85results about How to "Improve the absorption rate" patented technology

The invention discloses a broadband wave absorber and broadband wave absorber array based on a resistive film. The broadband wave absorber based on the resistive film is composed of a top resistive film layer, an intermediate resistive layer, a bottom metal backboard and two air layers between the three layers, wherein the resistive film layer is composed of a hexagonal dielectric substrate and ahexagonal resistive film ring, and the resistive layer is composed of a hexagonal dielectric substrate and a hexagonal metal ring loaded with resistance. The broadband wave absorber array adopts triangular periodic arrangement, which has better angular stability compared with common quadrilateral periodic arrangement. Compared with the common wave absorber loaded with lumped resistance, the broadband wave absorber has wider wave absorbing bandwidth and wave absorbing rate, thereby having important application prospects in stealth technology, electromagnetic compatibility and radar wave absorbing technology.

The invention relates to a method for preparing leather use environment-friendly thickening type nano composite tanning agent which takes trolamine modified maleic anhydride, methacrylic acid and montmorillonite as raw materials, and adopts a load evocating agent method to prepare the leather use environment-friendly thickening type nano composite tanning agent. Raw sheep skin can be thicken by 112% by using the tanning agent, and crust leather can be thicken by 33% after being tanned by 2% of chromium powder, so that one leather can be changed into multiple leathers, thus remarkably increasing profits and ensuring the absorbing rate of chromium to be higher. Therefore, the nano composite tanning agent can improve the profits of leather, and is environment-friendly and has good performance.

The invention discloses a bi-layer filter structure for cyclone separation, belonging to dust separator of a dust collector. The bi-layer filter structure of the invention comprises a cone-shaped flattop filter cover evenly provided with filtration pores and a terminal pad which integrally forms a mesopore with the bottom opening thereof, and the other side of the terminal pad integrally forms anannular combination part combined with a motor cavity; the cone-shaped flat top filter cover evenly provided with filtration pores has a bi-layer structure keeping certain space. The invention with the design can change flow field distribution between two layers and can effectively reduce the flow of air which contains dust and enters a filter along tangential direction in cyclone separation space, thus distributing adsorbed air containing substances, such as dust and the like into each filtration pore as much as possible; as a result, dust has enough time to be separated out, thus improvingfiltering efficiency and keeping enough high adsorption rate.

The invention discloses a low-noise oil smoke extracting device capable of balancing air flow and an oil stain cleaning method. The low-noise oil smoke extracting device comprises an oil smoke guider and a fan, wherein an air inlet and an air outlet are formed in a shell of the oil smoke guider; an air outlet channel is formed in the shell; the air outlet is communicated with the air outlet channel; at least one air hole is formed in the front end surface of the shell; the air outlet channel extends forwards to be near the air hole; the air outlet and the fan are connected through an oil smoke outlet pipeline; the air inlet is connected with an air input pipeline; and the oil smoke guider is arranged at the rear side of a cooking range. According to the low-noise oil smoke extracting device, an air outlet device and an air inlet device are simultaneously arranged on an extractor hood, and therefore, when the upper end of the shell of the extractor hood exhausts air, the lower end of the shell of the extractor hood can immediately supply air to the environment around the cooking range so as to avoid the formation of a negative pressure state of the environment around the cooking rang and consequently oil smoke drifting does not happen; oil smoke can be completely exhausted to clean just by adopting the fan with low rotation speed, big blades and small power; air power noise can not be generated by the fan; and therefore, the noise of the extractor hood caused by the fan is lowered greatly.

The invention discloses a road sweeper suction nozzle. The road sweeper suction nozzle comprises left suction nozzles, right suction nozzles, suction tubes, air blow pipes, walking wheels and baffles,wherein the air blow pipes are arranged in right rears of the suction tubes, the left suction nozzles are hinged with the right suction nozzles, the upper portions of the left suction nozzles and right suction nozzles are connected with movable connecting rods, the rear portions of the left suction nozzles and right suction nozzles are provided with the walking wheels and fixed brackets, the front portions of the left suction nozzles and right suction nozzles are provided with the baffles respectively, the two sides of the baffles are hinged with suction nozzle seats through two parallel connecting rods respectively, and the middles of the baffles are connected with baffle air cylinders. The road sweeper suction nozzle has the advantages that the air blow pipes are arranged to supplementair for the suction tubes, residual garbage is blown to the suction tubes, thereby greatly increasing the cleanness suction rate and effectively avoiding secondary dust raising; the arranged hinged left and right suction nozzles replace a single width suction nozzle so that the suction nozzles can automatically level on the uneven road surface, and the front ends of the suction nozzles are provided with the liftable baffles so as to improve the equivalent diameter of inhalation and the cleanness suction rate.

This invention discloses a kind of kitchen ventilator with air curtain. It includes outer casing, kitchen ventilator, electric engine, oil-fumes absorbing switch, oil fume absorbing opening, oil fume passage, smoke outlet and power line. The air curtain fan, air passage, airport, switch and power line are arranged in the said outer casing. The number of air curtain fan can be one or more than one. The airport can be set at left and right sides or left, right and front sides. This invention can increase the oil-fumes absorbing rate.

The invention belongs to the technical field of microwaves, and particularly relates to a frequency selection wave absorber. The wave absorber structurally comprises a loss layer and a transmission layer from top to bottom, wherein the loss layer comprises a first square ring metal patch, a circular ring metal patch, four rectangular metal patches welded with resistor elements, a first square dielectric plate and a second square ring metal patch; the transmission layer comprises a metal coating, and the metal coating is divided by a square ring gap and four right-angle gaps; and the first square ring metal patch and the rectangular metal patch cover the upper surface of the first square dielectric plate, and the second square ring metal patch covers the lower surface of the first square dielectric plate. The wave absorber has the advantages of being high in wave absorbing rate and low in loss, can be used for improving the stealth capacity of a broadband radar of aviation weaponry and solves the design problem of an airborne radio frequency aperture broadband radar stealth electromagnetic window of a high-stealth aircraft.

The invention relates to the field of kitchen smoke ventilator. Aiming at defects of low absorption rate and trouble of oil-filter screen unpicking and washing, the invention discloses an air vortex type range hood The invention is characterized by providing two different suction types: an air vortex type and an adjustable type. And two types of machines, both without an oil-filter screen, have general main members of a power portion and a general electrical principle. An air vortex generator of the air vortex type range hood can generate negative pressure suction effect like natural tornado, and maintain the advantages of a European style smoke ventilator. The adjustable type range hood is set against a wall with a fore rake of 20 DEG, and a large plane circumferential suction inlet can be adjusted freely to a state of near suction or even cover suction. The range hood has a high absorption rate, and a traditional so-called oil screen is replaced by a de-oiling technology to realize zero oil-filter screen and zero unpicking and washing, so as to change household heavy pollution area into a healthy and environmental-friendly place, and to facilitate daily cleaning. In addition, the range hood, which has a similar structure and implementation difficulty to a traditional product, is novel and unique and focuses on real effects. Therefore, the range hood has a substantial popularization value.

The invention relates to a method for improving resin comprehensive performances by producing an ion exchange resin framework white ball through an interpenetrating, cross-linking, suspending and polymerizing process, and the specific range involved comprises similar interpenetrating and cross-linking of styrene/divinyl benzene and styrene/divinyl benzene, heterogeneous interpenetrating and cross-linking of styrene/divinyl benzene and divinyl benzene or triallyl isocyanurate as well as heterogeneous interpenetrating and cross-linking of styrene/divinyl benzene and chloroethylene/ divinyl benzene. According to the method disclosed by the invention, a white ball (smaller than 0.3 mm) with an unqualified once polymerized ball body is polymerized again under the same condition through secondary polymerization, so that the grain size is increased, and the white ball which meets standard grain size range (greater than 0.3mm-0.8mm); under the special condition, various resins prepared by performing secondary polymerization on a same monomer cross-linking agent of different concentrations can effectively reduce heterogeneity, in the polymerized ball body, of the cross-linking agent.

The invention relates to a lower-suction range hood, comprising a smoke exhaust hood arranged above or at side top of a stove, a suction device arranged below the smoke exhaust hood, a connection passage for connecting the smoke exhaust hood and the suction device and a vent passage connected with an air outlet of the suction device, wherein the suction device is arranged below the stove so that a suction motor is far from ears of cooking staff with relatively small noise, the noise can be smaller if the suction device is arranged in a cabinet below the stove; (2) fewer circuit and less accessories are arranged in the smoke exhaust hood which is easy to clean; (3) the structure is rational, the smoke exhaust hood, the connection passage and the suction device are separately connected with each other, so that the product is convenient to package and transport, the influence to fitment is avoided, the wall cupboard space cannot be occupied and the appearance is beautiful; the connection passage can be composed of a plurality of pipelines so that the change to old kitchen is convenient.

The invention relates to a dust collecting barrel with a separated part, which comprises a barrel body, a handle, an upper cover, a filter core, a compressed part and a separated part, wherein the barrel body is provided with an air inlet; the handle is connected with the barrel body; the upper cover is connected above the barrel body and is provided with an air outlet in the middle; the compressed part is arranged at the lower part of the barrel body and comprises a fixed baffle plate and a rotating sheet connected with a vertical shaft; the separated part is arranged in the barrel body, combined with the upper edge of the filter core and positioned above the compressed part; and the separated part comprises an air guiding shield and a separated sheet, wherein the air guiding shield is provided with an inner air inlet, and the separated sheet is connected with the lower end of the air guiding shield. In the invention, because the separated part is arranged, the rotating airflow which enters the dust collecting barrel rotates in the separated part, and the rotating airflow is separated and filtered in the rotating process to further prevent a large amount of dust from entering the filter core, thus the separating and filtering effects on dust are good. In addition, because the rotating airflow only rotates in the separated part and can not be in contact with the compressed part, the air speed can not be reduced, the energy can not be consumed, and the absorption ratio of a dust collector is high.

The invention discloses a plate surface dust removal device, and relates to the technical field of plate cleaning equipment. The plate surface dust removal device comprises a machine body, the machinebody is arranged on a plane, the machine body comprises a main frame arranged on the plane, a translation module is arranged inside the main frame, and the translation module is fixedly connected with the main frame; a moving frame is arranged on the lower surface of the main frame, connected with the translation module in a matched mode and moves in the extending direction of the main frame through the translation module; a bearing device is arranged below the moving frame and comprises a containing shell, the interior of the containing shell is hollow, the containing shell is located belowthe moving frame, and a gap exists between the containing shell and the moving frame; a dust blowing device is arranged inside the bearing device; and dust suction devices are arranged below the bearing device and evenly distributed on the lower surface of the containing shell in a looping mode, and a space is reserved between the dust suction devices arranged in the looping mode. According to theplate surface dust removal device and a using method thereof, and the problems that in the prior art, chippings on the surface of a plate cannot be effectively removed, and working environment pollution is easily caused by dust are solved.

The invention relates to a daily maintenance cleaning machine for a simulated plant grass wall. The daily maintenance cleaning machine comprises a movable trolley, a dust removal device and a cleaningdevice, wherein the dust removal device is arranged at the upper end of the movable trolley, and the cleaning device is arranged on the dust removal device. According to the daily maintenance cleaning machine and method for the simulated plant grass wall, the dust removal device and the cleaning device are matched with each other to carry out dust cleaning and flushing treatment on the simulatedplant grass wall, so that the cleaning degree of the simulated plant grass wall is improved, and the dust removal and the flushing can be selected according to different indoor and outdoor requirements.