3456 results about "Air chamber" patented technology

An inflatable mattress includes a main section and at least one minor section. The main section includes a main section lower wall having main section lower wall edges, a main section upper wall having main section upper wall edges, and at least one main section sidewall connecting between the main section lower wall edges and the main section upper wall edges to form a main section air chamber. The at least one minor section includes a minor section lower wall having minor section lower wall edges connected to a minor section upper wall having minor section upper wall edges to form a minor air chamber. The at least one minor section is connected to the main section by a first pivotable connection between one main section lower wall edge and one minor section lower wall edge, or a second pivotable connection between one main section upper wall edge and one minor section upper wall edge.

The technology described herein is directed towards one or more modular metasurfaces arranged with unit cells for sound absorption, in which the unit cells are based on Helmholtz resonators that are deployed proximate to a server, without substantially obstructing airflow from the server fan(s). Each sound absorbing unit-cells is designed and constructed based on a specific resonance frequency, and includes a neck portion and air chamber dimensioned to resonate at the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. The metasurfaces can be arranged in a modular frame structure of surrounding unit cells, positioned behind the server's fan(s), with an opening in the frame structure to facilitate airflow therethrough, without obstructing or substantially obstructing the airflow to the surrounding environment.

The technology described herein is directed towards modular metasurfaces arranged with unit cells for narrowband, wideband and / or multiband sound absorption, in which the unit cells are based on Helmholtz resonators that are deployed in a server rack, proximate to a server, without substantially obstructing airflow from the server fan(s). Each sound absorbing unit-cells is designed and constructed based on a specific resonance frequency, and includes a neck portion and air chamber dimensioned to resonate at the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. Differently-dimensioned unit cells can be built into a single metasurface module, thereby facilitating wideband and / or multiband sound absorption with that metasurface. The modular metasurfaces can be attached to the sidewalls of a server rack, or positioned in otherwise empty slots above and below a server, optionally coupled to blanking panels for covering the openings of those slots.

The invention discloses an intelligent pressure self-adaptive anti-bedsore nursing mattress system which comprises a flexible pressure sensing layer configured on the surface of a mattress and used for monitoring pressure distribution data of all parts of the body of a lying person in real time; the multi-air-chamber dynamic adjusting structure comprises a plurality of independent air chambers capable of being inflated and deflated, and the air chambers are distributed in the mattress and used for adjusting the supporting pressure of the corresponding areas according to instructions; the edge intelligent control module analyzes data based on a preset artificial intelligence algorithm to predict a bedsore occurrence risk area, and generates a control instruction according to a prediction result to drive the multi-air-chamber dynamic adjustment structure to adjust the pressure of each air chamber; and the environment regulation and control system comprises a temperature and humidity sensor and a microenvironment regulation device. Through real-time body pressure monitoring, AI risk prediction, dynamic pressure regulation and temperature and humidity coordinated regulation and control, local pressure can be remarkably reduced, a high-risk area can be early warned in advance, and a local microenvironment is improved, so that bedsores are effectively prevented, and nursing dependence is reduced.

The technology described herein is directed towards a metasurface arranged with unit cells for broadband and / or multiband sound absorption, in which the unit cells are based on the principles of Helmholtz resonators. Deeply subwavelength sound absorbing unit cells are designed and constructed based on desired resonance frequencies. Each unit cell includes a neck portion and air chamber dimensioned to resonate at a desired resonance frequency and thereby inverse phase cancel corresponding frequencies of incoming sound waves. Differently designed and arranged subgroups of unit cells are part of the metasurface, which can be positioned proximate to a noise source. As practical examples, the metasurface or multiple metasurfaces can be placed near or wrapped around a computer server or rack of servers to absorb fan noise. The metasurface components (including the unit cells) can be printed by a 3D printer to result in a thin, light-weight, and cost effective noise absorbing metasurface.

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies selected via interchangeable portions. A sound absorbing unit cell is designed and constructed in two parts based on a desired resonance frequency, such as a neck portion and air chamber portion. The portions are dimensioned such that when coupled together, Helmholtz resonators are formed that resonate at a desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. A portion with different dimensions can be interchanged to adjust the resonant frequencies to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies adjusted via MEMS actuators. A sound absorbing unit-cell is designed and constructed based on a general resonance frequency, and includes a neck portion and air chamber dimensioned to resonate close to the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. A bimorph MEMS actuator and / or moveable part in the resonators, controlled by a controller, facilitates changing of the airflow the unit cells to adjust the resonant frequencies thereof, to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

Systems and methods are disclosed for concentric suction cup tools with integrated air chambers. In one embodiment, an example picking assembly may include a vacuum manifold having a first integrated air pressure path and a second integrated air pressure path, and a first piston subassembly that includes a first air pipe, a first vacuum pipe, a first bushing disposed between the first air pipe and the first vacuum pipe, and a first suction cup, where the first piston subassembly is configured to independently actuate from a retracted position to an extended position. The picking assembly may include a second piston subassembly having a second air pipe, a second vacuum pipe, a second bushing disposed between the second air pipe and the second vacuum pipe, and a second suction cup, where the second piston subassembly is configured to independently actuate from the retracted position to the extended position.

The invention relates to a preparation method and system for an atomic gas chamber for sapphire coating, and the preparation method comprises the steps: S1, placing a cleaned atomic gas chamber on a heating base station of a reaction chamber, and filling the reaction chamber with replacement gas to discharge residual gas in the reaction chamber; s2, filling aluminum source gas into the reaction chamber, and carrying out chemical adsorption on the wall surface of the atomic gas chamber to form a first film layer; s3, filling replacement gas into the reaction chamber to discharge residual aluminum source gas in the reaction chamber; s4, filling oxide gas into the reaction chamber to oxidize the first film layer and convert the first film layer into an aluminum oxide film layer; s5, filling replacement gas into the reaction chamber to discharge residual oxide gas in the reaction chamber; and S6, repeating the steps S2 to S5 to form a preset number of aluminum oxide film layers with a preset thickness on the wall surface of the atomic gas chamber so as to form the atomic gas chamber with the sapphire coating film. The anti-shielding capability of the alkali metal atomic gas chamber can be enhanced, and the electromagnetic wave precision measurement performance of the atomic gas chamber is improved.

The invention discloses a photovoltaic-driven IDC electric-cooling linkage method and device, and belongs to the technical field of IDC electric-cooling linkage, and the method comprises the following steps: S1, constructing a gravity energy storage structure; s2, the gravity object is lifted to the highest point of the gravity object channel through the gravity energy storage structure; s3, air at the bottom of the gravity object channel is compressed for the second time, and a thermal cracking reaction is carried out; s4, thermal cracking gas generated by the thermal cracking reaction is drained, and combustion products are discharged into a gas storage chamber; s5, the generated steam waste heat pushes a turbine in a turbine chamber to do work for power generation; and S6, domestic hot water and night heating hot water are prepared, convective heat exchange is conducted, the low-temperature reclaimed water obtained after heat exchange is heated into high-temperature steam in a cooler, the high-temperature steam enters a turbine to become high-temperature reclaimed water, and the high-temperature reclaimed water flows into a control center or a water storage pool. The organic matter compressed garbage is used as a gravity object for gravity energy storage, and heavy oil, solid fuel, adsorbents and other high-value products are produced in the gravity energy storage process.

The invention relates to the technical field of water vapor concentration detection, and discloses a water vapor concentration online detection method and system based on a multi-wavelength infrared absorption spectrum, and the method comprises the steps: controlling an infrared light source module to emit pre-modulated light, enabling the pre-modulated light to pass through a gas chamber module, inputting the pre-modulated light into a photoelectric detection module, and converting the pre-modulated light into a sample electric signal; acquiring temperature data and pressure data at a preset position of the air chamber module in real time; calculating to obtain an initial differential absorption signal by using the sample electric signal and combining a Lambert-Beer law; based on the temperature data and the pressure data, performing temperature and pressure dynamic compensation on the initial differential absorption signal by using a pre-stored compensation database to obtain a target differential absorption signal; and determining the water vapor concentration according to the target differential absorption signal. According to the invention, the effects of improving the measurement precision and the measurement stability of the water vapor concentration and measuring the water vapor concentration online in real time can be achieved.

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies adjusted via a shared tuning element, e.g., a screw, or a piezoelectric actuator. A sound absorbing unit-cell is designed and constructed based on a general resonance frequency, and includes a neck portion and air chamber dimensioned to resonate close to the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. Collectively moveable floors in the resonators facilitate changing the resonators' air cavity dimensions, to adjust the resonant frequencies to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

The invention relates to a tide level obtaining method and system based on an OWC wave energy conversion device. The method comprises the following steps: constructing an energy loss prediction model in the air chamber; acquiring field incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and pneumatic output energy at the current time period; inputting incident wave energy and reflected wave energy into the model to obtain predicted energy loss; and the tide level variation is solved based on the energy conservation relational expression, and the current tide level is calculated. The system comprises an energy loss prediction module, a wave energy acquisition module, a water body energy acquisition module, a pneumatic output acquisition module, an energy loss calculation module, a tide energy solving module and a tide level calculation module, which cooperatively realize the method. According to the scheme, an external tide gauge station is not needed, the local sea area tide level can be inversed in situ, at high frequency and with high precision, the method is suitable for an OWC-breakwater fusion scene, and cooperative operation of a port and ocean energy is supported.

The invention belongs to the field of drilling, and particularly relates to a large-diameter cluster type pneumatic down-the-hole hammer raise-boring reamer bit and a drilling method.The bit comprises a center pipe, a cluster body, an air chamber, a down-the-hole hammer, a synchronous check valve, an air chamber pressure balance control assembly and a concave slag falling channel and is used for transmitting torque and rotating speed and conveying high-pressure air; the top of the central pipe is sleeved with a flange used for being connected with a drill rod, the central pipe is sequentially sleeved with a front guide wing plate, an upper fixing plate, a middle plate, a high-frequency rear seat, an air chamber peripheral cylinder and an air chamber lower cover plate in the extending direction of the central pipe, and the front guide wing plate, the upper fixing plate, the middle plate, the high-frequency rear seat, the air chamber lower cover plate and the central pipe jointly form a cluster body; two ends of the air chamber peripheral cylinder are respectively connected with the high-frequency rear seat and the air chamber lower cover plate to form an air chamber; according to the drill bit, the multiple down-the-hole hammers are integrated through the cluster body, efficient rock breaking and continuous slag discharging are achieved in combination with air chamber energy gathering, synchronous check valve control and a concave slag falling channel, and the drilling efficiency is improved by more than 10 times.

The invention provides a water vapor interference resistant sensor air chamber and a dynamic dehumidification method thereof.The sensor air chamber is characterized in that an acquisition control module, a temperature acquisition assembly and a heating and heat preservation assembly are arranged in an air chamber structure assembly, and the acquisition control module is connected with the temperature acquisition assembly and the heating and heat preservation assembly; the heating and heat preservation assembly is arranged on the outer side of the sensor, the collection control module carries out data processing and regulation and control parameter calculation, and precise moisture-proof control is achieved. Meanwhile, the invention discloses a dynamic dehumidification method. In combination with the change of sensor signals and the moisture condensation temperature under different temperature conditions, the heating and heat preservation assembly is started to heat the air chamber, so that the temperature of the air chamber is always higher than the dew point temperature and is fixed as the temperature difference value of the air chamber temperature and the environment temperature, and the moisture is effectively prevented from condensing in the air chamber or interfering a detection signal; the problem that the sensor is prone to false alarm in the humid environment is solved, data are stable and reliable in the humid environment, and detection precision and stability are improved.

The invention discloses a redundant braking control method of an automatic driving vehicle and a storage medium, which are applied to a vehicle control unit. According to the method, when it is detected that an automatic driving module, anti-collision early warning or remote monitoring triggers a braking demand, the target deceleration is calculated in combination with the vehicle speed and the obstacle distance. By collecting the actual acceleration, the parking air chamber air pressure and the motor torque, the total braking force is estimated, the electronic parking braking force is separated out, and then the road adhesion coefficient is calculated. And in the redundant braking mode, according to the target deceleration, the attachment condition and the capacity upper limit of the two systems, performance indexes including deceleration deviation and a parking penalty term are constructed, and the target motor deceleration and the target electronic parking deceleration are obtained through joint distribution. And finally, the target parking deceleration is converted into target air pressure through the deceleration air pressure mapping table containing the online correction amount, the air pressure is adjusted through closed-loop control, and accurate and stable redundant service braking is achieved.

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies adjusted via actuators, e.g., piezoelectric motors. A sound absorbing unit-cell is designed and constructed based on a general resonance frequency, and includes a neck portion and air chamber dimensioned to resonate close to the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. Moveable partitions in the resonators, controlled by piezoelectric actuators, facilitates changing of the resonators' air cavity dimensions, to adjust the resonant frequencies to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

The three-dimensional shaping cloth flattening device comprises a base, a top plate and a lifting plate, a constant-pressure flattening head is arranged on the bottom face of the lifting plate, the constant-pressure flattening head comprises a constant-pressure air chamber shell, a flexible pressurizing bag and a constant-pressure mechanism, and the flexible pressurizing bag and the constant-pressure air chamber shell are connected in a sealed mode to jointly form a closed cavity; the constant-pressure mechanism is mounted in the constant-pressure air chamber shell and is used for providing constant reference pressure for the flexible pressurizing bag; a driving mechanism is fixedly arranged on the upper surface of the top plate and used for driving the constant-pressure leveling head to move relatively. According to the three-dimensional cloth flattening device, the problem that three-dimensional cloth is not completely flattened or damaged due to uneven pressure can be solved, and the high-quality and lossless three-dimensional flattening effect is achieved.

The invention discloses a relay bin device capable of intelligently detecting and adjusting the mineral height and a deep-sea mining system.The relay bin device comprises a relay bin, a height adjusting unit, a detecting unit and a self-cleaning unit, the height adjusting unit comprises a shell assembly, an air bag assembly and a piston assembly, the shell assembly is arranged in the relay bin, and the air bag assembly is arranged in the relay bin; the air bag assembly is arranged in the shell assembly, a high-pressure air chamber is formed in the air bag assembly, the movable end of the piston assembly extends into the high-pressure air chamber and is in sealed sliding connection with the high-pressure air chamber, and the movable end of the piston assembly can move up and down in the axial direction of the relay bin by inflating and deflating the high-pressure air chamber so as to adjust the height of mineral particles; the detection unit comprises a high-pressure waterproof radar and a high-pressure waterproof ultrasonic sensor, and the high-pressure waterproof radar and the high-pressure waterproof ultrasonic sensor are arranged on the two sides of a discharging port of the relay bin respectively; the cleaning end of the self-cleaning unit faces the high-pressure waterproof ultrasonic sensor and is used for cleaning the high-pressure waterproof ultrasonic sensor regularly.

The invention discloses a spiral resonance photoacoustic cell and an operation method, the spiral resonance photoacoustic cell comprises a gas chamber straight tube, a spiral tube, an optical fiber collimator and an optical fiber F-P sonic sensor, the two ends of the gas chamber straight tube are open, the two ends of the spiral tube are communicated with the gas chamber straight tube, an acoustic resonance point is formed at the center of the spiral tube, and the optical fiber F-P sonic sensor is arranged in the central area of the spiral tube; and the optical fiber collimator is arranged at one end of the air chamber straight pipe. The spiral pipe is wound outside the air chamber straight pipe, the spiral pipe is communicated with the air chamber straight pipe, the structural design of the spiral pipe enables the spiral pipe to form acoustic resonance at a specific frequency, and the optical fiber F-P sonic sensor obtains a photoacoustic signal; compared with a conventional resonance photoacoustic cell, the physical volume of the resonance photoacoustic cell is greatly compressed, and the system integration level is effectively improved. More importantly, under the condition that a compact appearance similar to that of a non-resonant photoacoustic cell is kept, the device amplifies the photoacoustic signal intensity by several times through an acoustic resonance effect, and the detection sensitivity and the signal-to-noise ratio of the system are remarkably improved.

The invention discloses a light path system based on a gas-filled hollow-core optical fiber, and the system comprises a spectrum broadening device which comprises a first gas extraction chamber, a gas inlet chamber and a second gas extraction chamber, the first gas extraction chamber and the second gas extraction chamber are located at the two ends of the gas inlet chamber respectively, and the first gas extraction chamber and the gas inlet chamber are separated through a first sealing part; the second air exhaust chamber and the air inlet chamber are separated through a second sealing piece; the spectrum broadening device is internally provided with a hollow-core optical fiber and is provided with at least one through hole penetrating through the pipe wall of the hollow-core optical fiber, the two ends of the hollow-core optical fiber penetrate through the first sealing piece and the second sealing piece respectively so that the two ends of the hollow-core optical fiber can be communicated with the first air suction chamber and the second air suction chamber respectively, and the through hole is located in the air inlet chamber. The two ends of the hollow-core optical fiber are subjected to air exhaust, so that the ionization rate and the self-focusing effect generated when the laser is output after the spectrum of the inflated hollow-core optical fiber is broadened can be remarkably reduced, the requirement for improving the power input of the laser is met, and a light path system can bear higher laser monopulse energy compression.

A press (1) for pressing liquid-containing material (2), in particular grapes, comprises a flexible, liquid-tight, sack-shaped press container (10) with a juice outlet (14) formed on its bottom (10b) which can be closed by a juice drain valve (12) and a pressure medium chamber (30) formed on its outer wall (10a) which includes a circumferential, self-contained air chamber (32) which can be filled with compressed air via a valve (34), a sack-shaped inner container (40) made of liquid-permeable flexible mesh fabric which can be inserted into the interior of the sack-shaped press container (10) and which can be filled with material (2), and closure means (50) with which the sack-shaped press container (10) can be closed in a substantially liquid-tight manner after the sack-shaped inner container (40) has been inserted. The invention further relates to a method for pressing liquid-containing material (2) using such a press (1).

The utility model provides a gas insulated switchgear (GIS) gas chamber sulfur hexafluoride (SF6) micro-water density monitoring sensor, and relates to the technical field of high-voltage electrical equipment state monitoring and sensors. The sensor comprises a sensor main body, an immersion type probe, a micro heating module and a communication module, the sensor body is a sealed shell, and a data processing unit and a power interface are arranged in the sensor body. The immersion type probe penetrates through the bottom of the main body and is fixedly connected with and exposes the pressure, humidity and temperature sensor. The micro-heating module is fixed on the surface of the probe and electrically connected with the humidity sensor. And the data processing unit is integrated with a temperature compensation module and is in signal connection with the pressure and temperature sensor. And the communication module is arranged at the top of the main body, comprises an RS485 interface and is connected with the data processing unit to realize data transmission. The sensor is used for monitoring the micro-water density of SF6 gas in a GIS gas chamber, and solves the technical problem of how to realize high-precision and anti-interference real-time online monitoring of the micro-water density on the premise of not discharging the SF6 gas.

The invention relates to the technical field of egg inoculation, in particular to an egg inoculation machine capable of achieving safe inoculation and an operation method.The egg inoculation machine comprises a conveying unit, an optical detection unit, a mechanical arm assembly and an inoculation assembly; the conveying unit is used for conveying eggs, the position of an air chamber is recognized through the optical detection unit, an injection point is determined, the inoculation assembly is installed on the mechanical arm assembly, and the mechanical arm assembly drives the inoculation assembly to conduct inoculation along the injection point; according to the egg inoculation machine, after punching is completed, the injection needle tube is directly inserted into an egg along a punched hole for safe inoculation, the requirement for visual positioning of the hole can be reduced, a mechanical arm assembly low in precision can be used, and the device cost is reduced.

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies adjusted via MEMS actuators. A sound absorbing unit-cell is designed and constructed based on a general resonance frequency, and includes a neck portion and air chamber dimensioned to resonate close to the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. A moveable partition in the resonators, controlled by MEMS actuators, facilitates changing of the resonators' air cavity dimensions, to adjust the resonant frequencies to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

The need for a foaming bottom-dispensing package that dispenses liquid compositions in a foamed state from the bottom of the package, while being able to be kept for long durations in a bottom-dispensing orientation and without the need to invert the container for the air reservoir to be replenished, while also being resistant to leakage, even when there is no closing cap, is met by incorporating a foamer body into the base of the bottom-dispensing package.

The utility model provides a battery which comprises a shell, a current collecting disc and an insulating spacer, and the current collecting disc is arranged in the shell; along the axial direction of the battery, the insulating spacer is connected between the current collecting plate and the shell, and a groove is formed in one side, facing the current collecting plate, of the insulating spacer; the volume of the groove is M21, the maximum thickness of the insulating spacer is M22, the area of the insulating spacer is M23, and M21 is larger than or equal to 10% * M22 * M23; due to the arrangement of the groove, an air chamber space can be reserved in the shell, so that an expansion space can be reserved for the roll core in the shell, and the use safety of the battery is ensured; meanwhile, the internal pressure of the shell can be reduced, so that the use safety of the battery is ensured; besides, on the premise that the original size of the shell is not influenced, a part of internal space of the shell is reserved, so that the shell is prevented from being completely filled with entities, the safety of the battery is further ensured, the overall weight of the battery is reduced, and the lightweight design requirement of the battery is met.

The utility model relates to the technical field of fresh air settling treatment, in particular to a fresh air settling chamber for a clean room, which comprises a settling chamber main body, a partition plate is arranged in the settling chamber main body, a collecting structure is arranged on one side of the partition plate, and side plates are mounted on two sides of the inner wall of the settling chamber main body; through the collecting structure, when air is treated, air in the clean room is introduced into the air inlet pipe, at the moment, after the air is pretreated through the air inlet structure, the air enters the space between the side plates on the two sides, large dust particles in the air fall down under the influence of the gravity of the dust particles and are stuck and fixed by the sticking belt below, and dust is prevented from being blown by wind to fly around; when the adhesive tape on one side is fully paved with dust particles, the output shaft of the adhesive tape can drive the rotating rod to rotate through driving of the servo motor, so that one side of the collecting roller is replaced, and when the adhesive tapes on the four sides are fully paved with dust, the cover plate is taken down, and the adhesive tapes are torn down one by one and replaced. Therefore, the purposes of collecting dust and preventing dust particles from returning to the air chamber are achieved.

The utility model discloses an aeration membrane tube and a hoisting type aeration system. The aeration membrane tube comprises an air inlet joint, a supporting tube and a porous membrane tube, the supporting pipe is connected with the air inlet connector, the supporting pipe and the air inlet connector form an air distribution chamber, the air distribution chamber is separated from an inner cavity of the supporting pipe, and an opening for communicating the inner cavity of the supporting pipe with the outside is formed in the tail end, away from the air inlet connector, of the supporting pipe. The porous membrane tube is sleeved outside the supporting tube, at least one end of the porous membrane tube is annularly fixed through a clamp, a gap between the porous membrane tube and the side wall of the supporting tube forms an inflation space, and an air inlet communicated with the inflation space is formed in the side wall of the air distribution chamber. The buoyancy of the air cavity during aeration is counteracted by utilizing gravity, the aeration membrane tube does not need to be fixed by adopting a fixing bracket, the mounting process is simplified, the cost is reduced, the aeration membrane tube is hoisted and fixed, the relative levelness of the aeration membrane tube can be controlled at the top of the tank, the same aeration water depth and aeration uniformity are ensured, and the aeration efficiency is improved. And the aeration system can be mounted and overhauled outside the tank body.

A method for adjusting pressure within an air bed comprises providing an air bed that includes an air chamber and a pump having a pump housing, selecting a desired pressure setpoint for the air chamber, calculating a pressure target, adjusting pressure within the air chamber until a pressure within the pump housing is substantially equal to the pressure target, determining an actual chamber pressure within the air chamber, and comparing the actual chamber pressure to the desired pressure setpoint to determine an adjustment factor error. The pressure target May be calculated based upon the desired pressure setpoint and a pressure adjustment factor. Furthermore, the pressure adjustment factor may be modified based upon the adjustment factor error determined by comparing the actual chamber pressure to the desired pressure setpoint.