910 results about "Inlet flow" patented technology

Embodiments of a manifold of a hydraulic fracturing system include a junction having an inlet flow bore. The junction can include an integrated flow junction and valve check assembly having a body including a central portion and one or more side portions. The central portion can be positioned between a pair of manifold sections of the manifold and attached thereto. The one or more side portions extend radially from the central portion and include an inlet bore through which a pressurized fluid is received and supplied to the manifold. One or more check valves is positioned along the inlet bore so as to be integrated within the body of the junction.

The invention discloses a movable frame device for a high-power turboprop engine test bed and the engine test bed. The movable frame device comprises a movable frame framework, a front mounting seat and a counterweight system. The movable frame framework is arranged below the static frame device and used for being connected with the static frame device through a plurality of spring pieces arranged on the periphery of the movable frame framework, and then the rack system used for measuring the thrust of the turboprop engine is formed. The front mounting seat is used for being connected with an engine mounting rack for mounting a turboprop engine in a fast mounting manner so as to mount and support the turboprop engine to be measured. And the counterweight system is used for balancing the total weight of the turboprop engine and the engine mounting frame, so that the gravity center of the rack system is positioned in the center defined by the plurality of spring pieces. According to the movable frame device, the air inlet flow field of the propeller is not influenced by the size of the frame of the movable frame device, so that the engine performance is not influenced, the test result is high in accuracy, the test is safe and reliable, and the installation position of the propeller does not interfere with the structure of the movable frame device.

A method for controlling a flow regulating valve (6) of a filling machine (1), controlling the flow of pourable food product, envisages: receiving an inlet pressure measurement (PIN) from a pressure sensor (14); receiving an inlet flow measurement (FIN) from a flow meter (16); determining a control signal (Sc) for controlling an operating position of the flow regulating valve (6) by combined contributions (C1, C2) of a flow feedback control module (22), receiving at its input a flow set point (FSP) and the inlet flow measurement (FIN) and generating a first control contribution (C1) indicative of a difference between the inlet flow measurement and the flow set point; and a flow feed-forward control module (20), receiving at its input the inlet pressure measurement (PIN) and the flow set point (FSP) and generating a second control contribution (C2) as a function of the flow set point and inlet pressure measurement, using pre-stored fluid-dynamic maps, which may be a result of a characterization of the flow regulating valve in a test condition. The flow feed-forward control module uses the fluid dynamics maps in a dynamically adaptive manner, depending on different operating conditions of the filling machine and / or the related pourable food product, thereby adapting to the same different operating conditions and / or the pourable food product.

The invention discloses a combustion chamber nonlinear stability prediction method based on multi-input thermo-acoustic disturbance modeling. The method is used for evaluating thermo-acoustic stability of combustion chambers of aero-engines, gas turbines and the like. According to the method, geometric, operation and analysis parameters are input, and cooling flow distribution is calculated; solving an effective equivalence ratio, a heat release rate and a temperature field, and calculating an acoustic modal frequency; constructing an equivalence ratio and inlet flow double-disturbance MISO transfer function, and generating an FTF curve; and judging oscillation through a limit cycle detection algorithm, calling a Tanh / PowerLaw model to calculate a saturated heat release rate, and finally visually outputting a result. Multi-factor coupling accurate modeling is achieved, intervention can be conducted in the initial stage of design, calculation only needs several minutes, the prediction precision and efficiency are improved, the research and development cost is reduced, and the safety of the combustion chamber is guaranteed.

The invention discloses a gas purification real-time monitoring method, system and device and a medium, and belongs to the technical field of gas purification. The method comprises the following steps: a data acquisition stage: acquiring inlet gas flow and outlet component data; in the adsorbent state monitoring stage, the adsorbent state is monitored in real time through the monitoring point position in the adsorption barrel; in the adsorption capacity calculation stage, the residual adsorption capacity is predicted through an impurity penetration curve model on the basis of inlet flow and outlet component data, and bidirectional verification and correction are carried out on the residual adsorption capacity and an internal monitoring state; in the regeneration time prediction stage, the optimal regeneration time is dynamically predicted according to discharged gas component analysis and residual adsorption capacity; in the real-time regulation and control stage, parameters of the purifier and the regenerative heater are adjusted in real time according to the prediction result. Accurate evaluation of the state of the adsorption cylinder and intelligent optimization of the regeneration process are achieved, the utilization rate of the adsorption cylinder is remarkably increased, and the total energy consumption of regeneration is reduced.

The invention discloses digital intelligence powder type distribution-free variable viscosity fracturing fluid skid-mounted equipment and a control method thereof, and belongs to the technical field of oil and gas field development. The equipment comprises a stirring mechanism, a feeding mechanism, a water feeding mechanism and a discharging mechanism which are centrally controlled through a control box. The feeding mechanism adopts a first screw conveyor to convey solid materials to the stirring tank body; the water supply mechanism supplies water to the tank through a water supply pump and a water outlet pipe with an electromagnetic valve, and the water quantity is monitored by a water inlet flow sensor; the discharging mechanism outputs the mixed liquid through a discharging pump, and the viscosity of the fracturing fluid is detected in real time through a viscosity sensor. The control box is connected with all the sensors and execution components, and automatic adjustment and closed-loop control of the material proportion are achieved by collecting flow and viscosity data. According to the invention, accurate and automatic preparation of the fracturing fluid is realized, the problems of inaccurate traditional manual proportioning and poor stability are effectively solved, and the fluid preparation quality and the operation efficiency are remarkably improved.

An embodiment of a manifold of a hydraulic fracturing system includes a flow cross junction including an inlet flow bore. In addition, the manifold includes a coupling adapter including an external shoulder and a connection device. The connection device is to connect to an output of a pump of the hydraulic fracturing system, and the coupling adapter is removably inserted within the inlet flow bore such that the connection device is positioned outside of the inlet flow bore. Further, the manifold includes a retainer ring connected to the flow cross junction and compressed against the external shoulder.

The invention provides a high-pressure cavitation valve which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve body is internally provided with a mounting cavity and is provided with a flow inlet channel and a flow outlet channel; the valve cover is arranged at the upper part of the valve body and used for covering the upper side of the mounting cavity; the valve assembly comprises a valve element, a valve rod, a mounting seat, a valve seat and a throttling module, the mounting seat, the throttling module and the valve seat are sequentially arranged from top to bottom, a movable cavity of the valve element is formed in the mounting seat and the throttling module, the valve element is mounted in the movable cavity and used for acting up and down to be matched with the valve seat to open and close the valve, and the valve rod penetrates through the valve cover and then is connected with the valve element; the throttling module at least comprises two round throttling laminations which are arranged in an up-down overlapped mode, a center hole is formed in the center of each throttling lamination in a penetrating mode, a labyrinth flow channel used for reducing pressure and noise of media is formed between every two adjacent throttling laminations, and the labyrinth flow channels are not communicated with one another at the overlapped portions of the throttling laminations. The throttling module in the scheme can effectively play roles of throttling, pressure reduction and the like.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body and a combustion head, the fire grate body is provided with a mixing cavity and at least two air inlet flow channels, the mixing cavity is provided with a fire opening, the exhaust ends of the at least two air inlet flow channels are communicated with the mixing cavity, and the combustion head is communicated with the mixing cavity. The gas inlet end of each gas inlet flow channel forms an injection opening, each injection opening is used for conveying gas and air to the corresponding gas inlet flow channel, the combustion head is arranged on the fire opening, and the combustion head is provided with a plurality of fire holes communicated with the mixing cavity. According to the technical scheme provided by the invention, the primary air coefficient of the fire grate can be increased, the overall high temperature of the combustion head is prevented, and the flame distribution of the combustion head is more uniform, so that the local high temperature of the combustion head is avoided, the generation of thermal nitrogen oxides can be greatly reduced, and the emission of harmful substances is reduced.

The invention provides an aircraft component fault intelligent diagnosis and maintenance control system, and relates to the technical field of aircraft component diagnosis. A stall modeling module of the system establishes an aeroelastic coupling equation for quantifying stall behaviors on the basis of collected pressure disturbance data of an air inlet flow field of an air compressor and blade row vibration response information. The elastic response deduction module discretizes the equation through a state conversion operator and then embeds the equation into a graph neural network node update function. The graph embedding coupling recognition module recognizes blade tip gap mutation behaviors induced by local stall and time sequence precursor characteristics of the blade tip gap mutation behaviors by using a node state evolution trajectory output by the graph neural network, and constructs a surge precursor evolution path. And the early warning output module carries out instability trend judgment on the surge precursor evolution path, and outputs a maintenance suggestion and an early warning identifier aiming at a blade fracture fault, so that the structure failure risk caused by the surge of the gas compressor is effectively predicted, and the accuracy and timeliness of fault diagnosis of aircraft parts are remarkably improved.

The invention relates to the technical field of compressors, in particular to a series-connection automobile towing compressor system and an automatic surge control method. The series-connection automobile towing compressor system comprises a plurality of stages of automobile towing compressors, a plurality of temperature reduction devices, a bypass return valve, a plurality of temperature reduction adjusting valves and a plurality of orifice plate flowmeters. The problems that in the prior art, cost is high, energy consumption is large and the control effect is not ideal are effectively solved, the multiple stages of automobile dragging compressors are arranged in series and matched with the temperature reducing device and the bypass backflow valve, effective circulation and temperature control of media are achieved, cost of independently using a surge backflow valve in the prior art is reduced, and meanwhile the control effect is good. Through the arrangement of the vortex shedding flowmeter, the pressure sensor, the temperature sensor and the rotating speed sensor, the inlet flow, pressure, temperature and rotating speed of each stage of compressor are accurately measured, in combination with theoretical surge pressure ratio calculation, the surge risk is pre-judged in advance and automatically controlled, and energy consumption increase caused by premature intervention of a bypass return valve at the low rotating speed is avoided.

The invention relates to the technical field of magnetic pumps, and discloses a reverse driving impurity type magnetic pump which comprises a pump chamber, a water inlet, a water outlet and an impurity removal channel are formed outside the pump chamber, an impeller is arranged in the pump chamber, and the impeller is connected with an inner magnetic rotor shaft and is connected with an outer magnetic rotor shaft through a motor to drive rotation. Liquid in the water inlet axially flows into the pump chamber, a suction chamber is arranged in the water inlet and is a conical barrel with the cross section area gradually and uniformly shrunk, an inducer is arranged on the side, facing the water inlet, of the impeller, the inducer and the impeller coaxially rotate, the installation angle of blades of the inducer is small, and flow channels between the blades are long and wide. And the number of the blades is 2-4.

The embodiment of the application provides a gravity self-balancing uniform water distribution system, which comprises first, second and third stage gravity self-balancing water distribution pipelines. Each second stage gravity self-balancing water distribution pipeline is connected to the first stage gravity self-balancing water distribution pipeline, and each third stage gravity self-balancing water distribution pipeline is connected to the second stage gravity self-balancing water distribution pipeline. The circulating water of the cooling tower is automatically depressurized after entering the first stage gravity self-balancing water distribution pipeline, and flows into each second stage gravity self-balancing water distribution pipeline on the basis of the self-weight of the water to realize double uniform water distribution. The water level height of each second stage gravity self-balancing water distribution pipeline is consistent, and the water inlet flows to the third stage gravity self-balancing water distribution pipeline again. The pressure at each water nozzle directly or indirectly connected to the third stage gravity self-balancing water distribution pipeline is consistent, and the water outlet of each water nozzle and the spraying area are substantially the same, so that uniform water distribution is realized, the water inlet is not affected by the water pressure, and the cooling efficiency of the cooling tower is significantly improved.

The invention provides a compressor multi-cavity axial air inlet casting machine shell structure and a manufacturing method, and belongs to the technical field of compressor axial air inlet machine shells. The compressor multi-cavity axial air inlet casting machine shell structure comprises the steps that an oil gas channel set is arranged in a first blade, the oil gas channel set is made to communicate with a bearing cavity, and the bearing cavity is sealed through a sealing assembly; oil and gas in the bearing cavity are prevented from leaking into the flow channel, interference of oil and gas leakage on axial gas inlet is avoided, the flowing efficiency of axial gas inlet airflow is guaranteed, meanwhile, the oil and gas channel set is formed in the first blade so that the oil and gas channel set can be directly communicated with the bearing cavity, an external pipeline is not needed, the overall structure of the shell is simplified, and the cost is reduced. The manufacturing is convenient; the first machine shell blade assembly is of an integrated structure, the second machine shell blade assembly is of an integrated structure, and on the basis that the first blades and the second blades are added, the number of welded junctions in the machine shell is reduced, so that the tendency of deformation in the machine shell assembling process is reduced, and the axial air inlet flow efficiency is prevented from being reduced.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body, the fire grate body is provided with a mixing cavity, a first air inlet flow channel and a second air inlet flow channel, the mixing cavity is provided with an air outlet, and the air inlet end of the first air inlet flow channel is provided with an injection opening used for introducing air and fuel gas; the exhaust end of the first air inlet flow channel is communicated with a mixing cavity, the air inlet end of the second air inlet flow channel is provided with an air inlet used for introducing air, the exhaust end of the second air inlet flow channel is communicated with the first air inlet flow channel, and the second air inlet flow channel is used for jetting flow to the first air inlet flow channel. A jet flow angle is formed between the jet flow direction of the second gas inlet flow channel and the gas conveying direction of the first gas inlet flow channel, and the jet flow angle is larger than 45 degrees and not larger than 70 degrees. And the combustion head part is arranged at the air outlet, and the combustion head part is provided with a fire hole communicated with the mixing cavity. According to the technical scheme provided by the invention, emission of carbon monoxide and nitrogen oxide can be reduced.

The invention provides a fluid distributor and a heat exchanger, and the fluid distributor comprises a first plate-shaped body which is provided with an inlet flow path; a second plate-shaped body in which first and second outlet flow paths are formed so as to be spaced apart from each other in the height direction; the flow guide frame is fixed between the first plate-shaped body and the second plate-shaped body in a sealed mode, the interior of the flow guide frame is divided into a first flow guide space and a second flow guide space, the flow guide frame comprises a flow equalizing plate which is adjacent to the inlet flow path in the height direction and located below the inlet flow path, and the flow equalizing plate comprises a flow equalizing plate bottom and a flow equalizing plate extending part; the bottom of the flow equalizing plate is located below the inlet flow path correspondingly, and the flow equalizing plate extending parts extend from the bottom of the flow equalizing plate to the positions above the two sides of the bottom of the flow equalizing plate in the mode of inclining to the height direction. And therefore, fluid flowing in from the inlet flow path is shunted to two sides of the bottom of the flow equalizing plate and is respectively guided to the first flow guide space to flow out from the first outlet flow path and the second flow guide space to flow out from the second outlet flow path. According to the invention, the uniformity and fault tolerance of refrigerant distribution are improved.

The invention provides a wide-adjustment high-reliability electric propulsion system and a control method. The wide-adjustment high-reliability electric propulsion system comprises a pressure adjustment module, a flow adjustment module and a Hall thruster. The flow adjusting module is composed of an electromagnetic valve and a flow distributor. According to the Hall thruster flow distributor, through different previous series-parallel connection relations, on the premise that flow distributors are not added, the Hall thrusters can work in pairs, meanwhile, the backup number of the cathode flow distributor and the anode flow distributor is increased, and the system reliability is improved. By arranging the flow resistance step of the flow distributor, the large-range flow adjusting capacity of the cathode and anode inlets of the Hall thruster can be obtained, and therefore the large-range variable thrust working mode, the cathode large-flow ignition mode and the anode low-flow starting mode of the Hall thruster are achieved.

This application provides a fluid distributor and a heat exchanger. The fluid distributor includes: a first plate-shaped member in which an inlet flow passage is formed; a second plate-shaped member in which a first outlet flow passage and a second outlet flow passage spaced apart in a height direction are formed; a flow guide frame sealingly fixed between the first plate-shaped member and the second plate-shaped member, having a first flow guide space and a second flow guide space partitioned inside. The flow guide frame includes a flow equalizing plate, and the flow equalizing plate includes a flow equalizing plate bottom portion, and flow equalizing plate extension portions which extend upward from the flow equalizing plate bottom portion to two sides of the flow equalizing plate bottom portion while being inclined in the height direction. This application improves uniformity and a fault tolerance of a refrigerant distribution.

The application discloses a ventilator humidification tank, which comprises a tank body and an internal chamber. The tank body is provided with an air flow inlet and an air flow outlet, and the internal chamber can contain humidification liquid and is communicated with an external air path. The tank body comprises an insertion end and a holding end. The insertion end can be inserted into the inside of a ventilator main machine. The humidification tank further comprises an air inlet flow guide part with a first end and a second end. The first end is in sealed connection with the air flow inlet, and the second end is communicated with the internal chamber. The air inlet flow guide part comprises a flow guide pipe with a bending extension. The flow guide pipe comprises a first flow channel and a second flow channel. When the humidification tank is rotated by not more than 90 degrees in any direction from a working position, the humidification liquid cannot enter the first flow channel, so as to prevent the humidification liquid from flowing out of the air flow inlet. According to the application, the air path inside the air inlet flow guide part is designed to be bent and extended, so that the reverse flow path of the humidification liquid in the flow guide pipe is more tortuous. Even if the machine body is tilted, the humidification liquid will not flow back, so that the safety of the air blower is ensured.

The application discloses a kind of anti-surge control methods for compressor unit, specifically relates to the field of compressor unit operation control, the application is deployed pressure, flow, temperature and other various sensor terminals in the installation and commissioning phase of compressor unit, real-time acquisition inlet pressure, flow, exhaust pressure and other working parameters, after acquisition, data is preprocessed, smooth data using moving average filtering method, according to 3σ principle washes abnormal value, according to missing proportion processing missing value and normalization, based on preprocessed data, build operating condition model, combined with inlet flow and exhaust pressure and other parameters, calculate anti-surge threshold in low, medium and high load area, at the same time, use historical data to build exhaust pressure and inlet flow prediction model, predict future state. By comparing predicted value and threshold value to judge surge state, and then adjust inlet and outlet adjusting valve opening, ensure the stable operation of compressor unit, effectively prevent surge phenomenon from occurring, improve the safety and reliability of compressor unit operation.

The utility model discloses an air inlet flow nozzle measuring assembly. The air inlet flow nozzle measuring assembly comprises a main body; the fixing mechanism comprises a flange plate fixedly connected to the outer wall of the flange of the main body, a connecting pipe is fixedly connected to the inner wall of the flange plate, fixing cylinders are symmetrically and fixedly connected to an inner cavity of the flange plate, buttons are slidably connected to the inner walls of the circumferences of the fixing cylinders, and springs and push rods are fixedly connected to the outer walls of the buttons; a groove is formed in the circumferential outer wall of the tail end of the push rod; the cleaning mechanism comprises a mounting groove formed in the inner wall of the flange plate, an outer gear ring is rotationally connected to the inner wall of the mounting groove, a meshing groove is formed in the outer wall of the flange plate, and a gear is meshed with the outer wall of the circumference of the outer gear ring; wherein the gear is rotationally connected to the outer wall of the meshing groove, the end, extending out of the meshing groove, of the outer gear ring is meshed with the gear, and the outer wall of the flange plate is fixedly connected with a motor. The device has the advantages that accumulation of impurities is reduced, disassembly of the connecting pipe is avoided, and cleaning can be directly carried out.

The invention relates to the technical field of generators, and discloses an efficient heat dissipation piston generator which comprises a power generation body mechanism, wind collection and flow guide mechanisms are arranged on the two sides of the power generation body mechanism, and an air inlet and flow guide mechanism is arranged on one side of each wind collection and flow guide mechanism. According to the piston generator with the efficient heat dissipation function, through the arrangement of the power generation body mechanism, the air collection flow guide mechanism, the air inlet flow guide mechanism, the water mist spraying cooling mechanism and the seepage water collection mechanism, an active spraying cooling technology can be adopted in the using process, and micron-sized water mist is evenly sprayed to the surface of a power generation unit through the water mist spraying mechanism; and meanwhile, directional airflow is formed in combination with an air inlet flow guide structure to accelerate evaporation of liquid drops, so that heat is efficiently taken away, and compared with a traditional passive heat dissipation mode, the scheme remarkably improves the heat dissipation efficiency and reduces dependence on the environment wind speed.

The invention relates to the technical field of flue gas treatment, in particular to a device for removing sulfur dioxide in flue gas. Comprising a tower body, the lower end of the tower body fixedly communicates with an air inlet pipe, the air inlet pipe is provided with a flow sensor, the upper end of the tower body fixedly communicates with an air outlet pipe, second side plates are fixed to the front side and the rear side in the tower body, and two first side plates are arranged between the two second side plates and connected with the tower body through electric telescopic rods; a spraying assembly is arranged at the central position in the upper end of the treatment cavity, and the spraying assembly is communicated with the liquid inlet flow control assembly. According to the invention, the two first side plates synchronously move towards each other or away from each other, so that the circulation cross-sectional area of the treatment cavity is changed in real time. When the flue gas flow is reduced, the cross section is reduced, the flue gas and the atomized treating fluid are forced to fill the cavity, and the effective contact area of the atomized treating fluid and the flue gas is ensured; when the flow is increased, the cross section is enlarged, the gas flow rate is reduced, and the reaction time of flue gas and atomized treating fluid is prolonged.

The subject matter of this specification can be embodied in, among other things, a subsea energy recovery system for generating electric power that includes an inlet flow line configured to couple to a subsea tree of a subsea gas well to receive gas produced from the subsea gas well, and a subsea electric power generation system, the subsea electric power generation system configured to reside subsea on a subsea production site of the subsea gas well and including a turbine wheel configured to rotate in response to expansion of the gas, a rotor configured to rotate with the turbine wheel, a stationary electric stator, the rotor and electric stator defining an electric generator configured to generate current, and a hermetically sealed housing enclosing the turbine wheel, the rotor, and the electric stator and hermetically sealed inline in the first flow line.

The invention provides a carbon dioxide trapping device, which relates to the field of carbon dioxide adsorption, and comprises a main gas pipe, a distributor, an absorption tower group consisting of a plurality of sub-towers with the same structure, a flow control valve group, a sensor group, a regeneration tower, a rich and lean liquid heat exchanger and a controller, the controller dynamically adjusts the opening degree of the air inlet adjusting valve and the opening degree of the proportion adjusting valve of each sub-tower based on the distributor pressure, the air inlet flow of each sub-tower, the pressure intensity in the tower and the outlet carbon dioxide concentration collected by the sensor, and dynamically adjusts the number and flow distribution of the operating sub-towers according to an upstream load change signal in combination with the constraint of a high-efficiency area of a gas phase flow window of the sub-tower. The controller is further integrated with a prediction model based on a long-short-term memory neural network, a rolling time domain optimization algorithm is adopted, regeneration energy consumption is minimized under the condition that safe production is guaranteed, and efficient, stable and energy-saving operation of the decarburization process is achieved through cooperative control of the efficient set, the buffer set and the standby set.

The invention belongs to the field of test fluid mechanics, and discloses a flow correction method considering air inlet distortion and a calibration device. The flow calibration device comprises a standard flow spray pipe, an air inlet section, a measurement section, a rectification section and an exhaust spray pipe which are sequentially connected from front to back. The flow correction method considering the air inlet distortion comprises the steps that distortion air inlet flow correction is conducted; flow and distortion intensity evaluation is carried out; training a neural network; carrying out an air inlet channel test; calculating an air inlet flow distortion parameter; and correcting a flow calculation result. According to the flow correction method and the calibration device considering the air inlet distortion, the air inlet distortion, the total pressure loss and the Reynolds number influence are comprehensively considered, technical support can be provided for high-precision flow monitoring of a large-curvature aircraft air inlet performance evaluation test, and the method and the calibration device have high engineering practical value.

The utility model belongs to the technical field of heaters, and discloses a liquid heater water channel structure and a liquid heater, the liquid heater water channel structure comprises a shell, a plurality of vortex generators and a ski-jump plate, two throttling channels are respectively arranged at the water inlet end and the water outlet end of a main flow channel; the water inlet flow channel and the water outlet flow channel are communicated with the main flow channel through the corresponding throttling channels, the vortex generators are distributed in the main flow channel in a matrix mode, the ski-jump plate is arranged on the side, close to the throttling channels, of the water outlet end of the main flow channel, and liquid in the main flow channel forms strong turbulent flow under the action of the vortex generators. The continuous vortex structure enhances mixing of liquid in the main flow channel, reduces total heat resistance of heat exchange and improves heating efficiency of the heater, the heated liquid in the main flow channel flows through the ski-jump plate, bubbles of cooling liquid are not prone to being gathered at the water outlet end of the main flow channel, the exhaust effect is more obvious, the bubbles cannot be accumulated even if the liquid heater inclines, and the service life of the liquid heater is prolonged. And the problem of ablation of the heating film of the liquid heater is prevented.

The embodiment of the utility model discloses a valve element, a valve device and a water outlet system, and relates to but is not limited to kitchen and bath technologies. The valve element comprises a shell mechanism provided with a first water inlet flow channel, a second water inlet flow channel, a first water outlet flow channel and a second water outlet flow channel, and a rotating mechanism comprising a rotating assembly and a pressure balancing assembly. The rotating assembly is provided with an installation space, and the pressure balancing assembly is installed in the installation space. The rotating assembly is provided with a first port and a second port which are communicated with the installation space. One of the first water inlet flow channel and the second water inlet flow channel is arranged to introduce hot water into the valve element, and the other one is arranged to introduce cold water into the valve element. In the process that the rotating assembly rotates relative to the shell mechanism, the rotating assembly can be communicated with or disconnected from the first water inlet flow channel and the second water inlet flow channel at the same time, a one-way valve does not need to be additionally arranged to prevent cold and hot water from flowing, and the first port and the first water outlet flow channel can be communicated or separated, and the second port and the second water outlet flow channel can be communicated or separated. And the water temperature can be adjusted.

A manifold (364) includes selectable different internal flowpaths between one or more inlets (660, 670) and one or more outlets (655, 665, 676) of the manifold (364), each internal flowpath corresponding to a particular selected operating mode of a system, such as a water provisioning system. Flow sensors (680, 681, 682) are mounted on the manifold within the inlet(s) and the outlet(s), to provide flow signals indicative of a flow rate of a liquid passing through the respective inlet and outlet when the manifold (364) is operating in a particular selected operating mode of the system. The inlet flow and outlet flow signals are usable by a controller to learn a flow rate of the liquid passing through an outlet when a liquid of a particular flow rate passes through the inlet when the manifold is operating in the particular selected operating mode of the system so as to control a component of the system operating in the particular selected operating mode.

The invention discloses a valve assembly and a spaceflight propulsion system with the valve assembly, the valve assembly comprises a valve body, a valve core assembly and a reset piece, a mounting cavity, an inlet flow channel and an outlet flow channel are formed in the valve body, the inlet flow channel and the outlet flow channel are respectively communicated with the mounting cavity, and an inlet and an outlet which are respectively communicated with the inlet flow channel and the outlet flow channel are formed in the valve body; the valve element assembly is movably arranged in the mounting cavity, and the valve element assembly moves under the action of liquid pressure of the inlet flow channel so as to selectively connect or disconnect the inlet flow channel and the outlet flow channel; the reset piece is arranged between the valve element assembly and the inner wall of the mounting cavity so as to drive the valve element assembly to reset. Wherein a balance cavity is further defined between the valve element assembly and the mounting cavity, and a throttling channel for communicating the inlet flow channel with the balance cavity is formed in the valve element assembly. According to the valve assembly, the throttling channel is arranged, so that the buffering effect on liquid impact is achieved, and the valve assembly shows excellent reliability and durability under the high-pressure and high-frequency working conditions of an aerospace propulsion system and the like.