50results about How to "Self-cleaning ability" patented technology

The invention relates to a clean-type hot-treatment system for collecting and exhausting oil fume, which is characterized by comprising an oil fume inlet pipe (1), a temperature cooler (2) with heat exchange, an oil fume purifier (3), an exhaust fan (4) and a controller (5); the air outlet of the oil fume inlet pipe (1) is connected with the air inlet of the temperature cooler (2) with heat exchange; the air outlet of the temperature cooler (2) with heat exchange is connected with the air inlet of the oil fume purifier (3), and the air outlet of the oil fume purifier (3) is connected with the air inlet of the exhaust fan (4); the signal output end of the controller (5) is connected with the control signal input ends of both the oil fume purifier(3) and the exhaust fan (4); the signal input end of the controller (5) is connected with the signal output end of a temperature detector which is connected in the oil fume purifier (3). The heat of the oil fume is utilized by the invention, which is beneficial to save energy. The system of the invention has the advantages of wide application range, high working efficiency, high efficiency of dust collection and saving energy, which is especially applicable to the collection of oil fume particles that are smaller in particle diameter and lighter in weight.

The invention discloses a horizontal four-axis blender, and relates to a blender for high-sticky materials, or cement or other light materials which runs along a horizontal or basically horizontal axis. The invention provides a horizontal four-axis blender with the advantages of high blending efficiency, lower energy consumption, and broader applicable scope, in which materials can flow more smoothly. The horizontal four-axis blender is provided with a body, a left blending system, and a right blending system; the left blending system is provided with a left outer blending mechanism, and a left inner stirring mechanism which are horizontally arranged; the left inner blending mechanism is internally arranged in the left outer blending mechanism, and is axial with the left outer blending mechanism; the right blending system is provided with a right outer blending mechanism, and a right inner stirring mechanism which are horizontally arranged; the right inner blending mechanism is internally arranged in the right outer blending mechanism, and is axial with the right outer blending mechanism; and the left outer blending mechanism and the right outer blending mechanism are crossly arranged along different axial directions, with different rotating directions and consistent rotating speeds.

The invention discloses a system for collecting, storing and recycling roof rainwater and a mounting method thereof. The system comprises a rainwater harvesting device, a vertical pipe rotational flow filtering device, a rainwater collecting device and a full-automatic water taking device. The rainwater harvesting device is arranged on a roof, and the vertical pipe rotational flow filtering device, the rainwater collecting device and the full-automatic water taking device are arranged on the earth surface. The mounting method comprises the following steps that (a) the mounting position is chosen; (b) the vertical pipe rotational flow filtering device is mounted; (c) the rainwater collecting device is mounted; (d) the full-automatic water taking device is mounted; (e) the rainwater harvesting device is mounted; and (f) the system for collecting, storing and recycling the roof rainwater is debugged. According to the system for collecting, storing and recycling the roof rainwater, rainwater early-stage flow abandoning and filtering are integrated, cost is low, the occupied space is small, mounting and maintenance are convenient, pipeline blocking is avoided, and the system can be used for a long period and is free of running managing and maintenance cost; and the roof rainwater can be filtered, collected, stored and used, and run off pollution of the rainwater can be effectively controlled, so that the environment is improved.

The invention provides a systematic shallow water artificial lake ecological restoration method. The method comprises the following steps: 1) shallow water artificial lake sediment treatment and disposal; 2) underwater forest construction; 3) bank slope ecological restoration; 4) lake inlet plant bar construction; 5) reoxygenation aeration; and 6) biomanipulation. The method can effectively the external non-point source pollution of the artificial lake, improve the self-purification capacity of water, recover the biological diversity, enhance the functional stability of an ecological system and improve the ecological landscape effect of a lake area, and also can avoid the influence on the external environment and reduce the engineering cost.

The invention discloses a high energy electronic ignition system for a high pressure gas well, which is suitable for igniting an open flow spout in the petrochemical field, especially the open flow field of the gas well (oil well). The high energy electronic ignition system for the high pressure gas well comprises an input power supply and an open flow device, wherein the input power supply is connected with a host machine of an igniter, the host machine of the igniter is connected with an ignition rod by a flame resistant cable, and the ignition rod is fixed above the open flow device by an ignition rod bracket. The high energy electronic ignition system for the high pressure gas well can solve the problem of various ignition modes that ignited fire is easy to be extinguished by spouted water; and the high energy electronic ignition system has the advantages of high reliability, no potential safety hazard and accurate and efficient ignition performance, and the operation of ignition can still be successfully carried out under the adverse environment in the premise that the gas concentration reaches the lower limit of inflammation concentration.

The invention discloses a multifunctional obstetrical and gynecological LEEP knife. A multifunctional electrical cutter head is connected with an integrated host through a connecting pipeline. The multifunctional electrical cutter head is formed by an electrode, a flushing-attracting head, an electrode telescoping control switch, a LED lamp, a camera and a knife handle, which can achieve the functions such as cutting, electrocoagulation, flushing, imbibitions, smoking, illuminating and shooting. The integrated host is composed of a control system, a high frequency generation system, a negativepressure attraction system and a flushing system; the whole set of device is integrated in a movable cabinet, which can realize quick arrangement, transfer and expansion. The connecting pipeline comprises a signal control line, a vacuum suction pipe and a flushing liquid pipeline, and the three pipelines are installed in a casing pipe. The invention has the advantages of compact structure and rich functions, and mainly solves the problems of the single function of the existing LEEP knife, the difficulty of the operation in a small space, and the requirement of the surgical accessory equipment, and is particularly suitable for the emergency operation when the manpower is insufficient.

A spontaneous-heating and anti-static garment fabric is formed by interweaving warp and weft. The warp is prepared from the following raw materials in parts by weight: 5-8 parts of graphene oxide, 20-25 parts of modal fibers, 6-8 parts of lonicera tangutica fibers, 6-8 parts of ramie fibers, 5-8 parts of phosphorous permanent flame-retardant polyester fibers, 6-8 parts of cushaw stem fibers, 1-2 parts of copper fibers and 4-6 parts of nano-alumina; the weft is prepared from the following raw materials in parts by weight: 3-5 parts of magnetic fibers, 2-3 parts of tourmaline, 4-5 parts of polyborosiloxane, 1-2 parts of aluminum hydroxide, 15-20 parts of carbon fibers, 12-16 parts of dogbane leaf fibers, 1-2 parts of copper fibers and 18-22 parts of lysimachia alfredii hance fibers. The fabric contains graphene oxide and tourmaline which have certain spontaneous heating capacity; the fabric also has anti-static performance, thereby preventing electrostatic sparks during friction; meanwhile, the fabric has good breathability and flame retardancy, can be directly contacted with skin, is comfortable to wear and cannot cause damage to skin.

The best way at present for AB glue super-small glue volume high precision dispensing consists of two screw rod valves, however domestic screw rod valve technologies are not mature, and how to replace becomes a problem. The invention provides a volume metering type AB glue sliding vane valve, and is used for switching glue replenishment and glue discharge.

The invention relates to an oil sludge drying treatment system which comprises a drying device, a cyclone separation device, a micro-powder gas-solid separation device, a gas-water separation condensing device, a tail gas adsorption device and a vacuum pump system. The invention also provides an oil sludge drying treatment process using the oil sludge drying treatment system. According to the oilsludge drying treatment system, the drying device is used for heating the oil sludge and separating moisture in the oil sludge, the cyclone separation device is used for separating solids in steam generated by heating the oil sludge, the micro-powder gas-solid separation device is used for carrying out secondary separation on the solids in the steam, the gas-water separation and condensation device is used for spraying tail gas to carry out adsorption and cooling, and the tail gas adsorption device is used for carrying out secondary adsorption. The system and the process are efficient, safe and capable of treating a large amount of oil sludge in a centralized manner so that the economy, safety and efficiency of oil sludge treatment are improved.

The invention provides a rural area domestic sewage ecological treatment method which includes the steps: (1) collecting domestic sewage and performing centralized regulation and pretreatment; (2) treating nutrient substances; (3) treating submerged plants; (4) treating a clear water ecological system. The treated sewage reaches surface water IV-class and even III-class standards and then is discharged into nearby rivers and lakes, and dystrophication impact load is effectively reduced. A traditional sewage treatment technology is combined with a water ecological system repair technology, andthe domestic sewage is discharged into the rivers and lakes after deep treatment to protect surface water environments. The invention further provides a corresponding treatment system which is simpleto implement, low in cost and good in effect, excessive pipe network projects and lands are omitted, the system can be automatically maintained and operated after proper adjustment and improvement after one-time input, and manual management cost is reduced.

The invention discloses a switching valve for volume metering-type glue dispensing. The switching valve is mainly characterized in that three overlapped ceramic valve pieces and an elastic body form a two-position three-way valve rubber valve; the elastic body is compressed to generate elastic force applied to the overlapped ceramic valve pieces, so that the contact surfaces between the ceramic valve pieces are planar sealing surfaces; the middle valve piece can stay at two positions under the action of linear power, wherein when the middle valve piece is at the position shown in the figure, the switching valve is in a glue discharging sate; when the middle valve piece is at the other position, the switching valve is in a glue supplementing sate. The switching valve is simple in structure, and convenient to maintain and clean, and has the advantages that a glue flowing path is through, so that the cleaning frequency is lower; the valve pieces are made of a ceramic material meeting the application requirement of filler-contained glue; when two groups of the switching valves are used together, double-glue dispensing is realized.

The invention discloses a button valve, and relates to the field of bathroom products. The valve comprises a valve body. The upper of the valve body is provided with a slide rail component and a locking sleeve for locking the slide rail component. The top of the slide rail component is provided with a hand wheel. A telescopic adjustment mechanism is provided in the slide rail component. The lowerend of the telescopic adjusting mechanism is sleeved with a water opening component and a water closing component. The water opening component and the water closing component are hollow and used for placing a pressure reducing component. The pressure reducing component is arranged on the telescopic adjusting mechanism. A water outlet is arranged on the side wall of the lower part of the valve body. A water inlet is arranged on the bottom of the valve body. The water outlet is communicated with the water inlet, and the connection is controlled by the water opening component and the water closing component arranged on the lower part of the valve body. The opening and closing of a water passage is controlled by pressing down the hand wheel, and the working stroke of the water opening component and the water closing component is adjusted by rotating the hand wheel to change the opening size of the water passage, thereby realizing flow regulation. The valve solves the problem that existingpush-type valve cores are prone to be blocked, and at the same time the valve increases the flow adjustment function.

The invention discloses a buffering device for controlling the movement speed of an actuator cylinder. The reliability of a locking device mechanism can be improved. The buffering device is achieved through the following technical scheme that an upper locking cavity is communicated with a damping pipe, and an intercepting ring groove is formed in the circumference of a sliding section of the damping pipe; when a piston rod extends downwards, hydraulic oil enters a blind hole cavity of the piston rod along the damping pipe, after the blind hole cavity is filled with the hydraulic oil, the hydraulic oil slowly flows upwards into the upper locking cavity along the intercepting ring groove in the damping pipe, the hydraulic pressure of the upper locking cavity is slowly increased, and the piston rod is pushed to move under the action of the hydraulic pressure; when the piston rod retracts, pressure of the unlocking cavity extrudes the piston rod, the piston rod extrudes the hydraulic oil in the upper locking cavity, the pressure of the upper locking cavity is increased, the hydraulic oil slowly flows into the blind hole cavity of the piston rod from the upper locking cavity along an intercepting annular groove of the damping pipe, the hydraulic oil in the unlocking cavity is reduced, and the piston rod slowly slides along the damping pipe; and liquid flow generates damping force through a gap between the inner wall of a blind hole and the damping pipe, the damping force controls the movement speed of the piston rod, and buffering of the actuator cylinder is achieved.

The invention relates to a method for purifying water systems of mountain landscape lakes. The method includes measures of 1), leading mountain water sources to settling and filtering devices via pipelines, settling impurities, filtering sandy soil and then draining the mountain water sources into the mountain landscape lakes; 2), arranging front pools and rear pools, respectively connecting the front pools and the rear pools with municipal blow-down pipelines, communicating the mountain landscape lakes with the rear pools and connecting the rear pools with the municipal blow-down pipelines by water level adjusting pipes; 3), growing a circle of water retention plants on a peripheral mountain slope of each mountain landscape lake, and arranging a circle of passages around each mountain landscape lake on a lakeside wetland of the mountain landscape lake; 4), releasing algae eating insects in lake surface regions of the mountain landscape lakes, growing submerged plants in lakebeds, releasing benthic organisms and constructing 'algae eating insect-submerged plant-benthic organism' coexistence ecology. Main fillers for roadbeds include cobblestone and sand, and water-permeable geotextile is arranged under the roadbeds. The method has the advantage that the water systems of the mountain landscape lakes can be purified by the aid of the method and have flood discharging capacity.

A bactericidal disinfectant solution for Miscanthus and its preparation method. The disinfectant solution is made of the following raw materials in parts by weight: 1-2 parts of gallic acid, 0.1-0.2 parts of L-1,2-dehydro-α-cyperene, and 0.1-0.2 parts of calamus 0.1-0.2 parts of alkenediol, 0.4-0.6 parts of hyoscyamine, 0.4-0.6 parts of phosphatidic acid ethanolamine, 1-2 parts of Bletilla striata dihydrophenanthrenopyranol, 0.5-1.2 parts of methyl corydalis, 10 parts of violet water -15 parts, 0.2-0.5 parts of eucalyptol, 14-20 parts of modified plant extract, 260-300 parts of deionized water. The disinfectant of the present invention has the function of sterilization and disinfection, can kill 100% of the bacteria in pampas grass, and the disinfectant has a certain self-cleaning ability, the disinfectant after use can be reused after standing, and the disinfectant can be used repeatedly for 5-6 Second, the utilization rate is high, the viscosity of the disinfectant is low, it is not easy to stick to Miscanthus, and it can improve the anti-corrosion and flame-retardant properties of Miscanthus, greatly improving the service life of Miscanthus brooms.

The invention belongs to the field of decorative materials and in particular relates to a multifunctional composite decorative material. According to the technical scheme, the composite decorative material comprises four layers which are sequentially a non-woven layer, a PVC (Polyvinyl Chloride) paste resin layer, a rolling material layer and an ultra-thin carbon nanotube coating. The four-layer structure is creatively used, and the invention provides a wall space composite decorative material with the advantages of being attractive in visual appearance, convenient to print, safe, non-toxic, high in strength, scratch-resistant, washable, aging-resistant, fireproof, waterproof, mildew-proof, crack-proof, convenient in construction and excellent in decorative effect.

The invention relates to three-dimensional flannel with a self-cleaning function, which belongs to the field of textile fabrics. The three-dimensional flannel comprises a base fabric (1), and is characterized in that the surface of the base fabric (1) is provided with a plurality of down blocks (2) and channels (3); the channels (3) are distributed at the periphery of the down blocks (2) in a staggered mode; the width of each channel (3) is 0.1 to 1cm; and titanium dioxide particles (4) are fixed on the surfaces of the down blocks (2) in a protruded mode. The three-dimensional flannel formed by colorful down blocks and channels is high in stereoscopic impression and has soft and comfortable handfeel.

The invention provides a cleaning device for sealing machine sealing heads and belongs to the technical field of battery production equipment. The technical problems that people are prone to be scalded when an existing sealing machine is cleaned manually, and the like are solved. The cleaning device for the sealing machine sealing heads comprises a bracket and a drive mechanism. The bracket is provided with a liquid injection head and a cleaning head, and the cleaning head is wrapped with a wiping layer for absorbing liquid. The liquid injection head injects a solvent for dissolving residual glue on the wiping layer. The drive mechanism enables the cleaning head to stretch between the upper sealing head and the lower sealing head and move along the inner surface of the upper sealing head or the inner surface of the lower sealing head by driving the bracket. By means of the cleaning device for the sealing machine sealing heads, a sealing machine can have self-cleaning capacity, and thecleaning device can clean the upper sealing head and the lower sealing head just by making the sealing machine be subjected to regular machine halt through a control program.

The invention relates to an ecological artificial channel with a variable water-crossing section. The ecological artificial channel comprises a channel body, a bottom slope and a channel bank slope and is characterized in that channel function division guide walls are arranged on the two sides of the channel body, a bottom slope bag is placed on the bottom slope, a water charging opening and a dewatering opening are formed in the bottom slope bag, and ecological landscape partitions are arranged on the channel bank slope.

The invention relates to a colorful flexible roof tile and a preparation method thereof. The tile is of a layered structure, and comprises a modified TPO (thermoplastic polyolefin) layer, a functional membrane layer, a high and low temperature resistant and high-adhesive-strength self-adhesive rubber asphalt layer and an isolating membrane layer from top to bottom. The preparation method includes: preparing the modified TPO layer, preparing the high temperature resistant self-adhesive asphalt layer, and performing extrusion forming by using a double-roll extrusion forming mode for coating an isolating membrane via double forming rolls, instantly cooling with cooling water after calendaring and compositing and finally cutting into the tile via a shape cutting machine. On the basis of retaining strong weatherability, high and low temperature resistance and outstanding flexibility, adhesion resistance, friction resistance and anti-dripping performance of the tile are improved, the modified TPO layer is enabled to have self-cleaning capability, and abrasion resistance and flame retardance are improved. Therefore, the roof tile has the advantages of strong weatherability, self-cleaning performance, high and low temperature resistance, rich color, good flexibility, high firmness in adhesion, wide adaptive slope range and recyclability, and is a practical, efficient and environment-friendly building material.

The invention relates to a self-cleaning vertical yarn knitted fabric, belonging to the field of textiles. The vertical yarn knitted fabric comprises a fabric body (1), wherein vertical yarns (2) are arranged on the outer surface of the fabric body (1) and are colored knitting yarns with length being 0.1-5cm; one ends of the vertical yarns (2) are fixed in the fabric body (1) and the other ends of the vertical yarns sag naturally; the vertical yarns (2) are uniformly distributed; and nano-level titanium dioxide nanoparticles (3) are fixed on the surface of the fabric body (1) in a protruding manner. The fabric has the following beneficial effects: the colored knitting yarns on the vertical yarn knitted fabric swing in the wind, thus enhancing the third dimension and mobility of the fabric; and the titanium dioxide nanoparticles arranged on the surface of the fabric body in a protruding manner can increase the contact angles of water drops or oil drops on the fabric, thus ensuring that the water drops or oil drops can tumble on the fabric and not enter the fabric so that the lyophobic and oleophobic effects are achieved, meanwhile the dirt on the fabric is taken away, and thus the surface has the self-cleaning capability.

The invention relates to an ecological weir dam and a river water ecological restoration method. The invention aims to provide an ecological weir dam and a river water ecological restoration method. According to the technical scheme, the ecological weir dam is characterized by comprising a filter unit, an aeration unit and a wetland unit which are sequentially arranged from upstream to downstream,wherein the heights of the filter unit, the aeration unit and the wetland unit are gradually reduced. The method is suitable for the technical field of ecological management.

The invention discloses a displacement type regional hot water heat accumulator, which comprises a heat accumulator body, a floating coil heat exchanger and a heat exchange box, wherein the heat accumulator body comprises a sewage discharge port, a steam inlet, a hot water outlet and a heat insulating layer; the floating coil heat exchanger of the displacement type regional hot water heat accumulator is placed in the heat exchange box and is connected with a fixed plate through bolt connection; and the fixed plate is fixedly arranged on the inner wall of the heat exchange box. Steam enters the regional hot water heat accumulator through a steam inlet and is subjected to heat exchange with cold water in the heat exchange box through the floating coil heat exchanger; and displaced hot water is input into the heat accumulator body to heat the hot water in the heat accumulator body. Since heat exchange is performed in the regional hot water heat accumulator, the heat loss is reduced, meanwhile, the problem that a part of floor is required to be occupied by the heat exchanger is also avoided, and the displacement type regional hot water heat accumulator has excellent economic benefit.

The invention discloses a self-cleaning protective cover, which belongs to the technical field of semiconductors, comprising: the self-cleaning protective cover is spliced ​​by a first cover part and at least one second cover part, the first cover part and each second cover The components are spliced ​​to form a through hole, and the circumferential ring of the through hole is provided with a nozzle for spraying fluid; the beneficial effect of the above technology is that by adding a nozzle for spraying fluid around the through hole, not only the bottom cover has the ability of self-cleaning, but also During the grinding process, the mist of the abrasive liquid entering the bottom cover is cleaned in real time, which reduces the deposition and crystallization of the abrasive liquid on the protective cover, and the fluid ejected through the nozzle forms an air curtain around the through hole of the bottom cover to prevent the abrasive liquid from The flying mist enters the bottom cover to play a certain isolation effect, thus effectively eliminating the problem of crystallization falling off during the grinding operation of the polishing machine, avoiding the phenomenon that the surface of the product being polished is scratched by the crystallization, and improving the quality of the polishing machine. Product yield.

The invention discloses an outdoor fermentor for a high-concentration marine biological bacterial fertilizer. The outdoor fermentor comprises an outdoor water pool body provided with a slope protection, wherein a light-transmitting shed covers the upper part of the water pool body; an air curtain rolling rod is arranged near an opening in the bottom of the light-transmitting shed; a heating pipe is arranged near the bottom of the water pool body, and one end of the heating pipe is connected with a heating device; the tail end of the heating pipe is connected with a tail gas pipe passing through the light-transmitting shed; a motor is arranged near the opening in the bottom of the light-transmitting shed; the motor is connected with a propeller arranged in the water pool body; the bottom of the water pool body is provided with a sand head inflation device. The interior of the light-transmitting shed is heated by hot air of the heating device through the heating pipe near the bottom of the water pool body. The motor drives the propeller to stir, and boiling water sprayed by a hot water pipe can be used for cleaning and removing coenobium and floating foams on the surface of the water pool body. The outdoor fermentor for the high-concentration marine biological bacterial fertilizer has the advantages of being novel in structure and simple and convenient to produce, having certain self-cleaning capability, being capable of automatically controlling continuous production, and being large in fermentation scale.

The invention relates to the technical field of ecological ponds and discloses a deepwater ecological pond which comprises a pond body; the pond body comprises a base layer, an impervious layer arranged on the base layer and a protective layer arranged on the impervious layer; the pond body comprises a deepwater area and a shallow water area; the vertical height from the bottom of the deepwater area to the upper end of the shallow water area is greater than 2.5 m; the impervious layer of the deepwater area comprises a sodium bentonite geosynthetic clay liner; the impervious layer of the shallow water area comprises an impervious clay layer; a permeation adjusting device is arranged at the bottom of the deepwater area and comprises a concrete cofferdam, a metal cylinder and a floating body;the impervious layer on the inner side of the concrete cofferdam is an impervious clay layer; the metal cylinder is fixed on the concrete cofferdam; and a hole is formed in the top of the metal cylinder. The deepwater ecological pond can be adapted to the high water level impervious demand, also can ensure a proper leakage rate in the low water level state, is adapted to the low water level impervious demand, does not affect bidirectional adjustment of surface water and underground water and enables the pond body to have the self cleaning capacity.

The invention relates to the technical field of reservoir self-purification, and discloses a reservoir with self-purification capacity. The invention discloses a reservoir with self-purification capability. The reservoir with the self-purification capability comprises a reservoir body, a sludge stirring device, a conveying pipeline, a suction pump, a sludge layer, a tree planting layer, a soil layer and a sprinkling irrigation system, the sludge stirring device is fixedly installed at the top of the reservoir body, the conveying pipeline is fixedly installed on the right side of the sludge stirring device, the suction pump is fixedly installed at the bottom of the conveying pipeline, and the sludge layer is contained in the reservoir body. According to the reservoir with the self-purification capability, the tree planting layer is arranged on the periphery of the reservoir body, so that water and soil loss around the reservoir body can be effectively prevented, the sludge in the reservoir body is pumped out, smashed and irrigated to a tree planting layer, so that the water quality can be well improved, organic matters contained in the sludge can be used as nutrients for tree growth, the growth of plants is promoted, and the resistance to ecology around the reservoir is greatly enhanced.

The invention relates to the field of kitchen waste disposers and vibration devices, in particular to an environment-friendly kitchen waste disposer with self-cleaning capacity and a vibration device. The environment-friendly kitchen waste processor with the self-cleaning capacity comprises a shell, a shaft sleeve, a grinding mechanism and a vibration device, wherein a grinding space is formed in the shell; the grinding mechanism is arranged in the grinding space and comprises a grinding frame and a grinding disc; the vibration device comprises a speed change assembly, a vibration assembly and a differential assembly; the vibration assembly comprises a vibration block and a rotating disc; the vibration block is fixedly connected to the grinding frame; the upper surface of the rotating disc is a concave-convex surface, and when the rotating disc rotates, the concave-convex surface drives the vibration block to move up and down; the differential assembly is configured to transfer two rotational outputs to the rotating disc. The grinding frame is driven by the vibration device to vibrate, the kitchen garbage is separated in a vibrating mode and is prevented before being adhered, so that the self-cleaning capacity is achieved.