621results about How to "Improve dust resistance" patented technology

The invention discloses a dual-component aqueous polyurethane paint with scrawling resistance and pasting resistance, and a preparation method thereof. The dual-component aqueous polyurethane paint with scrawling resistance and pasting resistance is prepared by using aqueous hydroxy-containing polyacrylic resin dispersion and fatty group polyisocyanate as main film forming substances, adding organosilicon resin emulsion, deionized water, antifoaming agent, wetting agent, dispersant, pigment, dulling agent, wax emulsion and thickening agent and carrying out high speed disperse. The paint has characteristics of high crosslinking density, low surface tension, strong permeability resistance, good scratch resistance, substantial scrawling resistance and pasting resistance, excellent performances of low VOC content, high hardness, good weatherability, brushing resistance and chemical resistance, and is suitable for application fields of municipal public facility, building paint and terrace paint coating, etc.

The invention discloses a rotary annular-seam spray nozzle comprising a core seat, a rotary core and a rotary annular-seam spray hole, wherein a core cavity is arranged in the core seat, an inlet and an outlet which are communicated with the core cavity are arranged on the core seat, a core seat inlet is communicated with a pressure flow source, the rotary core can be sleeved into the core cavity in positioning and rotating modes and is concentric with the core cavity, a rotation-promoting flow path is arranged on the rotary core or/and the wall of the core cavity in order to mutually rotate the rotary core and the core cavity by using flow power, one end of the rotary core is penetrated into the core seat outlet, and the penetrating end forms the rotary annular-seam spray hole with the inner wall of the core seat outlet. The cross section of the spray hole of the rotary annular-seam spray nozzle is an annular seam, the annular seam and a diameter can be set to respectively and conveniently control the fineness and the flow of pressure spray and make liquid drop sizes more evenly and finely distributed. The rotary annular-seam spray nozzle has a self-cleaning function, is not easy to block and is in a self-closing dust-resisting type; the rotary annular-seam spray nozzle is arranged on a spray head body or the core seat of the rotary annular-seam spray nozzle is connected with the spray head body, the spray head body is communicated with the pressure flow source, and therefore, the spray device with the rotary annular-seam spray nozzle can be formed.

An air flow measuring instrument, comprising: an auxiliary passage 8 arranged inside a main passage through which fluid flows, a tabular member 5 on which a pattern of a heating resistor for measuring an air flow is provided on one face 5a, the tabular member being disposed inside the auxiliary passage so that the one face 5a on which the heating resistor pattern of the tabular member is provided is disposed along a flow of fluid inside the auxiliary passage 8, a heating resistor pattern-side fluid passage 8a portion formed so that the fluid flows between the face 5a and a passage-forming surface 8d of the auxiliary passage, and a back-surface 8b side fluid passage portion formed so that fluid flows between a face 5b on a side opposite to the face of the tabular member and the passage-forming surface of the auxiliary passage. Guidance portion 13 guiding dust that collides against the end portion to back-surface side fluid passage portion 8b side is provided on upstream-side end of tabular member.

According to an aspect of the present invention, there is provided an electric tool including: a housing; a motor that is housed in the housing; a tip tool; a rotation transmission mechanism that transmits a rotation of the motor to the tip tool; an air inlet that is disposed on the housing to introduce a cooling air for cooling the motor from an outside of the housing; an air outlet that is disposed to discharge the cooling air; and a cover that is slidable along an inner wall or an outer wall of the housing and that is movable in a first position where the air inlet and the air outlet are opened and a second position where the air inlet and the air outlet are closed.

This invention relates to a three-layer multifunctional anti-fogging film of polyethylene. The film has three layers, with the thickness ratio of 3:4:3. All the three layers are based on polyethylene, and the anti-fogging agent is added in the innermost layer. The film is molded by co-extrusion blowing, has good anti-fogging performance and low cost, and can inhibit crop diseases, increase crop illumination intensity, improve crop quality, and increase crop yield.

The invention relates to a capacitive sensitive type touch key based on MCU and a measuring method for the capacitance of the touch key. The touch keys are distributed on a PCB printed circuit and are respectively connected with an I/O end of the MCU and one end of a resistor R and the other end of the resistor R is connected with the ground. The invention has the advantages that (1) the capacitance touch sensitive technology is adopted to design the touch keys, the cost is low and the special sensor is not needed; (2) the power consumption is lower; (3) the sensitive type light touch can realize the output of the signals; (4) the realizing mode can be diverse and can realize positioning of precision; (5) the touch key can replace various mechanical keys, switches and proximity detectors; (6) the structure is simple and the wear resistance is good; and (7) as the traditional key is not used, the touch sensitive key can adopt a whole seamless panel, the dust prevention effect is excellent and the reliability of the product is improved.

The invention relates to the field of encapsulation of electronic component, in particular relates to a flame-retardant encapsulating material applicable to electronic and electric product and a preparation method of the flame-retardant encapsulating material, solving the problems of the prior art that the fire-proofing and flame retardant performance is poor, and relatively high flame-retardant rating cannot be obtained. The material comprises a component A and a component B; in percentage by weight, the component A comprises base stock bisphenol-A epoxy resin, fire retardant, diluent diethylene glycol dibenzoate, flexibilizer dioctyl phthalate, pigment, organic silicon defoaming agent and filler silica micropowder; the component B comprises curing agent phthalic anhydride or methyl tetrahydrophthalic anhydride, curing agent eleostearate anhydride, and accelerator 2, 4, 6-tri(dimethylamino methyl) phenol; before the flame-retardant encapsulating material is used, the component A is pre-heated in an oven and then uniformly agitated in an up-to-bottom way; and the component A and the component B are uniformly mixed, so as to obtain flame-retardant encapsulating material; and then the encapsulating can be carried out. The flame-retardant encapsulating material provided by the invention is mainly applicable to insulating packaging of various electronic components such as power engine, rail transit, war industry, spaceflight, car and power.

The invention provides a cooling system and a projecting apparatus adopting the same. The projecting apparatus comprises a shell and also comprises optical components, a lamp bulb assembly and a power supply component which are arranged in the shell. The cooling system comprises an air inlet, an air outlet, a dust preventing component, a cooling air channel, a lamp bulb component air-cooling unit, a power supply air-cooling unit and an exhauster; the air inlet and the air outlet are respectively arranged at two opposite narrower sides of the shell; the dust preventing component is arranged in the shell and clings to the air inlet; the cooling air channel clings to the dust preventing component and is internally provided with a plurality of fans and air guiding pipes which correspond to the fans, wherein the air guiding pipes lead to all the optical components; the lamp bulb component air-cooling unit and the power supply air-cooling unit collect the air-cooled exhausted air at the air outlet; and the exhauster is arranged in the shell and near to the air outlet and discharges the collected exhausted air out of the shell. When the dust is prevented, heating components in the projecting device are fully cooled, and local hot air accumulation is avoided.

A cable assembly including a cable, a metal clamp, and a tuboid metal case. The cable includes a outer insulator and a outer conductor thereinside. The outer conductor includes a protruding portion protruding to one side in the first direction from an end portion of the outer insulator on the one side in the first direction. The clamp holds the protruding portion and includes an end portion on the other side in the first direction. The metal case includes a swaged portion, which houses at least the end portion of the outer insulator and the end portion of the clamp. Swaged from outside, the swaged portion is in pressure contact with and fixed to at least the end portion of the outer insulator and the end portion of the clamp so that the end portion of the outer insulator is elastically deformed and the end portion of the clamp is plastically deformed.

The invention discloses an inorganic-organic hybrid super-hydrophilic self-cleaning coating and a production method thereof. The inorganic-organic hybrid super-hydrophilic self-cleaning coating is prepared from the following raw materials in percentage by weight: 60-90% of a solvent, 5-20% of a compound binder, 3-10% of a curing agent and 1-10% of a functional material. By adopting an inorganic-organic hybrid process, the inorganic-organic hybrid super-hydrophilic self-cleaning coating which is excellent in various performances such as hydrophilicity, dust resistance, pollution prevention, mildew resistance, weather resistance and durability is prepared. The coating is coated on the surface of a base material to form a concave-convex film of a micro-nano structure, so that the surface of the base material obtains the functions of hydrophilicity, dust resistance, pollution prevention, self-cleaning property and the like. The coating disclosed by the invention is suitable for large-area construction, has the advantages of high film forming hardness, high self-cleaning property, good wear resistance and good durability, and can be applied to surfaces of building external walls, glass, tiles, marbles, artificial stones, plastic, aluminum sheets, displays, walls and the like.

The invention provides an electric air supply respirator. The electric air supply respirator comprises a respirator body, a shell, a fan, a filter tank and a power supply, wherein an end face of the respirator body is provided with a casing hole; the lower edge face of the respirator body is provided with at least one one-way exhaust valve; an end face of the shell is provided with an air inlet; the other end of the shell is provided with a flow guide plate; the flow guide plate and the shell form at least one air outlet; the air outlet is positioned in the upper side of a nose of a user. The electric air supply respirator has a good dust-proof effect, air in the respirator is fresh, and the user breathes smoothly without feeling stuffy.

The invention relates to an LED bulb with a fan and a lamp, which belongs to the field of LED illumination. The lamp comprises a heat radiation shell, a bulb shell, an LED lamp body as well as a micro fan and a power supply which are arranged in the interior, wherein an assembly gap is arranged between the heat radiation shell and the bulb shell, and the assembly gap is matched with the heat radiation shell and the bulb shell to form an S-shaped air path for air ventilation, which increases the contact area of air flows with the bulb, particularly with the heat radiation shell and ensures that the bulb and the lamp have good heat radiation; and meanwhile, a first ventilation hole is arranged on the side wall of a groove, which ensures that the bulb has good dustproof effect, and the service life of the bulb and the lamp is prolonged.

The invention belongs to the technical field of new energy equipment application, and discloses a multifunctional new energy automobile charging pile. The multifunctional new energy automobile charging pile comprises a base and a pile body arranged at the top end of the base. A charging socket opening is formed in the side wall of the pile body, and a lamp tube is arranged at the top end of the charging socket opening. Solar cell panels are arranged at the top end of the pile body, and an alarm is arranged on the side wall of the pile body. An IC card reading unit is arranged on one side of the alarm, and an operation panel is arranged on one side of the IC card reading unit. A charging indicator lamp is arranged on one side of the operation panel, and a fault indicator lamp is arranged on one side of the charging indicator lamp. A water pipe is arranged on the side wall of the pile body, and one end of the water pipe is connected with a water gun head. The solar cell panels are arranged at the top end of the multifunctional new energy automobile charging pile to charge backup power storage devices in the charging pile; besides, the solar cell panels at the top end of the charging pile have the good effect of keeping out rain, and thus the service life is long.

The invention provides an electronic device which comprises a touch screen and a frame. The touch screen comprises a protective layer, a sensing layer and a first optical transparent adhesive layer. The first optical transparent adhesive layer comprises a first surface and a second surface which are arranged in a back-to-back mode. The protective layer adheres to the first surface. The second surface comprises a central region and a peripheral region. The sensing layer adheres to the central region, and the frame adheres to the peripheral region. The electronic device has good dustproof effect, and assembly is simple. The invention further relates to an assembling method of the electronic device.

The invention discloses a respirator with a novel breather valve. The respirator comprises an outer respirator body and a filtering inner respirator body which is detachably connected to the inner side of the outer respirator body in an attachment mode, the breather valve is fixed at the lower portion of the outer respirator body, and a groove is formed in the end, located on the inner side of the respirator, of the breather valve. A hole is formed in the position, corresponding to a valve body, of the filtering inner respirator body, a plastic sleeve is fixedly connected to the peripheral edge of the hole with an ultrasonic welding technology, and the plastic sleeve is clamped in the groove of the breather valve in an interference fit mode. The respirator is divided into the outer respirator body and the filtering inner respirator body; after the respirator is used, the filtering inner respirator body can be abandoned, and the outer respirator body can be left; by means of split structural design, material waste can be reduced, and the environmental requirement is met; meanwhile, the plastic sleeve is fastened on the valve body in a sealed and sleeved mode, it can be guaranteed that the good dust prevention effect of the respirator is achieved, and the combination immobility of the filtering inner respirator body and the outer respirator body is strengthened.

The invention discloses a wall skin cleaning device for building construction. The wall skin cleaning device for building construction includes a walking device, a lifting device, a turning device, amounting frame, a power device, a cleaning disc, and a cleaning blade; the lifting device is installed on the walking device, and the walking device can drive the lifting device to move; the turning device is installed on the lifting device, and the lifting device can drive the turning device to move up and down; the mounting frame is mounted on the turning device, and the turning device can rotate the mounting frame; the power device is fixedly installed on the mounting frame; the cleaning disc is connected to the power device, and the power device can drive the cleaning disc to rotate; and the cleaning blade is mounted on the cleaning disc, and the cleaning blade can move along the axis of the cleaning disc. The cleaning efficiency of the wall skin cleaning device for building construction is high; and through the cleaning blade which is arranged in a floating manner, the wall skin cleaning device for building construction can adapt to the cleaning of uneven wall surfaces.

The invention discloses a gas-sampling chamber which is applied in infrared gas analysis instrument (or sensor) field, is capable of reducing the affect of dust and water vapour on measurement accuracy furthermost so as to improve measurement accuracy. The chamber structure comprises a cavity body which is provided with an opening that allows an inner cavity to be communicated with the outside and a window that beam can permeate, and is characterized in that the inner cavity of the sampling chamber is also provided with a device that is capable of blocking the reflection of beams, which can be realized by making the inner cavity wall more rough, making the inner cavity wall with material that absorbs infrared light intensely, painting substance that absorbs infrared light on the inner wall surface or arranging a reflected light blocking ring that can block reflected light from entering the infrared detector in the sampling chamber cavity body. Then the rate of the reflected light reaching the infrared detector is approximate to zero, thereby improving the anti-dust capability and the anti-water vapour interference capability of the infrared gas analysis instrument (or sensor).

The invention discloses an external liquid storage box and a household appliance. The external liquid storage box comprises an internally hollow box body for accommodating liquid and also comprises abreathable unit which balances the air pressure inside the hollow box body with that of the outside. The breathable unit comprises an opening and a sealing cover mounted on the opening, one side surface of the sealing cover facing the opening is provided with a ventilation structure, and the ventilation structure communicates with the inside and the outside of the box body through the opening. Thepresent invention also provides the household appliance which is provided with a communication unit that is quickly connected to an external accessory, and the communication unit is mated with and connected to the external liquid storage box. According to the household appliance of the invention, an external detachable liquid storage box assembly manner is employed, so the maintenance of the liquid storage box is simple and convenient, a phenomenon that a clogging problem and the like cannot be solved is effectively avoided, the structure is simple, the disassembly is convenient, and replacement and cleaning are facilitated.