619 results about "Heat recirculation" patented technology

The invention relates to a liquid air energy storage and terrestrial heat coordinated underground space air regulation and control system and method. Comprising a first-stage compressor, a second-stage compressor, a third-stage compressor, an expansion refrigerator, a first-stage compression heat exchanger, a second-stage compression heat exchanger, a third-stage compression heat exchanger, a cold box, a separator, a liquid air storage tank, a cryogenic pump, an evaporator, a cold storage circulating pump, a cold storage box, a compression heat exchange circulating pump, a compression heat storage box, a first heater, a second heater and a third heater. The system comprises a first air expander, a second air expander, a third air expander and a generator. The regeneration heater is used for guiding the compression heat generated by the compressor into the regeneration heater for regeneration and / or guiding the geothermal energy output by the geothermal energy output end into the regeneration heater for regeneration; the rotary wheel dehumidification device is used for performing cryogenic drying on the wet air; the fresh air processing unit is composed of a fresh air filter, a regeneration fan, a regeneration filter and an air supply fan.

The invention belongs to the technical field of hydrogen energy, and particularly relates to a solid hydrogen storage system with two charging and discharging ends and a working method.The solid hydrogen storage system comprises at least two independent solid hydrogen storage units, and each solid hydrogen storage unit independently communicates with an upstream hydrogen supply pipeline through a first valve set and independently communicates with a downstream hydrogen using pipeline through a second valve set; each solid hydrogen storage unit is selectively communicated with the thermal circulation loop or the cold circulation loop through a third valve group; the first valve group, the second valve group and the third valve group are controlled, so that when the upstream hydrogen supply pipeline has a hydrogen supply demand and the downstream hydrogen use pipeline has a hydrogen use demand, the first solid hydrogen storage unit is configured to be in a hydrogen charging mode, and meanwhile, the second solid hydrogen storage unit is configured to be in a hydrogen discharging mode; the solid hydrogen storage unit in the hydrogen charging mode is communicated with the upstream hydrogen supply pipeline and the cold circulation loop for charging hydrogen, and the solid hydrogen storage unit in the hydrogen discharging mode is communicated with the downstream hydrogen supply pipeline and the hot circulation loop for discharging hydrogen.

The invention discloses an efficient thermal cycle drying device for producing flaky ammonium bifluoride, and relates to the technical field of ammonium bifluoride production. Comprising a machine body, an exhaust pipe and an air inlet sleeve, a first shell and a second shell are sequentially mounted at the upper end of the machine body from left to right, an air inlet cavity is formed in the bottom of the inner side of the machine body, and a mounting cylinder is connected to the upper end of the air inlet cavity through a spring; through cooperation of a mounting cylinder, a movable cylinder, a scraping plate and a first adjusting assembly, when materials are subjected to traditional one-way vibration blowing heat exchange, the materials are thrown and turned in the other direction to increase the drying uniformity, meanwhile, the air flow pressure of an exhaust hole is correspondingly adjusted, and the heat exchange drying effect is improved; and through cooperation of the movable barrel and the second adjusting assembly, when materials with the large water content and the large feeding amount are dried, the moving speed of the materials is increased, meanwhile, the air flow pressure of the exhaust holes is correspondingly adjusted, and the heat exchange drying effect is improved.

The utility model relates to a triple-cycle high-salinity wastewater low-temperature scraper drying system which comprises a roller scraper dryer, a steam condensation chamber, a condensed water tank and a vacuum pump, the vacuum pump vacuumizes the drying cavity through the condensate water tank and the steam condensation chamber. The first heat exchange cycle is suitable for exchanging heat absorbed by the steam condensation chamber to the third heat exchange cycle; the second heat exchange cycle is suitable for exchanging heat of the third heat exchange cycle to the water jacket; and the heat exchange ends on the two sides of the third heat exchange cycle are connected with the first heat exchange cycle and the second heat exchange cycle correspondingly. The three heat exchange cycles work cooperatively, the heat of the first heat exchange cycle is reduced, the heat provided for the second heat exchange cycle by the third heat exchange cycle is reduced, and the hot water in the second heat exchange cycle can still heat the materials in the drying cavity by exceeding the boiling point rise through the auxiliary heat, so that the low water content of the dry materials is effectively ensured.

The invention discloses a variable-capacity air fryer convenient to operate. Comprising a base, a guide rail assembly vertically arranged on the side of the base, a sliding seat assembly in sliding fit with the guide rail, a heating machine head arranged on a sliding seat, an elastic reset piece connected with the guide rail and the sliding seat, an elastic locking assembly arranged on the sliding seat, an external first handle and at least two pot bodies. The guide rail is provided with a plurality of gear lock holes and a sliding groove, and the first handle is connected with the sliding seat through the sliding groove and can drive the sliding seat to ascend and descend and enable the locking assembly to be inserted into the corresponding lock hole so as to lock the height of the machine head. And the pot body can be placed on the base and covers the machine head. The structure realizes quick adjustment of the machine head, adapts to pot bodies with different capacities, does not need to disassemble the machine head, and is convenient to operate, sanitary, safe, and good in sealing performance and heat cycle effect.

The invention provides a segmented heat control welding method and system for a dual-phase steel thick-wall component, and relates to the technical field of welding. The method comprises the steps that a segmented unit planning set is constructed; generating a segmented unit multi-source synchronous data set; constructing a welding thermal cycle characteristic parameter set; generating a welding control constraint set; obtaining a segmented heat input deviation instruction set; generating a welding process parameter adjusting instruction; and according to the actual welding seam structure performance in the long-term welding process, a parameter optimization algorithm is adopted to optimize the adjustment process, and continuous updating of the segmented heat control welding model is achieved. The technical problems that in the prior art, heat input control is extensive, temperature field monitoring is not comprehensive, technological parameter adjustment lags behind, and quantitative bases are lacked are solved.

A waste heat recycling device of a molecular sieve oxygenerator comprises an air compressor A, an air compressor B, a circulating water tank, a heat preservation water tank and a cooling tower, the air compressor A and the air compressor B are connected with a heat exchanger A and a heat exchanger B through circulating pipelines respectively, a thermostatic valve A and a thermostatic valve B are arranged on the circulating pipelines respectively, and the heat exchanger B is connected with the heat exchanger A and a heat exchanger C; the circulating water tank is connected with the heat exchanger A and the heat exchanger C, and a water pump A is arranged on a pipeline connected with the heat exchanger A. The circulating water tank is connected with the cooling tower so that the heat dissipation capacity of the air compressor at the high temperature in summer can be improved, the air compressor is prevented from being shut down at the high temperature, the PLC automatically switches the waste heat recovery mode and the cooling tower heat dissipation mode according to the water temperature priority, and energy waste is avoided. Multiple heat exchangers are adopted for heat exchange, circulating water and user water are isolated from each other, and scale and domestic water pollution caused by high temperature are avoided, so that energy needed by working of the cooling tower is saved, domestic hot water and energy needed by air conditioner heating are also saved, and the service life of the cooling tower is prolonged. In addition, the heat exchangers are all made of stainless steel materials and can tolerate possible corrosion of trace oil and water vapor in exhaust of the air compressor.

Provided are a solder alloy, a solder paste, a solder ball, and a solder joint which have a low melting point, are excellent in ductility, shear strength, and heat cycle resistance, further suppress the occurrence of open defects, and in addition, have reduced residual voids even at the time of joining in a large area. A solder alloy has an alloy composition of, by mass %, Bi: 35.0 to 68.0%, Sb: 0.1 to 2.0%, Ni: 0.010 to 0.050%, Ge: 0.007 to 0.090%, with the balance being Sn. Preferably, the alloy composition further contains, by mass %, at least one of Co, Ti, Al, Mn, As, Fe, Pd, Zn, Zr, Pb, In, Ce, P, and Ga: 0.1% or less in total. Further, this solder alloy can be suitably used for solder pastes, solder balls, and solder joints.

This invention proposes a method and system for improving the power generation efficiency of steam turbines, relating to the field of gas-fired power generation technology in steel plants. The method includes: obtaining and purifying high-temperature flushing water from the blast furnace flushing process; using the purified high-temperature flushing water to heat a circulating medium; introducing the heated circulating medium into a thermal storage station to mitigate the intermittency and fluctuations of the waste heat from the flushing water; using the heated circulating medium from the thermal storage station to heat condensate; the cooled circulating medium after heat exchange entering a cold storage station; exchanging heat between the cooled circulating medium from the cold storage station and the purified high-temperature flushing water to form a closed-loop circulation of the circulating medium; and sending the heated condensate, after further multi-stage heating, into a boiler to generate steam to drive the steam turbine for power generation. The method and system proposed in this invention can effectively utilize the waste heat from the blast furnace flushing water, thereby improving overall efficiency.

The invention relates to a heating temperature control method and system of a solid heat storage device, and belongs to the field of temperature control. The water outlet temperature of the heat exchanger is used as a feedback value, the preset target water outlet temperature of the heat exchanger is used as a target value, the frequency of a fan used for forming airflow heat exchange circulation between the heat accumulator and the heat exchanger is calculated through the Dahlin algorithm, and then the amount of hot air fed into the heat exchanger after being heated by the heat accumulator is adjusted; the heat exchanger is used for supplying heat to heat consumers. The working frequency of the draught fan is calculated through the Dahlin algorithm, the air volume of hot air circulation between the heat accumulator and the heat exchanger can be effectively adjusted under the condition that overshoot is avoided, and then the water outlet temperature of the heat exchanger is controlled.

The invention provides a refrigerating system and an air conditioner, the refrigerating system comprises a first compressor, a first heat exchanger, a first valve, a second heat exchanger and an ejector, the first compressor, the first heat exchanger, the first valve and the second heat exchanger are connected to form at least partial structure of a first refrigerating loop; the ejector comprises a first inlet end, a second inlet end and a first outlet end, the first inlet end is communicated to the outlet end of the second heat exchanger, the second inlet end is communicated to the exhaust end of the first compressor, and the first outlet end of the ejector is communicated to the inlet end of the second heat exchanger. According to the invention, the evaporation or condensation heat exchange efficiency can be improved, so that a refrigerant which does not fully exchange heat can continuously participate in heat exchange circulation, and the compressor is prevented from sucking air and carrying liquid; the problem that in a heat exchanger of a refrigerating system in the prior art, heat exchange of refrigerants is not sufficient, and consequently the refrigerants are not completely evaporated or condensed is effectively solved.

The utility model relates to a device for utilizing waste heat of a screw air compressor, and relates to the technical field of waste heat recovery of air compressors. A heat utilization system of a screw air compressor comprises a heat exchange system, a heat supply system and a controller. By arranging the heat exchange system, heat exchange can be conducted between deionized water in the heat exchange water tank and high-temperature cooling oil of the screw type air compressor, oil-water heat exchange circulation between the screw type air compressor and the heat exchange water tank is formed, the deionized water circulates in a closed pipeline, frequent water supplementing is not needed, meanwhile, scaling can be effectively restrained, and the service life of the screw type air compressor is prolonged. The condition of leakage of cooling oil of the air compressor is avoided, and normal use of the heat exchanger of the air compressor is guaranteed; by arranging the heat supply system, water-water heat exchange circulation between the heat exchange water tank and the heat supply water tank can be formed, water in the heat supply water tank is heated, the requirement for external daily hot water is met, and effective recycling of waste heat of the air compressor is achieved.

This invention relates to a method and system for improving the performance of a vapor compression refrigeration cycle. It utilizes two cycles: Cycle A gains heat from a heat source, releases heat to a heat sink, and stores heat using a heat carrier; Cycle B does not gain heat from a heat source but gains heat through the cooling of the heat carrier and releases heat to the heat sink. By introducing a dual-cycle architecture and utilizing a heat carrier, this invention not only solves the problems of efficiency reduction and heating interruption caused by frosting but also achieves efficient cascaded energy utilization and continuous, stable system operation. This technology can be widely applied in air conditioning, heat pumps, refrigeration, and other fields, and is particularly suitable for high-energy-consuming scenarios such as high-temperature heat pumps and cryogenic systems with large temperature differences between the heat source and heat sink, demonstrating significant energy-saving potential and broad application prospects.

This invention provides a 590MPa grade solid welding wire, a laser-arc hybrid welding process, and a welded joint. The composition system of this invention is precisely adapted to the rapid heating and cooling thermal cycle characteristics and the burn-off law of key alloying elements in laser-arc hybrid welding of 590MPa grade marine engineering steel. By strictly controlling the content of highly hardenable elements such as C, Mn, Ni, and Mo, the formation of hardened structures in the weld metal is avoided. A certain amount of Ti element is added to provide nucleation points within the grains, directionally inducing the formation of a highly oriented and complex acicular ferrite matrix structure, thereby simultaneously improving strength and toughness through grain refinement. At the same time, an appropriate amount of V element is added to further improve the strength margin of the weld metal through microalloying. This welding wire has excellent welding processability and crack resistance, and can achieve room temperature welding without preheating or post-heating, providing material support for the high-quality and high-efficiency construction of marine engineering equipment.

The present application relates to a kind of organic waste gas treatment device.Processing device, activated carbon tank A, activated carbon tank B are included;Front processing device is connected with the air inlet end A of activated carbon tank A, the air inlet end B of activated carbon tank B respectively;First end of heat cycle fan and vacuum pump after parallel connection is connected with first condenser, filter device in proper order, second end of heat cycle fan and vacuum pump after parallel connection is connected with pressure relief valve, second condenser, oxidation device in proper order, third end of heat cycle fan and vacuum pump after parallel connection is connected with nitrogen source, electric heater in proper order, electric heater is connected with the air inlet end A of activated carbon tank A, the air inlet end B of activated carbon tank B respectively;The air outlet end A of activated carbon tank A is connected with the air outlet end B of activated carbon tank B;Main fan is connected with the air outlet end A of activated carbon tank A, the air outlet end B of activated carbon tank B respectively.The present application can heat the carbon layer in activated carbon tank respectively, and heat efficiency is higher, with the advantages of energy saving and environmental protection.

This utility model discloses a constant temperature dehumidifier for heating and circulating, relating to the field of dehumidifiers. It includes a dehumidifier with a fan installed inside, a filter plate on the inner wall, and an isolation plate on one side. A hydraulic cylinder is fixed to one end of the isolation plate, and a fixing plate is connected to the end of the hydraulic cylinder. A cleaning plate is installed on one side of the fixing plate, and multiple sets of brush plates are provided on the outer wall of the cleaning plate. This utility model solves the problem of difficulty in cleaning dust adhering to the surface of the filter plate inside the dehumidifier. When it is necessary to clean the dust from the filter plate inside the dehumidifier, the hydraulic cylinder drives the cleaning plate to reciprocate across the filter plate surface via the fixing plate connected to its end. During the movement of the cleaning plate, the brush plates on one side of the cleaning plate sweep away the dust adhering to the filter plate surface. The brush plates are in close contact with the filter plate, resulting in better dust removal.

The application discloses a control method of a heat pump water heater, the heat pump water heater and a readable storage medium. The heat pump water heater comprises a shell, a heat exchange circulating system and a water tank arranged in the shell, the shell is provided with a first air inlet and a second air inlet, a heat exchange air duct is formed between the first air inlet and the second air inlet, and a fan is arranged in the heat exchange air duct; the heat exchange circulating system comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is located in the water tank, and the second heat exchanger is located in the heat exchange air duct; the first air inlet is communicated with an indoor room of the heat pump water heater, and the second air inlet is communicated with an outdoor room through an air pipe; the method comprises the following steps: when a trigger signal is received, it is determined whether the trigger signal is a preset trigger signal; if yes, and a compressor of the heat pump water heater is in a non-running state, then the fan is controlled to rotate. The method of the application can realize that the heat pump water heater does not generate heat, the fan in the heat pump water heater is controlled to rotate to draw indoor air to the outdoor room to realize ventilation, and the use function of the heat pump water heater is increased.

The invention provides a ship waste heat recovery system which comprises an acquisition module, a heat exchange module, a heat exchange module and a cold exchange module, the acquisition module comprises a heat collection circulating coil pipe and a cold collection circulating coil pipe, the heat collection circulating coil pipe is used for collecting waste heat of refrigeration equipment, and the cold collection circulating coil pipe is used for exchanging heat with seawater for cold collection; the energy conversion module comprises a heat pump and a water storage tank which are connected with each other, the heat collection circulating coil pipe and the cold collection circulating coil pipe are connected to a water inlet of the heat pump in parallel, and the heat pump is used for conducting heat exchange on water flow in the heat collection circulating coil pipe or the cold collection circulating coil pipe and water in the water storage tank; the water storage tank is used for supplying water to the heat pump and storing water subjected to heat exchange; the environment sensing module is used for acquiring ship state data; and the control module is used for controlling the acquisition module to switch between heat acquisition and cold acquisition on the basis of data detected by the environment sensing module.

The invention provides an alloy solder and a solder ball. The alloy solder comprises the following components in percentage by weight: 1.0 to 5.0 weight percent of silver, 0.01 to 1.0 weight percent of copper, 0.01 to 1.0 weight percent of nickel, 0.005 to 0.015 weight percent of germanium, 0.05 to 1 weight percent of bismuth, 0.01 to 1.0 weight percent of indium and the balance of tin. The silver can significantly improve the heat-resistant cycle performance and adjust the melting point characteristic. The copper can improve the wettability of the alloy. Nickel can restrain overgrowth of intermetallic compounds on a welding spot interface, and the mechanical reliability of the welding spot is improved. And germanium can improve the oxidation resistance. Bismuth can maintain high shearing force, and meanwhile, the tensile strength and the yield strength of a welding spot are remarkably improved. The indium can improve the toughness of the solder and the binding force of the interface IMC. According to the alloy solder, the alloy variety and content are controlled within the range, and the heat-resistant cycle performance and reliability of the alloy solder can be improved.

The invention relates to the technical field of thermal control coatings, in particular to a liquid metal commercial aerospace thermal control coating adaptive to extreme temperature difference, which comprises a substrate binding layer and a thermal control functional layer, the thermal control functional layer is arranged on the side wall of the substrate binding layer, a thermal circulation pipe is arranged in the thermal control functional layer, and a composite heat conduction layer is arranged on the side wall of the thermal control functional layer. A limiting stabilizing layer is arranged on the side wall of the composite heat-conducting layer. By arranging the multi-layer composite structure and the liquid metal, efficient heat regulation and control in an extreme temperature difference environment are achieved, the substrate combination layer is made of a radiation-resistant material, it is ensured that the structure stability is kept in a strong radiation environment, the liquid metal material in the heat control function layer and a cross circulation plate form a three-dimensional heat conduction network through a disc-shaped heat control circulation pipe, and the heat conduction efficiency is improved. And by arranging the separation cavity, atomic oxygen erosion is effectively blocked, and the inorganic thermal control coating layer of the separation cavity can adjust the surface thermal radiation characteristic.

This utility model provides a heat storage heat exchanger and a refrigerated water purifier, belonging to the technical field of heat exchange equipment. The utility model includes a heat storage tank and a heat storage circulation pump. The heat storage tank has an annular inner cavity, within which a refrigerant coil and a drinking liquid coil are arranged in an inner-outer sleeve configuration. Spiral fins are arranged along the wall of the refrigerant coil, forming spiral-shaped flow guide gaps. The drinking liquid coil is arranged along these spiral-shaped flow guide gaps. The inlet of the heat storage circulation pump connects to one side of the annular inner cavity, and the outlet of the heat storage circulation pump connects to the other side of the annular inner cavity. This heat storage heat exchanger and refrigerated water purifier, through dynamic circulation of the heat storage medium, enhanced heat exchange via spiral fins, and modular integrated design, achieves the core objectives of "high efficiency, energy saving, constant temperature, and easy maintenance" for commercial refrigerated water purifiers, effectively solving the defects of traditional equipment such as low cooling efficiency, uneven temperature, high energy consumption, and inconvenient maintenance.

The application relates to a plastic recycling device for plastic product production and belongs to the technical field of plastic recycling equipment. The device comprises a shell, an inverted conical centrifugal barrel, a heating mechanism and a driving mechanism. The heating mechanism and a feeding circulation mechanism are coaxially arranged in the centrifugal barrel, and the centrifugal barrel is driven to rotate by a main shaft. As the material is heated and bonded to become large, large particles are lifted upwards along the inverted conical inner wall due to centrifugal force, and are thrown into the spiral slide of the inner wall of the shell through the top spiral feeding groove. A hot circulation channel is connected to the side of the discharge channel and is communicated with the necked air inlet hole of the top feeding cylinder. The inverted conical centrifugal barrel is used for granulation and automatic grading and discharging according to particle sizes, and additional screening is not needed. Meanwhile, the unique closed-loop heat circulation system passes through the spiral slide to control the temperature of finished products and sends the cold material back to the feeding end to preheat the cold material, so that the problems of high energy consumption, uneven particles and serious heat loss of traditional equipment are solved, and the device has high practical value.

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.

This utility model discloses a hot and cold circulating water supply mechanism and device, relating to the field of hot and cold circulating water supply mechanisms and devices. It includes a mounting frame, with a hot water storage tank fixedly connected to the front of the mounting frame, and a cold water storage tank fixedly connected to the front of the mounting frame. A refrigeration unit is fixedly connected to the bottom of the cold water storage tank. Both the hot water storage tank and the refrigeration unit are equipped with a mixing temperature control mechanism at their bottoms. Through this mixing temperature control mechanism, a linear regulating valve precisely controls the mixing ratio of hot and cold water, causing the mixed water to impact the turbine blades under gravity, generating vortices and ensuring thorough mixing within the mixing tank. Temperature sensors feed back data to the control panel for closed-loop control, directly producing water at an intermediate temperature. This avoids the energy waste of secondary heating of cold water or secondary cooling of hot water, reducing energy consumption and further avoiding frequent start-ups and shutdowns of the refrigeration unit and heating elements, thus extending equipment lifespan.

The application relates to the technical field of cooling towers, in particular to a high-efficiency water collecting device for a cooling tower, which comprises a water collecting part, the water collecting part is composed of multiple water collecting mechanisms, the water collecting mechanisms are arranged at equal intervals, at least one water collecting groove is arranged in the water collecting mechanism, the water collecting groove is arranged in an inclined mode, the inclination angle of the water collecting groove is less than 5 DEG, the water collecting groove comprises a groove body with a V-shaped cross section, the opening angle of the groove body is 55 DEG-65 DEG, at least one horizontal plate with the same length as the groove body is arranged at the edge of the upper end of the groove body, and a vertical plate is fixedly installed at the edge of the horizontal plate; in the device, the water collecting part is arranged below the filler, air flows upwards from the bottom of the water collector during the operation of the water tower, circulating water is sprayed from top to bottom, the air exchanges heat with the circulating water above through the water collector; the circulating water is completely collected by the water collector, no circulating water exists below the water collector, the heat exchange effect of the water tower is good, water drops are not easy to splash out, and the waste of water resources is reduced.

The utility model discloses a waste heat recovery type wood pulp paper drying device which comprises a sealing box, a sliding rail is arranged in the sealing box, a heat absorption plate is fixedly connected to the top end of the sealing box, a flow guide groove is formed in the lower surface of the heat absorption plate, and a baffle is fixedly connected to the interior of the sealing box. A fan motor is fixedly connected to the interior of the sealing box and the interior of the baffle, and a fan is fixedly connected to the output end of the fan motor; a pressing plate is rotatably connected to the interior of the supporting plate, torsional springs are arranged at the two ends of the pressing plate, a handle is slidably connected to the end of the pressing plate, and a clamping groove is formed in the supporting plate. Through the components, the heat absorbing plate is arranged at the top end of the sealing box, the flow guide groove is formed in the lower surface of the heat absorbing plate, water vapor is condensed on the lower surface of the heat absorbing plate, heat in the heat absorbing plate is blown to the side edge of the baffle in cooperation with the blowing mechanism arranged above the baffle, heat circulation is achieved, and energy loss of the device is reduced.

The application discloses a kind of water heater preheating control method, system, water heater and storage medium, the method includes: in the outlet temperature is greater than the first preset outlet temperature, control water heater stops preheating;Obtain the initial circulating water volume of circulation pipeline and initial preheating water volume;Judge that cold water flow is equal to zero and outlet temperature is greater than preset inlet temperature, control water heater to reopen preheating;According to initial circulating water volume and the first circulating water volume calculated preset preheating water volume obtained;According to initial preheating water volume or preset preheating water volume, circulation pipeline is preheated.The water heater of the application can perceive user cold water use condition, control user to use cold water after starting preheating cycle;According to initial preheating water volume or the preset preheating water volume calculated to circulation pipeline is preheated, realizes that water heater preheating only needs to preheat certain water volume, and the water volume of entire circulation pipeline does not need to be preheated, reaches energy-saving effect.

The invention is suitable for the technical field of transformer cooling, and provides a nuclear power station transformer efficient thermal circulation cooling device which comprises a heat source transferring part, a thermal circulation cooling part and a plurality of dispersion transferring parts, and the heat source transferring part is used for transferring heat generated in the working process of a nuclear power station transformer; the thermal circulation cooling piece is used for efficiently performing thermal circulation cooling on the heat source transferred by the heat source transferring piece through cooling liquid; the plurality of dispersion transferring pieces are mounted in the thermal circulation cooling piece; the dispersion transferring part is used for transferring the cooling liquid in the thermal circulation cooling part; the heat source transferring part comprises a heat source dispersing structure, the heat source dispersing structure comprises a gas guide cover and a dispersing disc, the gas guide cover is used for concentrating a heat source transferred by the cooling heat source transferring part, and the dispersing disc is used for dispersing and guiding the heat source into the heat circulation cooling part; the dispersedly led-in heat source is beneficial to all-around contact with cooling liquid in the heat circulation cooling piece in a short time, the heat exchange efficiency is improved, and the cooling effect is improved.

This utility model discloses a make-up air structure for a board material purification system, including an insulated box with an air inlet and an air outlet connected end-to-end. A heating oil pipe is located at the bottom of the insulated box, with the air outlet below the heating oil pipe and the air inlet at the top of the insulated box. The heating oil pipe is connected to a thermal oil heater. An exhaust system is connected to the insulated box, and the air inlet and outlet are connected via an air supply pipe. A circulating fan is installed on the air supply pipe, and a make-up air pipe is connected to the air supply pipe. This utility model can supplement fresh air into a board material purification system with a thermal circulation structure to maintain air quality and pressure balance within the insulated box.

The invention relates to the technical field of plant culture equipment, in particular to heat-preservation mushroom strain culture equipment which comprises a bottom plate, supporting rods are symmetrically and fixedly connected to the upper surfaces of the two sides of the bottom plate, and the heat-preservation mushroom strain culture equipment further comprises a culture mechanism fixedly installed at the tops of the supporting rods; the heat preservation mechanism is fixedly mounted in the cultivation mechanism. Heat is uniformly diffused into the cavity of the cultivation box above the cultivation plate through the heat dissipation holes in the heat dissipation cover and then is guided out through the air outlet in the top cover, and the bottom of the cultivation box is in a micro-repressing state due to rising of hot air, so that cold air starts to be sucked inwards from the air inlet of the bottom cover, and the temperature of the cultivation box is increased. And cold air is heated by the heating coil and then enters the heat dissipation cover to realize heat circulation, so that the flowing effect of air in the box body is kept while heat preservation is performed on the culture box, and the culture environment of strains is greatly improved.