21 results about "Maintaining ventilation" patented technology

The invention discloses a convenient ventilation device for engineering construction, and relates to the technical field of ventilation devices.The convenient ventilation device for engineering construction comprises a ventilation box, a fixing frame is fixedly connected to the left side of the ventilation box, a fan is fixedly connected to the left side of the fixing frame, and a plurality of air inlet holes are formed in the outer side of the fixing frame; a filter plate is fixedly connected to the inner side of the ventilation box, a cleaning unit is arranged on the inner side of the ventilation box, and a motor and a handle are fixedly connected to the upper side of the ventilation box. According to the convenient ventilation device for engineering construction, by arranging the filter plate, the ventilation box, the draught fan and the ventilation pipe, external airflow is conveniently filtered, airflow enters a room, through a guide plate, a guide block lifting plate, a rotating rod, a rotating cylinder, a moving block, a brush, a swing frame, a gear and a toothed plate, the brush is conveniently controlled to move up and down, and the brush is controlled to swing repeatedly; the dust cleaning effect on the filter plate is improved, and ventilation smoothness is conveniently kept.

The utility model discloses a high-stability top-hung window door and window structure, which relates to the technical field of hung windows, and comprises a window frame and an insect prevention assembly, a window body is arranged in the window frame, the insect prevention assembly for high-stability insect prevention is arranged on the outer side of the window frame, and the insect prevention assembly comprises a mounting groove, a dustproof net, an elastic rope, an overturning frame and a connecting plate. A dustproof net is connected into the mounting groove, an elastic rope is mounted on the surface of the dustproof net, a turnover frame is connected to the end side of the dustproof net, a connecting plate is connected to the inner side of the turnover frame, a hinge is arranged on the side edge of the window body, and a connecting plate is connected to the lower end of the window body. According to the high-stability top-hung window door and window structure, the mounting groove is used for mounting and storing the dustproof net, the dustproof net plays a dustproof role after the window body is opened, mosquitoes are effectively prevented from entering the window under the condition that ventilation is kept, dust accumulation caused by excessive dust entering the window can be avoided, and the influence on the use stability of the window body is avoided.

The invention relates to the technical field of dust filtration and ventilation devices, and discloses a dust filtration and ventilation device for a communication base station machine room, the dust filtration and ventilation device comprises a shell, a ventilation cavity is formed in the shell, a ventilation fan is mounted in the ventilation cavity, cleaning cavities are formed in the top and the bottom of the shell, and the two ends of each cleaning cavity are connected with an air inlet cavity and an exhaust cavity respectively; the filter screen in the ventilation cavity can be replaced through rotation of the replacement disc, so that continuous ventilation of the ventilation device is kept, in the process that the filter screen is replaced by the replacement disc, energy storage can be conducted on the driving device, and when the filter screen enters the cleaning cavity, energy storage is conducted on the driving device. The driving device automatically releases energy and drives the cleaning mechanism to clean dust on the filter screen, part of airflow in the ventilation cavity enters the air inlet cavity under the action of the flow dividing mechanism, the dust on the filter screen is blown and cleaned through the entering airflow, and the cleaned dust is blown out of the exhaust cavity. While ventilation is kept, dust on the filter screen can be cleaned in a concentrated mode.

The present application relates to a kind of mosquito-proof and ventilated method, belong to building component technical field, solve the same screen window or screen door screen grid size in prior art is same, can play the role of ventilation, but cannot sunshade, and cannot be connected with frame when screen window is closed or cannot be automatically locked the angle between screen window and frame when screen window is opened Problem.The mosquito-proof and ventilated method of the present application includes the following steps: A, installation building component;B, mosquito-proof and ventilated;C, open screen window body;D, close screen window body;E, complete ventilation.The weft of the upper part of the screen is more than the weft of the lower part, the mesh area of the upper part is less than the mesh area of the lower part, so that the light transmittance of the upper part of the screen is less than the light transmittance of the lower part, the upper part of the screen can block more sunlight, can sunshade while maintaining ventilation and can prevent mosquitoes.

The utility model discloses a ventilation device connected with a high-temperature purification furnace and easy to maintain, which comprises the high-temperature purification furnace, a vacuum exhaust pipe is arranged above the high-temperature purification furnace, the lower end of the vacuum exhaust pipe is fixedly communicated with a connecting sleeve, and a quick connecting device is arranged between the connecting sleeve and the high-temperature purification furnace. A lifting device is arranged at the upper end of the high-temperature purification furnace, a top seat is arranged at the upper end of the lifting device, and a clamping and fixing device is arranged in the top seat and used for clamping and fixing the vacuum exhaust pipe. The utility model belongs to the technical field of ventilation of high-temperature purification furnaces, and particularly solves the problems that an exhaust pipeline of an existing high-temperature purification furnace is generally in an integrally fixed type, is inconvenient to disassemble and maintain, wastes time and labor, needs to stop the high-temperature purification furnace for a long time during disassembly and replacement, and is inconvenient to use. The ventilation device connected with the high-temperature purification furnace is easy to maintain.

The invention relates to the technical field of air conditioner outdoor units, and particularly discloses a low-noise variable-frequency air-cooled heat pump direct-expansion air conditioner outdoor unit which comprises a base plate, an air conditioner outdoor unit body is fixedly installed on the front face of the base plate, and a heat dissipation notch is formed in the front face of the air conditioner outdoor unit body. When the air conditioner outdoor unit operates, the cooling fan is started, a ventilation path is constructed through the cooling notch, external air enters through the air guide hopper, sequentially flows through the ventilation pipe and the noise reduction air pipe and then is exhausted, stable operation of the outdoor unit is guaranteed through efficient cooling, meanwhile, noise is guided to the ventilation pipe and the noise reduction air pipe, and the noise reduction effect is improved. The noise reduction plates which are spirally arranged in the noise reduction air pipe absorb sound in all directions under the condition of maintaining ventilation, even if noise escapes, the lower sound insulation cover, the upper sound insulation cover and the noise reduction sleeve seat can also play a role in sequence and block layer by layer, interference of the noise to the surrounding environment is greatly reduced, and a quiet and comfortable living space is created for residents.

A circulating backflow type air inlet parameter control device suitable for mine ventilation physical experiment belongs to the technical field of mine ventilation physical experiment, and comprises a multistage fan, an air source parameter adjusting unit, an air return filter, a PLC control cabinet, a central control console, a distributed sensor network and a static pressure buffer bin; the waste heat and moisture of the backflow air are pretreated in temperature, humidity and flow through the circulating backflow mode, the waste heat and moisture of the backflow air are recycled, the mine ventilation compensation mechanism is additionally arranged, the circulating backflow air after the precise regulation and control of the air source parameters is stably connected to the air inlet well under the constraint condition that the air inlet and outlet of the ventilation mine physical model are kept at atmospheric pressure without increasing the air inlet resistance, compared with the fresh air directly pretreated by the external environment in the traditional mode, the stability of the circulating backflow air can effectively shorten the air source regulation and balance time, can greatly reduce the equipment operation energy consumption and improve the experimental efficiency, and provides key technical support for the mine ventilation physical experiment with high simulation degree and low energy consumption.

The utility model relates to the technical field of compound fertilizer processing, and discloses a high tower compound fertilizer ventilation device which comprises a high tower compound fertilizer bottom bin, the bottom of the high tower compound fertilizer bottom bin is fixedly connected with a rotating motor, the side face of the high tower compound fertilizer bottom bin is fixedly connected with a control panel, and the control panel is electrically connected with the rotating motor. The two sides of the high-tower compound fertilizer bottom bin are of opening structures and are fixedly connected with compound fertilizer discharging hoppers, the top of the high-tower compound fertilizer bottom bin is fixedly connected with a cooling high tower, the top of the cooling high tower is fixedly connected with a feeding hopper, and the cooling device further comprises a ventilation device, a buffering device and a discharging device, and the buffering device is located at the lower end of the side face of the cooling high tower. According to the cooling device, the falling speed of particles can be slowed down, and the compound fertilizer particles can be cooled more uniformly while ventilation is kept, so that the product quality and the production efficiency are improved.

The utility model provides a hot opening test opening device which comprises a pipeline assembly, opening assemblies are arranged on the inner side wall and the outer side wall of the pipeline assembly, and each opening assembly comprises a limiting block, a second through hole, a sealing ring, a sleeve, an external thread, an internal thread, a nut and a threaded plug. By means of the pipe wall opening structure, the sealing performance of the ventilation pipeline can be kept, meanwhile, a user can conduct gas testing operation conveniently, in the testing process, the user only needs to unscrew the threaded plug, a testing instrument can be placed in the pipeline, and operation is easy. The connecting part is sealed through the fluorine-containing rubber sealing ring, so that the device can better adapt to an acidic or alkaline environment of a process exhaust system, the service life of a hot opening test port is prolonged, meanwhile, a good sealing effect is provided, the complexity of a ventilation pipeline system and the risk of gas leakage are effectively reduced, and meanwhile, the accuracy and efficiency of testing are improved; normal operation of a ventilation pipeline system can be guaranteed, the indoor environment is optimized, and the comfort level of personnel is improved.

The application relates to the technical field of medical instrument control, and discloses an intelligent control anesthetic gas delivery system, which comprises the following steps: when a target anesthetic concentration mutation is detected, the absolute mass gap is calculated based on a mechanical ventilation circuit dead space and an anatomic dead space; an effective feedforward time window of an electronic volatile tank is derived and generated according to basic setting parameters; an additional volume of gasified liquid medicine is calculated; the additional volume is inversely deducted and reconstructed from a target ventilation capacity of a turbine fan within the effective feedforward time window; a reconstructed flow trajectory is generated; an inspiration phase starting signal is used as a synchronous time zero point; a fan output airflow is synchronously driven; a driving pulse is issued to the volatile tank to spray medicine; a double boundary cut-off judgment of time and mass dimensions is executed in real time during the spraying process; the medicine spraying is cut off when any cut-off condition is met; and the fan maintains ventilation until the end of the inspiration phase. The application eliminates the deviation of gasification expansion on the tidal volume, and avoids overshoot of concentration adjustment.

This utility model relates to the field of louvers, specifically a sliding curtain wall ventilation louver device. It includes a window frame, ventilation opening, rotating shaft, flip-up baffle, driven gear, sliding groove, rack, filter frame, filter screen, and placement slot. Using this utility model, air can be purified while keeping the ventilation opening open, significantly reducing the rate of indoor dust accumulation and decreasing daily cleaning workload.

The utility model provides ventilation energy-saving equipment for buildings, and relates to the technical field of building ventilation, the ventilation energy-saving equipment for the buildings comprises a base, an oil smoke filtering assembly, a filtering cavity, a metal filtering net and a material receiving groove, a three-way pipe is arranged on the filtering cavity, and the three-way pipe is provided with a vertically arranged upper port and a horizontally arranged side port; an unpowered air cap is arranged at an upper end opening of the three-way pipe, a centrifugal fan is arranged at a side end opening of the three-way pipe, one-way valve sets are arranged in the upper end opening and the side end opening of the three-way pipe, and when the unpowered air cap can be normally used under the action of natural wind, the requirement for building ventilation can be met through the unpowered air cap; and the unpowered wind cap does not consume electricity and has a good energy-saving effect, so that when the unpowered wind cap cannot be normally used under the action of natural wind, the building can be continuously kept ventilated through the arranged centrifugal fan, the centrifugal fan can assist the unpowered wind cap to meet the ventilation requirement of the building, and the use effect is good.

The present invention discloses a ventilation silencer based on a perforated plate, which relates to the field of noise control and solves the problem that the existing ventilation perforated plate silencer has a high sound absorption peak frequency, a low sound absorption coefficient, a narrow bandwidth, and affects ventilation. The present invention includes a plurality of back cavities, a plurality of baffles, a plurality of micro-perforated plates, and a folded channel, wherein the baffles include an upper baffle, a plurality of lower baffles, and a plurality of side baffles; a plurality of micro-perforated plates, an upper baffle, and a plurality of lower baffles are vertically installed at both ends of a plurality of side baffles to form a back cavity; a plurality of back cavities are arranged in an enclosed manner, and the enclosed central area is a ventilation channel, wherein two back cavities are connected by a folded channel. The present invention can produce a sound absorption effect on medium and low frequency sound waves through the cooperation of the back cavity and the micro-perforated plate under the condition of maintaining ventilation, has good sound absorption performance, and has a good sound absorption bandwidth, and can use any rigid material to achieve an ideal sound absorption effect.

The present invention aims to provide a flip anti-water ingress ventilation duct device which has a compact structure, good ventilation quality, can meet the ventilation and air permeability requirements during normal operation, automatically closes the waterproof function when flipped, and automatically maintains ventilation and air permeability after flipping is restored. The present invention includes a duct and a protective component, the bottom of the duct is connected to the cabin, the protective component is arranged on one end of the duct, a check valve is arranged between the duct and the protective component, a gravity valve disc matched with the check valve is hinged on one end of the check valve close to the protective component, a sealing gasket is arranged between the gravity valve disc and the check valve, and an opening is provided at the bottom of the protective component, and the cross section of the opening is parallel to the horizontal plane. The present invention is applied to the technical field of waterproof structures of ventilation ducts.

The utility model discloses a civil air defense ventilation filtering device easy to maintain in the field of civil air defense equipment, which comprises a box body, the box body comprises a main box body and a side end cover, the main box body and the side end cover are inserted and fixed through bolts, an air inlet and an air outlet are respectively arranged at the front end and the rear end of the main box body, a sliding chute is arranged at the top and the bottom in the main box body, and a filtering plate is inserted in the sliding chute. The filter plate comprises a front frame, a rear frame and a filter element layer clamped between the front frame and the rear frame, positioning holes are formed in the edge of the filter element layer, and positioning columns and positioning grooves are formed in the positions, corresponding to the positioning holes, of the front frame and the rear frame respectively. The civil air defense ventilation filtering device easy to maintain has the advantages of being low in maintenance cost, high in maintenance efficiency, good in sealing performance and the like.

The utility model provides a kind of enhanced heat dissipation device, including lathe main body, the one side of lathe main body is fixedly installed with heat dissipation frame, the heat dissipation frame opening place slidingly cooperated with two maintenance doors of oppositely arranged, the two sides of heat dissipation frame are all set with the heat dissipation groove being connected with its inner cavity, the adjusting assembly that is cooperated with maintenance door is all set in two sides heat dissipation groove, the heat dissipation frame is detachably installed with multiple radiator groups, the one side of each radiator group is fixedly installed with heat dissipation fan. Through the linkage structure of maintenance door and adjusting assembly, the flexible switching of grating plate in ventilation state and cleaning state is realized, keep ventilation gap when closing to guarantee heat dissipation, when opening, rotate to vertical plane to form flat clean surface, solve the problem that traditional fixed grating inside soot is difficult to clean, reduce the ventilation volume drop caused by soot, maintain long-term stable heat dissipation efficiency.

The utility model relates to the technical field of distribution boxes, in particular to an outdoor operation distribution box. The top of the box body is provided with a top cover; the bottom of the box body is provided with a base; the front side of the box body is provided with a box door; an observation window is arranged in the box door; a wire inlet device and a wire outlet device with the same structure are respectively arranged at the bottom of the rear side of the box body; according to the device, the wire inlet device and the wire outlet device are arranged, different wire conduits can be selected for installation according to the diameters of wires as required, so that the wires with different diameters can be installed, and the wire inlet device and the wire outlet device which are obliquely arranged can prevent water flow from entering along the wires; the device is provided with a waterproof ventilation structure and a quick-replacement filter screen assembly, rainwater is prevented from entering while the ventilation effect is kept, and a filter screen can be quickly replaced; the device is provided with an observation window, so that the state of equipment in the distribution box can be directly observed when an accident occurs.

The utility model discloses a ventilating duct with adjustable length, which relates to the technical field of ventilating ducts and comprises a ventilating duct main body, adjusting ducts are symmetrically arranged at two ends of the ventilating duct main body, a mounting bracket is fixedly mounted at the upper end of the ventilating duct main body, and adjusting mechanisms are symmetrically arranged on the outer side of the ventilating duct main body. The same linkage mechanism is arranged on the two front-back corresponding adjusting mechanisms on the outer side of the ventilation pipeline body, and a connecting frame is welded to the ends, away from the ventilation pipeline body, of the adjusting pipelines. By the adoption of the structure, the adjusting pipeline on the ventilation pipeline body can be adjusted and used from the outside through cooperation of the adjusting mechanism and the linkage mechanism, on the basis that adjustment is achieved, smoothness between the ventilation pipeline body and the adjusting pipeline is kept, wind power obstruction is reduced, and the service life of the ventilation pipeline is prolonged. And follow-up maintenance and use of the ventilation pipeline body or the interior of the adjusting pipeline are facilitated.

The invention belongs to the technical field of tunnel ventilation, and particularly relates to a ventilation device for a gas tunnel. The two sides of the top of the connecting frame are each fixedly connected with a pair of symmetrically-arranged guide rails. The surfaces of the paired guide rails are jointly connected with a moving seat in a sliding manner; the bottom surface of each moving seat is fixedly connected with a silencing cylinder; the top of the connecting frame is rotationally connected with a rotating rod; the surface of the rotating rod is fixedly connected with a pair of symmetrically arranged mounting frames; and fans are arranged at the ends, away from the rotating rod, of the mounting frames, and replacement of new and old fans at the top and the bottom of the rotating rod can be achieved through rotation of the rotating rod, so that it is guaranteed that when the damaged old fan is replaced in time, the new fan can replace the old fan in time to work, and then it is guaranteed that when the old fan is replaced or maintained, the new fan cannot work. Ventilation can still be kept in the tunnel, and therefore life health and safety of constructors are guaranteed.

The application discloses a semi-buried deep well pump house limited space self-control ventilation method, and has the characteristics that the method comprises the following steps: a door lock opening and closing sensing device detects the opening and closing state of a first door lock, sends an electric control signal to an electrical system main control box, controls the starting of a ventilation equipment, and waits for a gas detection device to detect the air condition of the lower limited space; after maintaining the ventilation state for 20 minutes, the ventilation equipment stops running, if the toxic and harmful gas in the limited space exceeds a fixed dangerous value, an alarm buzzer sounds an alarm sound and a warning light flashes, and the safety door cannot be opened, if no toxic and harmful gas is detected in the limited space, the safety door is automatically unlocked to allow workers to enter the limited space to work. The application has the beneficial effect of avoiding the danger that may be caused by manually carrying an air detection instrument into the limited space, and greatly improves the safety guarantee when workers enter the work site.