347 results about "Controlled drainage" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The utility model provides a mechanical drainage shower device which comprises a water mixing device which comprises a water inlet end and a water outlet end, the water inlet end is connected with a cold water pipeline and a hot water pipeline, the water outlet end is connected with a main pipeline, and the main pipeline comprises a drainage branch and a plurality of water outlet branches. The pre-drainage device comprises a drainage valve, a water outlet valve, a drainage port, a drainage channel and a water outlet channel, the drainage channel and the water outlet channel are communicated with the drainage branch and the drainage port respectively, the drainage valve is used for controlling opening and closing of the drainage channel, and the water outlet valve is used for controlling opening and closing of the water outlet channel; the shell, the water mixing device and the pre-drainage device are both arranged in the shell, the shell is provided with a water outlet button used for controlling the water outlet valve, a pre-drainage switch and a plurality of shower switches, the pre-drainage switch and the shower switches are respectively used for controlling the water outlet branch and the water outlet branches to be opened and closed, and the water outlet branches and the water outlet are respectively connected to corresponding showers. Therefore, cold water pre-drainage of the shower device can be achieved through the mechanical switch, and the adaptability of the shower device to old users is improved.

The invention relates to the technical field of heat exchange equipment, in particular to an intelligent self-adaptive multi-working-condition efficient heat exchange finned tube type direct water-cooling evaporative heat exchanger which comprises a shell, a finned tube is installed in the shell, a flow meter is installed at the liquid inlet end of the finned tube, and the flow meter is electrically connected with a controller. The liquid inlet end of the shell communicates with a water delivery pump, a spraying assembly and a cleaning assembly through a four-way pipe, the liquid outlet end of the shell communicates with a drainage pump, the liquid outlet end of the drainage pump communicates with the liquid inlet end of the water delivery pump, and the controller is used for controlling the drainage pump, the water delivery pump, the spraying assembly and the cleaning assembly to work. The controller is used for controlling the drainage pump, the water delivery pump, the spraying assembly and the cleaning assembly, the drainage pump, the water delivery pump, the spraying assembly and the cleaning assembly can work separately in an intelligent and self-adaptive mode under different working conditions, the heat exchange efficiency can be effectively and dynamically adjusted in real time when loads are changed or the environment temperature fluctuates, and the heat exchange efficiency is improved. The energy consumption is reduced.

The utility model provides a reservoir, and mainly relates to the field of reservoir devices. A reservoir includes a reservoir wall. The utility model has the beneficial effects that the stirring blades are arranged in the reservoir wall to promote water circulation, the funnel groove and the threaded strip are combined to accelerate the discharge of harmful substances, the water valve accurately controls the drainage, the rapid water purification circulation is realized, the water quality in the reservoir is effectively improved, and the water quality is improved. The transfer water tank is arranged to collect a water source which is discharged in the early stage and possibly contains harmful substances, rapid recycling is achieved, waste is avoided, meanwhile, rapid recycling is supported for other cleaning operations, through the supporting design of the water pump and the output pipe, water can be directly conveyed to a high position such as water adding for a watering cart, manual operation is reduced, and efficiency and safety are improved; the support structure is firm, the labor intensity is reduced, the deposition is effectively prevented through the stirring blades driven by the intelligent motor, the maintenance is simple, and the device is suitable for scenes needing frequent circulation or treatment of substances easy to precipitate.

The invention discloses a control roof drainage method for multiple coal faces in a monocline structure area, which combines the characteristic that the water level of a monocline structure is gradually increased along with the burial depth, and adopts a layered and graded control drainage strategy by utilizing the burial depth difference of the working faces, and comprises the following steps of: firstly, controlling the drainage water level at a preset water head threshold value; ensuring that the water level is lower than the elevation of the bottom plate of the first mined shallow working surface, and meeting the safe mining condition of the shallow working surface; and after mining of the shallow working face is completed, the drainage amount of the drill hole is gradually increased, the drainage level is reduced, the mining requirement of the next deep working face is met, and sequential mining of multiple working faces from shallow to deep is achieved in the same manner. According to the method, the drainage drill holes are formed in the low-position roadway at a time, roof water disaster prevention and control of all the working faces are achieved in order in a controlled drainage mode, the dynamic water inflow of the working faces can be reduced, and remarkable economic, safe and environmental benefits are achieved.

The invention discloses a ground trough type planting and cultivation management system applied to a greenhouse, and belongs to the technical field of crop planting, and the system specifically comprises a parameter collection module which is used for monitoring the fertilizer absorption behavior of a root system in a planting trough in real time, the planting trough is laid with a composite film, and the metabolic activity parameters of the root system are obtained through a non-invasive sensing technology; the demand division module is used for dividing a seedling stage, a vegetative growth stage and a reproductive growth stage according to crop growth stages, and establishing a differentiated demand model of water and fertilizer absorption of root systems in each stage; the instruction generation module is used for constructing a drainage frequency self-adaptive adjustment strategy, performing multi-dimensional correlation analysis on the root metabolism activity parameters, the matrix osmotic pressure and the environment evaporation rate, and generating a drainage time sequence control instruction matched with the growth stage; the drainage control module is used for placing a perforated drainage blind pipe at the bottom of a planting groove according to the drainage time sequence control instruction and controlling the cooperative action of a drainage valve group through regional gradient; scientific drainage management is achieved.

A bathing system for providing a water jet bath to a bather. The bathing system includes a tub, a seating element configured to receive a seated bather and a piping system comprising at least one pipe and a plurality of water jet elements associated with the at least one pipe. The seating element comprises a seat bottom and seat back. The piping system is configured to extend at least partially around an internal periphery of the tub. The bathing system also includes a valve element operatively connected to the piping system and a coupling element configured for attachment to a water source. The coupling element is operatively connected to the valve element. A drain element is included and configured to control drainage of water from the tub.

The invention discloses a drainage control ecological regulation and control method for reducing saline-alkali obstacles through cooperation of irrigation and drainage, and relates to the technical field of soil remediation, and the method comprises the following steps: in an infiltration and dissolution stage, under the condition that a drainage outlet is closed, small-flow irrigation is performed at the farthest end from a drainage ditch pipe, so that a large amount of irrigation water enters small pores of a soil profile, and salt is infiltrated and dissolved; in the diffusion and dispersion stage, a drainage outlet is raised, and under the condition that the drainage outlet is lower than the field surface, uniform water distribution and large-flow irrigation are performed, so that large and small pores of a soil profile are filled with irrigation water, and the diffusion and dispersion process of salt is enhanced; in the convection desalination stage, a drainage outlet is opened, and salt-containing water is evenly discharged out of the soil under the condition that the drainage outlet is flush with the drainage ditch pipe in depth; in the water-saving and emission-reducing stage, the depth of a drainage outlet is lower than that of a crop root zone, small-pore communication is broken on the basis, and soil salt is prevented from moving upwards in the crop growth period. Irrigation and drainage are coordinated, and the three goals of salt control, water saving and emission reduction are achieved.

The embodiment of the invention provides a drainage recovery control method and system for a multi-source heat supply network. The method comprises the steps that data acquisition equipment is installed on all drainage pipelines before entering a drainage tank of the heat supply network; acquiring temperature parameters, flow parameters and conductivity parameters of each path of hydrophobic water in real time through the data acquisition equipment; and based on the temperature parameter, the flow parameter and the conductivity parameter, comprehensive state judgment of hydrophobic recovery treatment is carried out, and based on a judgment result, dynamic pollution discharge control is carried out. According to the embodiment of the invention, the blow-down valve is opened in a targeted manner through real-time acquisition and layered judgment, so that the mixed hydrophobic parameters are stabilized in a threshold range, and the problem that traditional static control cannot adapt to multi-source parameter differences is solved; and on the basis that pollution discharge is triggered only when parameters exceed the standard, qualified drained water is prevented from being discharged by mistake, and recoverable water resources and waste heat resources are reserved to the maximum extent.

The invention relates to the technical field of agricultural water conservancy control, in particular to a high-standard farmland intelligent irrigation and drainage pump gate cooperative remote control method and system, and the method comprises the steps: generating a cooperative control instruction which restrains the power of a water pump and the opening and closing of a gate at the same time based on farmland water level information; establishing a conflict relationship between the response delay time of the water pump and the action delay time of the gate, and disassembling the cooperative control instruction into control sub-instructions for the water pump and the gate; when the soil under-saturation signal is continuously detected, the distribution adjustment control sub-instruction adjusts the output power of a water pump and controls the opening degree of an irrigation gate; when the water level overrun signal is continuously detected, the control sub-instruction is adjusted to control the opening degree of the drainage gate, and the output power of the water pump is reversely adjusted based on a backwater shock wave model triggered by the gate opening degree; the farmland water level information is detected in real time, and a cooperative control instruction is reconstructed. According to the invention, the problem of water level oscillation caused by misalignment of cooperative control of the water pump and the gate due to response time delay difference is effectively solved.

The invention relates to the field of new energy, in particular to a rainwater power generation and building energy storage peak regulation system which comprises a water storage roof, a water drainage device, a rainwater opening, a rainwater hopper, a rainwater pipe, a power generation device, a water drainage facility, a water storage facility, a water pumping facility, a circuit pipeline and an automatic control device. The water enters the power generation device after being filtered and controlled by the water drainage device, and power is generated by utilizing potential energy of the water. The controlled drainage comprises the steps that during the peak period of power utilization of the power grid, the roof water level is higher than a set value, the water storage roof needs to drain roof water, and the drainage device drains the roof water when the water storage facility needs the roof water. The water pumping includes that when the water level of the water storage facility is higher than a set value and the water level of the roof water is lower than a set value in the power consumption valley period of the power grid, the water pumping facility pumps water into the water storage roof from the water storage facility. The water storage roof has the advantages that heat insulation and cooling are beneficial to building energy conservation; the power generation device can store energy for peak regulation by using roof water for power generation, and energy is saved.

The invention relates to a drainage system for saline-alkali soil and an installation method, the drainage system for saline-alkali soil comprises an inspection well which is vertically arranged and is at least partially buried underground, the inspection well is internally provided with a containing cavity with a top opening, and the side wall of the inspection well is provided with a through hole; the concealed pipe is transversely arranged underground, the first end of the concealed pipe is arranged in the through hole in a penetrating mode, the first end of the concealed pipe is provided with a water outlet communicated with the containing cavity, the second end of the concealed pipe is closed, and water inlet holes are formed in the surface of the concealed pipe; the drainage mechanism comprises a drainage pump and a drainage pipe used for draining water in the containing cavity, the drainage pump and at least part of the drainage pipe are arranged in the containing cavity, and the drainage pump is communicated with the drainage pipe; the floating body is arranged in the containing cavity, connected with the drainage pump and configured to float upwards to control the drainage pump to work when the liquid level rises to the position of the water outlet. Sewage in the inspection well is prevented from flowing back into the concealed pipe, the whole drainage system does not need to be additionally provided with a water collecting pipe, and the concealed pipe direct drainage mode is adopted, so that the blocking risk of the concealed pipe is reduced.

The invention discloses a composite temperature-control drainage geotextile, and relates to the technical field of geosynthetic materials. The geotextile comprises a drainage layer which is of a three-dimensional water guide structure formed by biaxial warp knitting of special-shaped section wicking fiber bundles and polypropylene reinforced fiber bundles and used for efficient drainage; the reinforcing layer is of a grid structure which is formed by hot melting and bonding ultra-high molecular weight polyethylene fibers and has high tensile strength, and provides mechanical support; the heating layer is composed of carbon fiber heating wires which are arranged in parallel in a snakelike mode and electrically connected in series, and the heating layer is embedded in a quilting seam channel between the drainage layer and the reinforcing layer and can achieve active heating of soil; the temperature control module comprises a temperature sensor in the enhancement layer and a temperature control device connected with the heating layer in series, and the heating power can be dynamically adjusted according to a preset temperature threshold value. By means of the multi-layer composite structure and the intelligent temperature control system, effective integration of drainage, enhancement and active anti-freezing functions is achieved, and the engineering application performance of the geotechnical cloth in the cold environment is remarkably improved.

The invention discloses a drainage pipe network multi-modal data analysis method for urban inland inundation prevention and control, and belongs to the technical field of urban inland inundation prevention and control. According to the method, satellite remote sensing surface ponding images, drainage pipe network liquid levels, regional meteorology, public ponding crowdsourcing information and terrain elevation and pipe network attribute data are collected and integrated into a multi-dimensional original data set; after cleaning and standardization processing, mining waterlogging associated features by using an adaptation algorithm, and establishing a coupling relation model; waterlogging risk reasoning is carried out based on the model, and graded early warning information and pump station scheduling, pipe network dredging and emergency dredging path schemes are generated; and performing visual analysis on a result, and dynamically optimizing a model and a scheme according to real-time updated data. According to the scheme, waterlogging influence factors are comprehensively covered, the accuracy of risk assessment and prevention and control decision is improved, dynamic changes of waterlogging are adapted, and the initiative and systematicness of urban waterlogging prevention and control are enhanced.

The invention belongs to the technical field of fuel cells, and provides a minimum liquid level detection and drainage cycle correction method and system based on a gas-water separator of a fuel cell system. According to the lowest liquid level detection method, an electric heating drainage electromagnetic valve on the gas-water separator is used for heating a valve element part, the liquid level is judged by comparing the temperature difference value before and after heating with a preset threshold value, and cost increase and fault risks caused by the liquid level and a pressure sensor are avoided. The drainage period correction method sets an integral weight according to the relationship between the working current of the electric pile and the anode displacement, accumulatively calculates the displacement and compares the displacement with a preset value to control drainage. The drainage judgment value is adjusted according to the temperature change monitored by the electric heating drainage electromagnetic valve after drainage, and insufficient or excessive drainage is prevented. According to the invention, no additional sensor is needed, the liquid level can be accurately controlled, the hydrogen discharge is reduced, the hydrogen utilization rate is improved, the stable operation of the fuel cell system is ensured, and the problems of liquid level detection and drainage control in the prior art are effectively solved.

The utility model discloses a remote control drainage system of a cleaning and sweeping vehicle, comprising a temperature sensor which is installed on a drainage system pipeline and is used for collecting the temperature of the drainage system; the whole vehicle electronic control unit ECU is used for collecting the driving speed of the cleaning and sweeping vehicle; the upper controller is connected to the temperature sensor and the whole vehicle electronic control unit ECU and used for monitoring temperature data of the drainage system and vehicle speed data of the cleaning and sweeping vehicle to generate an early warning signal; the upper controller is connected to the server through the remote communication module and is used for remotely synchronizing the early warning signal; the server generates a drainage instruction according to the early warning signal and forwards the drainage instruction to the loading controller; the electric high-pressure ball valve set is arranged in the drainage system and used for controlling opening and closing of the drainage system. The electromagnetic valve group is connected to the loading controller and is used for receiving the drainage instruction forwarded by the loading controller; the electromagnetic valve set is connected to the electric high-pressure ball valve set and used for driving the electric high-pressure ball valve set to be opened so as to release water in the drainage system.

The utility model provides a test drainage device for a water diversion system of an impact type unit. The test drainage device comprises a water intake pipe and a drainage pipe, the electromagnetic hydraulic valve is arranged at the other end of the water taking pipe and is connected with the water taking pipe; the pressure reducing valve is arranged in the machine pit and is connected with one end of the water taking pipe at an interval; the gate valve is arranged opposite to the pressure reducing valve and is communicated with the pressure reducing valve through a pipeline; the rear bent pipe is connected to one end of the gate valve; the other end of the water taking pipe extends to the ground, and an obtuse included angle is formed between the water taking pipe and the axis of the pressure reducing valve. The test drainage device for the water diversion system of the impact type unit is simple in structure, low in cost, flexible, good in safety and capable of well controlling the average drainage flow, and the brake water spraying pipeline of the impact type unit is utilized.

The utility model discloses a kind of gas pipeline water stop, it is related to gas pipeline conveying equipment technical field, comprising: water stop body and gas-liquid separation mechanism and free-floating ball type trap, gas-liquid separation mechanism is set in water stop body, to form in water stop body top air passage and bottom drain passage, air passage is communicated with gas outlet pipe, drain pipe is communicated with drain passage;Free-floating ball type trap is installed in the bottom of drain pipe, to form liquid storage cavity in drain pipe, after the water of liquid storage cavity exceeds design height, drive free-floating ball type trap's float ball to rise and then open free-floating ball type trap and discharge water exceeding design height from the drain port of free-floating ball type trap, without manual intervention, can automatically control drainage according to the change of water level in liquid storage cavity, improve the timeliness and efficiency of drainage, ensure that ponding in pipeline system does not too much affect operation.

The application discloses a drainage system, a washing machine and a drainage control method thereof. The drainage pipeline is composed of an inlet pipeline, a first branch pipeline, a second branch pipeline and an outlet pipeline. One end of the inlet pipeline is connected with a washing water outlet, and the other end is bifurcated to be connected with the first branch pipeline and the second branch pipeline. The first branch pipeline and the second branch pipeline are connected with the outlet pipeline at the outlet end. A drainage pump is arranged in the first branch pipeline, and a filter screen is arranged at the inlet of the first branch pipeline. When washing water is drained, the drainage pump is started, the washing water is filtered through the filter screen and then enters the first branch pipeline, and then flows out to the outlet end where the first branch pipeline and the second branch pipeline are connected. The filtered particles are deposited into the second branch pipeline based on gravity, and then are deposited into the outlet end where the second branch pipeline and the first branch pipeline are connected based on gravity. The particles are flushed out of the drainage pipeline together with the water flow drained through the first branch pipeline, so that the damage of the particles to the drainage pump is avoided.

This invention discloses a controlled drainage ecological regulation method for synergistic irrigation and drainage to reduce salinity and alkalinity, belonging to the field of soil remediation technology. The method includes: a soaking and dissolving stage, where, with the drainage outlet closed, low-flow irrigation is performed at the farthest point from the drainage ditch, allowing a large amount of irrigation water to enter the small pores of the soil profile and soak and dissolve salts; a diffusion and dispersion stage, where the drainage outlet is raised, and with the outlet height lower than the field surface, large-flow irrigation is performed evenly, filling all pores of the soil profile with irrigation water and enhancing the diffusion and dispersion of salts; a convection desalination stage, where the drainage outlet is opened, and with the outlet depth level with the drainage ditch depth, saline water is evenly discharged from the soil; and a water-saving and emission-reduction stage, where the drainage outlet depth is lower than the crop root zone, breaking the connectivity of small pores and preventing soil salts from moving upwards during crop growth. This synergistic irrigation and drainage achieves the three major goals of salt control, water conservation, and emission reduction.

The application discloses a kind of negative pressure automatic drainage device, including with the drainage pipe of the blowout preventer's discharge port connection;And the drainage tee pipe is communicated with drainage pipe, drainage tee pipe lower part is provided with control component, control component is used to control the communication state of drainage pipe;Control component is communicated with blowout preventer box by high pressure pipe.The automatic drainage device of the application sets the control component of pressure control in the lower part of drainage tee pipe, the position of solid rubber ball of vibrating screen is controlled by nylon piston by the change of pressure to control the switch of drainage pipe, response timely, realizes automatic control, and ensure that gas cannot be leaked from drainage port.

The utility model discloses an improved line-shaped gate hopper gate water distribution gate. The improved line-shaped gate hopper gate water distribution gate comprises a waterproof frame; the gate is arranged in the waterproof frame in a sliding manner; the water diversion plate is rotationally arranged in the gate, and grooves in a linear array are formed in the side wall of the water diversion plate. According to the improved water distribution gate with the linear gate hopper door, the water distribution plate is driven to rotate by 90 degrees, so that water flow can be discharged from the small water outlets of the gate body, the water discharge amount is controlled, meanwhile, the smaller the water outlets are, the larger the pressure of the water flow is, garbage accumulated at the gate body is flushed into the small water outlets on the partition walls, and the garbage is discharged by driving the circular blades to rotate. When the gate is opened, the cutting edge of the circular blade can extend out of the groove to cut fishing net plastic flowing through the groove, and the circular blade cuts garbage wound together into small blocks, so that the garbage is washed away by water flow, the garbage is prevented from blocking a water outlet of the gate, the water drainage effect is improved, and the garbage is prevented from being accumulated at the gate opening when the gate is opened.

The invention relates to the technical field of water purification systems, in particular to a multifunctional commercial drinking water supply system which comprises a front filtering device and a drainage device, and usable water generated by the front filtering device is input into a temperature control drainage device; the drainage device comprises a hot water tank, a cold tank and a UV sterilizer which are arranged in parallel; the output end of the hot water tank is a hot water outlet; a preheater is arranged on the first branch pipeline, and a first output end of the preheater directly discharges water to form a warm water outlet; the output end of the cold tank is connected with the UV sterilizer, and the output end of the UV sterilizer is a cold water outlet. The water quality is improved through multi-stage filtration, multiple sterilization is realized through front multi-stage filtration, rear activated carbon filtration and a rear heating sterilization or UV sterilizer, and the safety of drinking water is ensured. Through the combination of the cold tank and the medium unit and the combination of the hot water tank and the preheater, ice water, normal-temperature water and hot water can be supplied, and different people can supply drinking water at different temperatures.

The utility model provides an anti-backflow automatic quantity control drainage bag which comprises a drainage bag body, a drainage opening is formed in the top of the drainage bag body, a liquid leakage opening is formed in the bottom of the drainage bag body, the drainage opening is connected with a drainage tube, and a plurality of self-sealing strips are horizontally arranged in the drainage bag body at intervals. And the interior of the drainage bag body is horizontally divided into a plurality of parts by the self-sealing strips. Drainage liquid is contained in the drainage bag body, parts of the self-sealing strips are installed on the two faces in the drainage bag body respectively, medical staff and fingers outside the drainage bag body press the two parts of the self-sealing strips at the same time to seal the self-sealing strips, separation of the drainage bag body is completed, the magnetic cover covers the magnetic ring, and drainage is completed. According to the device, the needed drainage amount can be adjusted through medical staff, then the drainage opening can be automatically closed to complete drainage after drainage is completed, the medical staff does not need to take care of the device all the time, the workload of the medical staff is relieved, and the device is more convenient, easy to operate and practical.

The utility model discloses a magnetic type drainage pipeline installation auxiliary device capable of achieving rapid butt joint and positioning. The magnetic type drainage pipeline installation auxiliary device is provided with an auxiliary support used for positioning and supporting. Comprising a positioning assembly which is installed on the right side of the lower surface of the auxiliary support, the left side of the inner surface of the auxiliary support is rotationally connected with a threaded rod, the outer surface of the threaded rod is rotationally connected with a conveying belt, meanwhile, the outer surface of the threaded rod is in threaded connection with a moving part, and the moving part is provided with a limiting conveying mechanism. According to the magnetic type drainage pipeline installation auxiliary device capable of achieving rapid butt joint positioning, the auxiliary support facilitating positioning and supporting is arranged, a second drainage pipe which is already positioned and assembled is limited and clamped, a first drainage pipe is clamped in cooperation with a movable clamping jaw, and the first drainage pipe is conveyed after being clamped; and an electromagnet in the positioning claw is matched to be powered on, and magnetic attraction positioning work is carried out on the position of a magnetic attraction piece in the first water drainage pipe.

The present invention relates to the technical field of coal seam gas drainage, and specifically relates to a method for regional coal seam gas drainage in a monoclinic structure, which includes: designing the working face of the coal seam by adopting the longwall mining method along the strike in view of the monoclinic structure background; constructing inclined drainage directional boreholes at the working face in the high part of the mine structure; designing and constructing large-diameter drainage directional boreholes at the low part of the mine structure according to the borehole construction data, and installing a gate valve at the orifice of the boreholes to control the drainage intensity. After the construction of the large-diameter drainage directional boreholes is completed, hydraulic fracturing is carried out, and the fractures formed by the hydraulic fracturing communicate with the drainage directional boreholes, effectively discharging the accumulated water in the drainage directional boreholes; after the accumulated water is discharged, the orifice gate valve is closed, and drainage is regularly carried out during the gas drainage process. The present invention can achieve regional drainage of coal seam gas in a monoclinic structure background, and can carry out gas drainage across several sections or even the scope of one level at a time, solving the technical problem that it is difficult to achieve regional drainage in the prior art.

This application discloses an air conditioner, belonging to the field of air handling technology. The air conditioner includes a heat exchanger, a wetted membrane, a water supply system, a drip tray, a drainage system, and a controller. The water supply system supplies water to the wetted membrane and includes a water supply solenoid valve for opening or closing the system. The drip tray is located below the heat exchanger and the wetted membrane, with the bottom of the wetted membrane higher than the bottom of the heat exchanger. The drainage system includes a drain pump and a water level detection module. The controller is configured to: in dehumidification mode, control the drain pump to drain water from the drip tray; when the water level in the drip tray reaches the minimum water level detected by the water level detection module, output an alarm signal indicating a drainage system fault; in humidification mode, control the water supply solenoid valve to open; when the water level in the drip tray reaches the level detected by the water level detection module (higher than the bottom of the wetted membrane), control the water supply solenoid valve to close, thereby shutting off the water supply system's supply to the wetted membrane. This air conditioner can reduce system complexity and cost.

The invention discloses a drainage control method and device of a fuel cell and a nonvolatile storage medium. The method comprises the following steps: obtaining a current control combination of a drain valve in the fuel cell, the current control combination comprising an opening time length and a closing time length; under the condition that the drain valve is in the open state, based on the actual hydrogen pressure value in the fuel cell, adjusting the total duration corresponding to the current control combination to obtain a first total duration; under the condition that the opening state of the drainage valve continues to be opened for the duration, the drainage valve is closed; under the condition that the drain valve is in a closed state, adjusting the first total time length based on the current of a hydrogen circulating pump in the fuel cell to obtain a second total time length; and determining the next control combination of the drain valve according to the second total duration. According to the invention, the technical problem that too high or too low accumulated water in the fuel cell has adverse effects on the operation of the fuel cell is solved.

The utility model relates to the technical field of aquaculture, and discloses a drainage device for crab breeding in a rice field, which comprises a stable pressure regulating mechanism, a pressure regulating mechanism, a pressure regulating mechanism, a pressure regulating mechanism, a pressure regulating mechanism, a pressure regulating mechanism, a pressure regulating mechanism and a pressure regulating mechanism, and is characterized in that the stable pressure regulating mechanism comprises a stable box, and a first piston cylinder and a second piston cylinder are arranged on the upper surface of the stable box; through cooperation of a stable pressure regulating mechanism, a connecting piece, an impurity removing mechanism and a water draining mechanism, media in a first piston barrel, a stable box and a second piston barrel are compressed through a variable pressure assembly, so that the height of the connecting piece is adjusted, the height of the water draining mechanism is conveniently adjusted, water in a rice field is conveniently pumped, and the water draining efficiency is improved. The water level in the rice field is controlled by controlling the height of the water drainage mechanism, so that the water drainage efficiency in the rice field is improved, operation is easy and convenient, convenience is improved, sundries attached to the water drainage mechanism are conveniently scraped through vertical movement of the cleaning ring, the influence on the water flow efficiency is avoided, and the water drainage efficiency is improved.