12results about How to "Guaranteed ventilation efficiency" patented technology

The utility model relates to the technical field of packaging shell, provide an electronic packaging shell of high -efficient heat dissipation, its including shell, first fin and second fin, the shell is sealed housing, is equipped with the interface on the lateral wall of shell, first fin is the flat plate, first fin is integrally formed on the top surface of shell in vertical form, first fin is equidistant evenly distributed on the top surface of shell, second fin is the air -permeable board, second fin horizontal arrangement integrally formed connection all first fin. The electronic packaging shell of high -efficient heat dissipation can guarantee the exchange efficiency of shell surface air, realizes stable and high -efficiently to complete heat dissipation.

The utility model relates to generator set protection equipment technical field, concretely relates to a construction generator set shell with fire prevention function, including base, top cover and side wall coaming, the side wall coaming is fixed on the base, and the top cover is buckled and is connected with the top of side wall coaming, the side wall coaming adopts double -deck composite structure, including the metal protection board and fire -retardant lining that set gradually from outside to inside, the metal protection board surface is coated with high -temperature -resistant anticorrosive coating, and the back of fire -retardant lining is connected through buckle and metal protection board up and down sliding insertion, the metal protection board inboard is equipped with the flow guide rib that abuts with the back of fire -retardant lining, be equipped with the guide slot that is matched with the buckle shape on the flow guide rib, and form the ventilation interlayer between adjacent flow guide rib, the top cover is composed of the extension plate of triangle and the cover plate of top inclination, be equipped with the radiating window on the extension plate, the radiating window inside integrates multilayer fire -retardant metal net.

The utility model relates to the technical field of central air conditioner noise reduction, and discloses a central air conditioner air outlet noise reduction device which comprises an outer frame body, a clamping groove is formed in the bottom end of the outer frame body, a shielding assembly is arranged on the inner wall of the clamping groove, and the shielding assembly comprises a shutter located on the inner wall of the clamping groove in a clamped mode. First fixing bolts are in threaded connection with the inner walls of the four corners of the bottom end of the shutter, the upper sides of the outer walls of the first fixing bolts are in threaded connection with the inner walls of the clamping grooves, an air guiding piece is clamped to the top end of the outer frame, an air outlet is fixedly connected to the bottom end of the air guiding piece, and a mounting shell is connected to the outer wall of the air outlet through a guiding assembly. And sound insulation cotton is fixedly connected to the inner wall of the mounting shell. The sound insulation cotton is shielded by the mounting shell and directly surrounds the outer wall of the air outlet, noise generated by the air outlet can be effectively absorbed, the sound insulation cotton does not make direct contact with the outside, the service life of the sound insulation cotton can be prolonged to the maximum extent, redundant space in the air outlet cannot be occupied, and the ventilation efficiency of the air outlet is kept.

The utility model relates to the technical field of cable tunnel ventilation, and provides an extra-high voltage long-distance cable tunnel ventilation system and a cable tunnel, the extra-high voltage long-distance cable tunnel ventilation system comprises a plurality of ventilation subsystems which are sequentially arranged along the length direction of the tunnel, a first firewall is arranged between two adjacent ventilation subsystems, and a second firewall is arranged between two adjacent ventilation subsystems. Each ventilation subsystem comprises an air feeder, an exhaust fan and n fireproof sections sequentially arranged in the tunnel in the length direction of the tunnel, n is an integer larger than or equal to 3 and smaller than or equal to 5, and every two adjacent fireproof sections in each ventilation subsystem are communicated through a normally-open fireproof door. The air feeder and the exhaust fan are arranged at the two ends of the tunnel section where the ventilation subsystem is located in the length direction correspondingly and communicate with the tunnel section and the outside correspondingly. The number of fans used is reduced, the construction difficulty is reduced, the construction cost is saved, and the economical efficiency and the reliability of cable tunnel ventilation can be both considered on the whole.

The utility model relates to the technical field of ventilators, and discloses an air volume adjustable gooseneck ventilator which comprises a ventilator body, the air inlet end of the ventilator body is connected with a sealing cover in a rotating mode, a clamping lock is installed on the ventilator body and can be connected with the sealing cover in a clamping mode, a cover plate set is connected into the ventilator body in a rotating mode, the cover plate set comprises a plurality of identical cover plates, and the cover plates are connected with the clamping lock in a clamping mode. The cover plates are fan-shaped, the cover plates can be spliced into a complete disc, the cover plate set can seal the air inlet end of the barrel, a plurality of electric push rods are rotationally installed in the barrel, and the output ends of the electric push rods are correspondingly and rotationally connected with the cover plates. And when the cover plate is opened, no shielding part exists, so that the ventilation efficiency is ensured while the ventilation quantity is adjusted.

The utility model discloses a kind of ventilation and air exchange devices in electric power well, it is related to electric power well field, to solve the problem of the internal air flow of existing technology in electric power well is not smooth, when electric power well is overhauled, technical personnel enters the internal electric power well and is easy to produce the problem of hypoxia condition.The air inlet upper end is provided with a supply air pipe, the middle part inside the supply air pipe is provided with a supply air fan, the supply air pipe upper end extends out of ground and is connected with a ventilation pipe, the air outlet upper end is provided with an air outlet pipe, the air outlet pipe upper end extends to ground and is fixedly connected with well lid fixing seat, the well lid fixing seat inside is provided with a support ring, the support ring inside upper end is fixedly provided with a ventilation net, by setting supply air fan and ventilation pipe forced air supply, cooperate air outlet pipe natural exhaust, form efficient air circulation system, effectively solve the hypoxia problem caused by ventilation in electric power well is not smooth, guarantee the safety of overhauling personnel operation.

This invention discloses a transmission gear shaft for a planting tray conveying system, belonging to the technical field of transportation equipment. It aims to solve the problems of noise generated by gear disk displacement under force and gear disk corrosion caused by condensation. The transmission gear shaft includes a central shaft, a first spacer, a second spacer, a gear disk, and a hollow shaft. The first and second spacers are fixed to the central shaft, which can limit the displacement of the gear disk under force and reduce noise. The first spacer, the second spacer, and the through holes on the gear disk are coaxial. The clearance fit between the hollow shaft and the central shaft forms an air duct. After the air duct is connected to a fan, it can accelerate the evaporation of condensation on the surface of the central shaft, prevent corrosion at the connection between the gear disk and the central shaft, extend the service life of components, and ensure the stable operation of the planting tray conveying system.

An adjusting valve of the ventilation water tank comprises a front end tooth groove, a main body is a plate-shaped structure with a shaft and a valve tail end, and the circular plate-shaped structure with the shaft is matched with the cross section of a ventilation pipe in size. A ventilation pipe penetrates through the top of the water tank main body; a shell is fixed to one side face of the ventilation pipe, a front end tooth groove is formed in the shell, an adjusting handle is arranged outside the shell, and the adjusting handle is fixedly connected with the front end tooth groove. Bearing seats are fixed on the opposite side surfaces of the ventilation pipe, and are internally and rotatably connected with the valve tail end; a sliding groove is formed in the shell, a bolt is slidably connected into the sliding groove, and the front end of the bolt is inserted into the front end tooth groove to limit the rotation angle of the adjusting valve. A filter box is installed on the top of the ventilation pipe in a penetrating mode, an exhaust fan is arranged in the filter box, and a filter mechanism capable of being rapidly replaced is arranged above the exhaust fan. The ventilation requirements in different use scenes can be met by adjusting the rotating angle of the adjusting valve, the practicability and flexibility of ventilation of the water tank are improved, and the ventilation air volume can be accurately controlled.

The utility model discloses a prefabricated foundation of power equipment ventilation, damp -proof reduces condensation, relates to power equipment technical field, mainly solves the problem of power equipment foundation ventilation damp -proof, including bearing platform, the prefabricated structure of bearing platform top and the power equipment of prefabricated structure top, the lateral surface of prefabricated structure and power equipment junction place symmetry has opened a plurality of air vents, and every air vent all is provided with filter screen and variable ventilation mechanism, and variable ventilation mechanism sets up in the inside of air vent, damp -proof condensing mechanism, horizontal fixed assembly in the inside wall of prefabricated structure.

The utility model relates to the field of ventilators, in particular to an anti-bird device for a downslope ventilator and the downslope ventilator with the anti-bird device. The anti-bird device is mounted on the ventilator framework; the anti-bird device comprises an anti-bird mechanism arranged on the ventilator framework, and the anti-bird mechanism comprises an anti-bird net arranged on the lateral ventilation opening; each anti-bird net comprises a plurality of single nets arranged on the ventilator framework; each single net comprises a net body frame, and a steel net layer is arranged on the net body frame; through the arrangement of the bird preventing device, the ventilation efficiency can be guaranteed, meanwhile, birds can be effectively prevented from entering the ventilator, the birds are prevented from nesting, inhabiting and excreting in the ventilator, and damage to the ventilator and the internal structure of a roof is reduced; the anti-bird net disclosed by the utility model is formed by splicing a plurality of single nets, so that the problem that a traditional integral anti-bird net is easy to interfere with a ventilator framework during installation can be reduced or avoided.

The utility model discloses a kind of finned tube heat transfer enhancement structure for waste heat recovery device, it is related to finned tube technical field, including heat exchange bin, the inside fixed mounting of heat exchange bin has finned tube main body, finned tube main body includes liquid conduit and several radiating fins, the inside of radiating fin is equipped with several through holes, liquid conduit is sequentially penetrated in the through hole of several radiating fins inside, the side of heat exchange bin inner wall is fixedly connected with several airflow baffles in linear arrangement mode, one end of several airflow baffles is respectively arranged between two adjacent radiating fins.The utility model changes the flow direction of high-temperature gas by the setting of airflow baffle, forms turbulent flow, reduces flow rate, prolongs the residence time of airflow, promotes gas and radiating fin to contact fully, enhances the convection heat transfer of this finned tube.

The utility model discloses a terminal box for an industrial television, which relates to the technical field of terminal boxes and comprises a terminal box body, a box door is hinged to the front end of the terminal box body, a handle is arranged at the front end of the box door and is designed in an embedded mode, an installation plate is fixedly connected to the inner wall of the terminal box body, and the installation plate is fixedly connected with the terminal box body. The terminal box comprises a mounting plate, two air inlet assemblies are arranged on the inner side of the mounting plate, a vertical plate is fixedly connected to the upper end of the mounting plate, and a plurality of placement plates are fixedly connected to the outer side of the vertical plate. When the equipment runs, air enters a plurality of placing grids formed by the vertical plate and the plurality of placing plates through the air inlet barrel and the vent holes in the placing plates, so that heat generated by the operation of the equipment is taken away through the flowing of the air, and then the heat is exhausted from the air outlet to form air circulation, so that the heat dissipation and cooling of the internal equipment are realized, and the normal operation of the equipment at a proper temperature is ensured.