38results about How to "Improve suction efficiency" patented technology

The invention provides an air source heat pump system. The air source heat pump system comprises a compressor, a fin heat exchanger, a shell tube heat exchanger and a gas-liquid separator, wherein the shell tube heat exchanger comprises a gas tube, a liquid tube, a heat exchange tube and a liquid separating device, the air source heat pump system further comprises a four-way valve, the four-way valve is correspondingly communication with the compressor, the gas-liquid separator, the fin heat exchanger and the gas pipe, the fin heat exchanger is in communication with the liquid separating device through a orifice plate and a first one-way valve; the fin heat exchanger is in communication with the liquid tube through an expansion valve and a second one-way valve; the first one-way valve is used for the one-way conduction of the fin heat exchanger to the liquid separating device; the second one-way valve is used for the one-way conduction of the liquid pipe to the fin heat exchanger. By the adoption of the system, a liquid storage device of the liquid refrigerant does not need to be added in the system, so that the cost is saved; a large amount of liquid refrigerant cannot flow back to the compressor after defrosting is finished; during the refrigeration mode, the refrigerant running shell pass does not need to be subjected to suction superheat, so that the air suction pressure and the operation efficiency of the refrigeration mode are improved; and the overall use valve of the system is less, and the reliability is high.

The application discloses an underground pipeline water flushing detection machine, which comprises a main unit and a handheld working unit; the handheld working unit comprises a holding part and a working long pipe; the holding part is provided with a switching cavity and a switching handle; one side of the switching cavity is provided with a mud interface and a water interface; the mud interface is connected with a suction inlet through a first hose; the water interface is connected with a water outlet through a second hose; the other side of the switching cavity is communicated with the working long pipe; a sealing block which can be rotated to block the mud interface and the water interface is arranged in the switching cavity; the sealing block is connected with the switching handle; the underground pipeline water flushing detection machine can flush and suck the underground pipeline in the detection hole for multiple times through the single working long pipe; the switching between the sucking and the flushing can flush the impurities adhered or retained in the working long pipe, so that the mud sucking efficiency is improved.

The application discloses a high-efficiency thrombus taking device, which comprises a catheter, the catheter comprises a catheter main body and an expandable distal end with a diameter expandable structure arranged at the distal end of the catheter main body, the expandable distal end is fixedly connected with the distal end of the catheter main body, a constriction elastic element and a traction wire for controlling self-expansion of the expandable distal end or compression of the expandable distal end are arranged on the expandable distal end, the proximal end of the constriction elastic element is fixedly connected with the distal end of the catheter main body, the constriction elastic element is sleeved outside the expandable distal end, and the constriction elastic element can press the expandable distal end and make the expandable distal end be constricted in the constriction elastic element in a natural state, the catheter main body is only needed to realize transportation of the expandable distal end and self-expansion of the expandable distal end or compression of the expandable distal end, the thickness of the catheter is reduced, the thrombus can be conveniently cleaned, the pumping efficiency can be effectively improved, and the device is suitable for various blood vessels with different diameters.

The utility model relates to the field of slurry wall protection drilling, especially relates to a slurry separation tank for reverse circulation drilling machine, including primary sedimentation tank, secondary sedimentation tank, residue storage tank, slurry input pipe, sand separating mechanism and slurry output pipe, secondary sedimentation tank is connected with primary sedimentation tank, residue storage tank is connected with secondary sedimentation tank, and the lateral wall of primary sedimentation tank is provided with overflow, and overflow is communicated with secondary sedimentation tank, slurry input pipe is connected with primary sedimentation tank, and slurry input pipe is used for injecting slurry to primary sedimentation tank, sand separating mechanism is connected with secondary sedimentation tank, and sand separating mechanism is communicated with residue storage tank, slurry output pipe is communicated with secondary sedimentation tank, and the sludge suction efficiency in secondary sedimentation tank is increased by setting conical fairing on the circulating pipeline, the slurry that is extracted from pile foundation hole is discharged into primary sedimentation tank through slurry input pipe and carries out preliminary deposition, the slurry after preliminary deposition enters secondary sedimentation tank through overflow, and the drilling residue of smaller particle is removed by slurry through sand separating mechanism.

This utility model discloses a material suction device and a material suction system. The material suction device includes a suction pipe and a support frame. The suction pipe has a suction port and a discharge port at its two ends, respectively. The support frame is disposed on the outer wall of the suction pipe and surrounds the perimeter of the suction port. The support frame is used to open the bag opening of the material bag and form a suction space communicating with the suction port at the bag opening. At least one arc-shaped chamfer is provided at the end of the support frame away from the discharge port. A first guide slope is also provided at the end of the support frame away from the discharge port. The support frame includes a first connecting surface and a second connecting surface arranged opposite each other along the radial direction of the suction pipe. The first guide slope is connected to the first connecting surface and / or the second connecting surface by an arc-shaped chamfer. The first guide slope is inclined towards the central axis of the suction pipe from the discharge port to the suction port, thereby preventing the support frame from obstructing the suction port and improving the material conveying effect and efficiency.

The invention relates to the technical field of medical instruments, and discloses an anti-hypoxia sputum suction catheter which comprises an oxygen uptake catheter and a sputum suction catheter assembly arranged in the oxygen uptake catheter in a penetrating mode, the right end of the oxygen uptake catheter and the right end of the sputum suction catheter assembly are communicated with a three-way pipe, and the periphery of the three-way pipe is fixedly connected with a fixing shell. The left end of the three-way pipe is fixedly connected with a check valve, the right end of the three-way pipe is communicated with a branch pipe and a connecting pipe, the tail end of the connecting pipe is provided with a pneumatic pump, and the middle of the pneumatic pump is fixedly connected with an adjusting valve. By means of the coaxial double-tube structure and the three-way tube shunt design, continuous oxygen supply is kept while the sputum aspirator goes deep into an airway for sputum aspiration, suffocation of a patient is effectively prevented, accurate adjustment and visual monitoring of negative pressure are achieved by means of the pneumatic pump assembly integrating the adjusting valve and the display screen, and the safety and efficiency of sputum aspiration operation are remarkably improved.

The utility model discloses a ceramic product polishing device with a cleaning function, which comprises a pedestal, a polishing mechanism is arranged on one side of the top of the pedestal, the ceramic product polishing device with the cleaning function further comprises a connecting seat, and the connecting seat is fixedly mounted on the back of the polishing mechanism. According to the scheme, before the ceramic is polished through the polishing mechanism, the absorption cavities horizontally deflect around the mounting column so that the absorption cavities can be located on the two sides of the ceramic, then the ceramic placed on the table top of the table base is polished through the polishing mechanism, and meanwhile the draught fan arranged at the top of the connecting base is started; according to the grinding device, the supporting frame at the top of the grinding device is separated from the surface of the collecting bin, and after the fixing column moves by the maximum distance, the collecting bin can be horizontally moved out of the connecting base so that dust collected in the collecting bin can be treated in a unified mode, and therefore grinding dust can be cleared away in time, and the influence of the dust on the surrounding environment and equipment is avoided; and the practicability of the device is improved.

The utility model discloses an air purifier belongs to air purification equipment technical field. It includes: air inlet pipe and air outlet pipe, both upside down and connect, and both the top surface, bottom surface of air purifier structure formed after connecting are closed surface, the top surface of air outlet pipe is provided with the communicating port, and the inner chamber of air inlet pipe is communicated with the air outlet pipe through the communicating port, the circumferential side wall of air inlet pipe is provided with a plurality of air inlet face, and every air inlet face is provided with air inlet, the air outlet face is formed on the opposite setting two sides of air outlet pipe respectively, and every air outlet face is provided with air outlet, the filter screen is set in air inlet pipe and covers in communicating port. Set up air inlet and air outlet on every side wall of air inlet pipe and air outlet pipe respectively, can handle the air in larger range fast, realizes the uniform suction and high -efficient discharge of air, effectively promotes the air circulation times in unit time, thereby significantly enhances purification efficiency.

This utility model discloses a coarse-grid odor extraction structure, including a sewage tank with vents circumferentially arranged on its inner wall; and a extraction assembly, disposed on the outside of the sewage tank and including multiple first extraction parts, each connected to a corresponding vent to extract odor. This utility model solves the problems of low odor treatment efficiency and the inability to prevent water vapor escape from existing sewage odor extraction equipment, which poses safety hazards. By coordinating vents within the sewage tank with the extraction assembly, odor and water vapor are pre-treated, preventing odor from spreading to a larger space, reducing extraction efficiency, and increasing effort; and preventing water vapor from escaping and corroding various equipment, thus improving the safety of odor treatment.

The utility model discloses a PVC calcium powder vacuum suction machine, and belongs to the technical field of vacuum suction devices. The PVC calcium powder vacuum suction machine comprises a suction tank, a tank cover is connected to the suction tank, a vacuum pump connected with the tank cover is fixedly connected to the suction tank, a feeding pipe and a discharging port are arranged on the suction tank, and the PVC calcium powder vacuum suction machine further comprises a filter screen arranged in the tank cover; the rotating shaft is rotationally connected into the tank cover, multiple sets of rotating rods are connected to one end of the rotating shaft in an up-down sliding mode, multiple sets of bristles are connected to the rotating rods, and the bristles are attached to the filter screen; the fan blades are fixedly connected to the rotating shaft; through the arrangement of the fan blades, the bristles and other components, when the device is used, the filter screen can be automatically cleaned, calcium powder is prevented from blocking the filter screen, the material suction efficiency is improved, meanwhile, through the arrangement of the knocking assembly, the filter screen can be effectively vibrated, adsorbed PVC calcium powder particles are shaken off, and it is guaranteed that the filter screen is smooth.

The utility model discloses an air treatment device, air treatment device includes host computer, air duct subassembly, deflector subassembly and movable plate, and air duct subassembly is rotatably connected with host computer, and host computer passes through air duct subassembly and is extracted to the air treatment cavity inside it and is extracted, and deflector subassembly sets up in air duct subassembly and is used for guiding the air current to the air intake of air duct subassembly, and the movable plate is telescopically arranged in deflector subassembly, and the movable plate at least partial edge keeps with the host computer surface elastic abutment. Air treatment device is provided with rotatable air duct subassembly, to satisfy the air suction demand of different directions, and is provided with deflector subassembly simultaneously, expands the air suction range of air duct subassembly, and the deflector is provided with telescopic movable plate simultaneously, thereby avoids the interference between air duct subassembly and host computer in the process of rotating.

The application discloses a cooling system liquid supplement tool, which is suitable for supplementing cooling liquid for a cooling system by a cooling liquid tank. The cooling system liquid supplement tool comprises a liquid supplement pump, a pipeline set, a sub-pump and a current controller. The liquid supplement pump has a liquid inlet. The pipeline set comprises a first pipeline and a second pipeline. The first pipeline is suitable for connecting the liquid inlet of the liquid supplement pump and the cooling liquid tank. The second pipeline is suitable for connecting the first pipeline and the cooling liquid tank. The sub-pump is arranged in the second pipeline and is suitable for driving the fluid in the second pipeline to flow. The current controller is electrically connected with the sub-pump and is used for providing operating power for the sub-pump and controlling the operating time of the sub-pump. The application can automatically supplement the cooling liquid without human intervention or additional controller intervention. In addition, most of the air in the pipeline set can be discharged before entering the inside of the cooling system, so that the subsequent pumping and flowing efficiency of the cooling liquid is improved.

The utility model provides a durable anti-blocking material suction pipe, which belongs to the technical field of negative pressure conveying and comprises a material suction pipe inner pipe used for conveying materials, and an anti-blocking structure for preventing the materials from being accumulated is arranged at a top outlet of the material suction pipe inner pipe. The material suction pipe outer pipe is connected to the upper part of the material suction pipe inner pipe; the square-to-round connecting pipe is used for providing a larger space for materials and reducing the airflow speed so as to reduce the scouring of the materials to the wear-resistant elbow, and the square-to-round connecting pipe is arranged above the outer pipe of the material suction pipe and is connected with the outer pipe of the material suction pipe; the material suction device is compact in structure, high in interchangeability, long in service life, stable in operation, high in material suction efficiency and capable of reducing energy consumption, labor intensity of workers and cost.

A mixed-flow ventilation fan includes a base plate and a panel that snaps onto it. An exhaust pipe is connected to the rear of the base plate. An air inlet is provided on the panel, communicating with the exhaust pipe on the base plate. A motor mount is connected to the inner wall of the exhaust pipe via several guide vanes. The motor mount is fixed to the central axis of the exhaust pipe by the guide vanes. A drive motor is installed inside the motor mount, and a front fan blade is mounted on the main shaft of the drive motor. The front fan blade rotates inside the exhaust pipe, drawing in air from the air inlet and expelling it from the rear of the exhaust pipe. The beneficial effects of this invention are: the front fan blade is a mixed-flow fan blade, and combined with an optimized number of blades and a reasonable design of the inclination angle, curvature, and angle of attack of the inner and outer edges of the blades, the blades can efficiently perform work on the air during rotation, generating excellent airflow characteristics that balance large air volume and high air pressure.

The application belongs to the technical field of municipal engineering, and particularly relates to a sludge treatment device and method for municipal engineering, which comprises a sludge treatment box, a first purification cavity and a second purification cavity are arranged on the inner side of the sludge treatment box, the first purification cavity and the second purification cavity are communicated, an equipment cavity is arranged on the top of the inner side of the sludge treatment box, a deodorizer and a reagent cylinder are fixedly arranged on the inner side of the equipment cavity, a purple light lamp is arranged on the top of the inner side of the second purification cavity, a plurality of first electric guide rails are arranged on the inner side of the second purification cavity, a first sliding seat is slidably arranged on the first electric guide rail, and a first loading plate is fixedly installed on the first sliding seat. In the sludge cleaning process in the urban pipe network, the sludge is separated into solid and liquid on site, the purified water is used as recycled water, and the water resource can be recycled, so that the sewage in the sludge does not affect the ecological environment.

The application provides a built-in motor cleaning tool floor brush, comprising a floor brush base, a suction motor assembly is installed on the floor brush base, a wind guide cavity in communication with the outside is arranged in the floor brush base, the suction motor assembly comprises a suction motor, a motor seat is arranged on the floor brush base, the suction motor is fixed on the motor seat, air inlets are symmetrically arranged on the two sides of the motor seat, and the air inlets are in communication with the wind guide cavity; the suction motor sucks the outside air into the wind guide cavity and discharges the outside air from the floor brush base. The built-in motor cleaning tool floor brush provided by the application is characterized in that the suction motor can be connected to the air duct openings on the two sides of the sewage cavity through the air inlets and the wind guide cavity, thereby being connected to the outside of the rolling brush through the sewage cavity and the sewage channel, the suction motor and the wind guide cavity are arranged in the floor brush, the air flow distance is shorter than that of the existing dust collector, the suction efficiency is improved, the motor does not need to be installed on the handle, the overall weight is lower, and the floor brush is convenient to use.

This utility model discloses an automatic fume extraction welding machine, including a welding head, a fume extraction assembly, and a fume extraction pipe. The fume extraction assembly achieves efficient airflow acceleration through magnetic drive of a vortex impeller and an excitation assembly. The cooperation of a fixed-rotation ring and a shaft sleeve guides the airflow and accelerates fume emission. A grid ring and a heat-insulating kit further improve fume filtration efficiency, ensuring effective removal of harmful substances from welding fumes. This utility model, by employing vortex impeller and magnetic drive technology, not only improves the fume extraction effect but also significantly reduces energy consumption and noise, offering advantages such as high efficiency, energy saving, and environmental friendliness. Simultaneously, it simplifies the equipment structure, facilitating cleaning and maintenance, and is suitable for various welding operations, especially in environments with strict requirements for welding fume extraction.

The invention discloses welding equipment for aluminum alloy battery box machining, and relates to the technical field of welding. The welding equipment for aluminum alloy battery box machining comprises a base, a protection box is fixedly installed at the top of the base, a box door is hinged to the outer wall of the protection box, an observation window is embedded in the box door, a supporting frame is further fixedly connected to the top of the base, and a workpiece rotating mechanism is fixedly installed at the top of the supporting frame; a workpiece clamping and positioning mechanism is arranged on the top of the workpiece rotating mechanism, and a welding mechanical arm is installed on the top of the base. And an exhaust fan and an air blower are arranged on the outer wall of the top of the base and located on the two sides of the protection box correspondingly, and the outer wall of the top of the base is fixedly connected with a filter box. By means of a composite dust removal mechanism integrating blowing guide, negative pressure suction and low-position secondary collection, smoke dust and splash generated in the welding process can be actively captured and removed, and therefore the dust removal efficiency is remarkably improved.

The utility model provides a compressor zero pressure difference suction check valve relates to compressor valve technical field, and valve plate assembly is in valve body and cooperates sealing pad sealed suction passage, reset spring acts on valve plate and provides the pre -tightening force of making it reset, still include drive assembly and guide air pipeline, drive assembly assembly is in valve body upper end, and drive assembly includes cylinder liner, drive piston and push rod, cylinder liner is fixed with valve body, drive piston sets up in the cylinder liner inside to form cylinder cavity with the slidable, push rod upper end is connected in drive piston, and lower end acts on the upper end surface of valve plate, guide air pipeline is connected cylinder cavity with the exhaust end of compressor, is used for introducing the high pressure exhaust of compressor into cylinder cavity as drive power source, when compressor operation, high pressure exhaust enters cylinder cavity through guide air pipeline, drives drive piston and drives push rod down, initiatively overcomes the pre -tightening resistance of reset spring and drives valve plate to open, realizes zero pressure difference suction conduction.

The present application belongs to the technical field of kitchen appliances, and particularly relates to an oil screen device and a range hood. The present application aims to solve the problem of poor suction effect of the existing range hood on oil fume. The range hood of the present application comprises a shell and an oil screen device, the shell is provided with an air inlet, and the oil screen device is arranged at the air inlet. The oil screen device comprises a first oil screen assembly, a second oil screen assembly and a driving device arranged between the first oil screen assembly and the second oil screen assembly. The driving device is used to drive the first inner screen body to move in a direction away from the second oil screen assembly, and the driving device is also used to drive the second inner screen body to move in a direction away from the first oil screen assembly. Through the above arrangement, the oil screen assembly corresponding to the closed state of the cooking head is closed, the suction force of the range hood is concentrated on the oil screen assembly corresponding to the cooking head in the open state, and air only enters the shell from the oil screen assembly corresponding to the cooking head in the open state, thereby improving the suction efficiency of the range hood.

The invention discloses an efficient anaerobic sewage treatment device, and particularly relates to the technical field of sewage treatment.The efficient anaerobic sewage treatment device comprises a tank body, a tank cover is arranged at the top of the tank body, and a left partition plate and a right partition plate are arranged in the tank body; the inner space of the tank body is sequentially divided into a precipitation separation tank, an anaerobic tank and a biological filter tank from left to right by the left partition plate and the right partition plate, most of sludge and impurities with larger mass in sewage can be deposited at the bottom of the precipitation separation tank under the influence of gravity, and MBBR filler in the anaerobic tank is beneficial to quickly forming a biological membrane; the sewage is ensured to be in full contact with the filter material filler in the biological filter through the water guide pipe and the water distribution pipe, so that the effects of filtering and degrading the pollutants are realized, and as the liquid level difference exists between the water inlet pipe and the water outlet pipe, the whole device can realize unpowered treatment of the sewage without additionally arranging an additional power assembly; the purpose of saving energy is achieved, and meanwhile operation cost is reduced.

The invention relates to the technical field of Bluetooth sound boxes, in particular to a Bluetooth sound box with an NFC quick pairing function, which comprises a sound box main body, a suction cup is arranged at the bottom of the sound box main body, a compensation device is arranged on the sound box main body, the compensation device is communicated with the interior of the suction cup, and the compensation device is used for extracting air in the suction cup; a control device is arranged on the sound box main body, the control device controls the start and stop of the compensation device according to the storage amount of air in the suction cup, the compensation device comprises a mounting seat fixedly mounted at the bottom of the sound box main body, and the suction cup is fixedly mounted at the bottom end of the mounting seat; a mounting cavity is formed in the mounting seat, a communicating hole is formed in the outer side wall surface of the mounting seat, and the communicating hole is communicated with the mounting cavity. The placement stability of the Bluetooth sound box on the placement plane is improved, and the problem that an existing Bluetooth sound box is low in anti-skid performance and reliability is solved.

The utility model discloses an assembly type flow collecting drainage component, and belongs to the technical field of drainage. According to the assembly type flow-collecting drainage component, the plate pieces, the drainage channels and the filter pieces are arranged, so that water or steam in soil permeates into the drainage channels from the filter pieces, the water or / and gas in the soil are / is gathered together under the limitation of the plate pieces, flow-collecting drainage or / and concentrated exhaust are / is facilitated, and the assembly type flow-collecting drainage component has the advantages that the assembly type flow-collecting drainage component is simple in structure and convenient to use. And therefore, the construction time of various soft and hard soil body foundations is shortened, and popularization and application are facilitated. Furthermore, the plate sheet, the drainage channel and the filter piece are sequentially assembled together to form the assembly type flow collecting and drainage component, so that the water permeability of the filter piece can be improved, water vapor in various soft and hard soil body bases can be easily discharged, the water content in the soil body can be continuously reduced, and the strength can be continuously improved; and therefore, foundation settlement and differential settlement are gradually eliminated, and the use requirements of engineering projects such as land, maritime work and sewage environments are met.

The application provides an acute respiratory tract obstruction airway patency device, belonging to the technical field of medical treatment, comprising a connecting suction pipe, a sputum suction head and a negative pressure suction mechanism, the sputum suction head is arranged at the insertion end of the connecting suction pipe, the sputum suction head comprises a suction head front part and a suction head rear part, the suction head front part and the suction head rear part are relatively movable along the axial direction, the suction head rear part is rotationally connected with the connecting suction pipe, the negative pressure suction mechanism is arranged at the distal end of the insertion end of the connecting suction pipe, and the surface of the suction head rear part is provided with a suction hole; an elastic membrane is arranged in the suction hole, the inside of the elastic membrane is provided with a ring-shaped double-layer structure, and the opening end of the elastic membrane is fixedly connected with the inner surface of the suction hole; through the cooperation of the elastic membrane and the hole diameter control mechanism, the hole diameter of the suction hole can be automatically adjusted according to the pressure change of the suction hole, airway injury caused by negative pressure adsorption is avoided, and the technical defects that the existing airway patency device causes the suction hole to adsorb the airway wall due to sputum accumulation during sputum suction are solved.

The utility model relates to the technical field of sewage treatment, in particular to a center transmission half-bridge single-pipe suction dredger which comprises a suction dredger body, the suction dredger body comprises a pool body, a center driving device is arranged in the center of the pool body, a working bridge is arranged on one side of the center driving device, and a driving device is arranged on the other side of the working bridge. The center driving device is provided with a single-pipe mud suction arm in a matched mode, the single-pipe mud suction arm is of a hollow structure, one end of the single-pipe mud suction arm is connected with the center driving device, the single-pipe mud suction arm is driven by the center driving device to do circular motion around the center of the pool body, and the center driving device is provided with a supporting structure in a matched mode. The center driving device is provided with a single-pipe mud suction arm, a skimming assembly is arranged between the single-pipe mud suction arm and the working bridge, the center driving device is provided with a mud suction transmission device in a matched mode, the single-pipe mud suction arm is connected with a mud discharging pipe, and the mud discharging pipe is provided with a water outlet pipe in a matched mode. The sludge cleaning efficiency and the water quality treatment effect of the sedimentation tank are improved, and the modern sewage treatment requirements are met.

The flushing switching valve comprises a valve body, the valve body is provided with a switching cavity and two water outlets communicated with the switching cavity, a switching piece capable of rotating around the axial direction of the switching piece to open and close the water outlets is arranged in the switching cavity, and one water outlet is provided with a suction inlet located outside the switching cavity; the valve body is further provided with a fluid channel and a transmission cavity, the transmission cavity is formed in the axial side of the switching cavity, and a transmission piece rotating coaxially with the switching piece is arranged in the transmission cavity. The fluid channel is communicated with the suction inlet, a movable sliding piece is arranged in the fluid channel, the sliding piece and the transmission piece are oppositely arranged, and the transmission piece can be matched with the sliding piece in an abutting and pushing mode when rotating to a preset position along with the switching piece; when the switching piece rotates to open the water outlet with the suction inlet and drives the transmission piece to abut against the sliding piece, the sliding piece moves to open the fluid channel, and fluid is sucked into the suction inlet through the fluid channel. The on-off of the fluid channel is controlled through mechanical linkage, the washing effect and the bubbling function of the brush ring are both considered, the structure is simplified, and the cost is reduced.

This utility model relates to a dustbin assembly and a cleaning device, comprising a housing with an air inlet and an air outlet. A mounting base containing a filter is disposed within the housing, allowing suction airflow to be drawn into the housing through the air inlet, pass through the filter, and exit through the air outlet. A baffle is rotatably mounted on the inner side of the air inlet, and this baffle can rotate under the pressure difference between the inner and outer sides of the housing to open or close the air inlet. The mounting base and the filter are spaced apart from the baffle, allowing the baffle to rotate to fully open the air inlet without obstruction from the mounting base and the filter. Due to the gap between the baffle, the mounting base, and the filter, during the process of the baffle flipping up to open the air inlet, the filter and the mounting base do not obstruct the flipping of the baffle or cause any other form of interference, allowing the air inlet to be fully opened without obstruction of the suction airflow, thereby improving suction efficiency.

This utility model discloses a fan wheel structure and an air purifier. The fan wheel body has air inlet surfaces at both ends and two layers of air outlet surfaces on its lateral circumferential surface. Each layer consists of blades evenly distributed circumferentially, with adjacent blades forming an air outlet channel. The upper and lower blades are tilted in the same direction and staggered, so that the upper blades overlap the lower air outlet channel axially, improving airflow continuity and volume. The air purifier includes two opposing filter compartments, with an air inlet screen on the outer surface, a filter screen inside, and an air outlet screen on the side. The fan wheel body is located in the inner cavity, with its two air inlet surfaces corresponding to the filter compartments, and its air outlet surfaces facing the air outlet screens. The double-layer air outlet structure combined with the staggered blade design significantly improves air delivery capacity and efficiency; the symmetrical air inlet and outlet layout enhances the rationality of airflow organization and improves purification efficiency; the overall structure is compact, operates stably and with low noise, and is suitable for various air purification scenarios.

The utility model discloses a wind shell assembly and a table top range hood, and belongs to the technical field of range hoods. The fan cover shell is provided with a containing cavity and an air inlet hole, and the air inlet hole is used for inputting air into the containing cavity so that high pressure can be formed in the containing cavity. The first shell is provided with an air exhaust channel; the second shell is provided with an exhaust channel, and the first shell and the second shell are arranged in the containing cavity and communicate with the two opposite ends of the air cover shell correspondingly. The outer diameter of the first shell is smaller than the inner diameter of the second shell, and the first shell extends into the second shell; a first annular air outlet is formed between the part, extending into the second shell, of the first shell and the second shell, and the first annular air outlet can output air in the containing cavity towards the exhaust channel, so that negative pressure is generated at the end, far away from the exhaust channel, of the air exhaust channel to suck oil smoke and the oil smoke flows to the exhaust channel. By optimizing the design of the air duct, the oil smoke suction efficiency of the table top range hood and the user experience can be improved.

The utility model discloses a turnover range hood, which comprises a panel, a suction air duct and a rocker mechanism, the panel is of a hollow structure, the suction air duct is communicated with the panel through a connecting part, and the connecting part is rotatably arranged on the suction air duct through the rocker mechanism and drives the panel to turn over. According to the utility model, multi-angle adjustment of the panel is realized through the rocker mechanism, so that the panel can be freely overturned, the limitation of a fixed angle of a traditional range hood is broken through, dynamic directional suction is realized, and the oil fume trapping efficiency is improved. Compared with the prior art, the turnover range hood is higher in suction efficiency, better in suction effect and better in user experience.