75results about How to "Filter thoroughly" patented technology

The present invention provides an adaptive filtering method, device, fault detection method, electronic device and medium, including performing fast Fourier transform on a voltage time domain signal to obtain a voltage frequency domain signal, selecting a frequency point within a first preset sequence number range and a frequency point within a second preset sequence number range, and setting the values ​​of other frequency points to 0, performing inverse fast Fourier transform on the processed voltage frequency domain signal to obtain an estimated signal of the voltage power frequency signal; based on a Wiener filter, using the estimated signal of the voltage power frequency signal, filtering the collected current time domain signal to filter out the power frequency signal contained therein. In this way, the adverse effects of direct current and high-order harmonic signals in the voltage time domain signal on filtering are eliminated, so that the current power frequency signal can be filtered out more thoroughly, so as to more accurately identify the current component signal located in the rated power frequency sideband from the current spectrum, thereby improving the reliability of detecting the rotor broken bar fault of the asynchronous induction motor.

The utility model discloses a double-membrane treatment device for reuse of reclaimed water, which comprises a treatment box, a support frame is arranged on the outer wall of the treatment box, a box cover is arranged at the upper end of the treatment box, a filter component is arranged in the treatment box, the filter component consists of a mounting frame, a filter frame and double filter membranes, and the mounting frame is arranged on the mounting frame. The installation frame is fixedly connected to the inner wall of the treatment box, a guide groove and a standby groove are formed in the installation frame, the guide groove and the standby groove are the same in structure, a filter frame is inserted into the guide groove in a sliding mode, and double filter membranes are arranged on the inner side wall of the filter frame. According to the reclaimed water filtering device, reclaimed water can be filtered for multiple times, the reclaimed water is filtered more thoroughly, by means of the unique structural design of the filtering assembly, when the filtering effect is poor due to the fact that the double filtering membranes are blocked, the standby double filtering membranes can be rapidly replaced, the double filtering membranes can be replaced in the filtering process, and the working efficiency can be effectively improved.

The invention relates to the technical field of circuit board production, and discloses a circuit board production chemical treatment liquid circulation treatment device which comprises a supporting base and a fixing cylinder, the fixing cylinder is fixedly connected into the supporting base, the top of the fixing cylinder is fixedly connected with a driving base, and the bottom of the fixing cylinder fixedly communicates with a conical discharging hopper. A filter screen cylinder is rotationally connected into the fixed cylinder, and the top of the filter screen cylinder fixedly communicates with an inlet pipe; through cooperation of two modes of high-speed rotation and up-down reciprocating vibration, the chemical treatment liquid can be filtered in a vibrating mode again, solid particles with different particle sizes and densities can be more efficiently separated from the liquid through the centrifugal effect of rotation and disturbance caused by vibration, a better separation effect is achieved, large particles can be rapidly deposited through rotation, and the separation efficiency is improved. The vibration can prevent small particles from blocking the filter screen cylinder, and the combination of the two effectively keeps the permeability of the filter screen cylinder, reduces the occurrence of blocking conditions, and ensures continuous filtration.

The utility model relates to the technical field of industrial coating equipment, and discloses a pipeline initial end dust removal device based on industrial coating equipment, which comprises a pipeline body, a dust removal mechanism is arranged in the pipeline body, and the dust removal mechanism comprises a connecting plate, a positioning cylinder, a positioning rod, a dustproof net and a mounting plate. One side of the connecting plate is fixedly connected with one end of a positioning cylinder, the inner wall of the positioning cylinder is in extrusion contact with the outer wall of a positioning rod, one end of the positioning rod is fixedly connected with one side of a dustproof net, the other side of the dustproof net is fixedly connected with one end of a mounting plate, and one side of the mounting plate is in extrusion contact with a limiting plate. The dustproof net can be better disassembled and assembled, the problems that in actual use, the dustproof net can be blocked after being used for a long time, and an operator cannot disassemble the dustproof net for cleaning are solved, the working difficulty of the operator is lowered, and the situation that industrial coating equipment is prone to being damaged is avoided.

The present invention discloses a swirl filtration type ballast water filtration device and method, which relates to the technical field of ballast water filtration, including a support frame, a swirl cylinder fixedly mounted on the support frame, and a water inlet pipe fixedly connected to the side of the swirl cylinder; a swirl part, used to drive the water in the water inlet pipe to rotate in the swirl cylinder, so that the water in the swirl cylinder forms a swirl; a filter part, used to separate the particulate impurities in the water after the swirl, and precipitate and collect the particulate impurities. The advantages are: the present invention adopts a rotating water-carrying method to change the original overflow drainage method into a rotating drainage method, which can not only improve the drainage efficiency and reduce energy loss, but also backwash the filter screen during the drainage process and provide a certain degree of vibration, thereby improving the filtration efficiency, and in the process of rotating water-carrying, it can also perform higher speed centrifugal separation again, further improving the filtration efficiency of ballast water, so that the ballast water is filtered more thoroughly.

The invention discloses a machine tool cuttings filtering treatment device and method, and relates to the technical field of filtering, the machine tool cuttings filtering treatment device comprises a barrel and a cover body fixedly mounted on the upper part of the barrel, and further comprises a liquid inlet pipe and a liquid outlet pipe which are fixedly mounted on the side edge of the barrel; a first filtering assembly and a second filtering assembly are installed in the cylinder body, the first filtering assembly is used for conducting first-step filtering and removing large impurities in cuttings, and the first filtering assembly comprises a baffle fixedly installed in the cylinder body; and a filter cartridge is fixedly mounted on the baffle plate. The device has the advantages that the filter cartridge is cleaned by adopting a movable local backwashing mode, the filtering operation does not need to be stopped, the device has the advantage of improving the filtering efficiency, meanwhile, the cleaning effect is better, in addition, in the backwashing moving process, the telescopic ring is prevented from being attached to the filter cartridge, and the cleaning effect is better. And the situation that the cuttings enter the barrel again and the concentration of the cuttings in the barrel is too large is effectively avoided, and the filtering efficiency is further improved.

The utility model discloses a filter element filter with a filter element supporting structure, which comprises a pipe collecting wheel, a feeding head, a filter main body, a filter element and a reflux pump, a supporting plate is arranged at the bottom of the filter main body, a supporting rod is arranged below the supporting plate, the filter element is arranged in the filter main body, a flow guide hole pipe is arranged in the middle of an inner cavity of the filter element, and the flow guide hole pipe is connected with the reflux pump. A flow guide hole pipe is arranged in the filter body, a filter layer is arranged on the outer layer of the flow guide hole pipe, a reflux pump is arranged on one side of the filter body through a hoop frame, a detachable feeding head is arranged at the top of the filter body, a pipe collecting wheel is arranged on the inclined upper portion of the feeding head through a wheel frame, and a supporting plate controlled by a screw is arranged at the position, located at the bottom end of a filter element, in the filter body. According to the utility model, one side of the filter main body is provided with the backwashing water inlet and the drain outlet, the filter element can be directly subjected to backwashing through the backwashing water inlet and the drain outlet, the other side of the filter main body is provided with the reflux pump, and the reflux pump is arranged between the filter main body and the feeding head through the reflux pipe.

The invention provides an automatic cleaning device for an oil cylinder sleeve of a bending machine, and relates to the technical field of oil cylinder cleaning devices.The automatic cleaning device is characterized in that a settling conical cover is welded to the middle of the interior of a cleaning barrel, the top end of the settling conical cover is of a vertical circular ring structure, and a suction conveying wheel is rotationally installed in a vertical circular ring; the whole suction conveying wheel is jointly composed of a wheel frame shaped like a Chinese character'mi ', a circle of impeller and a rotating pipe, one circle of impeller is arranged in an inclined twisting mode and welded to the bottom of the wheel frame shaped like the Chinese character'mi', the rotating pipe arranged downwards is welded to the center of the wheel frame shaped like the Chinese character'mi ', and a supporting ring is rotationally installed at the top end of the rotating pipe. The diameter of the suction conveying wheel is larger than the rotating surrounding coverage area of the three U-shaped brushing frames, and the suction conveying wheel is located on the bottom side of the guide cylinder sleeve, can suck and guide cleaning water on the inner side and the outer side of the guide cylinder sleeve downwards when rotating, and sucks and collects brushed impurities downwards accordingly. And the cleaning effect on the guide cylinder sleeve can be indirectly guaranteed.

The invention provides a missible oil type pesticide graded filtering device which comprises a pair of settling tanks, the tops of the settling tanks are connected with liquid inlet pipes, a connecting channel is fixedly connected between the settling tanks, and partition plates capable of being movably inserted into the settling tanks are installed in the connecting channel. The bottom of the settling tank is provided with a discharging pipe, the bottoms of the pair of settling tanks are fixedly connected with a pair of collecting boxes, the discharging pipe extends into the corresponding collecting box, and the extending pipe opening is sleeved and rotationally connected with an internal filter screen cylinder. The device adopts a form of a pair of settling tanks and a pair of collecting boxes, so that the other settling tank and the other collecting box can perform a graded filtering process while one tank body performs settling, the efficiency is high, settled matters can be further centrifugally filtered and collected, and the yield is increased.

The utility model relates to a yoghurt filter, which belongs to the field of food processing and comprises a filter component and a fermentation component, the filter component comprises a collecting cup, a pressure device and a filter cup, the collecting cup is sleeved outside the filter cup, the diameter of the upper edge of the collecting cup is the same as that of the upper edge of the filter cup, and the collecting cup is higher than the filter cup. The pressure device comprises an upper cover, a pressing plate and a spring for connecting the upper cover and the pressing plate, the upper cover is clamped with the upper edge of the collecting cup, the pressing plate and the spring extend into the filtering cup, a plurality of filtering holes are formed in the bottom of the filtering cup, the fermentation assembly comprises a fermentation cup and a fermentation cover, and a sealed space is formed when the fermentation cover is buckled on the fermentation cup. The operation of manually filtering whey in yoghourt is effectively reduced, the fermentation amount of the yoghourt corresponds to the filtering amount accurately, the structure is simple, disassembly and assembly are convenient, and filtering is thorough.

The invention discloses a fruit and vegetable wall breaking and filter pressing all-in-one machine which comprises a base, a fruit and vegetable container is arranged on the base, a crushing cavity is formed in the fruit and vegetable container, a main shaft is arranged in the crushing cavity, a motor is arranged at one end of the main shaft, N movable ring pieces are connected to the main shaft in a sliding mode, and a first compression spring is arranged between every two adjacent movable ring pieces; each movable ring piece is provided with two oppositely-arranged knife rests, the knife rests are provided with crushing knives, the crushing knives are in a fan shape, the included angle between the two side faces of each crushing knife is 180 / N degrees, the cross section of the effective crushing space of the crushing cavity is in a circular ring shape, and the cross section is composed of N sets of oppositely-arranged structural sectors, the two crushing cutters on each movable ring piece cover a group of structural sectors, and filter holes are distributed in the crushing cutters; an ejector pin is slidably connected to the fruit and vegetable container, one end of the ejector pin faces the movable ring piece, a pressing part is arranged at the other end of the ejector pin, and a second compression spring sleeving the ejector pin is arranged outside the fruit and vegetable container. The all-in-one machine has the advantages of being small, portable and convenient to use and clean.

This utility model discloses a tailings treatment solidifying agent spraying device, comprising a frame and a storage tank, wherein the frame is fixedly connected to the storage tank; a connecting rod connected to the frame and communicating with the storage tank; a fixed rod at the end of the connecting rod, which is rotatably connected to a plurality of fan-shaped plates with inclined surfaces; a housing connected to the end of the connecting rod, wherein the peripheral wall of the housing is provided with a first through hole and a second through hole; a plurality of filter elements with flow channels are provided on the outer wall of the housing, wherein the inner wall of the filter element is provided with an inlet corresponding to the first through hole and an outlet corresponding to the second through hole; a filter plate is provided between the inner wall and the outer wall of the filter element, wherein the filter plate is located between the inlet and the outlet, and the internal area of ​​the filter plate is provided with a plurality of filter holes to filter large particulate impurities in the solidifying agent flowing into the filter element, and the structure is simple.

The utility model discloses a glass fiber multi-layer filtering device, which relates to the technical field of glass fiber processing, and comprises a filtering box, a plurality of groups of first mounting brackets and second mounting brackets are fixedly mounted in the filtering box, and the first mounting brackets and the second mounting brackets are alternately arranged; a first filter screen is fixedly mounted in the middle of the first mounting bracket, a second filter screen is fixedly mounted in the middle of the second mounting bracket, vibration motors are arranged on the left side of the lower end of the first mounting bracket and the right side of the lower end of the first filter screen, and impurity boxes are fixedly connected to the left end and the right end of the filter box; according to the device, the multiple filter screens are matched with the vibration motor, so that glass fibers are filtered more thoroughly, the filtering effect is good, the first filter screen and the second filter screen are obliquely arranged, impurities can be guided into the collecting box in time in cooperation with the vibration motor, and filter holes of the filter screens are prevented from being blocked by the impurities.

The invention discloses a quartz vibrating beam accelerometer noise suppression circuit, which adopts a chopping-AGC (Automatic Gain Control) closed-loop oscillation circuit to realize stable driving of a quartz vibrating beam, and comprises a chopping amplifier, an AGC automatic control gain module and a subsequent amplifier, after an electric signal generated when the vibrating beam vibrates is amplified by the chopping amplifier and low-frequency noise is filtered out, the AGC automatic control gain module outputs the amplified electric signal to the subsequent amplifier; and the noise-reduced signal is output, the amplitude of the noise-reduced signal is stabilized by the AGC automatic control gain module, then the noise-reduced signal is amplified and subjected to phase compensation by the subsequent amplifier, and then the noise-reduced signal is fed back to the quartz vibrating beam accelerometer header to form stable closed-loop driving. According to the method, the noise signal and the input signal are modulated to different frequency bands through the chopping modulation technology, separation of the noise signal and the input signal is achieved through the filtering means, and the zero-bias stability and the noise performance of the QVBA system can be effectively improved through the method.

The utility model discloses a water sample treatment device for environment detection, which comprises a machine body, a treatment box is arranged at the top end of the machine body, a water inlet is arranged at the top end of the treatment box, a motor is arranged on one side of the water inlet, a transmission rod is arranged at the output end of the motor, and crushing fan blades are sleeved on the surface of the transmission rod in equal rows. A check block is arranged at the bottom end of the smashing fan blade, a screening plate is arranged at the bottom end of the check block, an adsorption plate is arranged at the bottom end of the screening plate, and a filtering plate is arranged at the bottom end of the adsorption plate. According to the water sample treatment device for environment detection, in the daily use process, according to actual requirements, a test tube can be fixed through a disinfection plate, then a filtered water sample is put into a water pipe by starting an electric valve, then the water sample is disinfected by starting a disinfection lamp, light of the disinfection lamp is reflected through a reflection prism, and the water sample is disinfected through the disinfection lamp. And the disinfection is more comprehensive, so that the safety of the device is greatly improved.

The utility model discloses a kind of crystallizing tank devices of automation precision temperature control, it is related to crystallizing tank technical field, specifically a kind of crystallizing tank devices of automation precision temperature control, including crystallizing tank main body, further include filter component;By setting first collecting hopper, cylinder, second collecting hopper and spiral conveying rod and the structure such as etc., the efficient filtration to impurity in crystallization is realized.Crystalline is conveyed to right side under the driving of spiral conveying rod, falls down impurity through filter screen in the process, while fixed rod on spiral conveying rod further drives crystalline to turn over, improve filtering effect.In addition, cylinder can slide left and right under the driving of second motor, further enhance the turning effect of crystal, make impurity more fully contact with filter screen, to realize more thorough filtration.Compared with prior art, the filtering efficiency of the utility model is significantly improved, can effectively remove impurity in crystallization, improve the purity of product, satisfy the demand of high-purity product production.

The utility model discloses a waste liquid collecting device with a disinfection function, which relates to the field of animal husbandry and veterinary medicine, and comprises a reaction tank main body, a filter assembly and a liquid storage tank, a water inlet is arranged above the reaction tank main body, and the filter assembly is arranged inside the reaction tank main body; the filter assembly comprises a first filter screen, a second filter screen, a third filter screen and a fixed limiting block, a liquid storage tank is arranged on one side of the upper portion of the reaction tank body, a supporting base is arranged above the liquid storage tank, a water pump is connected to the upper portion of the supporting base in a clamped mode, and a drainage pipe is connected to one side of the water pump. One end of the drainage pipe is connected with a pipeline connector. According to the waste liquid collecting device with the disinfection function, by arranging the filtering assembly and the rotating spray head, the purpose of treating waste liquid is achieved, precipitation is prevented from being generated when animal husbandry veterinarians treat the waste liquid subsequently, meanwhile, the waste liquid is disinfected in a multi-azimuth and multi-angle mode, and people can use the waste liquid conveniently in the later period.

The present invention discloses a non-powered cyclone sedimentation tank, which belongs to the technical field of water purification equipment, and includes: a clean water tank, a sewage pipe arranged at the bottom of the clean water tank, a cyclone device and an outlet channel arranged in the clean water tank, an inlet pipe arranged at one side of the clean water tank, and a reagent adding device connected to the cyclone device and the inlet pipe respectively; the outlet channel is arranged above the cyclone device and connected to the inner wall of the clean water tank, and an outlet pipe is arranged at the connection between the outlet channel and the clean water tank; the cyclone device includes: a support frame arranged at the bottom of the clean water tank and an inlet coil arranged on the support frame; the inlet coil is connected to the inlet pipe, and the inlet coil is connected to the reagent adding device. In this scheme, the inlet coil and the reagent adding device are arranged to replace the stirring device and the mixing device, thereby saving costs and reducing the loss of electric energy, and the sewage can be filtered multiple times through the suspended layer and the inclined tube, thereby ensuring that the sewage filtering process is thorough.

The utility model discloses a swimming pool water quality filtering and purifying device with double suction on the bottom surface, which comprises a swimming pool and a filtering machine room, the bottom of the swimming pool is provided with a bottom water inlet and a bottom water outlet, and the left side of the swimming pool close to the top is provided with a water surface water inlet. The structure device can well solve the water circulation filtering problem of the swimming pool, when pool water enters a filtering machine room, the water quality purification structure of the swimming pool adopts a bottom surface double-suction method, and water at the pool bottom can enter the machine room through a water inlet at the pool bottom to be filtered; and the water inlet on the pool surface can also pump water on the pool surface into the machine room for filtering, so that garbage at the pool bottom and leaves, hair, floating foam, dust and the like floating on the water surface can be collected and cleaned, the water in the swimming pool can be filtered more thoroughly, and the trouble of manually fishing the floating leaf garbage and the like is avoided.

The utility model discloses a movable concrete pump pipe waste water filter tank which solves the technical problems that waste water is not filtered thoroughly, fine sand in sewage can still block a pipeline or a drainage ditch, and filtered concrete stones are inconvenient to recycle and use. The filter tank comprises a movable box body, a first-stage filter screen and a second-stage filter screen are arranged at one end in the box body at intervals, a gauze screen or a dense screen is arranged between the second-stage filter screen and the inner wall of the box body, a filter screen is arranged between the first-stage filter screen and the second-stage filter screen, and the multistage filter layers enable the wastewater of the pump pipe to be filtered more thoroughly, so that blockage of a subsequent drainage pipe is avoided; a movable support is arranged at one end, close to the inclined surface, of the box body, a lifting mechanism is arranged at one end, away from the inclined surface, of the box body, and a lifting point and a lifting ring are further arranged on the box body, so that the filter tank can be moved and can be conveniently recycled between each floor and the ground; the movable support and the lifting mechanism are telescopically matched to cling the inclined surface to the ground, so that filter residues are convenient to clean, and manpower is saved.

The utility model relates to the technical field of sewage treatment, and discloses a sewage treatment grillage machine which comprises a shell, a rotating rod is rotatably connected to the top end of the front side of the inner wall of the shell, a coarse impurity screening net is fixedly connected to the outer wall of the rotating rod, and a medium impurity screening net is arranged in the middle of the front side of the inner wall of the shell. A fine impurity screening net is arranged at the bottom end of the right side of the inner wall of the shell, a spring is fixedly connected to the rear side of the bottom end of the outer wall of the fine impurity screening net, a discharging assembly is arranged on the right side of the outer wall of the shell, and a driving mechanism is arranged on the front side of the outer wall of the shell and comprises a motor mounting frame and a displacement assembly. According to the sewage treatment device disclosed by the utility model, the coarse impurity screening net, the medium impurity screening net and the fine impurity screening net are matched for use, so that sewage can be filtered in a layered manner, and the water pump and the drainage pipe are matched for use, so that the treated sewage can be discharged, and liquid resources can be conveniently recycled.

The utility model discloses a beer processing wastewater treatment device which comprises a base and a centrifugal pump installed on the base, the input end of the centrifugal pump is connected with a pipe body a, the pipe body a is provided with a first-stage filtering mechanism, the output end of the centrifugal pump is connected with a pipe body b, the pipe body b is provided with a valve body, and the valve body is provided with a second-stage filtering mechanism. The side wall of the pipe body b is connected with a pipe body c and a pipe body d through a plurality of three-way electric control valves. Wastewater enters from the pipe body a and passes through the filter plate to be filtered for the first time, the filter plate is obliquely arranged, it is guaranteed that water flow washes filter residues upwards along the filter plate in an inclined mode, the filter residues are prevented from being gathered on the surface of the filter plate, the filter holes are gradually reduced, graded filtering is achieved, the filtering efficiency is improved, and then the wastewater enters the pipe body e through the pipe body b and the pipe body d. Meanwhile, by closing the valve body a, introducing clear water from the pipe body e and discharging the clear water from the pipe body c, the backwashing of the filter can be realized, and the maintenance is simple and convenient.

The utility model discloses a filter device for insecticidal spray production, and relates to the technical field of insecticide production, the filter device comprises a suction pump, the bottom of the suction pump is fixedly connected with a material storage assembly, and the output end of the suction pump is fixedly connected with a liquid discharge pipe in an inserted mode. A liquid inlet pipe is fixedly inserted into the input end of the suction pump, the liquid inlet pipe is fixedly inserted into the top of the material storage assembly, and a feeding pipe is fixedly inserted into the top of the material storage assembly. According to the utility model, the stock solution prepared from the insecticide enters the storage component through the feeding pipe for precipitation and adsorption, after entering, a worker can clearly know the liquid level of the raw material, and the storage component can generate vortex inside to enable the stock solution to actively contact with the adsorption part, so that the filtration is more thorough; when discharging is needed, the suction pump generates suction force, the stock solution enters the liquid inlet pipe through the filtering assembly and then is discharged from the liquid discharging pipe, and the stock solution is filtered again when passing through the filtering assembly so that it can be guaranteed that impurities of the stock solution can be completely treated.

The invention relates to the technical field of wastewater integrated treatment, in particular to a fluorine-containing wastewater integrated treatment device which comprises a treatment box, a first box cover is arranged at the top end of the treatment box, and a water inlet valve penetrating through the first box cover is fixedly connected to the top end of the first box cover; and a rotating motor fixedly connected to the middle of the top end of the first box cover is arranged on one side of the water inlet valve, and a threaded block is fixedly connected to the bottom end of an output shaft of the rotating motor. The device is provided with a threaded block, a stirring shaft, a threaded groove, blades, a rough filtration assembly, a round hole, a fixing bolt, a fixing nut, a fixing frame, a connecting plate, a filter screen, a fixing ring, a rubber ring, a first valve, a fine filtration assembly, a storage box, a filter box, a through hole, a square frame, a top cover, a sealing groove, a sealing ring, a mounting plate, a penetrating hole, a positioning bolt, a positioning nut, a fine filtration plate, a sliding groove and a sliding block. By means of the device, filtration can be finer, sewage filtration is more thorough, and sludge cleaning can be more convenient.

The utility model relates to a silica sol filtering device which comprises a bottom plate, a fixing frame is fixedly connected to the upper surface of the bottom plate, a filtering box is installed on the right side face of the fixing frame, a collecting box is installed on the right side face of the filtering box, a through groove is formed in the right side face of the filtering box, and a filtering plate is installed in the through groove. A cover plate is arranged on the upper surface of the filter box, a first through hole is formed in the upper surface of the cover plate, a hydraulic rod is fixedly connected to the upper surface of the cover plate, a pressurizing plate is fixedly connected to the output end of the hydraulic rod, a rotating motor is fixedly connected to the bottom surface of the pressurizing plate, and a rotating shaft is fixedly connected to the output end of the rotating motor. According to the device, a cover plate can be driven to ascend and descend through an electric push rod, manual disassembly and assembly are not needed, the working efficiency of workers is improved, silica sol materials can be compressed through cooperation of a hydraulic rod and a pressurizing plate, and meanwhile the silica sol materials are heated through a heating rod, so that the silica sol materials are prevented from being condensed.

The utility model provides a test system and device for a vehicle-mounted refrigerator, and relates to the technical field of testing, and the test system comprises a power module, a communication module, a control module and a switch module. The power module is connected with the battery; the communication module is connected with the power supply module and the vehicle-mounted refrigerator; the control module is connected with the power module and the communication module; the switch module is connected with the power supply module and the control module, when the switch module works in a first conduction state, the control module controls the vehicle-mounted refrigerator to be switched to a refrigeration test mode through the communication module, and when the switch module works in a second conduction state, the control module controls the vehicle-mounted refrigerator to be switched to a heating test mode through the communication module. According to the test system, the test mode of the vehicle-mounted refrigerator can be correspondingly and automatically changed by changing the conduction state of the switch module, and the switching flexibility is high. And the professional demand is relatively low, the operation is simple, the cost is relatively low, and batch testing of the vehicle-mounted refrigerator is facilitated.

The utility model discloses a waste lithium battery cracking waste gas purification system for a purification chamber, which belongs to the technical field of lithium batteries and comprises supporting legs, a processing tank is fixedly arranged at the upper ends of the supporting legs, an exhaust pipe is fixedly arranged at the upper end of the processing tank, a purification box is arranged on one side of the processing tank, and an L-shaped pipe is arranged in the purification box. A first through hole is formed in the upper end of the L-shaped pipe, a second through hole is formed in the lower end of the exhaust pipe, an intercepting pipe is arranged in the L-shaped pipe, a liquid box is arranged in the purification box, a connecting pipe is fixedly arranged on one side of the liquid box, and a second bolt is arranged on one side of the L-shaped pipe. Therefore, small impurity interception can be better carried out on the waste gas, and the device is relatively convenient to use.

The invention relates to the technical field of permanent magnet synchronous motor control, and discloses a PMSM position sensorless control system with an improved SMO. An SMO module is improved; a second-order low-pass filter module; a position / rotating speed extraction module; a PI controller module; and an inverter module. According to the invention, a novel approach rate is designed, the approach gain can be dynamically adjusted according to system errors, and adaptive balance of acceleration approach in case of large errors and chattering suppression in case of small errors is realized; a saturation function easy to realize is adopted as a control switching function, buffeting during system control is reduced, and the control precision is improved; an integral sliding mode surface is adopted to replace a traditional sliding mode surface, the influence of stator resistance is eliminated, and the convergence speed and parameter disturbance resistance of a control system are improved; and a second-order low-pass filter is adopted, so that useless high-frequency interference signals can be attenuated more quickly, high-frequency noise can be filtered more thoroughly, and the estimation precision is improved.

The utility model discloses a filtering device for electroplating liquid, which comprises a box body, a switch is fixedly mounted on the outer side of the box body, walking wheels are symmetrically connected to the bottom of the box body, electric push rods are symmetrically mounted at the bottom of the box body, a motor is fixedly mounted on the outer side of the box body, and an output shaft of the motor transversely penetrates through the box body and then is fixedly connected with a gear. A flow guide block is fixedly connected to the bottom of the inner side of the box body, connecting bases are symmetrically connected to the inner wall of the box body, a plurality of filter screen plates are arranged in the box body, and large impurities in electroplating liquid are preliminarily filtered and blocked through a filter material arranged in a tank body; and a gear is meshed with an annular rack to drive a net groove to rotate at a high speed to conduct centrifugal filtering operation on the electroplating liquid, the electroplating liquid is filtered for three times through a plurality of filtering net plates, and therefore the electroplating liquid is filtered more thoroughly, and the filtering effect of the device is further improved.

The present invention relates to the technical field of water purification, and discloses a circulating purification treatment device for flowing water, including a mounting base, a drainage pipe is fixedly mounted on the upper side of the mounting base, the tail of the drainage pipe is fixed to the mounting base and is in a blocked state, a first discharge pipe, a second discharge pipe and a filtrate pipe are respectively fixedly mounted on the tail end of the mounting base, a drainage port is provided on the inner wall of the drainage pipe, and the drainage pipe is connected to the first discharge pipe through the drainage port. By arranging a rotatable filter disc in the drainage pipe, since a vortex-shaped baffle is arranged at the end of the filter disc, when the vortex-shaped baffle rotates and is pushed by the water flow in the drainage pipe, the impurities intercepted by the filter disc can be pushed from the intermittently conducted overflow window to the central pipe to discharge the impurities, so that the filter disc has an automatic cleaning function, can circulate and filter sewage, achieve the effect of not being easy to be blocked, reduce maintenance costs, and be more economical and reliable to use.