58results about How to "Avoid pressure difference" patented technology

A vent is mounted in a building wall so as to enable air exchange between the interior of the building and the outside environment. A first set of plural, spaced apart, air guide members and a second set of plural, spaced apart, air guide members are formed using elongate units each having a base element contiguous with opposing leg elements. The base elements of the first set of guide members are arranged in a first vertical plane, while the base elements of the second set of guide members are arranged in a second vertical plane, wherein the planes are in parallel horizontal mutual displacement. The leg elements of the two sets of air guide members are positioned and interlaced to force air flow moving through the apparatus is make a first right angle turn followed by a “Z” shaped turn and then a second right angle turn.

The invention discloses shading adhesive tape which comprises a first glue layer and a second glue layer. A groove is formed in the bonding side of the first glue layer or the bonding side of the second glue layer. According to the shading adhesive tape, the groove is formed in the bonding side of the first glue layer or the bonding side of the second glue layer, therefore, when the shading adhesive tape is used for being bonded with a liquid crystal display screen module with a backlight module, air existing between a liquid crystal screen and the backlight module and between all optical films in the backlight module can be communicated with external air through the groove, and a pressure difference is prevented from being generated. Therefore, in the vacuum all-gluing process, the problem that a liquid crystal display screen module is bent, deforms, skips, drifts and the like is avoided, and popularization of the vacuum all-gluing technology is achieved.

The invention discloses a piece of shading tape, a backlight module, a display device and a cutting die and relates to the technical field of display. By means of the shading tape, the backlight module, the display device and the cutting die, on the basis of preventing the liquid crystal display device from generating light leakage, the problems of adsorption and attachment of an optical film layer and a liquid crystal panel can be solved. The shading tape is in an annular shape and comprises a shading layer and glue layers arranged on the surfaces of the two sides of the shading layer, each glue layer comprises an inner side face and an outer side face, the glue layers are provided with air through grooves, and the air through grooves penetrate through the outer side faces and the inner side faces. The shading tape, the backlight module, the display device and the cutting die are used for fixing the liquid crystal panel to the backlight module.

The invention discloses a cooking utensil and a control method of the cooking utensil. The cooking utensil comprises: a body provided with a pot body, wherein the pot body is provided with an accommodating space for placing food materials; an air pump arranged on the body and having an air inlet pipe communicated with the outside and an air outlet pipe communicated with the accommodating space; and an exhaust hole formed in the body and communicated with the accommodating space. Through the arrangement, when foams are generated in a pot, a user can start the air pump to introduce cold air intothe pot; and after the cold air cools the temperature in the pot, the foams generated in the pot can be prevented from overflowing, so that the normal use is guaranteed for the user. Moreover, overflowing foams can be prevented from corroding the cooking utensil, so that the service life of the cooking utensil is prolonged.

A gear apparatus for a solid-bowl screw centrifuge. The centrifuge includes a drum and a screw, both of which drum and screw are configured to be driven and the screw is further configured to be driven at a different rotational speed relative to the drum. The gear apparatus is connected between one or more drive motors and the screw and the drum. The gear apparatus is continuously filled with a lubricant and includes a hollow drive shaft having at least one hollow channel.

The invention discloses an internal-external gas pressure balancing assembly for a refrigerator and the refrigerator with the assembly. The balancing assembly disclosed by the invention is provided with an air tube which communicates with the inner part of an inner container of the refrigerator and an air door which is used for starting and closing the air tube; the air door is made of iron magnetic materials; the balancing assembly is also provided with an electromagnet which is arranged on one side of the air door and is used for controlling starting/closing of the air door; when the electromagnet is powered on, the electromagnet is adsorbed to start the air door and enable the air tube to be conducted; the inner part of the inner container of the refrigerator communicated with the outside through the air tube; and when the electromagnet is powered off, the electromagnet is released to close the air door so as to block the air tube. Based on the special structure of the internal-external gas pressure balancing assembly for the refrigerator disclosed by the invention, the air door is controlled through the electromagnet to be opened, so that communication between the inner container and the outside of the refrigerator can be realized; and moreover, in the application scene of the special refrigerator, before the door body of the refrigerator is opened, through communication between the inner container and the outside of the refrigerator, pressure intensity difference between the inside and the outside of the refrigerator can be avoided, and thus, the door body of the refrigerator is conveniently opened by a user.

The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a magnetic actuator (1) for directly controlling a preferably needle-shaped injection valve member (2), by means of the stroke movement of which at least one injection opening (3) of the fuel injector can be released or closed. The magnetic actuator (1) comprises an armature element (4) that can carry out a stroke movement in order to control the control pressure in a control volume (5). According to the invention, the injection valve member (2) can be mechanically coupled to a hydraulic intensifier (6) during a first phase of the injection valve member opening stroke, said intensifier having a hydraulic active surface A1 which delimits the control volume (5) and which together with a hydraulic active surface A2 that is formed on the injection valve member (2) is larger than a hydraulic active surface A3 that is formed on the armature element (4) and delimits the control volume (5) so that a force amplification is caused on the basis of the surface area ratio of the hydraulic active surfaces A1, A2, and A3 that are relevant to the control volume (5). Furthermore, according to the invention the injection valve member (2) can be mechanically coupled to the armature element (4) during the injection valve member closing stroke, the pressing force of an armature spring (7) being applied to said armature element in the closing direction of the injection valve member (2) such that the closing stroke of the injection valve member (2) can be caused by means of the armature spring (7).

The invention discloses a bucket elevator. The bucket elevator comprises a driving device, an anti-reversal device, a traction device, a base, a housing, a supporting plate, a material stopping plate, a feeding opening and a discharging opening. The housing of the bucket elevator is provided with an air suction pipe and a ventilation opening, hence, internal pressure and external pressure of the bucket elevator can be balanced, pressure difference can be prevented, and the phenomenon that dust overflows from the discharging opening, and thus material waste and environmental pollution are caused is avoided. Moreover, the dust is accumulated in a gap between an inner filter net layer and an outer filter net layer through a double-layer filtering cover, and therefore workers can clean up the dust conveniently and regularly.

The invention provides a pure electric vehicle battery charging protection method and device. The method comprises the following steps that: the internal storage information of a system is emptied when a battery starts to be charged; voltage and current information of any battery cell is collected, and whether the current of the battery cell is stable or not is judged; if the current of the battery cell is stable, a first voltage value of the battery cell is acquired, and a second voltage value of the battery cell is acquired after T seconds; voltage difference value of the battery cell is calculated according to the first voltage value and the second voltage value, and the voltage difference values of all the battery cells in the system in a preset sampling period are recorded; and when the voltage difference value of any battery cell in the preset sampling period is greater than the threshold value, fault latching is carried out, and charging is forbidden. According to the method anddevice, whether a fault occurs or not is judged by judging a voltage drop condition when current is stable, voltage difference abnormity caused by current fluctuation is avoided, and the accuracy ishigh; and the abnormal drop of the voltage of each cell in a charging process is judged, the fault is locked, and therefore, safety is improved.

The invention discloses a control valve of a carbon tank. The carbon tank comprises an upper cover and a shell, wherein the upper cover is provided with a Laval pipe shaped through hole; the shell is internally provided with a magnetic tank, a coil framework, a coil, a contact pin, a magnetic core, armature iron and a valve seat; and the magnetic tank is internally provided with a cavity. The coil framework, the coil and the contact pin are mounted in the cavity; the coil framework is provided with a hollow shaft; the coil is wound at the periphery of the hollow shaft of the coil framework; the contact pin is fixed on the coil framework; a copper line of the coil is electrically connected to one end of the contact pin; the magnetic core is located in the hollow shaft of the coil framework and is fixed with the magnetic tank by screw threads; the armature iron and the valve seat are respectively arranged on the coil framework; a through hole with a radial section is arranged at the center of the valve seat; and a spring is arranged between the magnetic core and the armature iron. By adopting the Laval pipe structure, the control valve of the carbon tank, disclosed by the invention, can overcome a difference of pressures at two ends of the control valve of the carbon tank and realize a relatively steady gas flow.

The invention discloses a fly ash separation and returning device for a layer-burning biomass boiler. The device consists of a returning leg and a cyclone concentrator, wherein the cyclone concentrator consists of a cylindrical transition section, a funnel-shaped taper tube, a cylindrical central tube, a tobacco pipe-shaped inlet and a heat-resistant alloy steel filter screen mesh; the returning leg is arranged on the lower part of the cyclone concentrator, and is communicated with a lower cavity of a rear arch of the layer-burning biomass boiler; the cylindrical central tube is arranged in the upper center of the cylindrical transition section; the heat-resistant alloy steel filter screen mesh is arranged on the upper side part of the cylindrical transition section in a downward inclination way. According to the device, flue gas carrying a great number of small unburned biomass fuel particles enters the cylindrical transition section from the tobacco pipe-shaped inlet, the small unburned biomass fuel particles are separated and concentrated to an inlet of the returning leg, and reenter a hearth for burning under the action of the heat-resistant alloy steel filter screen mesh due to the fact that the flow velocity of the flue gas rapidly decreases, and clean flue gas flows out of the cylindrical central tube; therefore, the efficiency of the boiler is improved, tail burning risks are lowered, and equipment such as a bag-type dust collector is protected.

The invention relates to a self-decompression multi-lip sealing bearing which comprises an inner ring, an outer ring, steel balls arranged between the inner ring and the outer ring, a retainer and a seal ring, wherein the seal ring comprises a sealing piece and an L-shaped framework; the L-shaped framework is arranged in the sealing piece; a chuck is arranged on the outer side edge of the sealingpiece; a plurality of sealing lips forming dip angles outwards are arranged on the inner side edge of the sealing piece; the chuck is mounted in a groove in the inner circumferential surface of the outer ring in a clamping manner; the sealing lips are in interference contact with the outer circumferential surface of the inner ring and are uniformly distributed from inside to outside; the sealing lips and the inner ring jointly form labyrinth seal; the thickness of the sealing lip on the outer side is greater than that of the sealing lip on the inner side; an inner groove is formed in one sideof the sealing lip on the innermost side; an outer groove is formed in one side of the sealing lip on the innermost side; and the sealing piece adopts modified hydrogenated acrylonitrile butadiene rubber. The self-decompression multi-lip sealing bearing is high in sealing performance and can effectively release the pressure intensity in the bearing to enable the internal pressure intensity and external pressure intensity of the bearing to be consistent.

The invention discloses a device for preparing an organic fertilizer from sludge. The device comprises a preparation shell, a feeding groove is formed in one side of the preparation shell, one side ofthe feeding groove communicates with a feeding hopper, a feeding mechanism is arranged at the end, close to the feeding groove, of the feeding hopper, and a fixing groove is formed in the top of thepreparation shell; heating and dehumidifying mechanisms are fixedly connected to the inner walls of the fixing grooves correspondingly, supporting plates are rotatably connected to the two sides of the inner wall of the preparation shell through electric control rotating pins correspondingly, a smashing and self-cleaning mechanism is arranged below the inner wall, close to the supporting plates, of the preparation shell, and a door plate is rotatably connected to one side of the preparation shell through a hinge; and the lower portion of one side of the preparation shell communicates with a discharging port, and the bottom of the preparation shell is fixedly connected with a support. According to the device for preparing the organic fertilizer from the sludge, which relates to the technical field of fertilizer processing, the automation degree of the device for preparing the organic fertilizer is improved, the working efficiency of the device is improved, and the labor intensity of workers is reduced.

The invention relates to the technical field of glass processing, in particular to glass processing annealing equipment which comprises a glass annealing kiln and a conveying belt, the glass annealing kiln is internally provided with a heater, the conveying belt is installed in the middle of an inner cavity of the glass annealing kiln in the front-back direction, and the glass processing annealing equipment further comprises two windshield mechanisms and a driving mechanism, the two supports are respectively mounted at openings in the front and rear sides of the glass annealing kiln; the cleaning mechanism is arranged at the bottom end of an inner cavity of the glass annealing kiln in the front-back direction; the windshield mechanism comprises: a frame mounted at the opening of the glass annealing kiln; the multiple baffles are inserted into the inner cavity of the rack from left to right in an up-down sliding mode. Gas circulation between the glass annealing kiln and the outside is reduced, the air pressure difference in the glass annealing kiln is avoided, it is guaranteed that glass products are evenly heated, the annealing effect of the glass products is high, glass fragments can be conveniently collected and taken out, and personnel scalding caused by manual cleaning is prevented.

The invention discloses a pressure balance control method and device for a blast furnace coal injection system. The method includes the steps that a blowing tank A at the last phase in the braize blowing sub-process stable blowing state is connected with a blowing tank B in a blowing waiting state through a connecting pipe by opening a first stop valve and a second stop valve at the same time; and when the pressure difference deltaP between the blowing tank A and the blowing tank B is extremely small, the absolute value of a difference of PTA and PTB is smaller than or equal to deltaP, the first stop valve and the second stop valve are closed at the same time, and pressure balance control is completed. The pressure balance control device comprises the blowing tank A and the blowing tank B which are sequentially communicated through the connecting pipe, and the connecting pipe is sequentially provided with the first stop valve and the second stop valve. According to the pressure balance control method and device, the pressure difference between the blowing tank A and the blowing tank B is controlled through the first stop valve and the second stop valve, pressure balance between the blowing tank A and the blowing tank B is achieved, shortcomings such as pressure fluctuation, the hysteretic nature, overregulation or under-regulation in the prior art can be eliminated, and the pressure balance control method and device have the remarkable economic benefit on stable production of a blast furnace.

The invention discloses a novel aviation kerosene coalescence separator which comprises a barrel, a safety valve connector and an automatic exhaust valve are arranged at the upper end of the barrel, the automatic exhaust valve is connected into a torch system, the lower end of the barrel is connected with an inlet pipe and an outlet pipe, and a coalescence filter element, a separation filter element, a coalescence filter element tray and a separation filter element tray are arranged in the barrel. The coalescence filter element is connected to the coalescence filter element tray, the separation filter element is connected to the separation filter element tray, an opening used for being connected with the inlet pipe is formed in the lower portion of the coalescence filter element tray, and an opening used for being connected with the outlet pipe is formed in the lower portion of the separation filter element tray. The bottom of the barrel is further connected with a liquid cutting pipeline. The upper end and lower end of the outer surface of the barrel are connected with a first double-flange liquid level meter and a second double-flange liquid level meter respectively. By means of the coalescence separator, manual operation can be greatly reduced, long-term stable operation of the coalescence separator is achieved, abnormal pressure difference of the coalescence separator and damage to a filter element caused by gas gathering inside the coalescence separator are avoided, and long-term stable operation of the device is kept.