43results about How to "Achieve ventilation effect" patented technology

The invention discloses a power distribution cabinet with a temperature adjusting function, and relates to the field of power distribution cabinet heat dissipation, the power distribution cabinet with the temperature adjusting function comprises an equipment frame, a square frame fixedly penetrates through the top of the equipment frame, and the power distribution cabinet further comprises a moving device; wherein the moving device comprises a fixed frame, a ventilation plate, a fan, a rotating rod, a circular plate, a rotating plate, a sleeve, a supporting rod, a sliding block, a U-shaped plate, a fixed block, a connecting plate, a moving plate, a connecting block, a bearing block, a square block and a filtering plate, the fixed frame is slidably installed in the square frame, and the ventilation plate is fixedly installed in the fixed frame. According to the power distribution cabinet with the temperature adjusting function, the ventilation effect is achieved by opening the ventilation opening, the situation that the interior of equipment is overheated, and consequently the equipment cannot operate normally is prevented, the humidity in the cabinet can be reduced through good ventilation, meanwhile, the area of the ventilation opening is increased along with increase of the rotating speed of the internal fan, and self-adaptive adjustment can be conducted according to changes of the temperature in the cabinet.

The utility model provides a photovoltaic glass curtain wall device which comprises a longitudinal supporting frame and a transverse supporting frame which are installed on the outer side of a wall body, an outer frame is connected inside the longitudinal supporting frame and the transverse supporting frame in a sliding mode, a glass assembly is fixedly connected inside the outer frame, one side of the longitudinal supporting frame is fixedly connected with a second electric lead screw, and the other side of the longitudinal supporting frame is fixedly connected with a third electric lead screw. The movable end of the second electric lead screw is in threaded connection with a cleaning sliding block, one end of the cleaning sliding block is slidably connected with a supporting plate, one end of the supporting plate is fixedly connected with an air blowing opening and a water spraying opening, one end of the supporting plate is fixedly connected with a shovel plate and a scraper, and the cleaning sliding block and one end of the supporting plate are fixedly connected with a second spring. After the outer frame moves inwards, the second electric lead screw drives the supporting plate to move downwards through the cleaning sliding block, dust and dirt are removed through water spraying and air spraying, dirt can be shoveled and water stains can be scraped through the shoveling plate and the scraping plate, timed automatic cleaning is achieved, cleaning by external workers is not needed, and the safety risk is reduced.

The invention relates to the technical field of workshops, and discloses an assembly type heavy steel frame workshop structure and a construction method thereof.The assembly type heavy steel frame workshop structure comprises a roof truss installed on a foundation; four roof beams which are symmetrically distributed in pairs are installed at the top end of the roof truss through high-strength bolts, a connecting beam is installed between every two symmetrically-arranged roof beams through high-strength bolts, and supporting beams are installed at the bottom ends of the two connecting beams and the top end of the roof truss through high-strength bolts; the inner walls of every two roof beams located on the same side are connected with a main roof plate through high-strength bolts, by arranging a driving mechanism and a movable mechanism, the top of the plant can be rapidly opened, in summer, indoor ventilation and heat dissipation can be achieved through natural wind, the indoor air quality can be improved, and the temperature and humidity can be reduced; natural light can be utilized to the maximum extent for illumination, and the lighting efficiency is improved.

The utility model relates to the technical field of alarm devices, in particular to an alarm and ventilation linkage type smoke alarm device which comprises an installation frame, a fixing plate is installed in the installation frame, a ventilation fan is installed in the fixing plate, a rotating column is installed on the inner side wall of the installation frame in an inserted mode, and a shielding plate is installed on the outer surface of the rotating column. And the bidirectional motor is installed on the back face of the rotating column, the bidirectional motor is arranged in the mounting frame, a rotating shaft is installed at the output end of the back face of the bidirectional motor, and a stabilizing ring is fixedly connected to the outer surface of the rotating shaft. The rotating shaft can drive the stabilizing ring and the connecting plate to rotate, so that the connecting plate can drive the knocking block to abut against the left side surface of the metal alarm plate, the metal alarm plate can make a sound, an alarm can be automatically given out, meanwhile, the ventilation fan is started, air in the indoor environment is pumped out through the ventilation fan, and the indoor environment is protected. Therefore, the effects of ventilation and alarm can be achieved simultaneously.

The utility model discloses a novel tea placing frame device and relates to the technical field of tea placing. According to the technical scheme, the drying device comprises a box body, a drying mechanism is arranged on one side of the box body and comprises a suction fan, the suction fan is installed above the side face of the box body, an air suction pipe is installed at the input end of the suction fan, and the air inlet end of the air suction pipe is connected with the interior of the box body; an air suction pipe communicated with an inner cavity of the air suction pipe is installed in the middle of the air suction pipe, a vacuum layer is arranged in the box body and communicated with the box body through the air suction pipe, and a one-way valve is installed on the outer wall of the air suction pipe. The suction fan is arranged on one side of the tea placing frame, air in the vacuum layer is sucked away through the suction pipe, the interior is in a vacuum state, and therefore the heat insulation effect is achieved. The air suction pipe guides cold air into the heating machine and guides heat flow into the box body, so that the tea leaves are in a dry environment, and the tea leaves are prevented from being affected with damp and mildewed.

The utility model relates to the technical field of mine ventilation, in particular to an air door for mine ventilation, which comprises a frame for supporting and a door plate arranged in the frame, the frame comprises a body, a driver is arranged at the top of the body, a transmission structure is arranged on the opposite side of the body, the driver is matched with the transmission structure, and the door plate is arranged in the body. The transmission structure rotates under the control; the transmission structure is combined with the door plate and used for controlling opening and closing of the door plate. Through the combination of the frame and the door plate and the cooperation of the ventilation opening and the electrostatic integration rod arranged on the door plate, dust can be treated when the door plate is not opened; and after the door plate is opened through the driver and the transmission structure, the ventilation effect can be smoothly achieved, at the moment, the door plate is turned over, air can pass through the arranged air channel after the door plate is turned over, dust particles in the air can be collected through an electrostatic dust collection rod arranged in the air channel, and the requirement for air purification is met.

An external fan air supply device for a range hood and a ventilation pipeline is composed of an air supply device, a fan, a pipeline and a sealing connecting piece. The air supply device is an innovative core component and can be made of metal or non-metal materials through machining or injection molding and other processes and equipment. The air supply device is simultaneously connected with the fan arranged outside the pipeline and the smoke exhaust pipeline or the ventilation pipeline of the range hood, the flow guide structure is guided through the air supply device during working, airflow needing to be exhausted or conveyed is sucked and guided out, and therefore the oil smoke exhaust or ventilation effect is achieved. Therefore, the problems that the fan is arranged in the range hood or the ventilating duct, oil dirt and dust are prone to being accumulated, potential safety hazards of fire safety electricity utilization are caused, and cleaning and maintenance are inconvenient are solved, and meanwhile the effective space and gas passing ability in the range hood and the ventilating duct are improved. The safety, the practicability and the application scene universality of the method can generate remarkable economic benefits.

The invention provides coastal area tree pruning equipment capable of preventing wind damage, which comprises a pruning assembly, and the pruning assembly comprises a support, a rotating table, a telescopic arm, a mounting frame, a laser scanner, a high-definition camera, a supporting rod, a connecting rod, a fixed rod, a first motor, a bidirectional screw rod, a fixed holding arm, a second motor, a gear, a saw arm and a rack; the top of the support is rotationally connected with a rotating table, and a telescopic arm is installed at the top of the rotating table. Overall scanning of trees and arrangement and collection of data are achieved through the laser scanner and the camera, a computer software system is used for processing the scanned data to form a digital model, the effects of the trees before and after pruning are combed through software in combination with wind speed and wind direction parameters and PHOENICS wind simulation, an optimal pruning scheme is formed, and the pruning efficiency of the trees is improved. A vehicle-mounted control system is used for controlling pruning equipment, automatic pruning of trees is achieved, pruning efficiency is improved, proper wind tunnels and wind-resistant tunnels are formed, and wind resistance of the trees in coastal areas is improved.

The medical cushion for reducing the pressure sores is simple in design structure, the oval leather sleeves are sequentially expanded, the body of a patient is massaged through the massage balls, air is blown through the air holes, the purposes of massage and ventilation are achieved, the pressure sores of the body of the patient can be reduced, the pressure sores of the body of the patient can be reduced, the multiple structures can be detached and cleaned, use is flexible and convenient, and the medical cushion is suitable for popularization and application. The medical cushion comprises a medical cushion body, the medical cushion body is divided into a lower cushion piece and an upper cushion piece, the upper cushion piece can be opened when a zipper is opened, the same zipper is arranged on the four edges of the lower cushion piece and the four edges of the upper cushion piece, a plurality of air holes are formed in the upper cushion piece, and an air-permeable massage structure used for massage and ventilation is arranged on the lower cushion piece. The breathable massage structure is located between the lower gasket and the upper gasket, a control structure is connected to the breathable massage structure, the inner sides of the lower gasket and the upper gasket are both made of leather materials, and cotton cloth materials are arranged on the outer sides of the leather materials.

This utility model relates to a double-sided opening U-shaped ventilation device, including a front vertical frame, a rear vertical frame, and a mounting frame. Two front and two rear vertical frames are each installed within a curtain wall. Tempered glass is installed between the inner sides of the two front vertical frames. The front vertical frames are connected to the rear vertical frames via the mounting frame, forming a U-shaped structure. A perforated lightweight metal plate is installed on the inner side of the mounting frame, and a window sash is rotatably connected to the outer side of the mounting frame. In this design, because the window sash is located inside the curtain wall on an inner floor, it serves to prevent falls from heights. The lightweight metal plate is secured to the inner side of the mounting frame, and its outer surface is uniformly perforated. When the window sash is opened, airflow exchange between the inside and outside is achieved for ventilation.

The utility model provides a building environment regulation and control system, a multi-radiation tail end unit comprises a top plate radiation tail end module, a wall surface radiation tail end module and a floor radiation tail end module, a heat pump unit comprises a buffer water tank and a heat pump host, and a primary side water return pipeline between the buffer water tank and the heat pump host is provided with a three-way switching valve; on one hand, a multi-dimensional and large-area radiation heat exchange network structure is formed by integrating the top plate, the wall and the ground, an extremely uniform, stable and dead-corner-free indoor temperature field can be built, the problems that a traditional convection air conditioner is not uniform in cold and heat and air blowing feelings exist are solved, and the problem that application of a single radiation surface is limited is solved; and on the other hand, the sky radiation refrigeration unit is integrated, so that the sky radiation refrigeration unit can be switched with the radiation heat exchange network structure, free cold sources in nature are utilized, a heat pump can be greatly replaced or assisted for refrigeration under proper meteorological conditions, and the energy consumption of building regulation and control in the refrigeration season is reduced.

The utility model discloses an anti-freezing device for a cooling tower coil, and relates to the technical field of cooling towers, the anti-freezing device comprises a cooling tower shell and a device frame installed on one side of the cooling tower shell, a rotating rod rotatably connected with the device frame is arranged on one side of the top end of the device frame in a penetrating mode, and a plurality of shielding pieces are arranged on the device frame. A first rotating shaft is installed in the middle of the bottom of each shielding piece, a second rotating shaft is installed in the middle of the top end of each shielding piece, the top end of each second rotating shaft extends into the device frame and is provided with a worm wheel, and a plurality of worms matched with the worm wheels are installed on the rotating rod. According to the designed shielding pieces, the influence of external cold air on a coil pipe in the cooling tower can be reduced when the temperature is low, the shielding pieces can be rotated and inclined when the temperature is high, gaps are formed between the shielding pieces, external air can flow into a shell of the cooling tower, and the ventilation effect can be achieved while anti-freezing is achieved.

The utility model provides a kind of poultry feed storage box, belong to feed storage technical field, this poultry feed storage box includes feed tank ontology;Double lid, two double lids are equipped, two double lids are all rotated and are connected in the upper end of feed tank ontology by pivot;Mildew-proof mechanism, two groups are equipped in mildew-proof mechanism, and each group of mildew-proof mechanism includes ventilation placing groove, closed air placing groove, limit sliding slot, rotating shaft, ventilation sliding slot, closed air cover and air hole, limit sliding slot and limit sliding block are equipped with two, ventilation placing groove is opened in the upper end of double lid, effectively realize the ventilation and sealing conversion of feed, this design can be adjusted flexibly according to weather condition, ensure that feed is not prone to mildew in humid environment.

The invention discloses an indoor intelligent cattle shed for breeding plateau yaks based on solar energy, which relates to the field of yak breeding and comprises: a plurality of breeding units, each of which is provided with a plurality of detection units, identification units and heating units; a control unit is used for controlling the opening quantity and ventilation direction of ventilation units based on humidity information and air quality information of an environment corresponding to the breeding unit, and for controlling the start and stop and heating power of the heating unit based on temperature information of an environment corresponding to the breeding unit and age information of yaks in the breeding unit; an intelligent recognition unit is used for performing feature recognition on image information of a cow's head, obtaining physiological features of the cow's head, judging whether the yaks in the breeding unit are sick based on the physiological features of the cow's head and the body temperature information of the yaks, and generating alarm information if the yaks in the breeding unit are sick. The invention intelligently realizes temperature and ventilation control of the cattle shed, and intelligently realizes early warning of yak illness, thereby improving the breeding effect of plateau yaks.

The invention discloses an air purification device, air treatment equipment and a control method and device thereof. The air purification device comprises an air guide plate, the air guide plate is provided with a plurality of ventilation holes, and a catalyst is arranged on the windward side of the air guide plate; and the energy source is arranged opposite to the air guide plate and arranged to be capable of being powered on to generate purification substances, and the purification substances are arranged to be capable of achieving the synergistic effect with the catalyst for air purification. According to the scheme, the peculiar smell in the space can be effectively removed, consumables do not need to be replaced regularly, a compressor does not need to be started for refrigeration and heating operation, the use cost of a user is reduced, and the use experience of the user is improved; and air purification can be carried out in the process that the air treatment equipment operates in other modes, air purification can also be carried out when the air treatment equipment is not in the working state, the full-time air purification function of the air treatment equipment can be conveniently achieved, and the requirement of the air purification mode for the state of the air treatment equipment is lowered.

The present invention relates to a ventilation device, and in particular to a safe ventilation device for indoor use in high-rise buildings with wind power generation. The present invention provides a safe ventilation device for indoor use in high-rise buildings with wind power generation, which is firmly installed and can fully utilize wind resources to achieve environmental protection effects. A safe ventilation device for indoor use in high-rise buildings with wind power generation, including a frame, a support block, a drive motor, fan blades, and a mounting block, etc. A support block is provided on the right side of the frame, a drive motor is provided on the support block, and a fan blade capable of pumping air into the room is connected to the output shaft of the drive motor, and a mounting block is connected to the right side of the frame through a threaded connection. The wind blows the blades to rotate, causing the generator to work and generate electricity, which is then stored in a battery, which can power the motor to cause the fan blades to rotate and pump fresh air into the room through the air outlet pipe, thereby achieving a ventilation effect, and the method of using wind resources to generate electricity is more environmentally friendly.

The invention relates to a solar ventilation wall which comprises light-transmitting glass, a first ventilation opening, a second ventilation opening, a heavy wall, a third ventilation opening, a fourth ventilation opening and a heat insulation plate, air in an outer air channel formed by arranging the light-transmitting glass and the heavy wall at intervals can be heated through irradiation of sunlight, and therefore in a first working mode, the light-transmitting glass and the heavy wall can be heated; by means of the structure, cold air in the outdoor environment and hot air in the outer air channel form circulation so that heat on the heavy wall can be taken away, heat insulation can be achieved, circulation of the hot air in the outer air channel and air in the indoor environment can be promoted, and ventilation of the indoor environment can be achieved. And in the second working mode, circulation of hot air in the outer air channel and air in the indoor environment can be promoted, and therefore ventilation and heat insulation of the indoor environment are achieved.

The piggery environment control device comprises a piggery, an air conditioner all-in-one machine is installed outside the piggery, a wet film evaporator is arranged at the top of the air conditioner all-in-one machine, an air supply pipe is connected into an air outlet of the wet film evaporator, and the air supply pipe is suspended in the piggery; a plurality of radiation refrigeration breast board systems are arranged in the hog house, an exhaust duct is arranged under the ground of the hog house, and an exhaust fan used for exhausting air is arranged in the exhaust duct. The hog house has the advantages of low energy consumption, high operation efficiency, small ventilation amount, good air quality, small odor emission amount, relatively low operation cost and the like, and the purposes of low energy consumption and efficient environment control of the hog house are achieved.

The present invention discloses a ventilation and rescue system and a construction method suitable for a mountain highway tunnel group, wherein the ventilation and rescue system comprises a platform bridge, an exhaust duct and an air supply duct; the platform bridge is used to connect the main line bridges on both sides, and the upper end surface of the platform bridge is provided with a containing structure, the containing structure comprises an upper space and a lower space, the lower space is used for traffic conversion and road rescue passage, and the upper space is provided with a plurality of fans; the exhaust duct is used to connect the fan and the upstream tunnel; the air supply duct is used to connect the fan and the downstream tunnel. The system of the present invention avoids the problem of setting up an underground fan room, a traffic conversion zone in the cave, and the cross-flow of polluted air between the upstream tunnel and the downstream tunnel, and can not only realize tunnel ventilation and rescue, but also has the advantages of small project scale, low construction risk, and low cost investment.

The invention provides a tunnel positive pressure exhaust type rapid dust fall ventilation device, and belongs to the technical field of tunnel engineering. The tunnel positive pressure air exhaust type rapid dust falling ventilation device comprises a walking assembly, a dust falling assembly and an air pipeline. The sensing element is used for sensing the surrounding environment of the walking assembly; the atomizer is used for atomizing stored liquid, and a mist exhaust port of the atomizer is communicated with an atomizing flow guide pipe; a draught fan is in butt joint with the position between the rear end of the front air pipe and the front end of the rear air pipe. A traditional out-hole fan fixing device is converted into an in-hole movable device, and the purposes of dust falling and ventilation of a working face can be achieved more quickly; the sensing technology is applied to monitor the sanitary environment index in the tunnel in real time, and the fan is automatically sensed and controlled to operate to improve the working environment in the tunnel; rapid dust fall and ventilation of a working face can be achieved, the construction environment of the working face is monitored in real time, workers always work in a healthy environment, and the occurrence probability of occupational diseases is reduced.

The utility model relates to the technical field of bee breeding equipment, specifically relates to a foamed honey box, including the box of foamed material and the cover of the cover body on the top of box, be equipped with the stepped window on the lateral wall of box, the stepped window is constituted by outer window, inner window and connecting portion, outer window detachable connection cover plate, the gauze screen component of detachable connection covering inner window is established in the inside of box, still be equipped with the ventilation opening and the honeycomb mouth in the box, the filter screen is established in the inside of ventilation opening, the outside is equipped with the adjusting part of adjustable air volume, the utility model has the advantages of foamed material lightweight, low cost, the good advantage of heat preservation, through the cover plate, gauze and adjusting part of the ventilation opening place setting of stepped window, realize the flexible adjustment of ventilation and heat preservation state, the design of stepped window avoids the weakening of the local structure strength of box due to the window opening, effectively prevent the deformation or damage of window place, improve the durability of honey box, be applicable to the bee breeding, and the practicality is strong.

The utility model provides an office chair with ventilation function, which is used to solve the technical problem that dust is easy to accumulate in the ventilation hole of the sitting plate of the existing office chair with ventilation function, and the dust is blown out from the ventilation hole along with the airflow when the office chair is turned on, affecting the health of the user. The utility model discloses an office chair with ventilation function, which comprises a sitting plate, chair legs arranged at the bottom of the sitting plate, baffle plates arranged between the chair legs and the front and rear parts of the sitting plate, a cavity arranged in the sitting plate, an air inlet hole arranged at the bottom of the sitting plate, an air outlet hole arranged at the top of the sitting plate, the air inlet hole and the air outlet hole being communicated with the cavity, and a blower assembly arranged in the cavity of the sitting plate.

The utility model relates to the technical field of airport taxiway lamps, in particular to an airport taxiway lamp which comprises a lamp barrel shell, a lamp box is communicated and fixed to the top of the lamp barrel shell, a circuit board is fixedly installed in the lamp box, a bulb is detachably installed on the outer side of the circuit board, a first lamp cover or a second lamp cover is detachably fixed to the outer side of the lamp box, and the lamp cover is fixedly connected with the lamp barrel shell. Two symmetrically-distributed prisms are fixedly embedded into the outer side of the second lamp cover, and a heat dissipation mechanism is detachably fixed between the lamp barrel shell and the lamp box. According to the boundary lamp, the first cooling fins and the second cooling fins are fixed between the lamp barrel shell and the lamp box of the boundary lamp, the first cooling fins and the second cooling fins can transmit heat generated in the working process of the lamp out, meanwhile, the outer sides of the first cooling fins and the second cooling fins are rotationally sleeved with the air cap structures, and therefore the heat generated in the working process of the lamp can be dissipated out. And the wind pressure can push the wind cap structure to rotate and generate airflow, so that the effect of ventilating the heat dissipation mechanism is achieved, and the heat dissipation effect of the taxiway lamp is further improved.

The invention belongs to the technical field of electric communication transmission, particularly relates to an anti-electromagnetic interference power line coupler and a use method thereof, and aims to overcome the defects that in the prior art, the anti-electromagnetic interference capability of a coupler used at present is limited, and the current coupler cannot be stably supported during installation. According to the invention, after the coupler is clamped on the supporting cover, the coupler can be stably supported, mounted and limited, and after the coupler is mounted, the angle of the coupler can be adjusted according to the trend of a power line on site, so that the coupler can be stably mounted and limited, and the mounting efficiency of the coupler is improved. According to the coupler, the grounding effect is achieved, certain convenience can be provided when the coupler is electrically connected with a power line, the anti-electromagnetic interference capacity of the coupler can be improved through the grounding effect, and therefore the coupler has good stability in actual use.

The utility model belongs to the technical field of chemical equipment, and particularly relates to a ventilation device for chemical safety, which solves the problems of poor ventilation effect and easiness in blockage of an air port in the prior art and comprises a bottom plate, a right concave wheel is rotatably mounted at the top of the bottom plate, and a left concave wheel is rotatably mounted on one side of the right concave wheel. The right concave wheel and the left concave wheel are covered with a belt, a first fixing block is installed on the belt, and a right duplex sliding block is fixedly connected to the upper portion of the first fixing block. Through arrangement of a motor, a first limiting rod and other structures, the device is driven by the motor, so that the right concave wheel and the left concave wheel rotate, and then the belt is driven to rotate; therefore, the ventilation effect of the ventilation device is achieved, the air bag in the hoop can be extruded and contracted along with movement of the device, the hoop can be tightly fixed to the ventilation device, and the ventilation effect is further improved.

The utility model relates to the field of space structure design and constructional engineering design, in particular to an indoor and outdoor ventilation duct structure. According to the technical scheme, the ventilation structure comprises a ventilation groove formed in the edge of the design position of a building body, the ventilation groove is concavely arranged downwards from the ground, part of the ventilation groove is located on the outdoor side, and the other part of the ventilation groove is located on the indoor side; a plurality of rigid connection column feet are arranged along the trend of the ventilation slot at intervals; each shutter opening and closing device is arranged between every two adjacent rigid connection column feet, and the shutter opening and closing devices can control whether the indoor side parts and the outdoor side parts of the ventilation grooves are communicated or not. The energy-saving and environment-friendly greenhouse has the advantages that by means of the chimney effect, hot air in the greenhouse flows upwards in summer and is discharged outdoors through the openable window, meanwhile, outdoor air enters the greenhouse through the ventilation grooves, the ventilation effect is achieved while indoor heat is taken away, an air conditioner is not adopted in summer, and the purposes of energy conservation and environment protection are achieved. Meanwhile, the ventilation structure is hidden, a large number of windows are prevented from being formed in the curtain wall, the overall effect of the building facade curtain wall is guaranteed, and meanwhile energy conservation and emission reduction are achieved.

The grape planting greenhouse comprises a greenhouse body, a storage box is arranged on one side of the greenhouse body, a conveying pipe is arranged at the upper end of the storage box in a penetrating mode, a water pump is arranged in the middle of the conveying pipe, and the other end of the conveying pipe penetrates through the greenhouse body and is inwards provided with a spray head. A supporting frame is fixedly connected to the conveying pipe, the upper end of the supporting frame is fixedly connected with the greenhouse body, and a deinsectization lamp is fixedly connected to the upper end of the inner side of the greenhouse body. Meanwhile, the deinsectization lamps are arranged in the greenhouse, so that double deinsectization operation can be achieved, and the pest control effect of the whole planting greenhouse is improved.

The invention discloses a green building energy-saving ventilation structure which further comprises a ventilation assembly arranged above a window frame, and the ventilation assembly is in the following two states: in the open state, the ventilation assembly is opened and communicates the indoor space with the outdoor space; in the closed state, the ventilation assembly is closed, and indoor and outdoor ventilation is blocked; a handle and a transmission assembly are arranged on the opening and closing window, and the transmission assembly is in transmission connection with the handle; the ventilation assembly comprises a ventilation shell detachably installed in the window frame, a rotating plate is further rotationally arranged in the ventilation shell, a plurality of baffles capable of being opened and closed are rotationally arranged on the rotating plate, and when the handle is rotated, the baffles are driven to be opened or closed through the transmission assembly. According to the energy-saving ventilation structure of the green building, the effect of communication or blocking of outdoor air and indoor air can be achieved as required without opening a window, namely, the ventilation effect can be achieved, circulation of the indoor air and the outdoor air can be achieved, and the functionality of the ventilation structure is greatly improved.

The present invention belongs to the field of tunnel construction auxiliary systems, and specifically discloses a ventilation and dust reduction method for long-distance relay in tunnels. A ventilation and dust reduction system is used, and the system includes an air supply device, a relay air device, an exhaust device, a mobile dust removal vehicle, and three wind curtain devices arranged in sequence from the middle of the tunnel to the construction work surface of the tunnel excavation; the two wind curtain devices arranged in the middle of the tunnel are combined with the tunnel to form a relay air chamber, and a dust removal air chamber is formed between the wind curtain device close to the construction work surface and the construction work surface; the present invention provides sufficient fresh air for the relay air device through the internal circulation of air in the relay air chamber to relay air supply to the construction work surface; and through the wind curtain device of the dust removal air chamber, the dust and harmful gases at the construction work surface are retained in the dust removal air chamber for dust removal and pollution reduction treatment. The system achieves the purposes of ventilation and dust removal at the same time, and can be adjusted as the tunnel is excavated, and is particularly suitable for ventilation and dust reduction treatment during single-head excavation of long and large tunnels.

The present invention discloses a highly flame-retardant steel fireproof door with ventilation function, and relates to the technical field of fireproof doors. The present invention includes a door panel, a smoke sensor, a control box, a controller, and an electric baffle; the electric baffle is slidably matched with the inside of the door panel; an installation cavity is opened inside the door panel; ventilation holes are symmetrically opened on both sides of the inner wall of the installation cavity; a socket is arranged on an inner side of the installation cavity; the electric baffle includes an electric telescopic rod and a smoke-proof baffle; the electric telescopic rod is plugged and matched with the smoke-proof baffle. The present invention transmits an alarm signal to the controller through the smoke sensor, realizes the control of the telescopic movement of the electric telescopic rod by the control box, drives the smoke-proof baffle to block the ventilation hole, and at this time, the socket is inserted into the plug, and the bidirectional motor is energized to drive the annular brush plate to rotate and clean the dust on the surface of the ventilation plate; when the alarm is lifted, the smoke sensor transmits a non-alarm signal to the controller, and controls the electric telescopic rod to pull the smoke-proof baffle away from the ventilation hole.