groups for the water temperature in different time periods can be known, the water temperature fluctuation is controlled within a reasonable range, the water temperature fluctuation is reduced, the probability of system failures is reduced, and the stability of hot water supply is improved.

The invention discloses an absorption refrigeration system based on combined driving of solar energy and waste heat of a data center. The absorption refrigeration system comprises a multi-energy complementary heat collection circulation module and an absorption refrigeration circulation module. The multi-energy complementary heat collection circulation module comprises a solar heating unit, a liquid cooling cabinet and a plate heat exchanger. And the solar heating unit and the liquid cooling cabinet are respectively connected with the plate heat exchanger. And the absorption refrigeration cycle module is connected with the multi-energy complementary heat collection cycle module. The absorption type refrigeration cycle module comprises an absorption type refrigeration cycle generator, a gas-liquid separator, a condenser, an evaporator, a mixer, an absorber and a solution exchanger. And the absorption refrigeration cycle generator is connected with the plate heat exchanger and the gas-liquid separator. And the gas-liquid separator is connected with the condenser and the solution exchanger. And the condenser is connected with the evaporator. The mixer is connected with the solution exchanger, the evaporator and the absorber. And the absorber is connected with the absorption refrigeration cycle generator. Dependence on external energy can be reduced, and the energy utilization efficiency is improved.

The invention relates to the technical field of data analysis, in particular to an alpine region solar central heating intelligent regulation and control system based on big data, which comprises an acquisition processing unit, an analysis control unit and a decision execution unit. A data storage module in the analysis control unit adopts a distributed architecture to store data, predicts a heating demand and a solar heat collection trend by applying a hybrid algorithm fusing a deep learning neural network and a physical model, generates a control instruction and transmits the control instruction to a heat source adjusting module, and the heat source adjusting module adopts an incremental conductance method to adjust solar heating. And the valve driving module adjusts the opening degree of the valve based on a PID algorithm, and the regulation and control precision and the energy utilization efficiency of the heating system are improved.

The invention relates to an emergency ecological pond pretreatment system for a constructed wetland, which comprises: a facultative anaerobic zone used for enabling a water body to enter a facultative anaerobic environment for denitrification reaction; the filler aeration area is connected with the facultative anaerobic area through a water inlet gate, and biodegradable organic pollutants in the water body are removed through the combined action of oxygenation and microorganisms; the settling zone is connected with the filler aeration zone and comprises a sludge treatment system; the water outlet area is communicated with the settling area and is used for lifting outlet water to each subsurface flow wetland treatment unit through a lifting pump; wherein a solar heating plate is arranged at the upper parts of the facultative area and the filler aeration area, so that a closed area is formed and is used for heating a water body. By adopting a form of combining with the constructed wetland, the problem that the quality of effluent of the constructed wetland is unstable is solved, meanwhile, the solar heating system is additionally arranged to heat a water body, the dependence of the water quality improvement effect of the constructed wetland on the temperature can be reduced, the occupied area is greatly reduced, and great market application prospects are achieved.

A supercritical carbon dioxide cycle power generation system and method based on spectral modulation is described. The system consists of a solar heating section, a carbon dioxide storage section, a compression section, and a power generation section. The solar heating section includes a radiant heater and a field of mirrors; the carbon dioxide storage section includes an energy balancer (2); the compression section includes a drive motor, a compressor, a cooler, and a regenerator; and the power generation section includes a turbine and a generator. The present invention utilizes a spectral modulation coating to adjust the solar visible spectrum to the infrared band absorbable by carbon dioxide, and exploits the rapid temperature rise properties of solid particles absorbing solar energy. This allows the carbon dioxide to be rapidly heated to a high temperature through radiation-coupled convection before participating in the power generation cycle. A supercritical energy balancer is also provided to balance the intermittent nature of solar energy and to reuse abandoned electricity at night.

The utility model provides an auxiliary heating device of a solar energy storage and air energy control system, and mainly relates to the technical field of solar heat utilization. An auxiliary heating device of a solar energy storage and air energy control system comprises a heating water tank, a heat-conducting medium box body, an air energy heating device, a supporting frame, a solar heating device, an energy storage water tank and a control device, and the heating water tank, the heat-conducting medium box body, the air energy heating device and the solar heating device are fixedly installed on the supporting frame. A first heat exchange pipeline is arranged between the heating water tank and the solar heating device, the first heat exchange pipeline is further connected with a heat-conducting medium box body, and a heat-conducting agent circulates in the first heat exchange pipeline. By means of the modular design, solar energy and air energy can be comprehensively utilized, the heat energy transfer path and control logic are optimized, the efficient and energy-saving heating effect is achieved, the system is suitable for various scenes such as residences, commercial buildings and industrial places, and the effects of energy conservation and emission reduction are achieved.

This invention discloses a solar-powered device and method for desalinizing saline-alkali soil, relating to the field of saline-alkali soil improvement. The device includes a solar power generation unit, a soil salt extraction unit, a soil extract cation and anion direct current separation unit, and a salt collection unit. The method involves: extracting saline from the saline-alkali soil with water, guiding the extract to the cation and anion direct current separation unit, where the anions and cations in the extract move towards their respective ends under the action of the anode and cathode electrodes. The high-concentration brine near the anode and cathode electrodes is then guided to a brine collection tank, while the liquid in the middle of the cation and anion direct current separation unit has a lower salt content and is recycled for further extraction of saline-alkali soil salt. The direct current power used in the device comes from solar photovoltaic panels, and the brine is heated and dried using solar energy.

The present invention discloses an energy storage system and method for integrated absorption refrigeration using R134a as a circulating medium. The system includes an energy storage power generation module, an absorption refrigeration module, a solar heating module, an oil tank module, and a thermochemical energy storage module. The R134a vapor outlet of the reaction absorber is connected to the R134a storage tank. The R134a vapor discharged from the R134a storage tank flows to the energy storage power generation module and the absorption refrigeration module to provide cooling and electricity. Heating and cooling in the reaction absorber are achieved through heat exchange with hot and cold oil, which is provided by the solar heating module, the oil tank module, and the thermochemical energy storage module. Using R134a refrigerant as the circulating medium for the energy storage power generation module and the absorption refrigeration module increases energy storage density. Combining the absorption refrigeration device with the compressor unit and gas storage unit of the compressed air energy storage device to form a reaction absorber allows for miniaturization of the device. The multiple energy supply meets the uninterrupted cooling and power supply needs of small residential and commercial buildings.

The invention discloses a laser-constructed aluminum-based dual-mode heat regulator and application thereof. The aluminum-based dual-mode heat regulator comprises an aluminum base; one side of the aluminum base is provided with a passive radiation cooling layer, and the other side is provided with a solar heating layer; the passive radiation cooling layer comprises a laser constructed aluminum oxide layer and a hydrophobic-emission enhancement layer above the aluminum oxide layer; and the solar heating layer comprises a black aluminum layer constructed by laser and a hydrophobic layer arranged above the black aluminum layer. According to the invention, Al2O3 and black Al nanoparticles are directly assembled on an Al sheet as a dual-mode functional layer through laser surface direct writing (LSDW), and then a hydrophobic material is sprayed as a self-cleaning layer. The inherent high thermal conductivity of the Al sheet is beneficial to efficient heat exchange between the functional surface and the target building, and effective temperature adjustment is achieved. The passive radiation cooling function and the solar heating function are integrated in one device, and cooling and heating can be easily achieved according to seasonal changes.

The present invention discloses an expandable heat exchanger that contains a storage chamber / compartment (10) at the top and plurality of parallelly arranged heating tubes (9). The storage chamber (10) comprises two concentric tubes to separate the cold and hot fluid. The inner tube (8) provides passage to the cold air ingestion through the inlet port (13), into the tubular inner passage (11), the cold air directed into the heat observing tube (9). The hot (7) and cold (8) header chamber are in airtight connection with start unit (3), expandable unit (5) and exit unit (5) with the help of push fit bush assembly. The cold from all the units travels into the solar collector tube. Finally, the hot air from the collector tubes reaches back into the header compartment but in the outer shell (12), and then the hot air pumped out through the outlet port (14).

The utility model discloses an unmanned monitoring passive energy-saving constant-temperature room capable of being quickly assembled. The unmanned monitoring passive energy-saving constant-temperature room comprises a room body built in an assembly type building mode. The house main body is subjected to heat preservation or heat insulation treatment and is internally provided with an air conditioner for keeping indoor constant temperature; a heat exchange device of the air conditioner exchanges heat between air in a room of the house main body and stored water in a heat storage water tank arranged outside the house main body; the heat storage water tank is connected with the solar water heating device and the heat dissipation device through pipelines, stored water is heated through the solar water heating device, and the stored water is cooled through the heat dissipation device. And a pipeline of the solar water heating device for heating water in the heat storage water tank is controlled to be opened and closed by a temperature sensor arranged in the house main body chamber. The energy consumption for keeping the constant temperature of the building is greatly reduced, the cost of a power generation device and energy storage equipment can be effectively reduced, energy conservation and emission reduction in the operation process are further achieved, and the purposes of green energy conservation and carbon reduction in the whole process of the building are achieved.

The invention discloses a cattle farm playground water trough anti-freezing temperature control system based on solar energy storage, and relates to the technical field of livestock breeding equipment, the cattle farm playground water trough anti-freezing temperature control system comprises a solar power generation module, an energy storage management module, a temperature control execution module and an intelligent control module, the solar power generation module is electrically connected with the energy storage management module and the temperature control execution module, and the intelligent control module is electrically connected with the energy storage management module. The energy storage management module is electrically connected with the temperature control execution module and the intelligent control module, and the temperature control execution module is in signal connection with the intelligent control module. Compared with an existing solar heating device lacking a stable energy storage system, the cattle farm playground water trough anti-freezing temperature control system based on solar energy storage stores electric energy through a solar storage battery of the energy storage management module, and the solar energy storage management module stores the electric energy at night or in a scene with insufficient illumination such as cloudy and rainy days; a storage battery power supply mode can be switched through the intelligent control module, continuous operation of the temperature control execution module is guaranteed, freezing of the water trough due to power supply interruption is avoided, and normal water drinking of cattle in winter is guaranteed.

This application proposes a dual-cycle solar thermal power generation system and method for compressed CO₂ energy storage. This application includes a CO₂ dual-cycle power generation system, a compressed CO₂ energy storage system, and a concentrating solar heat collection system. The CO₂ dual-cycle power generation system includes a supercritical CO₂ Brayton cycle system and a transcritical CO₂ Brayton cycle system in which the CO₂ working fluid circulates, and the two are heat-exchanged and connected; the compressed CO₂ energy storage system is connected to the supercritical CO₂ Brayton cycle system and is used to input the CO₂ working fluid to the supercritical CO₂ Brayton cycle system or receive the CO₂ working fluid output by the supercritical CO₂ Brayton cycle system under different working conditions; the concentrating solar heat collection system uses solar energy to heat the CO₂ working fluid entering the supercritical CO₂ Brayton cycle system and the compressed CO₂ energy storage system. This application constitutes a dual cycle and an energy storage system with pure CO₂ as the working fluid, maximizing the energy utilization rate.

The clean development mechanism requires to replace fossil fuel with clean energy as much as possible. According to an existing solar heating pipe heat collecting device, a heating pipe is fixed, and a collecting lens is generally arranged at a small corner of the ground, so that design and construction are convenient, and investment is saved; however, a mirror surface system is insufficient in lighting quantity, low in efficiency, insufficient in energy reflected to a heating pipe, low in light energy utilization rate and single in heating; sufficient solar energy is wasted in vain around many energy-consuming places, and there is no suitable facility for use, such as heating in many old industrial and mining scenes, offices, schools, hospitals, hotels, common people and the like, so that the solar energy is wasted in vain. The invention provides a suspension type solar condensation heating pipe system, a heating medium heating pipe is arranged at the high altitude and is just close to a focus line of a groove type condensation lens, the condensation lens is hung on the heating pipe, and the condensation lens irradiates a heating pipeline; the heating pipe can also be of an assembly combined structure, so that multifunctional heating is realized; solar energy can be easily and efficiently utilized in existing cities and villages at low cost.

The present invention relates to a smooth, cylindrical stainless steel tube-shaped heat exchanger (Figure 1) consisting of three tubes (5-6-7) for vaporizing water (seawater, pure water, freshwater, or wastewater) to produce steam (3) by a concentrated solar thermal energy process, using geothermal heat and other forms of heat with cogeneration, and by extension, for producing steam and producing hydrogen and oxygen by electrolysis. For its process applications, it takes the form of a cylindrical tube with a variable diameter (8-9) depending on the quantity of water (2) to be vaporized, and with a length (8) and width (9) defined and modulated based on the flow parameters of a heat transfer fluid (1-4) heated by concentrated solar energy in situ.The stainless steel cylindrical tube heat exchanger is characterized by its unique process interaction capacity, whereby heat transfer occurs by convection and conduction through the tube (6), i.e., heat transfer from a hot body, the oil-carrying fluid (7), to a cooler body (5), which is a water-carrying fluid (2). This can be achieved through simple installations in areas exposed to sunlight, such as subsoil or a medium- or high-enthalpy geothermal well.Once the stainless steel cylindrical tube heat exchanger is installed and configured, piping systems carry water (2) into the designated space and then to the heat transfer system according to the invention. There, the fluid temperature is raised above its boiling point, and the water is then returned to the surface via the same piping system to be vaporized by venting it (3) outside the heat exchanger. The stainless steel cylindrical tube heat exchanger, by its method of use, relates in its functions to methods of vaporizing water (seawater, freshwater, and wastewater) by evaporation.

The application belongs to the technical field of clean energy, and relates to a geothermal energy-solar energy-hydrogen energy coupling power generation system and method, which comprises a geothermal energy heating unit, a solar energy heating unit, an organic working medium circulating unit and a hydrogen circulating unit. By constructing the geothermal energy-solar energy-hydrogen energy coupling power generation system, combining the twice heating efficient power generation of the organic working medium circulation and the electric energy storage-repowering function of the hydrogen circulation, not only the system output power fluctuation caused by the intermittency and fluctuation of the solar energy is effectively suppressed, the output power quality is guaranteed to meet the grid connection requirement, but also the working condition fluctuation of the core power generation equipment is reduced, the equipment start-stop frequency and component wear are reduced, the equipment service life is prolonged and the operation and maintenance cost is reduced, at the same time, the storage and cross-period reuse of the excess electric energy are realized, and the utilization efficiency of the renewable energy and the system operation stability are further improved.

1. Name of the product in this design: Solar-heated insulated bucket. 2. Application of this design: Container for holding liquids, especially suitable for applications where heating and insulation are achieved by connecting to solar photovoltaic panels. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses water heat storage boiler equipment which comprises a controller, a heat storage device and a circulating pump. The controller receives data of the sensor and controls operation of other parts. The capacity of a heat storage tank of the heat storage device is 1-5 tons, and an electric heater, a water temperature sensor, an overtemperature power-off switch and the like are arranged in the heat storage tank. And the circulating pump realizes accurate indoor temperature control according to feedback adjustment of the sensor. The equipment can also be equipped with a solar heating device and a photovoltaic power generation system, and has the functions of automatic water replenishing, water level display, flow pressure monitoring and the like. Through night off-peak electricity energy storage and multi-energy cooperation, efficient, energy-saving and stable heating can be achieved, the cost is reduced, and remote control and intelligent optimization of operation parameters can be achieved.

A solar thermal generator comprises a quartz window which is arranged on a metal shell, forms an electromagnetic resonant cavity structure and is used for receiving solar energy; the ceramic guide pipe is arranged in the metal shell, and the working medium in the ceramic guide pipe is heated through the solar energy; the heat exchanger is arranged in the vacuum heat preservation oil tank; the steam generator is arranged in the vacuum heat preservation oil tank; the ceramic heating pipe is arranged in the combustion chamber; and the turbine is communicated with the steam generator through a fifth pipeline and a sixth pipeline. Compared with traditional solar power generation, the solar power generation system is environmentally friendly, safe, low in cost, high in efficiency, free of pollution and emission and not affected by natural weather and environment. Networking power generation can be dispatched like natural gas. Particularly, after hydrogen and hydrogen-silicon liquefied gas are mixed and combusted, waste hydrogen can be recycled, so that the consumption of hydrogen energy fuel is greatly reduced, and a new and effective technical approach is explored for realizing ideal new energy development.

The utility model relates to the technical field of energy, and discloses a heat source tower solution concentration device fully utilizing solar energy, which comprises a solar heat collector, the input end of the solar heat collector is fixedly connected with a solar heating circulating water pump, and the input end of the solar heating circulating water pump is fixedly connected with a heat source tower solution box. The output end of the heat source tower solution tank is fixedly connected with a solution concentration circulating pump, the output end of the solution concentration circulating pump is fixedly connected with a solution concentration evaporative cooler, the outside of the heat source tower solution tank is fixedly connected with a plurality of pipelines, and a dilute solution inlet valve is arranged outside one of the pipelines. Compared with the prior art, the cooling and heating system capable of fully utilizing the heat exchange amount of the heat source tower can recycle and reuse solution, energy consumed by the system comes from solar energy, loss of the solution in operation of the system is greatly reduced, and economical efficiency and energy-saving performance of the system are improved.

This utility model relates to a solar water heating supply device, belonging to the field of solar water heating supply technology. The device includes a support frame, a water tank fixedly mounted on the top surface of the support frame, a municipal water inlet pipe fixedly connected to one side of the water tank, several vacuum collectors fixedly mounted on both sides of the support frame, one end of each vacuum collector passing through the support frame and fixedly connected to the water tank, and a water inlet pipe fixedly connected to the other side of the water tank. A storage tank is located on one side of the water tank, and an inner tank is installed inside the storage tank. A pressure pump is installed on the water inlet pipe, one end of which passes through the storage tank and is fixedly connected to the inner tank. A stirring assembly is installed inside the inner tank, and an outlet pipe connected to the inner tank is located on one side of the storage tank. A vacuum state is created by utilizing the gap between the storage tank and the inner tank, which prevents heat loss through heat conduction.

The invention discloses a thin-film solar heating pad which comprises a first transparent bottom electrode, a thin-film battery functional layer and a composite functional layer used for replacing a top electrode, the first transparent bottom electrode and the thin-film battery functional layer sequentially cover the upper surface of a first transparent substrate, the composite functional layer is a transparent conductive heating film, and the first transparent bottom electrode is coupled with one end of a storage battery. The other end of the storage battery is coupled with the transparent conductive heating film through the photovoltaic controller, the positive electrode of the storage battery is coupled with one end of the transparent conductive heating film through the electric control unit, and the negative electrode of the storage battery is coupled with the other end of the transparent conductive heating film. The heating pad has the beneficial effects that the transparent conductive heating film is arranged on the top surface of the functional layer of the thin-film battery to replace a top electrode, and the transparent conductive heating film not only plays a heating role, but also can replace the top electrode of the functional layer of the thin-film battery to carry out electron circulation and form a charging loop, so that the thickness of the heating pad is favorably reduced; the transparent conductive heating film does not influence the light energy capture of the thin-film cell functional layer due to the transparent characteristic of the transparent conductive heating film.

The utility model discloses a circulating auxiliary heating device for central heating, which belongs to the technical field of central heating and comprises a heating cylinder and a heating pipe, and a solar heating mechanism is arranged on the side of the heating cylinder. According to the utility model, when hot water in the heat preservation chamber is pumped into the heating pipe through the first water pump and the water guide steel pipe to carry out auxiliary heating on heating water in the heating pipe, water subjected to heat exchange in the heating pipe is guided into the pre-storage chamber from the water return steel pipe to be temporarily stored, and backflow water is guided into the inner cavity of the heating chamber through the first electric control valve; low-temperature water is reheated through a first electric heating rod in the inner cavity of the heating chamber, and when the low-temperature water is reheated to the temperature the same as that of hot water in the inner cavity of the heat preservation chamber, the hot water in the inner cavity of the heating chamber is guided into the heat preservation chamber through a second electric control valve, so that water in a heating pipe is subjected to auxiliary heating through the hot water subsequently; and the practicability of the device is improved.