2838results about How to "Wash thoroughly" patented technology

The invention provides a cleaning agent and a cleaning method of a GGH heat exchange component applying the same. The cleaning agent comprises alkaline cleaning solution and acidic cleaning solution, wherein the alkaline cleaning solution contains 1.6 weight percent to 11.0 weight percent (wt, same below) of alkali, 0.7 to 2.4 of penetrating agent, 1.2 to 3.5 of scale dissolver, 0.3 to 1.2 of surfactant, 0.2 to 1.3 of remover b and the balance of water; and the acidic cleaning solution contains 2.6 to 5.5 of strong acid, 0.7 to 2.4 of penetrating agent, 0.3 to 1.2 of latent solvent, 0.2 to 0.6 of inhibitor, 0.2 to 1.3 of remover a, and the balance of water. The washing process comprises an alkaline cleaning step, an acid cleaning step and a high-pressure water flushing step between the alkaline cleaning step and the acid cleaning step. The cleaning process and the cleaning agent of the GHH heat exchange component have the advantages of quick and thorough cleaning, low cost, environmental protection, and the like.

The invention discloses an energy-conserving textile fabric washing device. The washing device comprises a case. A cleaning room, a drying room and a disinfection room are formed in an inner cavity of the case in sequence from left to right. A fixed support on the left side face of the case is fixedly connected with a feeding roller through a fixed shaft. A fixed support on the right side face of the case is fixedly connected with a discharge roller through a fixed shaft. A feeding opening is formed in the upper portion of the left side face of the case. A discharge opening is formed in the upper portion of the right side face of the case. The upper surface of the case is fixedly connected with a water storage tank, and the bottom of the left side face of the water storage tank is fixedly connected with a water pipe fixedly connected with a booster pump. The energy-conserving textile fabric washing device has the advantages of thoroughly cleaning and disinfecting cloth, effectively recycling cleaning fluid to avoid water body pollution and effectively utilizing heat in the drying room. The problems are solved that existing textile fabric wastes energy and cannot be cleaned thoroughly.

The invention belongs to the technical field of chemical products, and particularly relates to a cleaning agent. The cleaning agent comprises components as follows: 25%-40% of a stabilizer, 3%-10% of a chelating agent, 2%-10% of a penetrating agent, 1%-4% of a surfactant, 1%-5% of a dispersing agent and the balance of water. Compared with the prior art, the cleaning agent can thoroughly clean up foreign matters such as solid powder, organic matters, greasy dirt, fingerprints, various greases, abrasives, dust, dirt and the like on optical glass, plate glass, plexiglass, a mobile phone lens, a camera lens, glass lenses, sapphire glass, a ceramic wafer and a quartz optical product once, doesn't corrode surfaces of the optical glass, the plate glass, the plexiglass, the mobile phone lens, the camera lens, the glass lenses, the sapphire glass, the ceramic wafer, the quartz optical product and the like, and is not left over the surfaces.

The invention provides a glass-cleaning and drying device suitable for cleaning and drying coated glass. The glass-cleaning and drying device comprises a stand, a conveying mechanism, a tray brush device, a brush device, a water-absorbing component, a drying device and a heat drying device. The conveying mechanism comprises a driving motor and a plurality of conveying rollers arranged in a line, wherein the driving motor drives the conveying rollers to convey coated glass; the tray brush device comprises a lifting mechanism, a plurality of tray brushes and a tray brush driving mechanism; the lifting driver of the lifting mechanism drives the tray brushes to move up and down relative to the coated glass; the tray brush driving mechanism drives the tray brushes to rotate; the clamped transmission roller group of the brush device is arranged between the tray brush device and the brush device for conveying the coated glass in a clamping mode and expelling moisture on the coated glass; the water-absorbing component comprises a water-absorbing roller group which comprises water-absorbing rollers with water absorption in vertical two-to-two correspondence; the drying device comprises air knives and a blower; and the air knives respectively face to the upper surface and the lower surface of the coated glass.

The invention relates to wall cleaning equipment, in particular to bathroom wall cleaning equipment, aiming to realize quick, thorough and safe cleaning of walls with no need for people standing on a chair. The bathroom wall cleaning equipment comprises a cart and the like; supporting rods are connected on the top plate of a cart board in a bilateral symmetry manner through bolts, and the top ends of the supporting rods are connected with a base plate through bolts; an up-and-down moving unit is arranged on the top of the base plate, and a cleaning unit is arranged on a moving member of the up-and-down moving unit. The up-and-down moving unit drives the cleaning device to clean walls; the bathroom wall cleaning equipment is further provided with a stirring unit which mixes clean water and detergent uniformly; thus the effect of quick, thorough and safe cleaning of walls is achieved with no need for people standing on the chair.

The electronic industrial glass cleaning agent composition belongs to the field of electronic industrial cleaning technology. The cleaning agent consists of sodium metasilicate, sodium hydroxide, sodium carbonate, sodium bicarbonate, Pluronic polyol, CMC, fluoric surfactant, complexing agent, defoaming agent and deionized water. It is used to clean substrate glass and coated conducting glass. During the cleaning, the cleaning agent in 1-5 % is compounded with deionized water in 95-99 % to compound the cleaning liquid for showering or ultrasonic cleaning to eliminate pollutant on glass fastcompletely. It is used to replace strong acid and strong alkali cleaning agent and has no damage to glass surface and no corrosion to ITO film. The cleaning agent has no bad smell, no toxicity and no corrosion, and is safe, reliable, environment friendly and low in cost.

The invention discloses a cleaning device for mechanical parts, comprising a cleaning box, a mesh drum is arranged inside the cleaning box, a cover is arranged on the outer surface of the mesh drum, and rollers provided at both ends of the mesh drum penetrate through the cleaning box And it is movably connected with the bearing seats provided on both sides of the cleaning box, one end of the roller is fixedly connected with a driven wheel, the driven wheel is connected with a driving wheel through a belt drive, and the driving wheel is connected to the driving motor on one side of the cleaning box through a rotating shaft. Fixed connection, the lower side of the mesh drum is provided with a filter screen, a liquid storage cavity is left between the filter screen and the inner wall of the cleaning box, and a pressure sensor is arranged on the inner wall of the cleaning box in the liquid storage cavity. The mechanical parts cleaning device, the parts can be automatically turned over in the mesh drum of the cleaning box, and the local surface can be completely cleaned by the cooperation of the ultrasonic generator and the ultrasonic converter, and the cleaning is thorough, and at the same time, the labor intensity is low, the work efficiency is high, and the cost is saved. Energy, both hygienic and environmentally friendly.

A highly efficient inactivating detergent for ferrous sulfide is disclosed, which is characterized by that it comprises 0.1-10% of chlorine dioxide, 0.1-10% of surfactant, 0.1-5% of citric acid, 0.1-5% of EDTA, 0.1-5% of corrosion inhibitor and water. The surfactant is one or more from dodecyl sulphonate, dodecyl benzene sulfonate, condensate of alkyl phenol and epoxyethane and condensate of aliphatic alcohol and epoxyethane. The corrosion inhibitor is urotropine, dibutyl thiourea or alkyl pyridine. Using the inventive inactivating detergent in cleaning petroleum refining apparatus, ferrous can be thoroughly oxygenized, inactivated and sulfated on one aspect, to prevent occurrence of self-ignition accident, oil crust can be totally washed from the apparatus on the other aspect, which makes the invention has characteristics of high efficiency, secure and environmental protective.

The invention discloses an automatic tea making machine. The automatic tea making machine comprises a control system, a tea supply system, a water supply system and a tea making system, wherein the tea supply system comprises a tea canister; the water supply system comprises a first water container; the tea making system comprises a second water container; the first water container is communicated with the second container through a water conveying pipeline; a tea conveying pipeline comprises a transverse weighing pipeline; a weighing device is arranged at the bottom of the weighing pipeline; a pushing device is arranged at one end of the weighing pipeline; tea leaves are conveyed into the second water container by the pushing device; a first liquid level sensor is arranged in the first water container; a water discharging electromagnetic valve is arranged on the water conveying pipeline and controls the opening and closing of the water conveying pipeline; and the control system controls the quantity of water which enters the second water container. The automatic tea making machine is simple in structure and can realize accurate ratio of the tea leaves to the water to the temperature so as to improve the taste and the quality of tea water.

The invention discloses medical instrument cleaning equipment which comprises an outer shell, a spraying device and scrubbing devices. The spraying device comprises a spraying motor and a sprayer set. The tail end of a rotor part of the spraying motor is connected with the sprayer set, high-pressure sprayers are communicated with water outlets of an arc water passing base, and a high-pressure water pipe is further connected with a washing liquid container located above the outer shell. The scrubbing devices are mounted on the two sides of the bottom of an inner cavity of the outer shell respectively. Each scrubbing device comprises a scrubbing motor and a brush rod, wherein the brush rod is coaxially connected with a rotor part of the scrubbing motor. According to the medical instrument cleaning equipment, the arc water passing base is additionally arranged, output water is concentrated, and impact force is high; the scrubbing devices with the scrubbing motors are arranged on the two sides of the bottom of the inner cavity of the outer shell respectively and can be matched with the spraying device, so that the scrubbing effect is achieved while flushing is achieved, and the cleaning work efficiency is further improved.

The invention relates to a method combining coiled tubing with supercritical CO2 for jet-flow sand washing plugging removal. The method uses the supercritical CO2 as flushing fluid to carry out jet-flow sand washing plugging removal for a shaft or an oil casing. When a supercritical CO2 jet-flow is combined with the coiled tubing to carry out supercritical CO2 jet-flow sand washing plugging removal, pressure relief is not needed in the trip process, the coiled tubing can directly work with pressure, and the working procedure and the time are saved. The fluid viscosity of the supercritical CO2 is low, the surface tension of the supercritical CO2 is close to zero, and the diffusion coefficient of the supercritical CO2 is large, so that the supercritical CO2 can easily enter into tiny pores and cracks to dissolve polymer organic matters and other impurities, and the cleaning is more thorough. And, above all, the supercritical CO2 does not have any pollution to a reservoir, the viscosity of crude oil can also be reduced after the supercritical CO2 enters into the reservoir, the permeability of the reservoir is increased, and the yield and the recovery ratio are increased. Thus, the supercritical CO2 is especially suitable for downhole plugging removal working of unconventional oil-gas reservoirs such as low permeability oil-gas reservoirs, pressure-depleted oil-gas reservoirs, coal gas reservoirs, shale gas reservoirs, tight sandstone gas reservoirs, heavy oil reservoirs and the like.

The invention relates to a series of methods for operating a washing machine and the washing machine applying the methods, in particular to combined washing procedures of conventional washing procedures and additional washing procedures as well as the washing machine applying the procedures. The combined washing procedures comprises not only the conventional washing procedures defined by the variety of clothes, but also the additional washing procedures which are the washing intensions of customers or defined by the texture, weight and smudginess of the clothes. The invention also provides the washing machine applying the combined washing procedures. By applying the technical proposal, the invention provides the combined washing procedures that multiple the variety and quantity of the washing procedures on the basis of the conventional washing procedures of an ordinary washing machine and the washing machine applying the combined washing procedures. The customers can freely combine the washing procedures in accordance with washings with various types and qualities, thus improving the washing effect and saving the water and power.

The invention discloses a reaction vessel for a luminescence tester and a cleaning and separating mechanism thereof. The reaction vessel is made of a transparent material and is flat, the opening of the reaction vessel is larger than the bottom of the reaction vessel, the reaction vessel is placed in a cleaning turnplate in the circumferential direction, the flat sides of the reaction vessel are in the circumferential direction, a suction pin and a drawing pin are arranged above the reaction vessel, and magnets used for magnetic separation are placed on the flat sides of the reaction vessel so as to attract magnetic bead particles to one side of the reaction vessel fast and prevent the magnetic bead particles from being sucked away by the suction pin during cleaning; to completely remove impurities, the magnets are placed on the two flat sides of the reaction vessel alternately to enable the magnetic beads to move to the other side from one side of the vessel during cleaning, impurities possibly precipitating under the magnetic beads are released, so that the reliability and repeatability of measurement results are guaranteed, the number of times of cleaning is reduced, and testing speed is increased.

The invention discloses a tableware cleaning line which comprises a top box elevator, an automatic turnover machine, a coarse washing machine, a box body conveyor, a tableware sorting device, tableware conveyor belts, a can turnover device, a cleaning tunnel, a packaging and conveying belt and a tableware assembly device, wherein the discharge end of the top box elevator is close to the feeding end of the automatic turnover machine; an inclined slag remover and a coarse washing machine elevator are arranged in a pond of the coarse washing machine separately; the discharge end of the coarse washing machine elevator is connected with the feeding end of an anti-patterning machine; the out-box end of the automatic turnover machine is provided with the box body conveyor which passes through a box body cleaning room of the cleaning tunnel; the discharge end of the anti-patterning machine is connected with the feeding end of the tableware sorting device; each tableware outlet of the tableware sorting device is correspondingly provided with one tableware conveyor belt separately; and spoons and chopsticks are directly conveyed through the tableware conveyor belts and enter the feeding end of a spoon and chopstick conveyor mesh belt. According to the tableware cleaning line, classifying and cleaning of the tableware are achieved, cleaning is more thorough, and the cleaning efficiency of a table set is greatly improved.

The invention relates to mine washing equipment, in particular to an ore washer. The ore washer comprises a motor, a washing box, a water inlet pipe, a plurality of spray heads, an agitating device, a water outlet pipe, a sewage treatment device and a feeding hopper, wherein the agitating device is mounted in the washing box; the motor is mounted outside the washing box and is connected with the agitating device through a lead; the feeding hopper is mounted above the washing box and is communicated with the washing box; the water inlet pipe transversely extends to the top in the washing box; the plurality of spray heads are uniformly mounted on the water inlet pipe at intervals; one end of the water outlet pipe is communicated with the bottom of the washing box, and the other end of the water outlet pipe is connected with the sewage treatment device; a discharge hole is also formed in the bottom of the washing box. The ore washer has the benefits that the structure is simple, the operation is convenient, the working efficiency is improved, ore is more completely washed at the same time, the sewage discharge is reduced, the resources are saved, and the economic benefit is improved.

The invention discloses a device for cleaning a test tube for food detection. The device comprises a water collecting tank, wherein two limiting rods are vertically and fixedly mounted on the water collecting tank; a forward-reverse rotating motor is fixedly mounted on a top plate; a driving shaft which rotationally penetrates through the top plate is coaxially and fixedly mounted with an output shaft of the forward-reverse rotating motor; a plurality of driven shafts are rotationally arranged on the lower bottom surface of the top plate; limiting sleeves are slidably arranged on the limitingrods in a sleeving manner; a meshed plate is horizontally and fixedly mounted between the limiting sleeves; a plurality of longitudinal sleeves which vertically correspond to the driving shaft or thedriven shafts are arranged on the meshed plate; lead screws are in threaded connection with the interiors of fixing arc-shaped plates in a sleeving manner; a rotating wheel is fixedly mounted at one end of each lead screw; and limiting baffles are fixedly mounted on the limiting rods. The device disclosed by the invention can achieve a rapid cleaning effect on the test tube for food detection; when a soft-bristle brush rotates in the test tube for cleaning, the test tube can perform reciprocating motion relative to the soft-bristle brush up and down, and then can be cleaned more thoroughly; and furthermore, a plurality of test tubes can be cleaned simultaneously, thereby improving the cleaning efficiency.

The invention discloses a clothes washing water recycling device, a water-saving clothes washing control method and a washing method of the clothes washing water recycling device. The clothes washing water recycling device comprises a washing cylinder, a circulation water pipeline, a drainage pipeline and an ultrafiltration membrane assembly. The water inlet end of the circulation water pipeline is communicated with a water outlet of the washing cylinder, and the water outlet end of the circulation water pipeline is communicated with a water inlet of the washing cylinder. The ultrafiltration membrane assembly is provided with a water inlet end, a first water outlet end and a second water outlet end. The ultrafiltration membrane assembly is connected to the circulation water pipeline through the water inlet end and the first water outlet end, and a gas conveying device is connected to the water inlet of the ultrafiltration membrane assembly. The circulation water pipeline is further provided with a liquid conveying device, and the drainage pipeline is communicated with the second water outlet end of the ultrafiltration membrane assembly. When much dirt is retained on an ultrafiltration membrane, gas washing is performed on the ultrafiltration membrane, and then water is used for washing. Compared with the manner that only water washing is used, washing water can be saved, and cleaning is better and more thorough.

The invention relates to a fully-automatic oily sewage filtration-type separator which comprises a tank body, filter material, a water inlet, a water outlet, a cylinder, a pressure plate, an oil collector, a cylinder fixing cover for fixing the cylinder, and a perforated clapboard; a first chamber is formed between the perforated clapboard and the top wall of an inner cavity of the tank body; thewater inlet and the oil collector are arranged at the upper part of the tank body and both communicated with the first chamber; the perforated clapboard is arranged at the upper part of the inner cavity of the tank body and below the water inlet; the cylinder fixing cover is fixed with the lower end of the tank body, and a piston rod of the cylinder passes through the cylinder fixing cover and then extends into the inner cavity of the tank body; a third chamber is formed between the cylinder fixing cover and the pressure plate; the water outlet is arranged at the lower part of the tank body and communicated with the third chamber; a second chamber is formed between the pressure plate and the perforated clapboard, and a filter core is arranged in the second chamber. The invention also relates to a separating system which adopts the fully-automatic oily sewage filtration-type separator. The invention has small occupying area, is unnecessary to filter oily sewage in advance, can not onlyensure high oil-water separation precision, but also carry out automatic backwash on line.

The invention relates to a water based environment-friendly cleaning agent and the preparation method, which is characterized in that the agent comprises natural plant extract, degradable surface active agent, inhibiter and de-ionized water. The preparation method is as follows: (1) preparing materials according to the weight ratio, (2) adding the raw material orderly in series, (3) stirring at even pace and (4) evenly mixing to make the finished cleaning agent ultimately. The preparation method for the water based environment-friendly cleaning agent has the advantages of scientific prescription, simple production technique, strong cleaning ability, short cleaning time, low labor and man-hour, high work efficiency, low causticity to the equipment, good safety and low equipment cost. The water based environment-friendly cleaning agent is degradable liquid and can be biologically degraded into harmless material in nature completely. The waste liquid after be cleaned cab be directly discharged without polluting the environment and reach the sewage discharge standard. The water based environment-friendly cleaning agent is provided with the surface active agent and the inhibiter which can form a rustproof protecting film on the metal surface after cleaning, and ensures that the part after cleaning has an advantage of good rust protection.

The multi-station fully automatic supersonic cleaner includes control cabinet, HF supersonic wave generator, MF supersonic wave generator and LF supersonic wave generator, as well as support, driver unit, hanging unit, workpiece basket, workpiece table on an elevating mechanism, HF supersonic wave cleaning tank, MF supersonic wave cleaning tank and LF supersonic wave cleaning tank with supersonic vibrator, rinsing tank with showering nozzle, frequency-variable dewatering device connected to a frequency-variable motor, hot blast generator and workpiece unloading table. It also includes photoelectronic sensor set on the support. It has the advantages of continuous cleaning steps, thorough cleaning, no environmental pollution, etc.

The invention relates to a wall-mounted air-conditioner indoor machine, which comprises an air outlet, an air intake, an airflow channel, an evaporator, a wind wheel and a motor, wherein the airflow channel is formed between the air outlet and the air intake; the evaporator is arranged on the air channel and is close to the air intake; the wind wheel and the motor are arranged on the airflow channel and are close to the air outlet; the wall-mounted air-conditioner indoor machine further comprises a chassis and an air duct component, wherein the air duct component is detachably connected to the chassis; the chassis serves as a separate component and is provided with a window through which airflow in the airflow channel passes; the evaporator, the motor and wind wheel are arranged on the chassis and are all located on the air intake side of the window; the air duct component is located on the air outlet side of the window; the air duct component leads the airflow, passing through the window, to the air outlet; at least the evaporator and the wind wheel among the evaporator, the motor and the wind wheel are exposed at the window. When the air duct component is removed, the evaporator and the wind wheel are exposed at the window, and the removed air duct component is directly cleaned, meanwhile, the evaporator and the wind wheel are cleaned, the interior of an air-conditioner is cleaned, and the cleaning is more convenient.

The invention discloses a drying and cleaning integrated device of a medical test tube. The device comprises a box body, the box body is of a hollow structure, the inner wall of one side of the box body is rotationally connected with a transversely arranged mounting rod through a first rotating piece, one end, far away from the first rotating piece, of the mounting rod is transversely provided with a rotating rod, and the rotating rod penetrates through the side wall of the box body to be arranged; a plurality of vertically arranged fixing seats are fixedly connected to the side wall of the mounting rod, grooves are formed in the side walls of the two sides of the fixing seats, and the side walls of the grooves are connected with vertically arranged clamping plates through a plurality of springs; and the test tube is vertically arranged between the two clamping plates, a bearing plate is transversely arranged in the box body, moreover, the bearing plate is arranged below the rotating rod, and the side wall of the two sides of the bearing plate are connected with the inner wall of the lower end of the box body through telescopic rods which are vertically arranged. According to the device, the automatic cleaning and drying of the medical test tube can be realized, the workload of a medical staff is reduced, and the cleaning efficiency is improved.

The invention discloses a movable cleaning unit for gynecological nursing. The movable cleaning unit comprises a base plate, a control box, a cleaning-fluid box, a disinfectant box and a drug box are sequentially fixed on the upper surface of the base plate from left to right, an operation panel is fixed to the upper portion of the side face of the cleaning-fluid box, a liquid pump is fixed to the left end of the front side of the upper surface of the base plate, an electromagnetic valve is installed in a liquid outlet of each of the cleaning-fluid box, the disinfectant box and the drug box, the liquid outlets of the cleaning-fluid box, the disinfectant box and the drug box are respectively communicated with liquid inlet ends of a liquid inlet pipe through guide pipes, the liquid outlet end of the liquid inlet pipe is communicated with the liquid inlet of the liquid pump, a heating device heats liquid in the cleaning-fluid box, the disinfectant box and the drug box to a set temperature, and comfort of patients is improved. By the arrangement, flushing fluid can be switched anytime, and fluid treatment for the patient can be completed by one time; the movable cleaning unit is simple in structure, convenient in operation, timesaving and laborsaving, safe and practical, efficient and rapid and complete in cleaning, and working difficulty of obstetricians is alleviated.

The invention relates to a full automatic both side straddle mounted type road guardrail which solves the problems of time consuming, great effort, low efficiency in the prior art during cleaning a road guardrail; the adopted technical proposal is as follows: the structure internally comprises a storage water tank, a box body, a motor power supply mechanism arranged in the box body, a driving motor, an actuating mechanism, a travelling mechanism, a cleaning mechanism, a water level sensing mechanism, and is provided with a self-navigation system matched with the traveling mechanism so as to control the steering of the device. The cleaner is internally provided with a water adsorption roller, a water touch roller and a scrubbing brush roller for completely cleaning the guardrail; the motor power supply mechanism is charged by a solar battery. The cleaner has simpler operation, convenient unloading, low cost, environmental protection, high working efficiency, and complete cleaning.

An apparatus for cleaning a paint roller includes a container having a top with an insertion opening for introducing a paint-carrying surface of the paint roller into the container and a bottom with a discharge opening for discharging paint out of the container. A spray pipe has holes formed therein for directing water toward the paint-carrying surface within the container. The spray pipe rotates and the paint roller is movable vertically, for washing paint off substantially all of the paint-carrying surface and out of the discharge opening.

The invention relates to a peeling-cleaning all-in-one machine for green walnuts, and belongs to the technical field of processing mechanical equipment for agriculture products. The peeling-cleaning all-in-one machine for green walnuts disclosed by the invention comprises a peeling device, an impurity removal and cleaning device, and a drying device, wherein the peeling device comprises a rack, a central main shaft, a peeling rotary drum, a charge port, a concave-plate sieve and a first motor; the impurity removal and cleaning device comprises a water pump, an S-shaped discharge tube, a water tube, a residue collection device, a water collection bucket, a water storage box and a second motor; the drying device comprises a hot-air device and the S-shaped discharge tube. The peeling-cleaning all-in-one machine for green walnuts disclosed by the invention is capable of meeting peeling and cleaning requirements on green walnuts, and ensuring the quality of peeling, thorough in peeling, complete in cleaning, high in automation degree, capable of realizing the cyclic utilization of water resources and primary drying for walnuts, low in cost, stable in running, and wide in market prospect.

The invention discloses a dust screen assembly, an electric acoustic assembly, a housing assembly and an electronic device. The dust screen assembly comprises a magnet which has a first magnetic field, a coil which is located at one side of the magnet and is suitable for generating a second magnetic field, brush heads which are arranged in the coil and are connected with the coil, and a dust screen which is located at the side, far from the magnet, of the coil, wherein the end surface of the brush head goes beyond the end surface of the coil; when the direction of the second magnetic field and the direction of the first magnetic field are opposite, the coil moves towards the dust screen, the brush heads are suitable for making contact with the dust screen; and when the direction of the second magnetic field and the direction of the first magnetic field are identical, the coil moves towards the magnet. According to the dust screen assembly, the dust screen can be cleaned thoroughly, holes in the dust screen are not blocked, the quality of the electronic device is improved, the dust screen is not cleaned manually, and the after-sale expenditure is lowered.

The invention provides an internal descaling and external defrosting novel air conditioner applying ultrasonic oscillators. The internal descaling and external defrosting novel air conditioner comprises an outdoor unit and an indoor unit. The outdoor unit and the indoor unit are connected through a pipeline. The indoor unit comprises the indoor ultrasonic oscillators and an indoor heat exchanger, wherein the indoor ultrasonic oscillators are located around the indoor heat exchanger. The indoor heat exchanger is a shell and tube heat exchanger and comprises fins, U-shaped pipes, an air inlet pipe, process reinforcement tubes, a liquid outlet pipe and bridging elbows. Each U-shaped pipe comprises two free ends extending in the same direction in parallel, and a bent part located between the two free ends, wherein the free ends are inserted in the corresponding fins. Ports of the free ends of every two adjacent U-shaped pipes are connected through the corresponding bridging elbow. The outdoor unit comprises a capillary tube, a compressor, an outdoor heat exchanger, the outdoor ultrasonic oscillators, a four-way valve, air-liquid separators, a filter and a check valve, wherein the outdoor ultrasonic oscillators are located around the outdoor heat exchanger. By means of the internal descaling and external defrosting novel air conditioner, ultrasonic non-stop on-line internal descaling and external defrosting can be achieved, the stable running environment of the air conditioner is ensured, and the service life is prolonged.

The invention provides disk type test tube cleaning equipment. The disk type test tube cleaning equipment comprises a second water inlet pipe, a water outlet pipe of an annular water tank, the annularwater tank, a water spray pipe, a rotary shaft, a driven gear, a driving gear and test tubes, wherein two bearings which are rotatably inlaid in the top end and the tail end of a transmission shaft at the center of the driven gear are correspondingly mounted in bearing mounting holes which are formed in a bearing supporting base and in a cleaning cylinder base plate in a penetrating mode separately, and a sealing ring is inlaid in the bearing mounting hole formed in the cleaning cylinder base plate in the penetrating mode so that cleaning water can be sealed. A rubber fixing ring is fixedly inlaid in the inner wall of each test tube fixing ring, and the test tubes are inserted into the test tube fixing rings and fixedly pressed through friction of the rubber fixing rings in the test tubefixing rings. According to the disk type test tube cleaning equipment, the rotary shaft is arranged, and under the rotation effect of the rotary shaft, bristles which are evenly distributed on brush sleeves in an array mode can wipe and clean the inner walls of the test tubes, and thus residual substances or dirt on the inner walls of the test tubes can be completely cleared away.

A small-sized food chopper for chopping up foodstuffs, includes an outer case including a lower casing removably connected with an upper casing and a button mounted on the upper casing; a blade connection holder installed inside the outer case, the blade connection holder can move axially up and down in the outer case; a plurality of blades installed on the lower end of the blade connection holder; a reset spring sheathed on the blade connection holder which restores the blade connection holder axially up; a mechanism which makes the blade connection holder rotate a predetermined angle circumferential each time the blade connection holder operates axially; the button is configured such that it can slide up and down axially, and the button acts on the upper end of the blade connection holder to make the blade connection holder move axially downwardly.