13 results about "Passive ventilation" patented technology

The disclosed technology relates to a passive ventilation system for buildings, designed to enhance air circulation and reduce reliance on mechanical ventilation systems. The system features a hollow central column with air outlets on its outer surface to capture air from the building interior. An air nozzle within the column accelerates the airflow, directing it through an upper and lower panel that form an air passage, creating a low-pressure zone to expel air passively. The system integrates seamlessly into buildings, with a central column foundation, a base platform, and parallel floor slabs. The air outlets are strategically located between the slabs, enabling air circulation from multiple floors through the central column, which expels it to the exterior without mechanical assistance. This innovative design ensures improved thermal comfort and energy efficiency, making it ideal for use in commercial, residential, and office buildings.

The invention belongs to the technical field of tunnel ventilation and smoke discharge, and relates to a tunnel fire test device for natural ventilation and smoke discharge of an unpowered hood, which comprises a first box body, a second box body, an unpowered hood, two frequency conversion fans, a fire source combustion assembly, a smoke assembly, a detection assembly, a shooting assembly and a control assembly. A tunnel is simulated through the first box body, a vertical shaft is simulated through the second box body, tunnel wind and environment wind are simulated through the two frequency conversion fans, a fire disaster is simulated through the fire source combustion assembly, flue gas generated when the fire disaster occurs is simulated through the flue gas assembly, and the wind speed and temperature when the fire disaster occurs are detected through the detection assembly. Flame combustion and smoke flowing images are shot in real time through the shooting assembly when a fire occurs, and then the rotating speeds of the two frequency conversion fans are controlled according to the air speed, so that different pressure differences are formed inside and outside the tunnel; and the influence of ventilation and smoke discharge of the unpowered air cap on the temperature and smoke flow in the tunnel under the driving of different pressure differences is researched in cooperation with received temperature and smoke flow images.

The utility model discloses an unmanned aerial vehicle operation compartment with a lateral passive ventilation and heat dissipation structure, which relates to the technical field of thermal management technology and comprises an operation cabin main body and a storage cabin, the operation cabin body is of a closed or semi-closed structure and contains an unmanned aerial vehicle nest, the storage bin is located on the side portion of the operation cabin body and stores tool accessories, a storage bin door is arranged on the outer side wall of the storage bin, and shutter type ventilation grids which are arranged in a downward inclined mode are arranged on the outer side wall of the storage bin and / or the storage bin door. Vent holes are formed in the inner side wall between the storage bin and the operation cabin body. And air circulates among the external environment, the storage bin and the operation cabin main body through the shutter type ventilation grid and the ventilation holes, so that a natural ventilation path is formed. A unique ventilation path is constructed through the side storage bin, air exchange inside and outside the bin can be promoted, and the temperature in the bin is effectively reduced. The shutter type grating structure can effectively prevent rainwater and splashed water from directly entering the storage bin and the operation bin, and the outdoor environment adaptability is improved.

This invention provides a building exterior wall panel with an integrated passive ventilation cavity, belonging to the technical field of building exterior wall panel technology, aiming to solve the problems of poor heat dissipation in summer and poor thermal insulation in winter of traditional exterior wall panels. The panel includes a panel body composed of an exterior decorative layer, an insulation core layer, and an inner lining layer; a ventilation cavity disposed between the exterior decorative layer and the insulation core layer and distributed along the height of the panel; and a thermally actuated switch assembly disposed at the air inlet or outlet of the ventilation cavity. This switch assembly utilizes a two-way shape memory alloy actuator to automatically open or close the ventilation opening according to the ambient temperature. In hot summer weather, the ventilation opening opens, using the thermal pressure effect to form a "cooling chimney" to remove heat; in cold winter weather, the ventilation opening closes, reducing heat loss and thus improving thermal insulation. This device can adapt to the external ambient temperature and passively adjust the wall performance to reduce building energy consumption.

The application discloses a low-carbon type full-buried sewage treatment system and an operation and maintenance method, and relates to the technical field of sewage treatment. The low-carbon type full-buried sewage treatment system comprises an underground space, an unmanned operation and maintenance module, an intelligent ventilation module, an intelligent lighting module and a personnel detection module; the intelligent ventilation module comprises an air inlet shaft, an air outlet shaft, a passive ventilation assembly and an active ventilation assembly; and the intelligent lighting module comprises a passive lighting assembly and an active lighting assembly. When the underground space is unoccupied, the unmanned operation and maintenance module is used to maintain the operation of the low-carbon type full-buried sewage treatment system, the passive ventilation assembly and the passive lighting assembly are used to ventilate and light the underground space, and the system has low energy consumption; when a user enters the underground space, the active ventilation assembly and the active lighting assembly are used to enhance ventilation intensity and lighting intensity, guarantee the life safety of the user and provide a good field of view, so that the user can conveniently perform underground operation.

The utility model discloses a kind of unpowered ventilation purification devices of adjustable indoor pressure, it includes ventilation pipe, the inside fixed connection of ventilation pipe has purification filter plate and is installed with elastic switch, the surface of elastic switch is installed with baffle, the right end fixed connection of ventilation pipe has regulating valve shell, the surface of regulating valve shell is fixedly connected with defence cover by bolt.The utility model is monitored to indoor air pressure by baroceptor and signal is transmitted to controller, so that controller controls motor to open, and then motor is rotated by main rotating lever and drives branch rod one, at this time under the linkage action of connecting rod, so that branch rod two drives sub rotating lever to rotate, and then so that main rotating lever and sub rotating lever all drive valve plate to rotate, it can reach that indoor air pressure is monitored in real time by baroceptor, then air intake grille is driven to rotate moderately by motor, so that the purpose that air intake amount in ventilation pipe is adjusted to match with indoor negative pressure demand is achieved.

The application relates to the technical field of building ventilation, and relates to an energy-saving building top ventilation device, which comprises a lower support, a support sleeve is arranged at the top of the lower support, a bottom support is rotationally connected to the support sleeve, ventilation fan blades are uniformly arranged on the bottom support, the top of the ventilation fan blades is fixed on a top support, a shielding frame is rotationally connected to the top support, a blockage prevention mechanism is slidably connected to the shielding frame, and the blockage prevention mechanism is connected with a positive ventilation mechanism; the ventilation fan blades are circumferentially distributed to form a spherical ventilation structure for passive ventilation, and the positive ventilation mechanism can be used for positive ventilation when the wind speed is too low; the blockage prevention mechanism is used for preventing the gaps between the ventilation fan blades from being blocked; and the low-temperature sealing mechanism is used for automatically cutting off the ventilation pipeline when the temperature of the building is too low, so that the external cold air is prevented from invading the building, and the heat loss in the building is reduced.

Passive ventilation device (1) for a cabinet, comprising at least two L-shaped profiles, characterized in that the profiles are positioned and spaced apart from each other by at least one retaining element (1a, 1b) such that their legs overlap and form a light-impermeable, but air-permeable, multi-angled flow channel (10).

Passive ventilation system for underground structures, comprising a base that fits onto a duct, a profiled hollow box, a grille with calibrated openings to block pests, and integrated deflectors to divert precipitation. The system is designed to be manufactured as a single piece or in a modular fashion, notably by molding, injection molding, or 3D printing.

The invention discloses a curtain wall and roof integrated ventilation temporarily-built board room. The curtain wall and roof integrated ventilation temporarily-built board room comprises a board room unit, a curtain wall unit installed on the side face of the board room unit, a photovoltaic roof unit installed on the top of the board room unit and a curtain wall top cover unit connected with the curtain wall unit and the photovoltaic roof unit. The curtain wall unit and the side wall of the board room define a vertical air duct, a transverse air duct is arranged in the curtain wall top cover unit, the photovoltaic roof unit and the top face of the board room form a buffer air duct, the air ducts are communicated in sequence, and an adjusting valve is arranged at the tail end of the buffer air duct. Through the communication design of a physical structure, an integrated heat dissipation path based on the hot-pressing principle is constructed. When air is heated and rises, natural draft is formed to take away heat, passive ventilation cooling is achieved, and air conditioner energy consumption of the temporarily-built board room is effectively reduced.

This invention relates to the field of passive ventilation and heat dissipation technology for power distribution equipment, specifically to a duct partition and airflow guiding structure for passive ventilation and heat dissipation of power distribution equipment. The duct partition includes a power distribution cabinet and a multi-channel distributed ventilation and heat dissipation mechanism disposed within it. Structural columns are provided at each of the four corners of the power distribution cabinet, and a supporting base is provided at the bottom of the cabinet. The supporting base is located at the bottom of the structural columns and is bolted to them. Both the supporting base and the structural columns are hollow inside. Connecting pipes are fixedly connected to each of the four corners of the inner side of the supporting base, and the other end of each connecting pipe extends to and connects with the multi-channel distributed ventilation and heat dissipation mechanism. Several inward-pushing nozzles are fixedly connected to the inner side of the structural columns. This invention provides a duct partition and airflow guiding structure for passive ventilation and heat dissipation of power distribution equipment, which has the advantages of multi-channel distributed air intake and four-corner auxiliary air supply, improving the passive ventilation and heat dissipation effect of the power distribution equipment.

In order to solve the problems in the prior art, the utility model provides a continuous carbon dioxide supply device which comprises a shell, a passive ventilation assembly, a working module and an active ventilation assembly, wherein the passive ventilation assembly is arranged at one end of the shell; the working modules are arranged in the shell in parallel and are used for carrying out carbon capture on gas in the shell 1 to obtain the working modules subjected to carbon capture; or, heating and desorbing the working module after carbon capture to obtain carbon dioxide gas; the active ventilation assembly is arranged at the other end of the shell and is used for sucking external gas into the shell for carbon capture; or continuously discharging the carbon dioxide gas. According to the continuous carbon dioxide supply device disclosed by the utility model, carbon capture can be carried out on air, and safe, continuous and stable carbon dioxide supply is realized by utilizing a heating desorption mode.

The utility model relates to the technical field of nuclear power, and particularly discloses a passive ventilation system simulation test room, which comprises a main control room, the ventilation system is used for conveying air into the main control chamber; the indoor temperature adjusting system is used for adjusting the temperature in the master control room; the control cabinet is arranged on the master control room and electrically connected to the ventilation system and the indoor temperature adjusting system. The ventilation system comprises an ejector, a first silencer, a second silencer, a filter and a heat exchange assembly, wherein the first silencer and the second silencer communicate with the ejector, the filter communicates with the first silencer, and the heat exchange assembly is connected to the filter. One end of the second silencer is connected with a first connecting pipe, one end of the first connecting pipe is connected with a second connecting pipe through a first three-way valve, an air outlet of the second connecting pipe is formed in the main control chamber, and one end of the first silencer communicates with the first three-way valve through a third connecting pipe; an air outlet in one end of the fourth connecting pipe is formed in the master control room. The utility model has the effect of verifying the reliability of the passive cooling complete technology and equipment.