414 results about "Steam system" patented technology

The invention provides a cooking utensil superheated steam system and a temperature control method thereof, and relates to the technical field of steam cooking. The superheated steam system of the cooking utensil comprises the cooking utensil, a steam module, an ultrasonic heating module, a temperature monitoring module, a cooking data acquisition module, a data analysis module, a model prediction module, a display module, a dynamic adjustment heating strategy, a waste heat recovery module and a preheating box. Ultrasonic vibration is used for assisting heating, water molecules rapidly vibrate in a microwave field to generate heat, the waste heat recovery module captures heat generated in the cooking process through a heat exchanger and is used for preheating the next batch of food, the energy utilization efficiency is remarkably improved, energy waste and carbon emission are reduced, the heating strategy is dynamically adjusted, and the energy utilization rate is increased. According to the real-time sensor data and the prediction model, the heating power, the steam flow and the heating time parameters are automatically optimized, unnecessary energy consumption is avoided, and accurate temperature control and energy consumption optimization are achieved.

A turbine engine for an aircraft including a combustor, a turbine, and a steam system. The combustor generates combustion gases. The turbine receives the combustion gases and is drivingly coupled to a shaft. The steam system includes a boiler, a superheater, and a steam turbine. The boiler receives water and is fluidly connected to the combustor to receive a first portion of the combustion gases from the combustor and to boil the water to generate steam. The superheater is located downstream of the combustor to receive a second portion of the combustion gases from the combustor and to heat the steam. The steam turbine is fluidly coupled to the superheater to receive the steam from the superheater and to rotate the steam turbine. The steam turbine is drivingly coupled to the shaft.

The invention provides a PLC-based biomass gasification industrial steam full-automatic intelligent control system and method. The system comprises a data acquisition module, a modeling identification module, a multi-objective optimization module, a rolling prediction control module, a coordination execution module, a self-adaptive correction module and an abnormal fault tolerance and safety control module. The system collects operation data of a feeding system, a gasification furnace, a boiler, a steam-water system and an environmental protection system in real time through a PLC platform, a dynamic coupling model of a combustion side, a steam-water side and an environmental protection side is established, and a multi-target constraint optimization model with stable steam pressure, up-to-standard emission and minimum energy consumption as targets is constructed. According to the invention, unattended operation of the biomass gasification industrial steam system is realized, the system has the advantages of high control precision, low energy consumption, stable emission and strong fault-tolerant capability, and the intelligence and safety of the industrial steam system are obviously improved.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses a fine processing mixed bed failure situation situation sensing system and method, the sensing system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Situation awareness of mixed bed failure is achieved by establishing a layered monitoring system, and long-term stability of water quality of a water vapor system of a power plant is guaranteed.

A turbine engine for an aircraft. The turbine engine includes a core turbine engine and a steam system. The steam system extracts water from combustion gases, vaporizes the water to generate steam, and injects the steam into a core air flow path of the core engine to add mass flow to core air. A core hot gas path component may be fluidly connected to a hot gas path that routes combustion gasses from the combustor. The core turbine engine may also include a turbine fluidly connected to the hot gas path to receive the combustion gases. The turbine may include a turbine airfoil. Each of the core hot gas path component and the turbine airfoil includes a combustion-gas-facing surface facing the hot gas path. A hydrophobic coating is formed on the combustion-gas-facing surface, reducing wetting of water vapor within the combustion gases on the core hot gas path component.

The present invention relates to the technical field of steam supply operation. Disclosed are a steam supply operation optimization method and system for an auxiliary steam system. The method comprises: calculating a comprehensive energy efficiency indicator of an auxiliary steam system, carrying out energy efficiency evaluation, and establishing an auxiliary steam system steam supply scheduling model; carrying out dynamic scheduling optimization and adaptive adjustment of auxiliary steam supply; carrying out energy cascade utilization of steam supply operation of the auxiliary steam system, and monitoring an operating condition of each stage of the auxiliary steam system in real time; and establishing an optimization feedback mechanism, and adjusting a steam supply strategy of the auxiliary steam system and a control parameter. In the present invention, an energy efficiency evaluation result is converted into a specific scheduling strategy, thereby achieving more scientific and reasonable steam supply scheduling of the auxiliary steam system, enabling flexible adjustment according to actual requirements, satisfying steam supply requirements under different working conditions, and achieving accurate control over auxiliary steam supply. Cascade utilization is carried out on steam supply operation of the auxiliary steam system, thereby improving energy utilization efficiency to the maximum extent and improving the energy efficiency level of the auxiliary steam system.

The energy storage steam system comprises a main flue, a fused salt heat exchange module and a water heat exchange module are arranged in the main flue, the fused salt heat exchange module comprises a salt heat exchanger, the salt heat exchanger is arranged in the main flue, and the water heat exchange module is arranged in the main flue. The inlet end and the outlet section of the salt heat exchanger communicate with a cold salt tank and a hot salt tank through conveying pipelines correspondingly, the water heat exchange module comprises a water quality heat exchanger, the water quality heat exchanger is arranged in a main flue, and the inlet end and the outlet section of the water quality heat exchanger are arranged in a condensation water tank and a deaerator through conveying pipelines correspondingly; the output end of the deaerator communicates with the fused salt-steam generating device, and the cold salt tank and the hot salt tank communicate with the fused salt-steam generating device. Fused salt is used as a high-temperature heat transfer and storage medium, water is used as a heat transfer and storage medium of a low-temperature area, intermittent flue gas or process gas waste heat is recycled, then the recycled heat is used for generating high-parameter steam, and the requirements for external driving, heat supply, power generation or heat supply and the like are met.

The utility model provides a steam system which comprises a steam generator and an inner container, and the steam generator is used for generating steam; the steam pipe fitting is arranged on the inner container in a penetrating mode, and one end of the steam pipe fitting is connected with the steam generator; the flow blocking piece is arranged at the other end of the steam pipe fitting, at least part of the flow blocking piece and a steam outlet of the steam pipe fitting are opposite and arranged in a spaced mode, a flow blocking channel is defined by the flow blocking piece and at least part of the steam pipe fitting, and the flow blocking channel is communicated with a cavity of the inner container. And steam in the steam pipe fitting passes through the flow blocking channel and then enters the cavity of the inner container. By means of the technical scheme, the technical problem that in the prior art, noise of a steam system is large can be solved.

A turbine engine includes a compressor section for providing a compressed air flow, a fuel system for providing a primary combustor fuel supply, and a secondary combustor fuel supply. A primary combustor, located downstream of the compressor section, combusts the compressed air flow and the primary combustor fuel supply to generate primary combustion products. A turbine section, located downstream of the primary combustor, includes a turbine and a secondary combustor that further combusts the primary combustion products and the fuel from the secondary combustor fuel supply. A steam system provides a steam supply to the secondary combustor. The secondary combustor further combusts the primary combustion products and the secondary combustor fuel supply to generate secondary combustion products, and the turbine section is rotated by the secondary combustor steam supply and the inter-turbine combustion products.

A gas turbine engine includes a fan, a combustor positioned in a core air flowpath that generates combustion gases, a steam system that extracts water from the combustion gases and generates steam, and a gearbox assembly. The steam system includes water storage devices that store the water therein. The water storage devices include a first state in which a level of the water increases or is maintained and a second state in which the level of the water decreases as the water flows through the water storage devices. The gearbox assembly includes a gearbox and a gutter for collecting a gearbox lubricant scavenge flow from the gearbox. The gutter is characterized by a lubricant extraction volume ratio between 0.01 and 0.3, inclusive of the endpoints. The lubricant extraction volume ratio defined by:VGVG⁢B·VGis a gutter volume of the gutter and VGB is a gearbox volume.

The invention relates to the technical field of food processing equipment, in particular to an intelligent pastry continuous leavening and steaming system which comprises a leavening mechanism and a steaming mechanism and further comprises a conveying assembly, a steam supply system and a control system. The conveying assembly penetrates through the leavening mechanism and the steaming mechanism and is used for sequentially conveying pastries into the leavening mechanism to finish leavening and conveying the pastries into the steaming mechanism to finish steaming, and the leavening mechanism and the steaming mechanism are each of a modular structure and are composed of a plurality of independent leavening units or steaming units which are in butt joint front and back; a liftable fermentation section upper cover device is arranged at the top of the fermentation mechanism, a liftable steaming section upper cover device is arranged at the top of the steaming mechanism, the fermentation section upper cover device and the steaming section upper cover device are each provided with a drainage structure, and each drainage structure comprises a flow guide plate and a collecting groove; the control system is electrically connected with the leavening mechanism, the steaming mechanism, the conveying assembly and the steam supply system. The pastry food leavening and steaming device can improve the leavening and steaming efficiency of pastry food.

The present invention relates to a heat pump steam heating device and a control method thereof. The heating device comprises a heat pump system and a steam system. The heat pump system comprises a heat pump compressor, a heat pump condenser and a heat pump evaporator connected in sequence. The heat pump evaporator is connected to the heat pump compressor. The steam system comprises a gas-liquid separator, a steam compressor and a heat-using mechanism connected in sequence. The inlet end of the gas-liquid separator is connected to the liquid outlet of the heat pump condenser. The heat pump compressor is connected to a first frequency converter, and the steam compressor is connected to a second frequency converter. When the heat load of the heat-using mechanism changes, the steam compressor and the heat pump compressor are coupled and frequency-converted, so that the heat of the water vapor entering the heat-using mechanism and the heat load of the heat-using mechanism are balanced. Compared with the prior art, the present invention controls the frequency coupling of the compressor so that the two operate in coordination, and the balance between the heat supply of the heat-using mechanism and the required heat load is achieved as quickly as possible, the temperature change fluctuation is reduced, and the high energy efficiency ratio operation of the device is achieved.

A turbine engine for an aircraft including a turbo-engine, a fan having a fan shaft coupled to the turbo-engine, and a steam system. The steam system is fluidly coupled to a core air flow path at a plurality of steam injection locations to selectively inject steam into the core air flow path at each of the plurality of steam injection locations, using a steam flow control valve. The plurality of steam injection locations include (i) an upstream steam injection location located to inject steam into the core air flow path at a primary combustion zone of a combustor or upstream thereof and (ii) a downstream steam injection location located to inject steam into the core air flow path downstream of the primary combustion zone.

The embodiment of the invention provides a multi-dimensional detection method and system for steam-water pollution, and the method comprises the steps: setting sampling points at target positions of condensed water, feed water, boiler water and a steam system, and detecting sampling parameters at the sampling points; identifying a water quality abnormal signal based on the sampling parameter and a preset threshold value of the water quality index; associating the water quality abnormal signal with target equipment and carrying out chemical analysis so as to position a pollution source; monitoring the thermotechnical state of the target equipment in real time, collecting thermotechnical parameters, and establishing a linkage model of the thermotechnical parameters and the water quality indexes to identify the influence of abnormal working conditions on the water quality; according to the influence result of the abnormal working condition on the water quality, the water delivery module, the shaft seal module and the dosing module are subjected to sealing performance test and purity detection so as to identify hidden source abnormal signals; and performing multi-dimensional analysis on the water quality abnormal signal, the pollution source, the abnormal working condition and the hidden source abnormal signal, and building a fault tree to generate a pollution source priority list and dynamically adjust a pollution discharge strategy.

The invention discloses a ResFCN-3DVar-based nuclear power plant main steam system modeling parameter inversion optimization method, and the method comprises the steps: defining main steam system modeling parameter data, and generating a data sample; a residual error full connection network (ResFCN) is constructed, and optimization training is carried out on the residual error full connection network (ResFCN); a data assimilation model is constructed based on a three-dimensional variational method (3DVar), an objective function is optimized by using an iterative method, and finally modeling parameters of the main steam system are inverted. And evaluating the data assimilation performance, and verifying the noise interference resistance effect of the data assimilation result by comparing the analysis value, the observation value and the true value. According to the method, deep learning and data assimilation technologies are effectively fused, and remarkable advantages are shown in the aspects of model modeling parameter inversion and simulation precision optimization.

The utility model relates to the technical field of energy conservation of air source heat pumps, in particular to a cascade type air source heat pump straight-out steam unit. The unit comprises a low-temperature-stage heat pump system circulation assembly, a high-temperature-stage heat pump system circulation assembly and a steam system assembly. The low-temperature-stage heat pump system circulation assembly comprises a low-temperature gas-liquid separator, a low-temperature-stage compressor, a heat release pipe of the intermediate heat exchanger, a low-temperature liquid storage tank, a low-temperature throttling element and an air heat exchanger. The high-temperature-stage heat pump system circulation assembly comprises a high-temperature gas-liquid separator, a high-temperature-stage compressor, a high-temperature water heat exchanger, a high-temperature liquid storage tank, a high-temperature throttling element and a heat absorption pipe of an intermediate heat exchanger. The steam system assembly comprises a steam-liquid separator, a constant-pressure make-up pump, a circulating pump, an electric control valve, a steam outlet flow meter, a flow control valve and a one-way valve. By optimizing the structure of the unit, the effects of directly discharging steam and stably discharging steam can be achieved.

The utility model provides an intelligent automatic continuous steaming machine, which belongs to the technical field of food processing, and comprises a feeding module provided with a food material feeding end and an inlet end box body, a first gas collecting hood arranged on the inlet end box body, and a first heat exchanger arranged in the first gas collecting hood; the discharging module is provided with a food material discharging end and an outlet end box body, a second gas collecting hood is arranged on the outlet end box body, and a second heat exchanger is arranged in the second gas collecting hood; the steaming module comprises a steaming chamber, and a water supplementing system and a steam system are arranged in the steaming chamber; the conveying module comprises a conveying mesh belt used for bearing cooked food materials, the water outlet end of the water supplementing system is located above the conveying mesh belt, and the air outlet end of the steam system is located between the upper side and the lower side of the conveying mesh belt. Through the cooperation of the water supplementing system and the steam system, the taste of rice is improved.

The utility model relates to a low-energy-consumption hot air balance system for drying toilet paper, which comprises a drying cylinder, a hot air cover, a hot air system and a steam system. The hot air cover is arranged above the drying cylinder in a sleeving manner; the hot air system comprises a heat exchanger, an air heater and an exhaust fan which are sequentially connected through a hot air pipeline, and hot air generated by the hot air system penetrates through the hot air cover and then is exhausted; the steam system comprises a steam pipeline connected with the drying cylinder and a condensed steam buffer tank for storing condensed steam; the top of the condensed steam buffer tank is connected with a steam recovery pipeline, and the bottom is connected with a heat exchanger of the hot air system through a condensed water pipeline. According to the hot air balancing system, heat energy in the papermaking process can be fully utilized, energy consumption needed in the drying process is reduced, and the production cost of enterprises is greatly reduced.

The invention discloses a nuclear power plant steam generator secondary side state setting system and method. The system comprises an air compressor, a steam generator and a main steam system. The steam generator comprises a secondary side, a first hole site located in the lower portion of the secondary side, a second hole site located in the upper portion of the secondary side and a steam outlet located in the top of the secondary side. An inlet of the main steam system is connected with the steam outlet; the air compressor is connected with the first hole site; when the secondary side of the steam generator is dried, the air compressor is used for filling dry compressed gas through the first hole site, and the main steam system and the second hole site are used for exhausting. When the secondary side is dried, the boundary of the main steam system is contained in the drying pressure range, although the state setting of the main steam system is increased, the main steam system is located outside the steam generator, no irradiation dose exists, operation is convenient, and foreign matter cannot be introduced even if operation is not conducted in the steam generator. The main steam system and the second hole position exhaust jointly, so that the drying efficiency is greatly improved.

The invention discloses a pyrolysis gas-assisted thermochemical cycle hydrogen production test system and an operation method. The test system comprises a steam system, a gas path system, a reaction system and a separation detection system. The reaction system adopts a first reaction system and a second reaction system which are arranged in parallel and can alternately carry out reduction and oxidation reactions. And the gas path system can selectively introduce pyrolysis gas or nitrogen into the reaction system through valve switching. According to the operation method, by optimizing water vapor oxidation conditions, an air oxidation stage in a traditional process is omitted, and energy consumption is reduced; and nitrogen purging is adopted during switching of the reaction stages, so that the explosion risk is thoroughly eliminated, and the safety is guaranteed. According to the invention, continuous, efficient and safe circulating hydrogen production is realized, and a reliable scheme is provided for industrial application.

A method for controlling a process comprising a steam system coupled to a reactor system, wherein the steam system comprises a steam vessel that feeds a stream of liquid water under pressure to the reactor system to cool the reactor system, thereby generating a steam stream, and receives the steam stream from the reactor system, the method comprising the steps of (i) obtaining a first total liquid level measurement in the steam vessel using an inferred level device, (ii) obtaining a second total liquid level measurement in the steam vessel using a direct level measurement device, (iii) calculating a difference between the first and second total liquid level measurements using a control system, and (iv) initiating an alarm using the control system when the difference between the first and second total liquid level measurements is ≥1% of the lower of the first and second total liquid level measurements.

The invention discloses a UHT sterilization system driven by a heat pump steam system and a sterilization method of the UHT sterilization system, and relates to the technical field of UHT sterilization systems. The UHT sterilization system overcomes the technical defect that the utilization rate of heat energy of an existing UHT sterilization system is low. The UHT sterilization system comprises a boiler heating subsystem and a heat pump heating subsystem. The heat pump heating subsystem comprises a second preheating heat exchanger and a heat pump unit; a first electric three-way valve is arranged on the material pipe between the material bin and the first preheating heat exchanger, a fourth electric three-way valve is arranged between the first preheating heat exchanger and the ultra-high-temperature sterilizer, and a medium-temperature outlet of the second preheating heat exchanger is connected with the ultra-high-temperature sterilizer through the fourth electric three-way valve; a backwater outlet of the ultrahigh-temperature sterilizer is connected with a backwater inlet of the heat pump unit through a sixth electric three-way valve; a steam outlet of the heat pump unit is connected with a steam inlet of the ultrahigh-temperature sterilizer; waste heat in the material sterilization and cooling process is recycled through the heat pump, the utilization rate of heat energy in the system is increased, and engineering investment is saved.

A gas turbine engine includes a steam generating system, and a combustion section having a first combustor and a second combustor in fluid communication with a secondary combustion zone of the first combustor. The second combustor is operable to receive compressor bleed air and fuel, along with steam from the steam generating system. During a non-idle operating state and a power-augmentation operating state, when the steam system is operable, steam is provided to the second combustor and then to the secondary combustion zone of the first combustor. When the steam generating system is inoperable, the fuel and bleed air are provided to the second combustor and combusted, and combustion products are provided to the first combustor. When the steam generating system is partially operable, the steam, the bleed air, and the fuel are provided to the second combustor, and combustion products are provided to the first combustor.

The invention relates to the technical field of energy utilization, in particular to a thermal power plant fused salt heat storage peak regulation control system and method for storing steam sensible heat. The system comprises an intelligent control module, a gas monitoring module, an emergency processing module, a fused salt storage module and a heat exchange module, the output end of the intelligent control module is connected with the input ends of the gas monitoring module, the emergency processing module, the fused salt storage module and the heat exchange module. The output end of the gas monitoring module is connected with the input end of the fused salt storage module and the input end of the heat exchange module. The output end of the emergency processing module is connected with the input end of the fused salt storage module and the input end of the heat exchange module. The fused salt storage module is connected with the heat exchange module; the heat exchange module is connected with a thermal power plant steam system. The technical problem that hidden dangers are caused due to the fact that an existing thermal power plant is insufficient in harmful gas monitoring means and early warning mechanism can be solved.

The present invention relates to a marine thermal system with a multi-hydrophobic structure, including an auxiliary steam turbine generator set, an auxiliary condenser, and a bypass system. The auxiliary steam turbine generator set has an air ejector drain interface, a main steam drain interface, a main steam valve drain interface, a front cylinder drain interface, and a steam seal supplementary steam drain interface. A multi-stage desuperheating and pressure reducing device is arranged in the bypass system. The first and second stage desuperheating and pressure reducing devices are both composed of the form of "pressure reducing valve + desuperheater". The pressure reduction ratios of the desuperheating and pressure reducing devices at all levels match the drain pressure, that is, the steam pressure after desuperheating and pressure reducing at all levels is less than the drain pressure in the pipeline section into which it is discharged. The present invention optimizes the complex system in which steam drains of different pressure levels of the marine steam turbine generator set need to be led to various pressure vessels, effectively reducing the space occupied by the equipment. At the same time, introducing high-temperature drains into the condenser is beneficial to the thermal deaeration of condensate, improving the economy of the entire circulation system; and can quickly and stably control the steam network pressure, which is beneficial to the safety of the steam system.

The application discloses an air conditioner refrigeration and heat supply system based on a siphon principle and a running method thereof. The system comprises a refrigerant water system, a refrigerant steam system and a liquid level adjusting device for adjusting a refrigeration temperature. The refrigerant water system comprises a high-position water tank, a siphon starting pump, an evaporation container, a low-position water tank and a heat absorbing device for providing heat required by refrigerant evaporation. The running method comprises three processes of refrigerant water siphon decompression, heat absorbing evaporation and steam compression discharge. The application completely gets rid of the bondage of traditional "four refrigeration components", provides a simpler and more feasible structure form, and can be used as a cold water unit, a water source or air source heat pump and a cold and heat combined supply unit. The application has the characteristics of simple structure, low construction cost and one machine with multiple uses. Since water is used as the refrigerant, the application has the advantages of environmental friendliness, energy saving and emission reduction. Compared with a traditional steam compression cycle refrigeration method, the application has a wider refrigeration temperature range, a higher heat supply grade and a larger theoretical refrigeration coefficient.

The utility model discloses conveying belt type pressure pulsation steam blanching equipment which comprises a blanching box body, a steam system, a vacuum system, a material conveying system and a sealing system, the blanching box body is used for loading materials when the materials are subjected to steam blanching; the steam system is used for generating and conveying steam when the materials are subjected to steam blanching; the vacuum system is used for vacuumizing the blanching box body before steam blanching; the material conveying system is used for conveying materials to the blanching box body during steam pulse blanching; the sealing system is used for keeping the vacuum environment in the blanching box body after steam pulsation blanching vacuumizing. According to the utility model, the blanching speed of fruits and vegetables is effectively improved, and a good sterile vacuum material blanching environment is realized.

The invention provides a high-temperature steam system and method based on waste heat recovery and vinasse recycling, belongs to the technical field of steam systems, and can solve the problems that when an existing steam system is applied to the brewing industry, a large amount of primary energy needs to be consumed, and brewing by-products are not sufficiently utilized. According to the technical scheme, the waste heat recovery assembly comprises a heat exchanger, a high-temperature heat pump unit, a heat storage tank, a high-temperature steam heat pump unit and a condensate water tank; the vinasse recycling assembly comprises a biogas steam boiler, a double-membrane gas holder and an anaerobic bioreactor. According to the system, industrial by-products of a brewing factory can be comprehensively recycled, high-temperature steam required by a boiling process of the brewing factory is provided while secondary steam generated by a boiling pot, low-grade waste heat of the factory and brewing waste are recycled, and the energy utilization efficiency of the system is improved; a novel high-efficiency, low-carbon and energy-saving high-temperature steam system is provided for a brewing factory.

The utility model belongs to the technical field of steam ovens, and particularly relates to a self-cleaning oven which comprises an oven body, a steam system, a lighting system, a heating pipe system and a control system. The steam system comprises a boiler device which is installed on the rear side of the inner container and used for converting water into steam and providing the steam into the inner container to heat food; the boiler device comprises an air inlet pipe leading to the interior of the inner container, an air inlet pipe installation hole is formed in the inner container, the air inlet pipe is arranged in the air inlet pipe installation hole in a penetrating mode, a connecting piece is arranged at the end of the air inlet pipe, and an air inlet pipe sealing piece is arranged between the connecting piece and the side wall of the inner container and made of high-temperature-resistant materials. The connecting piece and the inner container are connected through the air inlet pipe fixing piece, so that the connecting piece enables the air inlet pipe sealing piece to abut against the inner container located on the edge of the air inlet pipe installation hole, the gap between the air inlet pipe and the inner container is sealed, air leakage of the inner container is avoided, the stability of the inner container during working is guaranteed, and normal operation of the steaming oven is guaranteed.