123results about How to "Adjustable flow rate" patented technology

The invention relates to a dynamic running water type toxicity test device of fishes. The invention is characterized in that the test device is a frame which is internally provided with a plurality offish tanks; each fish tank is respectively matched with a corresponding drug feeding container and a drug feeding peristaltic pump; the drug feeding container, the fish tank and the drug feeding peristaltic pump are connected mutually by drug conveying pipes; each fish tank is also respectively matched with a corresponding circulating water tank and a circulating water pump; and the fish tank, the circulating water tank and the circulating water pump are connected mutually by liquid conveying pipes.

The invention relates to timbers, pharmaceuticals, foods and chemical products, in particular to a heating and blowing device for a large hot air drying room. A plurality of fans (1) are disposed in a rectangular fan support frame (12). Gaps among the fans (1) are blocked by air blocking plates (13). The fans are linked by a synchronization rotation linkage mechanism (2) for synchronous horizontal rotation. The fan support frame (12) is fixed on a rectangular movable frame (17). Rollers (19) embedded into guide rails (18) on two sides are disposed on two sides of the fan support frame (12). An air guide component (4) is disposed on a blowing side of each fan (1). A plurality of radiators (6) corresponding to the fans (1) are disposed at two ends of the guide rails. Three arc flow deflectors (11) are disposed at three inner included angles of the drying room. By the heating and blowing device, power consumption is lowered greatly, operation cost and drying cost are lowered, the drying room is enabled to be efficient, energy-saving and widely applicable, timbers of two or more different kinds or of different thicknesses can be evenly dried simultaneously, production efficiency is increased, and drying operations are highly flexible.

The invention relates to a circuit-type fishpond breeding system integrating a circulating water treatment process. The circuit-type fishpond breeding system integrating the circulating water treatment process comprises a fishpond shaped like an annular runway, and sewage treatment systems arranged in an inner ring of the fishpond. Each sewage treatment system comprises a vertical flow type solid-liquid separator (1), wherein a sewage discharging groove (5) perpendicular to the water flow direction is formed in the bottom of the fishpond and communicated with an inlet of the vertical flow type solid-liquid separator (1), an outlet of the vertical flow type solid-liquid separator (1) is communicated with a micro-filtration machine (2), outlet water of the micro-filtration machine (2) adopts a water pump (3) and a water lifting pipe (4) for water lifting and is injected into a biological filter (6), the biological filter (6) is separated from an aeration oxygenation pond (8) through a separation plate and is communicated with the aeration oxygenation pond (8) through a through hole in the lower portion of the separation plate, a water falling pipe (7) is arranged on the lateral wall of the aeration oxygenation pond (8) and communicated with the fishpond, and the water outlet direction at the bottom of the water falling pipe (7) is the same as the water flow direction of the fishpond. The number of the sewage treatment systems is two, and the sewage treatment systems are evenly distributed in the inner ring of the annular fishpond in a central symmetry mode.

The invention discloses a refrigeration-only air conditioner and a control method of the refrigeration-only air conditioner. The refrigeration-only air conditioner comprises a double-cylinder compressor, an outdoor heat exchanger and an indoor heat exchanger assembly. The double-cylinder compressor comprises a shell, a first air cylinder and a second air cylinder, and the value of the volume ratio of the first air cylinder to the second air cylinder ranges from one to twenty. The outdoor heat exchanger is provided with a flow-in port and two flow distribution ports. The indoor heat exchanger assembly comprises a first indoor heat exchange portion and a second indoor heat exchange portion, wherein the two ends of the first indoor heat exchange portion are connected with a first air suction portion and one of the flow distribution ports respectively, the two ends of the second indoor heat exchange portion are connected with a second air suction portion and one of the flow distribution ports respectively, a throttling element is arranged between the first indoor heat exchange portion and the outdoor heat exchanger in series, and a throttling element is arranged between the second indoor heat exchange portion and the outdoor heat exchanger in series. The refrigeration-only air conditioner is high in level of energy efficiency, and good in effect of energy saving.

The invention belongs to the field of composite material forming technology and mainly relates to a liquid resin defoaming method and device for vacuum infusion forming of composite material. In the defoaming method, mixed liquid resin enters a defoaming device (13) and continuously flows over a plurality of layers of spiral laminar flow plates of the defoaming device; the defoaming device (13) is in a continuous vacuum state to increase the surface area of the liquid resin, even if the liquid level of the liquid resin becomes a thin layer with extremely small thickness, the pressure difference of the defoaming device instantaneously amplifies the volume of bubbles in the liquid resin, and the bubbles are removed quickly under the continuous vacuum state; and the liquid resin which is defoamed is directly connected to the vacuum infusion forming site of the composite material to carrying out infusion forming of a composite material product (9) in a vacuum state, and thus, the integration of defoaming and infusion of the liquid resin is realized.

The invention provides a two-dimensional flow display device, relating to flow field display equipment in the fluid mechanics. The two-dimensional flow display device is provided with an integrated framework, a hydraulic loop and a flow display control mechanism, wherein the hydraulic loop is arranged on the integrated framework; the integrated framework is provided with a lower bottom plate, an upper end plate, a left side plate, a right side plate and an experiment table; the hydraulic loop is provided with a lower water tank, a hydraulic pump, a one-way pump, a water transmission pipe, an upper water tank, a throttle valve, a water outlet pipe and an overflow pipe; and the flow display control mechanism is provided with fluid guide wires, pull wires and weights. The two-dimensional flow display device is simple and convenient to manufacture, lower in cost, small in occupied space and convenient to move; a soap solution film flowing perpendicularly and circularly is adopted as a display platform; the width of the soap solution film is adjustable; the flow rate and the speed of the water current at a water outlet are adjustable as well; and therefore, the motion state of the fluid can be clearly exhibited, the partial phenomenon of the fluid can be observed, and the short-distance observance and knowledge about the evolution of a flow phenomenon can be formed.

The present invention relates to the production field of casting technique, in particular to an automatic pouring method and system for a heat preserving furnace pouring platform. By collecting an inclined effluent angle of a heat preserving furnace of the heat preserving furnace pouring platform, a pouring reference datum angle of the heat preserving furnace satisfying the pouring amount is obtained. If the inclined angle of the heat preserving furnace is equal to the pouring reference datum angle, the heat preserving furnace stops inclining. After a predetermined time, a molten steel image from a diversion trench discharge hole to a pouring mold gate is collected, and a molten steel flow velocity value is obtained according to the molten steel image. The extracted molten steel flow velocity value is compared with a corresponding predetermined velocity range. When the molten steel flow velocity value exceeds the corresponding predetermined velocity range, the inclined pouring angle of the heat preserving furnace is adjusted to control the flow velocity of the molten steel within the corresponding predetermined velocity range, so as to solve the problems of the existing technology that the inaccurate control on the pouring angle causes molten steel waste when the heat preserving furnace automatically pours, and the pouring efficiency is low.

The invention provides an electrochemical testing experimental device for dynamic corrosion of a metal. A main body is a gutter channel, and the whole gutter channel is made of polytetrafloroethylene, wherein a transparent PVC reference electrode sleeve plate is arranged above the gutter channel, and is used for placing and fixing a reference electrode; a counter electrode fixing pressure plate and a working electrode fixing pressure plate are arranged below the gutter channel, and are used for fixing a counter electrode, a working electrode and an external interface and preventing two electrode contact holes in the gutter channel from water leakage. An electrochemical workstation and a circulating water system are started to start an electrochemical testing experiment in dynamic corrosion, and experimental results such as a potentiodynamic polarization curve and an alternating current impedance spectrum of dynamic corrosion of a sample are observed on a computer to acquire metal corrosion characteristics in a dynamic corrosion process. The device has the advantages that compared with another corrosion experimental method, a manner of changing original static corrosion into dynamic corrosion has the advantages that a practical corrosion condition can be simulated better and a corrosion condition can be monitored in real time to facilitate better analysis on a corrosion mechanism for a metal material in a flow-induced corrosion environment.

The invention discloses a high temperature molten salt corrosion simulation device. The device comprises a main container, a dynamic sample hanging system, a static sample hanging system, and an electrode system. The top of the main container is connected to a kettle cover; a crucible is arranged in the main container; the crucible is fixedly connected to the main container through a crucible support, an electric heating belt is paved on the external wall of the crucible support; the dynamic sample-hanging system comprises a rotation disc for embedding a sample, a motor rotation main rod, and a ceramic sample hanging rod, the motor rotation main rod penetrates the kettle cover and stretches into the crucible, the lower end of the motor rotation main rod is connected to the rotation disc, the upper end is connected to a rotation motor, the circumferential edge of the rotation disc is provided with the ceramic sample hanging rod, a sample is arranged on the ceramic sample hanging rod; the static sample hanging system comprises a ceramic hanger rod, the ceramic hanger rod stretches into the crucible through the kettle cover; and the electrodes system is connected to the static sampling hanging system and is also externally connected to a conventional electrochemical station. The provided device can provide a molten salt flowing speed and corrosion speed required by the experiments and simultaneously simulates the corrosion states of static parts and dynamic parts in different atmospheres.

The invention discloses a dynamic parameter measuring system for a humidity sensor. The system comprises two humidity generators, two humidity sensor testing chambers, two wind velocity adjusting devices, a pneumatic switching device, a (temperature, humidity and wind velocity) measuring unit, a control unit and a measurement and control computer. The two humidity generators generate high-humidity gas and low-humidity gas at different temperatures respectively; and the high-humidity gas and the low-humidity gas generate required wind velocities through the wind velocity adjusting devices. The pneumatic switching device implements quick switching of the humidity sensor between a high-humidity gas source and a low-humidity gas source. The invention provides the measuring system for measuring the parameters such as error, response time, dampness stagnation and the like of the humidity sensor at different wind velocities, different temperatures and different humidity step values.

The invention relates to an all-weather photocatalytic air purification system which is composed of an energy supply system and a purification system, wherein a solar cell panel in the energy supply system is connected with a storage battery and is connected with the purification system through a storage battery power supply and transmission line; a solar water heating glass tube is distributed on the surface of the solar cell panel; a water inlet of the solar water heating glass tube is connected with a water outlet of purification system cooling water; the center of an air purifier box in the purification system is provided with a purifier air purification reaction channel; a titanium wire mesh fixer is fixed in the purifier air purification reaction channel; a solid TiO2 titanium wire mesh is fixed on the titanium wire mesh fixer; a plurality of ultraviolet lamps are arranged at the periphery of the purifier reaction channel; and ventilating fans are respectively arranged above and below the purifier air purification reaction channel. The all-weather photocatalytic air purification system can be used in public places such as super markets, factories, schools, hospitals and the like; and meanwhile, the all-weather photocatalytic air purification system can be conveniently mounted on the roof or balcony of a house and be used as a practical multifunctional air purifier combining the three functions of air purification, hot water supply and solar power generation.

The invention discloses a water treatment device combining multiple physical methods. The water treatment device is characterized by comprising a water treatment unit (1), wherein the water treatment unit (1) comprises an ultrasonic, ultraviolet and ozone combined reactor (2) and a plasma generator (3), and a water outlet of the ultrasonic, ultraviolet and ozone combined reactor (2) is connected with a water inlet of a Y-shaped reactor (6) through a liquid pump (4) and a liquid flowmeter (5); the top end of the ultrasonic, ultraviolet and ozone combined reactor (2) is communicated with the plasma generator (3) through a second gas circulating pipeline (42). According to the water treatment device combining the multiple physical methods, sewage is treated by comprehensively utilizing methods of ultrasonic, ultraviolet, ozone, plasma, TiO2 catalysis and the like; besides, the problems of large occupied area, high energy consumption, long single treatment time, low utilization rate of active matters in plasma and the like of a wastewater treatment device in the prior art are further solved.

The invention discloses a medical ultrasonic atomization treating device. The medical ultrasonic atomization treating device comprises a shell, a chassis is arranged below the shell, a universal wheelis fixed at the lower end of the chassis, a heating chamber is formed in the shell, a heating rod is arranged at the bottom end of the heating chamber, a temperature sensor is arranged on the inner wall of the heating chamber, and the heating chamber is connected with an atomization chamber through a flow guiding pipe; an ultrasonic transducer, an ultrasonic generator, a water level sensor and aninfrared sterilizing lamp are arranged in the atomization chamber, and the atomization chamber is connected with a draught fan through an air feeding pipe; a storage battery is installed in the shell, a water draining pipe is connected to the bottom end of the atomization chamber, a fog discharging pipe and an atomization flexible pipe are connected on an atomization chamber cover plate, and an atomization mask is connected to the output end of the atomization flexible pipe; a controller is arranged on the atomization chamber cover plate, and a touch display screen, a buzzer, a switch and aninfrared receiver are arranged on the controller. The medical ultrasonic atomization treating device has the advantages of being simple in structure and high in practicability.

The invention discloses dispersion test equipment suitable for low-permeability soil. The dispersion test equipment comprises a water pressure chamber and a permeameter chamber for accommodating a testing earth-pillar; the water pressure chamber communicates with a pressurizing chamber; the permeameter chamber is arranged in the water pressure chamber and comprises a top disc of the permeameter chamber, a bottom disc of the permeameter chamber and a cylindrical flexible side wall, wherein the top disc of the permeameter chamber and the bottom disc of the permeameter chamber are hermetically connected to two ends of the flexible side wall, separately; and the bottom disc of the permeameter chamber is connected to a tracer agent injection assembly, and the top disc of the permeameter chamber is connected to a tracer agent collecting and detecting assembly. The dispersion test equipment disclosed by the invention has the advantages that under the water pressure action of the water pressure chamber, the testing earth-pillar is tightly wrapped by the flexible side wall, so that side wall permeation caused by a gap between the testing earth-pillar and the flexible side wall is avoided; meanwhile, the testing earth-pillar is kept in a tight state by means of the water pressure, and is unlikely to break.

The present invention discloses a plasma and ultrasonic and catalysis combined cascading style water treatment device characterized by comprising a water treatment unit (1), the water treatment unit (1) comprises an ultrasonic ozone united reactor (2) and a plasma generator (3), a water outlet of the ultrasonic ozone united reactor (2) is connected with a water inlet of a Y-type reactor (6) by a liquid pump (4) and a liquid flow meter (5), the top of the ultrasonic ozone united reactor (2) is in communication with the plasma generator (3) through a second gas circulation pipe (42). The plasma and ultrasonic and catalysis combined cascading style water treatment device treats wastewater by comprehensive utilization of ultrasound, ozone, plasma, TiO2 catalysis and other methods; in addition, the plasma and ultrasonic and catalysis combined cascading style water treatment device also overcomes the problems of large floor area, high energy consumption, long single treatment time and low utilization of active materials in plasma, and the like of wastewater treatment devices in the prior art.

The invention discloses a humidifier for a proton exchange membrane fuel cell, belonging to the technical field of fuel batteriecell s. The humidifier mainly comprises an external cylinder, an internal cylinder, a spiral blade and a transmission shaft, wherein the spiral blade is fixedly arranged on the outer surface of the internal cylinder, a micropore iss are arranged in the wall of the internal cylinder, and the internal cylinder is connected with the transmission shaft by a connecting rod. The humidifier is used for humidifying before raw material gas of the proton exchange membrane fuel cell enters an electric pile, and fully utilizing moisture and heat in tail gas, can adjust the pressure of the humidified gas, has the advantages of being energy-saving, high-efficiencyt, and convenient to adjust, meets the raw material gas humidifying requirement and the pressure requirement for entering the electric pile, the energy consumption and cost of a fuel battery cell system can be reduced and lowered, the volumsize is decreased, and the effects are obvious.

The invention relates to the technical field of one-way valves, and discloses a throttle valve with a cleaning structure and a flow-slowing structure and capable of adjusting the flow rate. Accordingto the throttle valve, a screw rod (8), a supporting plate (9), a threaded joint (10), a clamping plate (14), a brush (20) and the like are arranged, water flow pushes the clamping plate (14) so thatthe supporting plate (9) can move and rotate on the screw rod (8) through the threaded joint (10), and therefore the brush (20) on the clamping plate (14) is driven to clean the interior of a valve body; and meanwhile, a buffer spring (13) is matched to drive the supporting plate (9) to move and rotate back and forth, and therefore the brush (20) can clean the interior of the valve body all the time, sundries such as moss which can destroy water quality can be prevented from growing in the valve body, periodical cleaning is not needed, and the labor burden of workers can be greatly reduced.

The invention relates to a microflow driving device based on osmosis. Two floor plates sandwiched by a semipermeable membrane and installed between two tank bodies of aqua storage tanks with constant volume body and connected by bolt and nut. Two tank bodies all have one vent of aqua storage tank. One inlet or outlet of one aqua storage tank is provided on the outer sidewalls of the two tank bodies and one opening communicated with the cavity for storing liquid is respectively on the corresponding point of the inner wall of the two tank bodies. The minipores are all dispersed on the two floor plates, wherein the aperture diameter of minipore is 0.4-2mm and the cutoff molecular weight of semipermeable membrane is less than the molecular weight of infiltration driving agent. On running, the aqua storage tank is filled with deionized water and another aqua storage tank is filled with infiltration driving agent, therefore the gas of the two aqua storage tanks are removed and the flow speed and stability of micropump can be measured after closing the vent. The whole structure is simple and the cost is low. The microflow driving device is convenient for carrying without external resource and continuously serves for many days and the liquid flow is stable, adjustable without pulse.

The invention discloses a cold and warm air conditioner and a control method. The cold and warm air conditioner comprises a double-cylinder compressor, a reversing assembly, an outdoor heat exchanger and an indoor heat exchanger assembly; the double-cylinder compressor comprises a first air cylinder and a second air cylinder, the value of the volume ratio of the first air cylinder to the second air cylinder ranges from 1 to 20, the reversing assembly comprises an exhaust valve port, a first outdoor connecting valve port, a second outdoor connecting valve port, a first indoor connecting valve port, a second indoor connecting valve port, a first air suction valve port and a second air suction valve port; the indoor heat exchanger assembly comprises a first indoor heat exchange portion and a second indoor heat exchange portion, the two ends of the first indoor heat exchange portion are connected with the first indoor connecting valve port and the second end of a heat exchange flow way, and the two ends of the second indoor heat exchange portion are connected with the second indoor connecting valve port and the second end of the heat exchange flow way. According to the air conditioner, the energy efficiency level of the cold and warm air conditioner can be optimized, and the energy-saving effect is good.

The invention discloses an electrically-charged oil-change device in a transformer switch room and an application method thereof. The device comprises a fresh oil storage room, an old oil storage room, an oil transporting pipeline, an oil pumping pipeline and an exhaust pipeline, wherein the outlet of the oil pumping pipe is connected with the old oil storage room, a first oil filter and a first valve are arranged on the oil pumping pipeline in sequence; the inlet of the oil transporting pipe is connected with the fresh oil storage room, a second valve, a second oil filter and a fourth valve are arranged on the oil transporting pipeline in sequence; the inlet end of the exhaust pipe is connected with the oil transporting pipeline between the second valve and the second oil filter; and a third valve is arranged on the exhaust pipeline. When the device is in application, the outlet of the oil transporting pipe and the inlet of the oil pumping pipe are respectively connected with an oil tank in the switch room; through changing the combination of the switch condition of each valve, and combining with the oil filter driving and transformer oil pressure in the switch room, gas in the pipelines is subjected to an evacuation process and followed oil change. In the invention, the device can not only ensure the normal operation for a main transformer on-load tapping switch at the same time of realizing oil change, but also ensure the security and reduce the cost of the device.

The invention discloses a constant flow injection pump system and a cell magnetic sorting device. The constant flow injection pump system comprises a first plunger pump, a second plunger pump, a first check valve, a second check valve, a third check valve, a fourth check valve, a liquid outlet pipe and a liquid inlet pipe; the outlet of the first plunger pump is respectively connected with the inlet of the first check valve and the outlet of the second check value; the outlet of the first check value is connected with the liquid outlet pipe; the liquid inlet pipe is respectively connected with the inlet of the second check valve and the inlet of the third check valve; the outlet of the second plunger pump is respectively connected with the outlet of the third check valve and the inlet of the fourth check valve; the outlet of the fourth check valve is connected with the liquid outlet pipe. According to the constant flow injection pump system, liquid can be kept stable and constant in flow rate, and the flow rate can be regulated; the cell magnetic sorting device is simple in structure, efficient and reliable, and is suitable for continuous high-capacity magnetic cell separation; the device integrates a target cell washing function, therefore sorting and washing are completed simultaneously, and high-quality continuous cell sorting can be realized.

The invention relates to a water groove, in particular to a circulating water groove capable of simulating the riverway sediment environment. A sediment test system is included. The circulating watergroove further comprises a circulating water system provided with a water collecting box and a water returning box; the sediment test system is provided with a plurality of culturing boxes distributedin an array shape; sediment test grooves are installed between the multiple culturing boxes, and are designed to be capable of simulating the sediment environment of a river and the like; the culturing boxes are independently arranged, and can be taken out in batches, so that sediment states at different time points are detected; a water groove outflow plate is additionally arranged between the water collecting box and the water returning box; a power adjusting system is installed on the water returning box, and is provided with a control panel; an outflow plate sleeve plate for an outflow plate inner plate to penetrate through and be inserted in is arranged on the water groove outflow plate, and the outflow plate sleeve plate and the outflow plate inner plate are both provided with outflow holes; and the alignment degree of the outflow holes is adjusted, and in cooperation with control of the power adjusting system and the control panel, the water depth and the flow speed can both beadjusted.

The invention relates to the technical field of bioreactors in medical instruments, and in particular relates to a method and a device for regulating a tower plate type perfusion bioreactor. The method for regulating the tower plate type perfusion bioreactor comprises the following steps of: (1), regulating a regulating valve on each layer of tower plate; (2), cultivating cells under same fluid inlet structure parameters; (3), determining a tower plate layer number N with an optimum cultivation effect; (4), computing the flowing speed M of a fluid on the surface of an N-th layer of tower plate; (5), computing structure parameters A(i) of a fluid inlet between adjacent layers of tower plates; (6), regulating the regulating valve on each layer of tower plate; and (7), continuing cultivating the cells on the surface of each layer of regulated tower plate. According to the method and the device, the structure parameters of an inflow port in each layer of tower plate in the perfusion bioreactor can be regulated, so that the fluid shear stress between the adjacent layers of tower plates can be regulated according to a geometric structure, an optimization way is provided for distribution of the fluid shear stresses in each layer of tower plate, and the fluid shear stresses of all layers of tower plates can be optimized.

The invention discloses an exhaled air collection system and method. The exhaled air collection system comprises an air collection front end, an exhaled air collector, a carbon dioxide sensor unit, a speed-adjustable air pump, a three-way electromagnetic valve, an input / output unit and a main control unit; the exhaled air collector is used for collecting exhaled air collected by the air collection front end; the carbon dioxide sensor unit is used for testing the concentration of carbon dioxide in exhaled air; the speed-adjustable air pump can adjust the flow speed to control collection of expired air; the main control unit is used for setting a carbon dioxide threshold value according to the breathing rule of a subject and controlling the opening and closing of the three-way electromagnetic valve according to the carbon dioxide concentration tested in real time, so that expired air meeting the requirement of the carbon dioxide threshold value enters the expired air collector; and the air collecting flow of the speed-adjustable air pump can be set according to the input age and / or weight and / or other signs of the subject; and the exhaled air collection system is suitable for people of different ages and different physiques, the air collecting efficiency is improved, and an automatic air collecting method is truly feasible clinically.

The invention discloses a controllable scouring system for cleaning heating surfaces of a boiler and a method, particularly a method used for feeding a soot blowing medium (sand grains carried by flowing gas) into a hearth through sandblast openings in different positions to scour and clean the heating surfaces of the boiler. The method is characterized in that a plurality of sets of the sandblast openings are formed in the positions, behind a main combustion area and in front of the heating surfaces which have high probabilities of slag bonding and contamination, on the wall of the boiler, the sandblast openings are kept away from the high-temperature combustion area, the soot blowing medium with controllable flow rate and sand grain content is sprayed into the hearth, the sand grains are not fused and flow in the whole hearth to scour slag and soot on the heating surfaces of the boiler at a certain speed and angle. By virtue of the scouring and abrading functions of the sand grains on slag and soot on the heating surfaces of the boiler, slag and soot on the heating surfaces are abraded, crushed and separated, and the sand grains with favorable liquidity flow through all the heating surfaces along with flue gas, so that all the heating surfaces can be immediately and effectively scoured and cleaned without dead angles.

A sewage treatment device provided with a magnetically strengthened MBR (membrane bioreactor) comprises a cylindrical casing provided with an upward opening, static magnets, magnetic coil props, magnetic coils, a cylindrical MBR membrane assembly, a scavenging conduit, an aeration pump and a suction pump, wherein an accommodating cavity is formed in the cylindrical casing; the static magnets, themagnetic coil props, the magnetic coils, the cylindrical MBR membrane assembly and the scavenging conduit are arranged in the accommodating cavity; a ring-shaped clamp groove which is concave downwards is formed in the bottom of the accommodating cavity; at least two magnetic coil props are arranged and uniformly distributed on the ring-shaped clamp groove; the magnetic coils are clamped in bayonets of the magnetic coil props. The sewage treatment device has the advantages as follows: 1, by means of the magnetization effect of a magnetic field, a water molecule structure is changed, water molecular viscosity of sewage is reduced, water molecule activity is improved, difficulty of water molecules passing the MBR membrane is reduced, and membrane pollution is reduced; 2, with the adoption ofthe static magnets and the magnetic coils which can be increased or decreased, strength and direction of magnetic action on the sewage in the device are adjusted, and meanwhile, the magnetic coils can be taken as magnetic conductive rings, so that magnetic force loss is reduced and the magnetic field with uniform magnetic force is manufactured.

The invention discloses a cooling-and-heating-type air conditioner and a control method thereof. The cooling-and-heating-type air conditioner comprises a double-cylinder compressor, a reversing component, an outdoor heat exchanger and an indoor heat exchanger component, wherein the double-cylinder compressor comprises a first air cylinder and a second air cylinder, and the volume ratio of the first air cylinder to the second air cylinder ranges from 1 to 20; the reversing component comprises exhaust valve ports, a first outdoor connection valve port, a second outdoor connection valve port, a first indoor connection valve port, a second indoor connection valve port, a first air suction valve port and a second air suction valve port; the outdoor heat exchanger comprises one gathering port and two diversion ports; two ends of the first indoor heat exchange part of the indoor heat exchanger component are separately connected with the first indoor connection valve port and one of the diversion ports; and two ends of the second heat exchange part of the indoor heat exchanger component are separately connected with the second indoor connection valve port and the other diversion port. By adopting the cooling-and-heating-type air conditioner disclosed by the invention, the energy efficiency level of the cooling-and-heating-type air conditioner can be optimized, and the energy-saving effect is good.

The invention discloses a single cooling type air conditioner and a control method. The single cooling type air conditioner comprises a double-cylinder compressor, an outdoor heat exchanger assembly and an indoor heat exchanger assembly, wherein the double-cylinder compressor comprises a shell, a first cylinder and a second cylinder; the value range of the volume ratio of the first cylinder to the second cylinder is 1 to 20; a first end of a first outdoor heat exchange part and a first end of a second outdoor heat exchange part of the outdoor heat exchanger assembly are connected with an exhaust hole; the two ends of a first indoor heat exchange part of the indoor heat exchanger assembly are respectively connected with a first air suction hole and a second end of the first outdoor heat exchange part; the two ends of a second indoor heat exchange part are respectively connected with a second air suction hole and a second end of the second outdoor heat exchange part; and a throttling element is in series connection between the first indoor heat exchange part and the first outdoor heat exchange part and between the second indoor heat exchange part and the second outdoor heat exchange part. According to the single cooling type air conditioner, the energy efficiency level is high, and the energy saving effect is good.