33results about How to "Reduce the frequency of hydration" patented technology

The invention discloses an air conditioner with a humidifying device. The air conditioner comprises a compressor unit, a four-way valve, an evaporator, a condenser, a throttling device and a humidifying device. The four-way valve is connected with the compressor unit, the evaporator is connected with the four-way valve, the condenser is connected with the four-way valve, and the throttling device and the humidifying device are connected with the evaporator and the condenser. The humidifying device is provided with a water storage container, a refrigerant branch and an atomizing device. The water storage container is used for storing condensate water generated by the evaporator, and the refrigerant branch is used for dividing parts of gaseous high-temperature refrigerants in the heating defrosting process so as to heat water in the water storage container; and the atomizing device is used for atomizing the water in the water storage container so as to humidify the indoor place. Due to the fact that the air conditioner is provided with the humidifying device, through the condensate water generated by the evaporator in the heating defrosting and refrigerating process and stored in the water storage container, the water supplementing frequency is reduced; and the refrigerant branch divides parts of gaseous high-temperature refrigerants in the heating defrosting process so as to heat water in the water storage container, and therefore the power consumption is reduced.

The invention discloses a water inlet control method of a drum washing machine. The water inlet control method comprises the following steps: when clothes are detected to be put into an inner drum, obtaining the weight of the dry clothes; controlling an inlet valve to be opened to feed water to a main washing water level, and calculating the water absorption rate of the clothes; obtaining the water supplementing water yield according to the water absorption rate and the weight of the dry clothes; controlling the inlet valve to supplement water according to the supplementing water yield; and carrying out main washing and controlling a heating tube of the drum washing machine to be opened after water is supplemented. The water inlet control method disclosed by the invention can avoid influences on heating performances and reliability of the heating tube because the heating tube is frequently closed and opened for repeatedly supplementing water. The invention further discloses the drum washing machine.

The invention provides a plug substrate rainproof strawberry seedling culturing method and a special facility, belonging to the strawberry breeding technology. The method is characterized by comprising the following steps: A. setting up a special shed frame facility, arranging a seedling platform, appressing and covering a permeable nonwoven on substrates in plugs and horizontally arranging a weeping pipe and control valves on the nonwoven at intervals; B. planting parent seedlings and controlling the water content of the substrates at the roots; C. when stem buds on creeping stems of the parent seedlings grow to have two leaves and one core, cutting the permeable nonwoven which is close to the stem bud part and is appressed and covered on the substrates in the plugs, planting the stem buds in each plug by passing through the cut and controlling the water content of the substrates at the roots; and D. when the seedlings continuously grow to the seedling age, namely 30-40 days, controlling the water content of the substrates at the roots to be 10-15% and obtaining annual seedlings when the seedlings grow to have four complete leaves and the external diameters of the dwarf stems are not less than seven millimeters. The method and the special facility have the following beneficial effects that: the annual seedlings are prevented from being infected with diseases and suffering from weeds; water is uniformly supplied and saved; and the water content of the seedlings is effectively controlled and the seedlings are promoted to be ripened more than one month earlier.

The invention provides a control method and system of a washing machine, the washing machine, computer equipment and a computer-readable storage medium. The control method of the washing machine includes the steps that a main washing function or rinsing function completion instruction is received, and dewatering is started; whether or not clothes are eccentric in the dewatering process is detected; when the clothes are eccentric, rinsing of the next stage is performed; when the clothes are still eccentric in the last time of dewatering, an alarm is given after at least one time of water replenishing is completed. According to the control method of the washing machine, the number of water replenishing times in one washing process of the washing machine is greatly reduced, the clothes washing completion time is shortened, and water is saved; meanwhile, the clothes rinsing effect is not weakened, and the user's use experience on the washing machine is improved.

The invention discloses a dry-type power transformer capable of efficiently dissipating heat in the technical field of transformers. The dry-type power transformer comprises a transformer body, wherein a net plate is fixedly connected to the lower portion of the transformer body, a bottom plate is fixedly connected to the lower surface of the net plate, a cavity is reserved in the bottom plate, afan is arranged in the cavity, and an air outlet of the fan faces upwards; the top end of the transformer body is fixedly connected with a heat conduction plate, heat dissipation pipes are uniformly distributed in the heat conduction plate, heat dissipation holes are formed in the heat conduction plate, the heat dissipation holes are communicated with one ends of the heat dissipation pipes, the heat conduction plate is fixedly connected with a water containing barrel, and the water containing barrel is communicated with the other ends of the heat dissipation pipes. According to the scheme, theproblems that an existing dry-type power transformer is poor in heat dissipation effect, and the transformer cannot work normally possibly due to the too high temperature are solved.

The invention discloses a clothes material identification method, a washing machine control method and a washing machine. The method comprises the following steps of calculating the moisture content of clothes through secondary weighing; and determining the material of the clothes according to the moisture content of the clothes and a preset value so as to control the washing machine according to the material of the clothes. On the premise that the hardware cost is not increased, the material of the clothes in the washing machine can be identified by using the existing function of the washing machine completely, and the washing machine is reasonably controlled according to the material of the clothes.

The invention relates to the technical field of water vapor recycling of cooling towers in power plants and chemical plants, in particular to a water collector blade based on a separation membrane, a water collector and a cooling tower. The water collector blade based on the separation membrane comprises a hydrophilic device, and the separation membrane with hydrophilic and hydrophobic functions is movably arranged at the outer side of the hydrophilic device. The side, with the hydrophilic function, of the separation membrane is attached to the hydrophilic device, the side, with the hydrophobic function, of the separation membrane deviates from the hydrophilic device, and liquid drops can penetrate through the separation membrane to enter the hydrophilic device. According to the water collector blade based on the separation membrane, the hydrophilic device arranged in the water collector blade is used for collecting moisture of airflow flowing through the hydrophilic device, and the separation membrane which is arranged outside the hydrophilic device and has opposite wettability physical performance is used for collecting moisture of airflow flowing out of the water collector blade. The recovery rate of water vapor is improved to the maximum extent, and the secondary entrainment phenomenon of liquid drops is reduced.

The invention discloses a mobile environmental sanitation dissolved air washing and sprinkling vehicle, and belongs to the technical field of cleaning instruments, the mobile environmental sanitation dissolved air washing and sprinkling vehicle comprises a vehicle body, a sprinkling assembly and a mixing assembly, the sprinkling assembly comprises a liquid storage container arranged on the vehicle body, and the liquid storage container is used for storing liquid to be sprinkled; and the mixing assembly is communicated with the liquid storage container and comprises a gas-liquid mixer used for mixing liquid and air. The invention further provides a control method of the mobile environmental sanitation dissolved air washing and sprinkling vehicle. According to the method, air is dissolved and injected into water through the air-liquid mixer to generate microbubbles, the water flow has the foaming effect, the scouring force of the water flow is improved, the utilization rate of the water is increased, the water supplementing frequency is reduced, and the working efficiency is improved; the pressure of the liquid storage container and the water outlet pressure are increased through the air-liquid mixer, and the purposes of saving water and enhancing the road surface flushing effect are achieved. The product has obvious effect and is suitable for wide popularization.

The invention belongs to the technical field of engineering vehicles, and relates to a water-saving washing tank for diesel engine exhaust gas. The washing tank includes a water washing box, an air inlet pipe and an air outlet pipe, wherein the water washing tank is divided into a water feeding chamber and a water supplementing chamber through a separation plate, the air inlet pipe is inserted into the deep portion of the water inlet chamber, and the air outlet pipe is connected with the upper portion of the water washing tank. The water feeding chamber is internally provided with a middle cylinder, an outer cylinder and a water retaining cover, wherein the middle cylinder and the outer cylinder are vertically arranged on the bottom, and the air inlet pipe is sleeved with the water retaining cover, the caliber of the middle cylinder is larger than that of the air inlet pipe and the highest position is higher than the lowest point of the air inlet pipe; the bottom of the outer cylinderis provided with a water through hole, the caliber of the outer cylinder is larger than the caliber of the middle cylinder, the outer cylinder is higher than the upper edge of the middle cylinder, andthe water retaining cover is located above an upper outlet of the outer cylinder. This structure makes tail gas undergo many turning points when entering the water feeding chamber, the tail gas velocity is reduced, water mist is reduced, and the water volume is completely separated. An experience shows that the water supplementing frequency of the water washing tank is reduced to once every fourhours, and the situation that most of the production time is occupied by the supplementing time is avoided.

The invention belongs to the technical field of water surface evaporation measurement, and discloses a water surface evaporation capacity monitoring system and method. According to the system and method, an evaporation measurement module detects the water level height of an evaporation container, and transmits the measured water level height to a control module; the control module acquires the water level adjustment amount according to the pre-rainfall, the pre-evaporation amount and the measured water level height, and sends the water level adjustment amount to a water level adjustment module; and the water level adjusting module performs water supplementing or water draining on an evaporation container according to the water level adjustment amount. The problem that an existing water surface evaporation capacity measuring error is large can be solved, the water level height in the evaporation container can be automatically adjusted, the labor cost is reduced, and the water surface evaporation capacity measuring precision can be improved.

A healthful, energy-saving and environment-friendly humidifier is characterized by comprising a special-shaped water storage tank and an evaporator made of folded absorbent paper. The special-shaped water storage tank is a plastic or metal product and comprises a flat bottom, a vertical outer wall and a water tank with an open upper plane, the projection of the special-shaped water storage tank in a vertical view is similar to a fishbone, and two symmetrical side-wing water tanks on two sides of a main tank are communicated with each other by the middle main tank. The evaporator is made of the folded absorbent paper, fold lines are parallel to one side of rectangular filter paper, the filter paper is repeatedly folded in forward and reverse directions to form a folding fan, and the folding fan is vertically inserted into the side-wing water tanks after being stretched naturally. When the humidifier is used, water is filled in the water tank, and purposes of naturally evaporating moisture and humidifying indoor air can be achieved after the water tank is placed on a heater. The humidifier has the advantages that the humidifier is energy-saving, environment-friendly, silent and efficient, and is free of white dust pollution and long in service life.

The invention discloses a production method of non-burning crushed stone-shaped gold foil light ceramsite. The key points of the technical scheme are: stirring and mixing the ingredients of non-burning crushed stone-shaped gold foil light ceramsite, extruding granulation, steaming After curing, steam drying, crushing and sieving, it is packaged as non-burning crushed stone-shaped gold foil lightweight ceramsite. The ingredients of unfired crushed stone-shaped gold foil lightweight ceramsite are gold foil, white cement, acidified attapulgite clay, acidified zeolite, powdered attapulgite foaming agent, light calcium carbonate, hollow glass microspheres and titanium White powder composition. The non-burning crushed stone-shaped lightweight ceramsite produced by the production method of the present invention has the characteristics of glittering gold, good light weight and strength, large specific surface area, excellent air permeability, high porosity and water absorption; the burn-free crushed stone-shaped gold foil Lightweight ceramsite can ensure good growth and development of plants, high survival rate and longer life span, and can greatly reduce the frequency of water replenishment. It is suitable for landscape engineering, home gardening and preparation of soilless cultivation substrates.

The invention discloses an efficient planting method of hemerocallis citrina, and relates to the technical field of hemerocallis citrina planting. The method includes the following steps of 1, land selection, wherein a land with the slope greater than 5 degrees is selected as a planting land of hemerocallis citrina; 2, soil preparation, wherein the planting land is ploughed, the ploughing depth is20-25 cm, a hydrophobic net is laid at the bottom of ploughed soil, a mixed material is spread on the hydrophobic net, then soil is used for covering and burying, the mixed material includes, by volume, 95-98 parts of an organic fertilizer and 3-5 parts of a superabsorbent polymer, and 2100-2400 kg of the mixed material is spread per mu of the land; 3, planting, wherein hemerocallis citrina plants are transplanted in the planting land after soil covering, and the transplanting depth of the hemerocallis citrina plants is 18-22 cm; 4, management, wherein after transplanting of the hemerocalliscitrina plants, and daily management of water, a fertilizer, weeding and disease and pest control is performed. Through the arrangement of the hydrophobic net and the mixed material, a trench is not needed, rotten roots of the hemerocallis citrina plants are avoided and meanwhile the utilization rate of rainwater is improved.

The invention discloses a hydrogen flame ionization detector system with ultralow energy consumption and material consumption, and belongs to the technical field of gas chromatograph equipment. The detector system comprises a detector body, the detector body comprises a base, a nozzle, a collector, a catalytic oxidation reactor and a thermal insulation layer, the nozzle and the collector are arranged on the base, the collector is located above flame generated by the nozzle, the catalytic oxidation reactor and the base are integrally formed, the catalytic oxidation reactor is located on the outer side of the collector, the outer sides of the base and the catalytic oxidation reactor are sleeved with heat preservation layers, the detector body is used for being matched with the heat exchanger and the electrolysis reactor to detect sample gas to be detected, the base is used for installing the nozzle and the collector, and the nozzle is used for spraying out flames generated in the combustion process of hydrogen and combustion-supporting gas. Heat of tail gas of the detector body and liquefaction latent heat of water vapor in the tail gas are recovered through heat exchange, system energy consumption is reduced, and environment friendliness is achieved.

The invention discloses a negative pressure and steam disinfection device for a motor home, and relates to the field of disinfection for the motor home, the negative pressure and steam disinfection device comprises the motor home, a steam disinfection device and a negative pressure device, and the steam disinfection device comprises a water collecting tank, a steam generator, a first connecting pipe and an atomization box. Firstly, the solar panel can absorb solar rays and convert solar energy into electric energy to be used by the device and other equipment of the vehicle, secondly, the solar panel has the effect of a water guide plate and can guide water into the water collecting tank, the filter screen can filter rainwater and prevent impurities from entering the water collecting tank, the solar panel reduces the opening area of the water collecting tank, and the water collecting tank is convenient to use. The evaporation amount of rainwater in the water collecting tank can be reduced, the rainwater in the water collecting tank can be prevented from being splashed out when a vehicle bumps, water resources are provided during rainwater collection and steam disinfection, water in a water tank of the vehicle does not need to be used, the water supplementing frequency of the motor home is reduced, and people can use the motor home conveniently.

The invention provides a spraying method of a roller washing machine. The method includes the steps that a washing machine water inlet program is started; and a washing machine spraying program is started. The spraying program includes the steps that S31, spraying frequency n is recorded, wherein an initial value of spraying frequency n is 0; S32, spraying frequency n and preset spraying frequencyN are obtained, when n is smaller than N, the step S33 is executed, and otherwise, the spraying process is ended; S33, an inner barrel and a spraying structure integrally rotate clockwise or anticlockwise at a rotating speed R2 for time t1, then the inner barrel and the spraying structure integrally rotate reversely at a rotating speed R3 for time t2, and the spraying structure rotates to drive poking pieces to move to poke up water for spraying; and S34, when spraying frequency n is equal to n+1; the spraying structure rotates to drive the poking pieces to move to poke up the water for spraying, so that the water can be sprayed to clothes in the inner barrel, the clothes soaking time is shortened, the water supplementing frequency is reduced, and the clothes washing efficiency is improve; and the water can be sprayed to a doorseal and a glass door of the washing machine, so that detergent foam remaining at the doorseal and the door glass can be cleaned, and the doorseal is preventedfrom mildewing and stinking.

The invention discloses a method for preparing earthworm fertilizer by circular process of tea leaves with earthworm. The method comprises the following steps: compounding cow dung with tea leaves; regulating the moisture content of materials; piling the materials in a fermentation tank; adding earthworms; paving a straw mattress above the fermentation tank to carry out compositing for 40-60 days, thereby completing primary composting; separating earthworm excrement from the earthworms, and moving and taking the earthworm excrement with 1 / 3-1 / 2 thickness from the material upper layer to obtain tea leave earthworm excrement; supplementing materials with equivalent thickness of materials into the fermentation tank to uniformly mix residual materials in the fermentation tank, regulating the moisture content of the materials, carrying out next compositing for 15-20 days, separating the earthworm excrement from the earthworms, and moving and taking the earthworm excrement with 1 / 3-1 / 2 thickness from the material upper layer to obtain tea leave earthworm excrement; re-supplementing materials with equivalent thickness of materials into the fermentation tank, and carry out next-time recycling to prepare the tea leave earthworm fertilizer. According to the method, the temperature and humidity range is relatively wide, nutrient loss is avoided, and the earthworms are ensured to be continuously processed to continuously obtain the tea leave earth fertilizer with relatively high nutrient content in a circulating mode.

The invention relates to the technical field of air conditioners and discloses an air conditioner. The air conditioner comprises an air conditioner body and a water purification module. The air conditioner body comprises a water pan and a water drainage pipeline communicated with the water pan; and the water purification module comprises a water supply assembly, and the water supply assembly is provided with a condensate water inlet communicated with an upstream pipe section of the drainage pipeline. According to the air conditioner provided by the embodiment of the invention, the water supply assembly of the water purification module communicates with the drainage pipeline of the water pan, so that at least part of condensate water collected by the water pan and drained by the drainage pipeline can flow into the water supply assembly, and the part of divided condensate water can serve as a supplementary water source for purification of the water purification module; and the frequency of supplementing and adding water to the water purification module by a user is effectively reduced, and the operation burden of the user is reduced.

The invention relates to a device and a method for reducing dissolved oxygen in cold water in a generator, belonging to the field of power generation. The device comprises an internal cold water tankand is characterized by further comprising a catalytic tank. A catalyst frame body is arranged in the catalyst tank. A hanger is arranged between the catalyst frame body and the inner wall of the catalyst tank. A communicating pipe is arranged between the catalytic tank and the internal cold water tank. The catalytic tank is arranged above the internal cold water tank, hydrogen leaked from a stator chamber of the generator in the internal cold water tank and internal cold water dissolved oxygen diffused from internal cold water are diffused into the catalytic tank through the communicating pipe. The hydrogen and the oxygen are subjected to combination reaction under the action of a catalyst to generate water, the oxygen content in the internal cold water tank and the catalytic tank is reduced, causing the dissolved oxygen in the internal cold water tank to continuously diffuse out, the dissolved oxygen continues to react with the hydrogen under the action of a palladium catalyst to gradually reduce the dissolved oxygen in the internal cold water, and finally the purpose of reducing the dissolved oxygen in the internal cold water can be achieved.

The invention belongs to the technical field of kidney bean breeding, and particularly relates to a method for producing a kidney bean or lentil mutant by using EMS mutagenesis. The method includes seed disinfection treatment, germination treatment, mutagenic treatment and field planting, wherein the germination treatment step includes placing sterile seeds in a germination matrix flatly, and making the germination substrate liquid surface lower than the upper surface of the sterile seeds, so that the sterile seeds germinate, and obtaining germinated plant bodies after 1-2 young leaves are grown; wherein the mutagenic treatment step includes adding an EMS solution to per kilogram of germination substrate, using the EMS solution to mutagenize the germinated plant bodies, taking out the germinated plant bodies, placing the germinated plant bodies in an MS liquid culture medium to perform photoperiod culture for 5-7 days, adding an EMS solution into every kilogram of MS liquid culture medium, and using EMS to continue to mutagenize the germinated plant bodies to obtain the mutagenized plant bodies. The method is an efficient mutagenesis method for red kidney beans, which improves theefficiency of mutagenesis, reduces the amount of carcinogens such as the EMS, and reduces the health threat to breeding workers.

The invention discloses a novel garbage collection and transportation vehicle in the field of garbage collection and transportation. The novel garbage collection and transportation vehicle comprises a carriage, and an overturning mechanism used for lifting a garbage can and overturning and dumping garbage in the garbage can into the carriage is arranged beside the carriage; a dustbin is arranged on one side in the compartment, and a water tank is arranged on the other side in the compartment; and a drying and disinfecting mechanism is arranged at the top of the water tank, and the water tank and the drying and disinfecting mechanism extend to the garbage can through a water pipe and a drying pipeline correspondingly to flush and dry the overturned and dumped garbage can. After garbage in the garbage can is poured out, the water pipe is used for spraying water to clean the garbage can, and then the drying pipeline is used for drying and disinfecting the garbage can. On the basis of cleaning the garbage can, the garbage can is further cleaned and is dried and disinfected. In this way, breeding and reproduction of bacteria can be effectively inhibited, the surrounding environment of a community is cleaner, convenience is brought to travel of pedestrians, and meanwhile the city appearance is effectively improved.

The invention discloses a wind and sand comprehensive prevention and control method. The wind and sand comprehensive prevention and control method is completed by using wind and sand comprehensive prevention and control equipment so as to realize wind and sand comprehensive prevention and control. The wind and sand comprehensive prevention and control equipment comprises a stainless steel pile casing; and the stainless steel pile casing comprises water tanks, the whole stainless steel pile casing is formed by jointly welding, tightening and butting a left semicircular cover and a right semicircular cover, a semicircular water tank is welded to the top end of the inner space of each semicircular cover in a hanging and supporting mode, a valve mechanism is welded to the bottom of each water tank in a communicating mode, and the stainless steel pile casing is butted and sleeves the tree plant. The stainless steel pile casing can shield and prevent soil in the stainless steel pile casing from being irradiated by sunlight, the evaporation capacity is reduced, then the water amount for irrigating tree plants is reduced, the water supplementing frequency of the two water tanks is reduced, and the labor intensity of workers is relieved.

The invention discloses a rainwater permeation system based on an ecological parking lot, which comprises a first anti-settling water-permeable cloth layer, a plain soil base layer, a porous asphalt water-permeable layer, a second anti-settling water-permeable cloth layer, a pumice water-permeable bottom base layer, a sand-free macroporous concrete base layer, a water permeation layer, a medium sand leveling layer and an 8-shaped water-permeable grass planting brick layer which are sequentially arranged from bottom to top. Filtering and dredging pipes are arranged on the 8-shaped water-permeable grass-planting brick layer at intervals, a filtering surface layer is arranged at an opening in the top of each filtering and dredging pipe, and the filtering and dredging pipes sequentially penetrate through the 8-shaped water-permeable grass-planting brick layer and the medium sand leveling layer from top to bottom and then communicate with the interior of the water seepage layer. According to the rainwater permeation system based on the ecological parking lot and the preparation method, loss of sandy soil can be effectively prevented through the two anti-sinking permeable cloth layers, roadbed sinking is avoided, the plant growth environment of the ecological parking lot is improved, the plant water supplementing frequency is reduced, and the system is good in breathability, water permeability, adhesion and water retention and high in supporting strength; and the method is green and environment-friendly and can improve the local thermal environment.

The invention discloses a water-loss prevention and short-circuit prevention bag type alkali storage battery. The water-loss prevention and short-circuit prevention bag type alkali storage battery comprises a battery shell, a pole plate, a battery cover, a positive binding post and an air plug, wherein the positive binding post and the air plug are arranged on the battery cover, and a layer of polypropylene punched felt is arranged between a bag type positive pole plate and a bag type negative pole plate. An existing polypropylene mesh grid partition plate is substituted by the polypropylene punched felt, the positive pole plate and the negative pole plate of the battery are separated, the bag type alkali storage battery has excellent acid and alkali resistant performance, is high in strength and is difficult to deform, and internal short circuit is prevented as long as the felt is not punched even the pole plates are expanded and deformed; meanwhile, the polypropylene punched felt is good in porosity and air permeability, the internal pressure of the battery can be reduced by gas recombination efficiency during the charge-discharge process, and the electrolyte diffusion resistance is small; and moreover, the bag type alkali storage battery has a certain liquid absorption and storage capability, the water supplement frequency of an electrolyte is reduced, and particularly, convenience is brought to the battery applied under a remote occasion or an unattended occasion.

The embodiment of the invention relates to a cleaning device washing method and device, a cleaning device and a storage medium. The method comprises the steps that the weight of a to-be-washed object is obtained; determining the water absorption capacity of the to-be-washed object; determining the water supplementing amount of the to-be-washed object according to the weight of the to-be-washed object and the water absorption amount of the to-be-washed object; and the cleaning equipment is controlled to supplement water according to the water supplementing amount, and washing operation is executed. Therefore, the cleaning equipment can supplement water according to requirements by calculating the required water inlet amount, so that the water supplementing frequency is reduced, the washing time is shortened, and the service life of the valve is prolonged.

The invention belongs to the technical field of generating devices and relates to a steam generating device for an azotometer. The steam generating device comprises an outer shell, an inner case, an upper cover and an assembly water level monitor; the outer shell is provided with an evaporation furnace outer cavity, an installation flange and an outer cavity water inlet; the installation flange isintegrally formed at the top of the evaporation furnace outer cavity; the outer cavity water inlet is integrally formed at the left side of the bottom of the evaporation furnace outer cavity; the inner case is arranged at the middle of the inner wall of the outer shell; a steam outlet is formed in the upper cover; the upper cover is fixed at the top of the outer shell and is used for sealing theouter shell; and the assembly water level monitor is arranged on the outer shell, the inner case and the upper cover and is used for detecting data information. With the steam generating device of theinvention adopted, the synchronism of the water level of the inner cavity and the water level of the outer cavity of an evaporation furnace is guaranteed, a real water level in the furnace can be accurately monitored, the service lives of instruments are prolonged, and power-off protection can be achieved timely.