271results about How to "Improve distribution" patented technology

The present application provides a method for diagnosing and / or evaluating the presence or absence, severity or degree of the improvement of a retinal disease in a subject, which comprises determining and / or evaluating circulatory parameters, retinal function, retina morphology and / or visual relating quality of life (QOL).

The invention relates to a combined truncated cone type gas-liquid redistributor. The combined truncated cone type gas-liquid redistributor comprises a conical wall and a connecting bottom plate. Theconnecting bottom plate is fixedly arranged at the bottom of the conical wall, and is provided with a plurality of strip-shaped folding plates; the strip-shaped folding plates are of inverted-V structures; a plurality of air holes are formed at equal intervals in both sides of each strip-shaped folding plate; a stop plate is fixedly arranged on the lateral side of the strip-shaped folding plate above each air hole, and an angle is formed between each stop plate and the lateral side of the corresponding strip-shaped folding plate; the angles between the stop plates and the lateral sides of thestrip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate. The combined truncated cone type gas-liquid redistributor has the advantages that the strip-shaped folding plates and the stop plates are adopted to achieve a good distribution effect of washing liquid, and accordingly, the area and time of contact between gases and liquid can be increased and prolonged; the included angles between the stop plates and the lateral sides of the strip-shaped folding plates are proportional to the distances from the stop plates to the center of the connecting bottom plate, so that the differences among the flowing speeds of gases from each air hole are small, the gas distribution effect is good, poor gas-liquid distribution in a packing tower is reduced, and the gas-liquid mass transfer efficiency is improved.

The utility model discloses a hydrochloric acid ammonia gas corrosion test case relates to test case technical field, including test case main part, support seat, waste gas treatment tank, support seat top both sides are connected with test case main part and waste gas treatment tank respectively. The utility model discloses a ammonia gas injection pipe and hydrochloric acid injection pipe inject proper amount of ammonia gas and hydrochloric acid gas into test case main part, wherein the hydrochloric acid conduit and ammonia gas exhaust pipe correspondingly connected of ammonia gas injection pipe and hydrochloric acid injection pipe are upside down distribution in test case main part, are favorable to the full mixing of hydrochloric acid gas and the ammonia gas below, form even corrosive gas environment, this can ensure that the corrosion effect that each part in test case receives is more consistent, thereby obtains accurate test result, wherein the test case main part inner wall has been daubed anticorrosive layer coating), can effectively prevent the corrosion of hydrochloric acid and ammonia gas to test case main part inner wall.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

This utility model relates to the field of lighting heat dissipation technology, and discloses a lighting fixture with heat dissipation function. It includes a connecting structure above the lampshade and a lighting structure below. The connecting structure includes a hook, an electrical box, a power module, and an electrical box cover. The lighting structure includes a lens and a light source module. The electrical box cover has an upward-facing bowl shape around its circumference. A gap exists between the electrical box cover and the lampshade. The lampshade has a hollow section in the middle. A through groove, aligned vertically with the hollow section, is located at the center of the light source module and the lens. The hollow section at the top of the lampshade allows heat to dissipate upwards, reducing the heat of the lighting fixture. The space between the bottom of the electrical box cover and the lampshade allows heat to dissipate through the hollow section, providing ample space for heat dissipation. The electrical box cover also acts as an insulation layer, improving heat dissipation. The overall upward-facing bowl shape of the electrical box cover, especially at the bottom, prevents heat accumulation, significantly improving overall heat dissipation.

This invention relates to the field of casting technology, and more particularly to a high-strength drive wheel casting process. The steps include: Step 1, alloy material preparation; Step 2, melting and micro-alloying treatment; Step 3, mold preparation and pouring; Step 4, solidification and cooling staged control; and Step 5, heat treatment process. By optimizing the alloy composition, improving the mold structure, precisely controlling melting and pouring, and adapting the heat treatment process, this invention solves the technical problems of insufficient strength, high defect rate, and poor forming accuracy in existing drive wheels. The invention also improves the structure and adapts the cooling chamber to the process, combining a controlled atmosphere cooling chamber with a staged cooling process. It incorporates partition isolation components, waste heat recovery components, and a temperature control unit, achieving independent partitioned cooling of the casting, precise temperature control, and waste heat reuse. This solves the problems of "airflow interference, uneven cooling, and energy waste" in existing cooling chambers.

This utility model relates to the field of atomization spray technology, specifically an atomization spray precision control device. The device includes an atomizer with a side-hollow structure. A baffle plate is located inside the atomizer, and a transmission groove is formed within the atomizer. A connecting rod is fixedly connected to the top of the baffle plate. The top of the connecting rod extends into the transmission groove and is fixedly connected to a gear. A threaded rod is rotatably connected inside the transmission groove. A sliding block is threadedly connected to the external thread of the threaded rod, and another sliding block is threadedly connected to its external thread. A rack is fixedly connected to the bottom of the sliding block. A limit rail is fixedly connected to the top of the inner wall of the transmission groove. The advantages of this utility model are that it ensures uniform drug particle size, enabling precise deposition in the respiratory tract and lungs, improving drug absorption efficiency, optimizing drug distribution, avoiding excessively high or low local drug concentrations, enhancing therapeutic effects, and reducing side effects. Compared to traditional devices, it significantly improves operational quality and efficiency.

This invention discloses a 440MPa grade steel plate with ultra-low temperature toughness and its preparation method, belonging to the field of steel materials technology. It solves the contradiction between insufficient strength and toughness grades and excessive nickel content in existing low-temperature steels. The composition of the 440MPa grade steel plate with ultra-low temperature toughness, by mass percentage, includes: C: 0.030%–0.085%, Si: 0.18%–0.38%, Mn: 0.95%–1.35%, P: ≤0.010%, S: ≤0.003%, Cr: 0.01%–0.25%, Mo: 0.01%–0.15%, Ni: 3.20%–4.25%, Cu: 0.12%–0.85%, Nb: 0.008%–0.035%, Al: 0.02%–0.036%, Ti: 0.008%–0.022%, with the balance being Fe and other unavoidable impurities. The steel plate of this invention exhibits excellent strength and low-temperature toughness.

The invention discloses an assembly type shear wall bolt connection box with a stress gradient transition function, and belongs to the technical field of assembly type reinforced concrete structure connection. The connecting box comprises a steel box body, an anchoring back plate arranged on the back face of the box body and array type anchoring ribs arranged on the anchoring back plate. The metal outer wall of the connecting box is coated with a buffer layer formed by a high-strength rubber elastomer or epoxy resin mortar, and the thickness of the buffer layer is gradually reduced in the anchoring direction, so that rigidity gradient transition from the steel box to the concrete is achieved. The structure can effectively weaken stress concentration near the end of the anchor bar, delays cracking and crushing of concrete on the edge of the connecting box, remarkably improves ductility and crack resistance of the vertical abutted seam joint of the fabricated shear wall, and better achieves the design goals of strong connection and weak components.

The utility model discloses a VOCs organic waste gas treatment device which comprises a carbon box, clamping seats are fixedly connected to the two sides of the inner side face of the carbon box, activated carbon adsorption plates are clamped in the clamping seats, and a conveying pipe is fixedly connected to the bottom of the inner side face of the carbon box. According to the VOCs organic waste gas treatment device, an activated carbon adsorption plate, a fresh air heat exchanger, a fan and a combustion furnace are arranged, the activated carbon adsorption plate adsorbs organic components in waste gas into micropores of activated carbon for concentration, filtered clean gas reaches the standard and is discharged, and fresh air is heated to a preset value through the fresh air heat exchanger and then enters a carbon box through a second air inlet pipe; organic waste gas subjected to desorption treatment is purged, meanwhile, VOCs organic waste gas is conveyed into a combustion furnace through a gas collecting pipe and a gas collecting hood through a draught fan, the VOCs organic waste gas is decomposed into carbon dioxide and water vapor after being subjected to catalytic combustion, and finally the VOCs organic waste gas is conveyed to a fresh air heat exchanger through a connecting pipe to be discharged after being subjected to heat exchange and cooling and reaching the standard, so that an activated carbon adsorption plate can be recycled; and the use cost is reduced.

The invention relates to a preparation method of peppermint essence, which solves the problems of quick volatilization and poor durability of the traditional peppermint essence by optimizing the combination of essence components and a slow-release carrier by adopting a multi-layer microcapsule slow-release technology and a nanocapsule technology. According to the method, essence components such as menthol, menthone and leaf isovalerate are mixed with at least two layers of microcapsules, the outer layer microcapsules slowly release fragrance, the inner layer microcapsules quickly release fragrance, and it is ensured that the fragrance is kept for a long time in the using process. Meanwhile, the essence is uniformly dispersed in different carrier systems through ultrasonic-assisted emulsification by adopting a nanocapsule technology, so that the stability and dispersity of the essence are improved. In addition, the temperature-responsive and pH-responsive polymer materials are introduced, so that the release rate of the essence can be adjusted according to the external environment, and the adaptability of the essence is further enhanced.

The utility model discloses a double -row blade air intake distributor relates to spray tower waste gas treatment technical field. It includes spray tower, and the bottom of spray tower is equipped with waste gas entrance, and the inside fixed and waste gas entrance corresponding distributor. The distributor contains two rows of symmetrical blades, and the bottom plate and the cover plate fixed in the inside of spray tower, and the blade is fixed between two. The bottom plate, the cover plate are the same fan -shaped structure of shape size, and two ends are the arc shape of adapting with tower inner wall. The blade is "L" character shape and corner arc transition, and there is the shunt in the longitudinal adjacent blade, and the horizontal adjacent blade interval is gradually small. The distributor can even shunt waste gas, promote the utilization rate of filler, reduce local wind pressure, reduce resistance, improve waste gas purification effect.

This invention belongs to the field of copper alloy material design and preparation technology, and discloses a new process for efficiently designing high-performance copper-iron alloys. Based on the 5% Fe content vertical cross-sectional characteristics of the Cu-Fe-Si ternary phase diagram, the Si content is designed in stages (0-4%) to achieve targeted performance optimization. Combined with a three-stage heat treatment process of "homogenization-basic aging-gradient aging", a closed-loop system of "phase diagram design-preparation-detection-optimization" is constructed. Through precise composition control by EPMA and real-time feedback of mechanical properties, the problems of blind composition design and insufficient precipitation of strengthening phases in traditional processes are solved. The resulting alloy has excellent tensile strength, yield strength, and total elongation at break, with synergistic improvement in mechanical and magnetic properties, and a design efficiency improvement of more than 40%, making it suitable for electronic, mechanical and other fields.

The application discloses a liquid metal bearing for an X-ray tube and the X-ray tube, relates to the technical field of X-ray tubes, and solves the technical problems of short service life and poor heat dissipation effect of the bearing. The liquid metal supporting bearing comprises a bearing sleeve, a mandrel, liquid metal and a microporous structure; the bearing sleeve is sleeved outside the mandrel, and a gap is arranged between the bearing sleeve and the mandrel; the liquid metal is filled in the gap; the microporous structure is arranged on the inner surfaces opposite to each other of the bearing sleeve and the mandrel and / or the outer surfaces opposite to each other of the mandrel and the bearing sleeve, the microporous structure is formed by a plurality of micropores arranged in an array, and the microporous structure has a protruding direction consistent with the flowing direction of the liquid metal. The liquid metal distribution is optimized through the micropores and optional microslit structures between the bearing sleeve and the mandrel, the friction coefficient is reduced, the heat dissipation performance is enhanced, and the service life and the heat dissipation effect of the bearing can be remarkably improved.

The utility model discloses an unmanned aerial vehicle lithium battery pack installation structure which comprises a bottom plate, wing frames are fixedly arranged at the four corners of the top of the bottom plate respectively, an installation plate is detachably and fixedly installed above the wing frames, a battery pack is fixedly arranged on the installation plate, the battery pack comprises a containing frame, a battery is arranged in the containing frame, and the battery is arranged in the containing frame. Transverse grooves are formed in the four sides of the top of the mounting plate respectively, connecting blocks are fixedly arranged on the four sides of the bottom of the battery pack respectively, electric push rods are fixedly arranged at the bottoms of the connecting blocks and located in the transverse grooves, inserting grooves are formed in one sides of the transverse grooves, inserting rods are fixedly arranged at the telescopic ends of the electric push rods, and the inserting rods are fixedly connected with the battery pack. The lithium battery pack mounting structure solves the problems that an existing mounting structure is often complex in operation, time-consuming and labor-consuming, a lithium battery pack is inconvenient to replace and maintain, and meanwhile, the existing mounting structure has defects in the aspect of heat dissipation, so that the heat dissipation problem of the lithium battery pack is difficult to effectively solve.

This invention relates to the field of burner technology, specifically a burner for a gas-fired wall-hung boiler, comprising a rear mounting bracket and a venturi tube mounted on its front side. The front side of the venturi tube is connected to the front mounting bracket, and a temporary storage frame is fixed to the front side of the front mounting bracket. A burner head of the venturi tube is mounted above the venturi tube. In this burner, when the rotating rod drives the convex column to rotate, the convex column intermittently applies a downward thrust to the convex block. This causes the convex block to drive the piston assembly to intermittently reciprocate within the gas storage pipe. Therefore, the piston assembly reciprocates to draw gas and air from the main pipe into the gas storage pipe and then discharges the gas and air from the gas storage pipe. This repeated operation allows for thorough pre-mixing of the pre-mixed gas and air, improving the completeness of subsequent combustion, reducing exhaust emissions, and lowering gas consumption, thus achieving excellent energy-saving and gas-saving effects.

The utility model discloses an animal laboratory waste gas filtering device relates to the field of waste gas filtration for animal laboratory, including filter box, the air inlet end fixed mounting of filter box has the air inlet pipe, the exhaust end fixed mounting of filter box has the exhaust pipe, the inside upper and lower slide mounting of one end of filter box close exhaust pipe has the sliding frame, the inside top end board of filter box is equipped with the insertion slot that supplies sliding frame inserts, the inside installation of sliding frame has sterilization mechanism, the top of filter box is installed to the limiting mechanism that sliding frame and sterilization mechanism carry out the location, the inside wall of sliding frame and insertion slot, the inside wall of filter box contact position department installs the sealing ring. The utility model discloses through setting up sterilization mechanism and limiting mechanism, can conveniently distribute or integral replacement to no.

This invention discloses an NC sorting module and its control method, belonging to the field of transportation equipment. It includes a transportation mechanism comprising two sets of supports, with multiple sets of spaced sprockets fixedly connected between the two sets of supports via rollers. A module belt is connected and engaged between the sprockets on the two sets of rollers. A support roller is fixed between the two sets of supports. A multi-group diversion mechanism is also included, used to move goods towards both sides of the transportation mechanism. The NC sorting mechanism includes a mounting panel disposed between the two sets of supports, with multiple sets of contact parts suitable for contacting the module belt and generating friction. This NC sorting module, through multiple sets of contact parts and a targeted size adaptation structure, allows the contact parts to selectively contact the module belt according to the size of the goods, avoiding unnecessary friction and reducing wear.

This application relates to a method for preparing high-purity iron, comprising the following steps: forming an electrode rod from pure iron raw material; subjecting the electrode rod to vacuum arc melting; the vacuum arc melting includes an arc initiation stage, a melting stage, and a feeding stage; the melting current in the arc initiation stage is 1.5 kA~3.0 kA, and the arc stabilization current is 4 A~10 A; the melting current in the melting stage is 2.5 kA~3.5 kA, the melting rate is 2.5 cm / min~5.5 cm / min, and the arc stabilization current is 8 A~20 A; the melting current in the feeding stage is 1.2 kA~3.3 kA, the melting rate is 1 cm / min~4.5 cm / min, and the arc stabilization current is 4 A~11 A. This method can effectively reduce the density and refine the size of inclusions in pure iron, while also making the inclusions dispersed in the material. The high-purity iron prepared by this method has a significantly reduced inclusion density, small inclusion size, and is in a dispersed state, which meets the manufacturing requirements of iron-based supports.

The application provides a chip burning method, a computer device and a computer readable storage medium. The chip burning method comprises the following steps: generating a plurality of different temporary keys; combining the plurality of temporary keys into a key sequence and storing the key sequence in a temporary key file; receiving an encrypted burning file from a second terminal; matching the temporary keys in the key sequence of the encrypted burning file with the temporary keys stored in a local key database one by one; when the temporary keys are successfully matched with the temporary keys in the local key database, downloading a decrypted program file to a burner, the program file is used for burning to a target chip, and then deleting the matched temporary key from the local key database. By generating a plurality of different temporary keys and storing the temporary keys in the local database, the number of burners that can be used at the same time is controlled by matching the temporary keys one by one and deleting the used keys immediately after successful matching, and the total burning quantity can be accurately controlled.

The utility model relates to LED heat dissipation technical field especially relates to a kind of LED radiator, including the equal interval and splicing together of several heat dissipation fins, the surface of heat dissipation fin is equipped with several water inlet holes and several water outlet holes, several water inlet holes and several water outlet holes are respectively equipped with several U-shaped pipes, the water inlet and water outlet of several U-shaped pipes are located in the same horizontal plane, and the water inlet of several U-shaped pipes is respectively connected with the same main water inlet pipe by several branch water inlet pipes, the water outlet of several U-shaped pipes is respectively connected with the same main water outlet pipe by several branch water outlet pipes;The heat dissipation fin of the utility model is spliced together, can be combined according to the heat dissipation area of LED device, and the scope of application is wide, and the uniformity of heat transfer can be also guaranteed, beneficial to heat dissipation, simultaneously, the setting of U-shaped pipe increases the flow path of water flow in heat dissipation fin, can effectively take away the heat on heat dissipation fin, effectively improves heat dissipation efficiency.

This invention discloses a sludge thickening tank for wastewater treatment plant construction, belonging to the field of sludge thickening technology. It includes a thickening tank with a conical sludge hopper at the bottom and a sludge discharge port at the bottom of the hopper. A sludge discharge pipe is located at the lower end of the discharge port. An overflow weir is slidably connected to the inner curved surface of the thickening tank, and a clear water tank is fixedly connected to the lower end of the outer curved surface. A fixed plate is radially fixedly connected to the upper end of the clear water tank, and a stirring assembly is fixedly connected to the middle of the fixed plate. A fixed chamber is fixedly connected to the upper end of the stirring assembly, and a second drive motor is fixedly connected to the upper end of the fixed chamber. An intermediate shaft and a retraction rod are slidably connected to the fixed chamber. This invention achieves advantages such as high-efficiency thickening, intelligent control, and wear resistance through an innovative structure of adjustable overflow weir + intelligent valve + dual-drive stirring, while also considering ease of operation and safe maintenance, making it suitable for modern wastewater treatment needs.

A fiber-reinforced lithium borohydride-based all-solid-state electrolyte for suppressing dendrite formation, its preparation method, and its application are disclosed. The method employs a reverse micelle precipitation method to prepare a precursor solution by dissolving lithium borohydride and lithium iodide in an ether solvent solution. Aluminum oxalate and vapor-grown carbon fibers are then added, followed by dropwise addition to an isopentane solution containing a surfactant. After reverse micelles form, the solution is allowed to settle and react completely, and the solvent is thoroughly removed. The product from the settled reaction is dried and then subjected to partial hydrogen release treatment. The partially hydrogen-released product is dispersed in a benzene solution containing polymethyl methacrylate, freeze-dried, and then melt-reacted in situ in a universal mold. This process is simple and highly controllable, significantly improving the mechanical stability and dendrite resistance of the lithium borohydride-based all-solid-state electrolyte, and enabling long lifespan of all-solid-state lithium batteries under fast-charging conditions, thus facilitating commercial applications.

The utility model belongs to the technical field of waste treatment, and discloses a demisting device for an absorption tower, the demisting device comprises a demisting assembly I and a demisting assembly II, the demisting assembly I is coaxially mounted in an air inducing pipeline, a backflow cavity I is positioned between the side wall of a reaction cavity and the inner side wall of the absorption tower, the top end of the backflow cavity I is open, and the air inducing pipeline is communicated with the backflow cavity I; a second backflow cavity is formed between the outer side wall of the air inducing pipeline and the outer cavity wall of the top end of the reaction cavity, the second backflow cavity is communicated with the air inducing pipeline, a hydrophilic semi-permeable membrane is arranged at the communication position, and the side end of the second backflow cavity is communicated with the first backflow cavity; the bottom of the exhaust cavity communicates with an air inlet pipeline, and the lower end of the air inlet pipeline communicates with the air inducing pipeline and the first backflow cavity. The second demisting assembly is installed in the air inlet pipeline, and an exhaust port communicating with the outside is formed in the top of the exhaust cavity. According to the demisting device, the flowing path of liquid is changed, the situation that the liquid and gas are repeatedly mixed to generate mist again can be reduced, secondary demisting is conducted through the second demisting assembly, and the demisting effect is improved.

The utility model relates to the field of air fryers, and particularly discloses an air fryer with high heating efficiency, which comprises a fryer main body, and the fryer main body comprises a cooking cavity, a hot air channel and an air source cavity. An air outlet communicated with the hot air channel is formed in the top of the air source cavity, and a centrifugal fan providing air flow power is arranged in the air source cavity. And a wind gathering cover is arranged in the wind source cavity and is provided with a flow guide part which is arranged around the periphery of the impeller of the centrifugal fan. The flow guide part can effectively guide airflow thrown out in the radial direction of the outer edge of the impeller, so that the airflow flows to the air outlet in a concentrated mode. A flow guide grid is arranged at the air outlet and provided with a grid plate extending towards the inclined upper portion. The inclination angle of the horizontal section, relative to the air outlet, of the grating plate is smaller than the inclination angle of at least part of airflow entering the hot air channel from the air outlet, at least part of high-speed airflow with the large inclination angle relative to the horizontal section at the air outlet can be buffered, and airflow turbulence and energy loss are reduced.

The application discloses a pPAM long-circulating liposome, a preparation method and application thereof, and the long-circulating liposome takes a blank liposome as a carrier, internally carries a plasmid pPAM, and is decorated on the surface with a transferrin-penetratin complex Tf-Pen and an oxytocin receptor antibody OTR Ab； The plasmid pPAM carries a cDNA sequence of a peptide acylglycine alpha amidation monooxygenase PAM; and the blank liposome is composed of DSPC, PEG 2000 , cholesterol and lecithin. The application provides a new direction for development of endogenous polypeptide synthesis enzyme delivery technology and mental drugs, and improves the possibility of preparing new anti-anxiety and depression drugs, relieving mental stress and improving patient compliance.

The invention belongs to the technical field of fuel cells, and particularly relates to a high-power closed cathode air-cooled fuel cell metal bipolar plate, an electric pile, a system and a design method.The metal bipolar plate specifically comprises an anode plate, a cooling plate and a cathode plate which are arranged in an upper-layer structure, a middle-layer structure and a lower-layer structure; a plurality of anode runners for anode fuel gas to flow are arranged in the anode plate; a plurality of cathode runners for cathode reaction air to flow are arranged in the cathode plate; a plurality of cooling straight flow channels for cooling gas to flow are formed in the cooling plate; the effects of high power density and low cathode voltage of the fuel cell are achieved by a regionalized metal bipolar plate configuration, and the problems of high parasitic power consumption and the like of an air compressor caused by low power density and large cathode voltage drop of the fuel cell under a high-power working condition in the prior art are effectively solved.

The invention is suitable for the technical field of cleaning equipment, and discloses a water pump assembly which is installed on a scrubbing device with a scrubbing head and comprises a shell, a support, a water pump and a rear end cover, the shell is hollow and provided with a cavity, the end, close to the scrubbing head, of the cavity is a water outlet opening end, the other end of the cavity is an electricity taking opening, and the electricity taking opening is detachably connected with a front end cover. The electrode structure exposed out of the front end cover is close to the output end of the battery component in the handle; the axial middle part of the bracket is hollow to form a through space, one end of the bracket is detachably connected with the power taking opening, and the other end seals the water outlet opening end; the water pump is installed in the through space and comprises a water inlet and outlet end and a power connection end, and the water inlet and outlet end is provided with a water inlet and a water outlet. The rear end cover is detachably connected with the water outlet opening end, the water inlet and outlet end partially penetrates out of the rear end cover and is close to the scrubbing head, and the rear end cover is provided with a through structure for a pipeline connected with a water inlet and a water outlet of a water pump at the water inlet and outlet end to pass through; the shell, the support and the rear end cover are installed and combined together, and the water pump is sealed in the shell.

This utility model discloses a miniaturized ceramic dielectric chip, belonging to the field of capacitor technology, to solve the problem that when the edge of a disc ceramic capacitor contacts the circuit board, stress concentration easily leads to edge breakage, which not only reduces the product yield but may also affect the reliability and service life of the entire circuit system. This utility model uses Y5U ceramic material with a dielectric constant of 8500-9200 as the ceramic dielectric substrate. Its shape is a cube with dimensions of 7×5×1.2mm. The four corners of both the front and back sides are chamfered, and the ends of the vertical edges on all four sides are rounded at the chamfer connections, with an arc length of 0.4mm-0.5mm. Within this arc range, the stress concentration problem during mounting is effectively alleviated, the structural stability of the chip is ensured, and the electric field distribution is optimized.