65results about How to "Realize the sterilization function" patented technology

The invention relates to the technical field of refrigerating equipment, particularly to a fresh-keeping and sterilizing device for a refrigerator and a control method. The fresh-keeping and sterilizing device for the refrigerator comprises an electric control board, a DC high voltage supply and an ionizer which are connected sequentially, wherein the ionizer comprises a positive ion discharge electrode and a negative ion discharge electrode; the output DC high voltage of the ionizer can be adjusted when input voltage is constant, and high voltages required by fresh keeping and sterilizing respectively are obtained. According to the invention, by adjusting the designed circuit of the DC high voltage supply inside the ionizer, switching to the output voltage of the ionizer is achieved, and the problem that a traditional ionizer for a refrigerator can only output a fixed DC high voltage and only can achieve the fresh keeping function or the sterilizing function when the input voltage is constant, is solved, in the invention, through intelligent control of the refrigerator, the combination of the fresh-keeping function and the sterilizing function is achieved, and the effect that one device ensures the sterilizing function and the fresh-keeping function at the same time inside the reefer of the refrigerator is achieved.

The invention provides an electrostatic dust removal device. The electrostatic dust removal device comprises an electrostatic dust collection assembly (100), a formaldehyde removal assembly and an ozone reduction net (700), wherein the formaldehyde removal assembly comprises a base plate (200), a formaldehyde removal catalyst and a plurality of first flow guide through holes; the base plate (200) is coated with the formaldehyde removal catalyst; the ozone reduction net (700) is used for reducing ozone into oxygen. The electrostatic dust removal device has a formaldehyde removal function.

The invention relates to frozen fruit and vegetable and a fruit and vegetable fresh keeping process, and belongs to the field of food preservation. The fresh keeping process comprises the following steps of putting the fruit and vegetable raw materials into a liquid nitrogen environment with the temperature being -110 to -60 DEG C or a micro frozen liquid environment with the temperature being -40 to -20 DEG C to be quickly frozen for not less than 3min; then, the fruit and vegetable raw materials are put into a warehouse for cold storage or cold chain transportation. The process has the advantages that the process is simple; the operation is convenient and fast; the fresh keeping effect is good; the cost is low. The frozen fruit and vegetable obtained through the process can maintain the raw material mouthfeel; the freshness degree of the raw materials can be maintained for a long time.

The invention relates to an intelligent electrochemical water treatment device with cyclically strengthened sterilization and alga killing functions. The device comprises an electrochemical water treatment device and an intelligent control system and is mounted in a circulating water system in a bypass pipeline form, wherein the electrochemical water treatment device can switch a circulating water treatment mode and a cyclical strengthened sterilization treatment mode through the intelligent control system according to feedback data of an ORP (oxidation-reduction potential) sensor mounted in a cold water tank of the circulating water system. The device can effectively remove Ca<2+>, Mg<2+> and other scale forming substances in water and reduce water hardness, also has sterilization and alga killing functions and can realize cyclical strengthened sterilization, automatic scale-removal washing and intelligent operation parameter adjustment.

The invention provides a sterilization surface light source and a refrigerator. The sterilization surface light source comprises a light guide plate and a light source. The light source is installed on the light guide plate. Light emitted by the light source is emitted out through the outer surface of the light guide plate. A catalyst coating is arranged on the outer surface of the light guide plate and can absorb light emitted by the light source to perform sterilization. According to the sterilization surface light source, due to the arrangement of the light guide plate, light emitted by a point light source or a line light source can achieve the illumination effect of the surface light source, and therefore the light is softer, a larger region can be covered with the light, and a high-end illumination effect is achieved. Due to the fact that the catalyst coating is arranged on the plate face of the light guide plate, the sterilization problem of the refrigerator is easily solved according to the principle that the catalyst coating absorbs optical energy to kill bacteria.

The present invention relates to frozen delicacies from land and a preservation technology of the delicacies from land, and belongs to the field of food preservation. The preservation technology comprises the following steps: raw materials of the delicacies from land are placed in a liquid nitrogen environment at -120 DEG C to -60 DEG C or a micro-freezing liquid environment at -40 DEG C to -25 DEG C to be quick-frozen for 5 min or longer, then the quick frozen delicacies from land are sent into a storage to be cold stored, and the cold stored delicacies from land are subjected to a cold chain transportation. The raw materials of the delicacies from land comprise bamboo shoots and edible fungi. The technological process is simple, easy to operate, excellent in preservation effects and low in costs. The obtained delicacies from land by the above technology are good in mouthfeel, and small in dry consumption rate, and can keep freshness of the raw materials for a long time.

The invention provides a suspended-ceiling-type multifunctional drying device, comprising a control box, telescoping mechanisms and a drying rack; the telescoping mechanisms are disposed on two sidesbetween the control box and the drying rack and are used for lifting the drying rack; an ultraviolet sterilizing device, a lifting control device, a hot air drying device and a water collector are disposed in the control box; the drying rack comprises connection cross arms; each connection cross arm includes an arm body, a side arm and a bottom arm, the side arm and the arm body are in pluggable connection, and the bottom arm and the arm body are in pluggable connection; the side arms are connected with drying bars, and the bottom arms are connected with connection shanks. The suspended-ceiling-type multifunctional drying device has the functions of sterilizing, sun drying, air drying, heat drying, dehumidifying, lighting and the like; the combination structure enables the sun drying structure to be more stable and more attractive in appearance.

The invention discloses a cell culture temperature regulation device which comprises a pretreatment box, a cell culture box and a temperature control plate, wherein the temperature control plate is arranged at the top of the cell culture box, a PD control module and a control connection circuit of the PD control module are arranged in the temperature control plate, the pretreatment box is arrangedbelow the front end of the cell culture box, a joint inner cavity is arranged in the pretreatment box and the cell culture box, a vertical stopping plate is arranged above the front end of the cell culture box, a sliding groove corresponding to the vertical stopping plate is arranged below the cell culture box, the inner cavity of the cell culture box is independently provided with an air temperature regulator and a cell culture frame, a heat dissipating plate is independently arranged at the rear end of the cell culture box, and a heat dissipating fan set is arranged on the heat dissipatingplate. According to the cell culture temperature regulation device disclosed by the invention, a cell culture device is divided into the pretreatment box and the cell culture box; furthermore, different temperature regulations can be achieved in the same equipment, so that convenience is brought to accurately adjusting temperature.

The invention relates to a special ultrasonic sterilization and disinfection device for a medical and surgical instrument. The special ultrasonic sterilization and disinfection device comprises a fixed table, wherein a base plate is arranged on the lower end face of the fixed table; four universal wheels are symmetrically arranged on the lower end face of the base plate; the special ultrasonic sterilization and disinfection device can be freely moved to a designated position through the four universal wheels below the base plate, and the simplicity and convenience in operation are realized; four parallel branched chains are symmetrically arranged on the upper end face of the fixed table; an operation board is arranged at the top ends of the four parallel branched chains; a fixed column is welded on the upper end face of the operating board; a fixed disk is welded on the upper end face of the fixed column; six fixing round holes are symmetrically arranged in the fixed disk; six sterilization lifting branched chains are respectively and fixedly arranged in the six fixing round holes. According to the special ultrasonic sterilization and disinfection device disclosed by the invention, the ultrasonic cleaning, sterilizing and disinfecting functions of the surgical instrument can be realized, the classified placement and quick taking functions of the surgical instrument can be also realized, the surgical progress is accelerated, and the working efficiency is improved; in addition, the special ultrasonic sterilization and disinfection device has the advantages of simplicity and convenience in operation, good sterilizing and disinfecting effects, adjustable lifting height and the like.

The invention belongs to the technical field of photocatalytic environmental protection and particularly provides a multifunctional air purification lighting system for household use. The multifunctional air purification lighting system comprises an LED lighting system body for lighting, a function system body for air purification and a detection control system body. The LED lighting system body and the air purification function system body are controlled by the detection control system body so that the operation time and the corresponding power of the LED lighting system body as well as the operation time and the corresponding power of the air purification function system body can be determined. According to the multifunctional air purification lighting system, a 365 nm-400 nm ultraviolet LED light source is used for destroying the structure of DNA in bacteria, virus and other microorganisms, and a sterilization function is achieved; meanwhile, the ultraviolet LED light source is used for irradiating a nano photocatalytic filling layer to promote degradation of organic matters and elimination of peculiar smells, and a catalyst can be used repeatedly for a long time; the cleanliness and the comfort degree of the home environment can be effectively improved; and in addition, environmental protection, energy saving and low cost are achieved.

The invention discloses a water-saving device for a toilet stool. The water-saving device comprises a shell, a water inlet pipe arranged on the shell, a water inlet valve arranged in the shell and connected with the water inlet pipe, a control switch installed in the shell and connected with the water inlet valve, a Venturi generator arranged in the shell and connected with the water inlet valve through a pipeline, a liquid chemical box installed in the shell and connected with the Venturi generator through a pipeline, and a water outlet pipe arranged on the shell and connected with the Venturi generator through a pipeline. The Venturi generator is provided with a water inlet, a liquid chemical inlet and a water outlet, the water inlet is connected with the water inlet valve through a pipeline, the liquid chemical inlet is connected with the liquid chemical box through a pipeline, and the water outlet is connected with the water outlet pipe. The sterilizing and cleaning liquid chemical and the recycled water are fully mixed through the Venturi effect, the sterilizing function is achieved, the recycled water can be recycled, cleanliness and sanitation are achieved, and the phenomenon that an existing water-saving device can breed a large number of bacteria, and secondary pollution is caused is avoided.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and a cleaning and sterilizing method thereof. The problem that the cleaning function and the sterilization function of an existing air conditioner can be achieved only by additionally arranging elements is solved. Therefore, the cleaning and sterilizing method comprises the steps thatthe surface temperature of an indoor heat exchanger is kept above the preset temperature; after a first preset time, an indoor fan is made to rotate reversely; and self-cleaning operation of the indoor heat exchanger is executed. Due to the fact that high temperature can completely cover each corner in an indoor unit, therefore, other sterilization components do not need to be additionally arranged in the high-temperature sterilization mode, and all bacteria in the indoor unit can be effectively killed; and then, the indoor fan is controlled to rotate reversely, so that dust, impurities and bacterium residues are attached to the surface of the indoor heat exchanger, and then the self-cleaning operation of the indoor heat exchanger is executed, so that the sterilization function and the cleaning function of the indoor unit are effectively achieved on the basis that any element does not need to be additionally arranged.

The invention relates to a multifunctional illuminating system for a refrigerator. The multifunctional illuminating system comprises a white light LED (Light Emitting Diode) illuminating module, a freshness keeping module, a sterilizing module, a deodorizing module and a control module, wherein driving devices of the illuminating module, the freshness keeping module, the sterilizing module and the deodorizing module are controlled and regulated by the control module. According to the multifunctional illuminating system for the refrigerator, the illuminating module, the freshness keeping module, the sterilizing module and the deodorizing module are integrally mounted, and the situation that the functions of an illuminating system for the refrigerator are single is changed, so that the multifunctional illuminating system has multiple functions of freshness keeping, sterilizing, deodorizing and the like besides the illuminating function.

The invention discloses a production process of medical spunlace non-woven fabric. High-density cotton yarn, activated carbon fiber and nano-silver modified slurry are adopted as raw materials, and the medical spunlace non-woven fabric is obtained through raw material opening, carding web forming, spunlace reinforcing, dipping modification, fruit dyeing treatment, drying and reeling processing. The nano-silver modified slurry is composed of nano-silver powder, modified starch, polyvinyl alcohol, 2-naphthol, potassium hydroxide and deionized water. The cotton yarn is blended and modified by adopting the activated carbon fiber and the nano-silver modified slurry, the sterilization function of the medical non-woven fabric is achieved, meanwhile, steam does not need to be consumed in the dyeing process, no chemical additive or chemical dye is needed, a fruit dyed product has the characteristics of being purely natural, healthy and comfortable, a layer of natural active pectin can be formedon a dyed cloth cover, unique soft luster is generated, the moisture absorption and air permeability are improved, and good skin friendliness is achieved.

The invention provides an agricultural seed sterilizing and drying device. The agricultural seed sterilizing and drying device comprises a bottom plate, wherein a treatment box is arranged on the bottom plate; a pesticide box is arranged at the bottom of the left side of the treatment box; a boosting pump is arranged at the top of the pesticide box; a partition plate is arranged in an inner cavityof the treatment box and is used for dividing the treatment box into a first disinfection space and a second disinfection space; a sealing plug is arranged at the middle of the bottom of the inner cavity of the treatment box; a collection box is arranged at the bottom of the sealing plug; ultraviolet sterilization lamps are arranged on the left side and the right side of the top of the inner cavity of the treatment box; a hot air blower is arranged at the right end of the upper surface of the bottom plate; an air outlet pipe is arranged at the left end of the hot air blower. Through combination of the pesticide box and the ultraviolet sterilization lamps in the device, the device has the double functions of sterilizing and disinfecting the seeds; the hot air blower is arranged at the right end of the upper surface of the bottom plate and has a function of drying the seeds; the device has the characteristics of simple structure, high practicability and excellent sterilizing and dryingeffects.

The invention provides an excrement processing device for bird breeding. The device comprises a temporary storage box, a rear push plate, a cover, a rear connecting base, a rack, a supporting base, agear, a front connecting base and a front push plate; the cover is fixed to the lower side face inside the temporary storage box, an open groove is formed in the right side face of the cover, the gearis installed at the annular side face of a rotating shaft, the supporting base is fixedly arranged at the lower side face inside the temporary storage box at the right side of the rotating shaft, a sliding groove is formed in the upper side face of the supporting base, a sliding block is arranged inside the sliding groove, the rack is connected to the upper side face of the sliding block, the left end of the rear connecting base is installed at the rear end of the right side face of the rack, the front side face of the rear push plate is connected with the right end of the rear side face of the rear connecting base, the left end of the front connecting base is installed at the front end of the right side face of the rack, and the rear side face of the front push plate is connected with the right end of the front side face of the front connecting base. Due to the design, the function of timely discharging and processing bird excrement is achieved, and the device is convenient to use, rapid in processing, safe, reliable and capable of saving manpower.

The invention relates to an oil refining reclaimed water reuse high-concentration-ratio circulating water treatment method and device. The method and device are characterized in that electrochemical water treatment complete equipment is connected to a water return main pipeline of a circulating cooling system in parallel for water quality treatment of circulating water, wherein reclaimed water obtained after deeply processing oil refining waste water serves as supplemented water. The electrochemical water treatment complete equipment carries out circulating taking and using treatment on the circulating water through circulating water return residual pressure. Softening and sterilization of water quality of the circulating system are achieved in an electrolysis mode, and the concentration ratio of the circulating water is effectively increased. The method can increase the sewage recycle rate of refining enterprises, consumption of fresh water is reduced, pollution of drained water to the environment is reduced, and meanwhile the method and the device have the advantages of being low in energy consumption, low in cost, environmentally friendly, free of pollution and high in automation degree.

The invention belongs to the field of food processing, and relates to a processing preparation method of abalone, in particular to a preparation method for canned abalone. The method comprises the following processing steps of cleaning, wherein abalone flesh is placed in 50-400 g / L starch slurry to scrub and remove melanin and mucus on the edge of the abalone flesh; soaking, wherein the abalone flesh is placed in black tea water to be soaked for 1-4 h after being cleaned up; pickling, wherein the abalone flesh is taken out from the black tea water and then placed in a mixed solution of salt, starch, scallion oil and ginger wine to be pickled; steaming, wherein a food steamer is adopted to steam the pickled abalone flesh under the ginger juice solution steam; canning and sterilizing, wherein the steamed abalone flesh is placed in can bodies which are processed through high temperature sterilization, after purified water or double-boiled soup is added, the can bodies are sealed, and then sterilization processing is performed. Therefore, the purposes of easily and conveniently removing the abalone melanin, improving the taste of the abalone and prolonging the quality guarantee period of the canned abalone are achieved.

The invention relates to a sterilization control method for a single-cold-type air conditioning unit. The method comprises the steps that a sterilization control instruction is received, according to the sterilization control instruction, a first electric valve is closed, the flow direction of a condensing agent from a compressor to a condenser is cut off, and a second electric valve is opened, so that the flow direction of the condensing agent is adjusted to be a path from the compressor to an evaporator through the second electric valve. According to the scheme, due to the fact that the first electric valve and the second electric valve are arranged on an air conditioner refrigeration loop, the flow direction of the condensing agent is changed by controlling the closing state of the first electric valve and the closing state of the second electric valve, the sterilization function of the single-cold-type air conditioner unit is achieved, and a single-cold-type air conditioner has the heating and self-cleaning effects.

The invention discloses a water purification device and a water circulation system. The water purification device comprises a filter assembly, a negative oxygen ion generator, a nanobubble water generator and a controller electrically connected with the negative oxygen ion generator and the nanobubble water generator, wherein a main valve is arranged on a water inlet pipeline of the water purification device and electrically connected with the controller; a water inlet of the filter assembly is communicated with the water inlet pipeline of the water purification device, a water outlet of the filter assembly is communicated with a water inlet of the nanobubble water generator, and an air outlet of the negative oxygen ion generator is communicated with the water inlet of the nanobubble watergenerator; a water outlet of the nanobubble water generator is communicated with a water outlet pipeline of the water purification device. Water in a roof water tank can become purified to meet the use demand by the aid of the water purification device and the water circulation system.

The invention discloses a mask paper towel, which comprises a first layer of paper unit, a second layer of deodorizing unit, a third layer of sterilization unit and a fourth layer of paper unit, each layer unit is connected by pressing, and the first layer of paper unit There are card holes on both sides of the paper towel. This paper towel can be used as an ordinary paper towel. When encountering an environment with heavy air pollution, it can be inserted into the ears through the card holes on both sides of the first layer of paper unit, so that it can be used as a mask. , and the paper towel is provided with a second-layer deodorizing unit and a third-layer sterilizing unit, which can realize the functions of purifying and sterilizing the air, and greatly increase the use function of the paper towel.

The invention relates to the technical field of glass, particularly to environment-friendly automobile glass, which sequentially comprises a substrate layer, a transition layer and a conductive functional layer, wherein the transition layer is a silicon dioxide layer or a silicon nitride layer, the conductive functional layer is a doped titanium dioxide film layer or the conductive function layeris a composite layer comprising a doped titanium dioxide film layer and an ITO thin film layer, and the ITO film layer is located between the transition layer and the doped titanium dioxide film layer. The environment-friendly automobile glass provided by the invention is simple in structure, simple and convenient in preparation process, low in production cost and powerful in function.

The invention provides a sterilization structure and an air conditioner. The sterilization structure comprises a volute fixing plate and a sterilization device, the volute fixing plate is suitable for fixing a volute of the air conditioner, and an opening communicated with an air outlet of the volute is formed in the volute fixing plate. The sterilization device is arranged on the volute fixing plate, located on the peripheral side of the opening and suitable for radiating sterilization substances or sterilization light towards the air outlet direction of the volute. The sterilization device is arranged on the volute fixing plate, sterilizing substances or sterilizing light rays emitted by the sterilization device intersect with air blown out of the volute, air is sterilized, air outlet health is guaranteed, a clean and sterile working environment can be provided for a wind wheel in the volute, and the wind wheel is prevented from breeding bacteria.

The invention discloses an electronic commerce logistics conveying device. The device comprises a U-shaped cover, wherein a first fixing box and a second fixing box which communicate with each other are fixedly connected to the two sides of the U-shaped cover correspondingly, and two second supporting rods which are symmetrically arranged are fixedly connected to the bottom of the second fixing box and the bottom of the first fixing box correspondingly, dust removal assemblies used for removing dust from express items are arranged inside the second fixing box and the first fixing box, a conveying assembly used for conveying the express items is arranged below the U-shaped cover, a plurality of containing boxes are fixedly connected to the top of the conveying assembly, and the containing boxes penetrate through the interior of the U-shaped cover. The invention further discloses a using method. The device has the beneficial effects that the express items are fixed through the fixing assembly, the device can adapt to express items of different sizes, the dust removal effect is good, manual dust removal is not needed, the sterilization and drying functions can be achieved, after treatment is completed, the express items do not need to be manually taken down, automatic express item collection is achieved, the structure is simple, and operation is convenient.

The invention belongs to the technical field of sterilization, and particularly relates to a UV sterilization device and a purifier. The UV sterilization device comprises a UV module used for generating ultraviolet rays, wherein the output end of the UV sterilization device is provided with an optical lens used for enhancing the sterilization effect of the ultraviolet rays generated by the UV module; ultraviolet light beams generated by the UV module irradiate the optical lens, the optical lens refracts the ultraviolet light beams, then the ultraviolet light beams irradiate an object, air or flowing water after being refracted by the optical lens; and the optical lens is additionally arranged, and the ultraviolet light beams generated by the UV module are converged through the optical lens. The sterilization intensity of unit area is enhanced, so that the sterilization effect is further improved.

The invention discloses a multi-filter-element precision air filter, and particularly relates to the technical field of air purification. The multi-filter-element precision air filter comprises a filter shell and an air inlet, the air inlet is fixedly connected to the middle position of one side of the filter shell, and a noise reduction structure is arranged on the outer side wall of the filter shell. An end cover is arranged in the middle of the other side of the filter shell, an air outlet is fixedly connected to one side of the end cover, a structure convenient to disassemble and clean isarranged between one side of the end cover and one side of the filter shell, and a humidifying mechanism is arranged on one side of the top end in the filter shell. According to the multi-filter-element precision air filter, by arranging scale marks, a water tank, an atomizer and spray heads, during use, the atomizer is turned on, water in the water tank enters the atomizer through a hose, is atomized by the atomizer and then is uniformly sprayed out through the spray heads, filtered air can be humidified, and the indoor air humidity can be kept in summer; and comfort of employees is improved.

The invention relates to a circulating water zero drainage separate recycling treating device and a treating method thereof. The circulating water zero drainage separate recycling treating device comprises a circulating water collecting pool, a mixing device, a filter aid agent adding system, a filter unit, a sewage pool, a filter press, a nanofiltration device, a nanofiltration filtrate collecting tank, a nanofiltrationtrapped fluid collecting tank, an electrodialysis device, an electrodialysisconcentrated water collecting tank, an evaporative crystallization device and an electrochemical treating device. The treating method comprises the steps of firstly, adopting the technologies of chemical filter aid, precipitation, filter and the like to conduct turbid lowering and suspension removing pretreatment, then adopting a nanofiltration separate purification treatment technology to achieve salt separation treatment, concentrating and evaporating obtained filtrate to obtain sodium chloride solid, after conducting electrodialysis treatment on nanofiltered trapped fluid, producing recycled circulating water, and after conducting electrochemical rigidity lowering and sterilizing on strong brine, producing recycled water. The salt content of the circulating water can be effectively lowered, the problems of scaling and corrosion brought by too high ionic concentration of a circulatingwater system are solved, and meanwhile, efficient salt separation treatment and resource recycling are achieved.

The invention belongs to the technical field of medical instruments, particularly relates to a novel portable vaginal speculum for gynaecology and obstetrics, and aims at solving the problems that when an existing vaginal speculum is operated, the sight of a doctor can be shielded by hands, examination is inconvenient, an external light source needs to be used for illumination, the illumination effect is poor, the doctor needs to always control the vaginal speculum during examination, and the workload of the doctor is increased due to long-time work in the prior art. The following scheme is provided: the vaginal speculum comprises a vaginal speculum body and a dustproof cover, a mounting groove is formed in the vaginal speculum body, and an observation hole is formed in one side of the vaginal speculum body; the examination function is achieved through cooperation of a supporting assembly, a control assembly and a fixing assembly, due to the fact that the control assembly is arranged on the lower portion, sight cannot be blocked, examination can be better conducted, fixation can be conducted at any time, a doctor does not need to extrude a holding rod all the time, and the workloadof the doctor is reduced.

The invention relates to the technical field of lime powder disinfection of silkworm nests, in particular to intelligent silkworm breeding equipment. The equipment comprises a machine frame, an electromagnetic vibration discharging machine, a discharging channel, an intelligent detection system, a mounting frame, silkworm nests and a displacement driving system, the electromagnetic vibration discharging machine is arranged beside the machine frame, the intelligent detection system is arranged in the discharging channel, and the mounting frame can be arranged on the machine frame in a sliding mode in the direction parallel to the conveying direction of the machine frame. The intelligent detection system comprises a controller and a pressure sensing mechanism, the displacement driving system comprises a horizontal displacement device, a vertical displacement device and a rotary driving device, and the controller is electrically connected with the pressure sensing mechanism, the horizontal displacement device, the vertical displacement device and the rotary driving device. The intelligent detection system in the equipment automatically controls the overall discharging speed and the lime powder discharging uniformity degree, the lime powder scattering amount in each silkworm nest is kept within a certain range, the intelligent degree of the equipment is improved, and the sterilization effect on the silkworm nests is improved.