60results about How to "Adjust ventilation" patented technology

The invention discloses an atomization dosing device integrated in a breathing machine pipeline, and relates to the technical field of medical instruments. The device comprises a mixed gas supply pipeand a medicine supply pipe; fixing plates are fixed in the mixed gas supply pipe side by side; an adjusting notch is formed in the side wall of the mixed gas supply pipe; an adjusting plate is rotationally connected between the two fixing plates through a connecting column; vent holes are circumferentially arrayed in the side surfaces of the two fixed plates; the connecting column is provided with an atomization hole, and the two ends of the atomization hole penetrate through the fixing plates.; the medicine supply pipe corresponds to the atomization hole in position; adjusting holes corresponding to the vent holes are formed in the side surface of the adjusting plate; and shifting rods in clearance fit with the adjusting notches are fixed to the peripheral side face of the adjusting plate. The adjusting plate is rotated to adjust the gas amount, so that the particle size of atomized liquid drops is adjusted, and the purpose that the particle size of the atomized liquid drops is uniform and controllable is achieved.

The invention relates to a comprehensive utilization method for tail gas of a regeneration charcoal kiln. The comprehensive utilization method comprises a waste charcoal drying procedure and a carbonization activation procedure. According to the comprehensive utilization method, tail gas produced in the carbonization activation procedure directly flows back to the waste charcoal drying procedure and is secondarily utilized, and waste charcoal is dried by virtue of heat in the tail gas, and meanwhile, dust in the tail gas can be further adsorbed by virtue of raw material waste charcoal, so thatthe flow of an activated carbon regeneration process can be shortened, the production efficiency can be improved, the equipment investment and maintenance costs can be lowered, the energy consumptionand the tail gas treatment cost can be saved, the comprehensive utilization method has a relative energy-saving effect and is environmentally friendly, and particularly, the tail gas of the regeneration charcoal kiln can be relatively efficiently and comprehensively utilized.

The invention discloses a smart illumination control system for artificial cultivation of dendrobium candidum, which comprises a cultivating greenhouse, dendrobium candidum seedlings, a spraying device, a temperature sensor, a humidity sensor and a ventilator on the cultivating greenhouse, wherein the seedlings are planted in the cultivating greenhouse, and the spraying device, the temperature sensor and the humidity sensor are arranged in the cultivating greenhouse. The smart illumination control system for artificial cultivation dendrobium candidum is characterized by further comprising LED seedling growth illuminating devices, an illumination instrument, a control device and an upper computer, wherein the LED seedling growth illuminating devices are hung above each seedling of the dendrobium candidum, and the illumination instrument, the control device and the upper computer are arranged on the roof of the cultivating greenhouse. The temperature sensor, the humidity sensor and the illumination instrument are connected with a signal acquiring port of the control device, the spraying device, the ventilator and the LED seedling growth illuminating device are connected with a control port of the control device, and the control device is connected with the upper computer. The LED seedling growth illuminating device comprises an LED lamp panel, a plurality of 620nm monochromatic red LED spotlights and a plurality of 460nm monochromatic blue LED spotlights, wherein the 620nm monochromatic red LED spotlights and the 460nm monochromatic blue LED spotlights are installed on the LED lamp panel, and the number ratio thereof is 3:1. The smart illumination control system can increase yield of dendrobium candidum effectively.

The invention discloses an environment-friendly biomass particle forging furnace. The environment-friendly biomass particle forging furnace comprises an automatic feeding device, a forging furnace cavity shell, a combustion furnace body and an exhaust smoke filtering device. The automatic feeding device is arranged in front of the forging furnace cavity shell. The combustion furnace body is arranged on the side edge of the forging furnace cavity shell. The exhaust smoke filtering device is arranged behind the forging furnace cavity shell. An exhaust pipe of the exhaust smoke filtering device is fixed to the forging furnace cavity shell and is communicated with an exhaust through hole in the forging furnace cavity shell. The environment-friendly biomass particle forging furnace can carry out automatic feeding, ash formed by waste generated by forge pieces can be left in an ash collecting through groove, and the ash is removed in the non-shutdown state. Meanwhile, ash and waste generated by fuel can be prevented from blocking a circulation hole, and the combusting and heating effects are guaranteed. Particle scrap filtering is carried out on the combusted smoke firstly, then the combusted smoke enters a water tank to be filtered again, accordingly, not too many scraps or particles are accumulated in the water tank, the service life is prolonged, and frequent water changing or cleaning is not needed.

The invention discloses a device for regulating distances between seedling grippers of a rice transplanter. The device comprises a seedling gripper main frame and a seedling gripper assembly, the seedling gripper main frame has a substantially reverse U-shaped structure, the seedling gripper assembly is connected between two side boards of the seedling gripper main frame through a gripper lockingcylinder, the gripper locking cylinder runs through base boards of the seedling gripper assembly, fixed seedling grippers and movable seedling grippers are symmetrically arranged on the seedling gripper assembly, positions, located at two sides of each base board, of the gripper locking cylinder are separately and symmetrically provided with a limit sleeve ring in a sleeving manner, a protective rubber flap is installed on each corresponding inner side surface of the fixed seedling grippers and the movable seedling grippers, the top end of each fixed seedling gripper is provided with a north pole of a magnet, and the top end of each movable seedling gripper corresponding to the top end of one corresponding fixed seedling gripper is provided with a south pole of a magnet, each fixed seedling gripper is fixedly installed on one end of the outer surface of one base board through a flange board, the bottom end of each movable seedling stripper is connected with an embedded sleeve plate through a hinge, each embedded sleeve plate is connected with one corresponding base board, and each flange board is connected with one corresponding embedded sleeve plate through a threaded distance column, thus people can regulate the distances between the seedling grippers conveniently.

The invention provides a flower implement which is a split type flower implement. The flower implement comprises a middle planting device and a lower container. The middle planting device is arrangedon the lower container. A novel green plant cultivation flower implement is provided for overcoming the defects in the prior art. The flower implement has the advantages that the floor space is small,and the design is unique; dry space and moist space are separated, and automatic water supply is achieved through water-steam-water ecologic circulation; semi-closed or full-closed design is achieved, combination diversity is achieved, and the ornamental value is added due to the transparent design.

The invention relates to a multifunctional deodorizing water closet, which comprises a water closet main body, wherein a water tank and a water closet lid are arranged on the water closet main body; the water closet main body is arranged on a base; an aspirating ring, which is uniformly distributed with aspirating holes, is arranged in an inner cavity of the water closet main body; the aspirating ring is connected to an aspirating cavity by virtue of a connecting pipe; a supporting seat of the aspirating cavity is connected to the base, and the aspirating cavity is arranged at the back of the water closet main body; a storage box is arranged on the front side of the water closet main body; a perfume bag is arranged in the storage box; pin rollers are arranged on the front side of the water tank; the pin rollers are arranged in parallel and are rotatably connected to the sidewall of the water tank; a first heating plate is arranged on the inner wall of the water tank; a waterproof membrane is attached on the outer wall of the first heating plate; a massaging plate is hinged at the front end of the bottom of the water closet main body; a massaging bump and fastener bumps are arranged on the upper surface of the massaging plate; a fastener groove is formed in the front side of the water closet main body; an inner cavity is formed in the massaging plate; a second heating plate is arranged in the inner cavity; and a gear controller is arranged on the back side of the water closet main body.

The invention relates to a corrosive granular waste carbon regeneration method which is as follows: first drying corrosive granular waste carbon, and then carbonizing and activating the corrosive granular waste carbon by using a carbon activating integrated rotary kiln to obtain a regenerated activated carbon product; using a corrosion-resistant exhaust gas collection tower for collecting and drying high-temperature exhaust gas generated by the carbon activating integrated rotary kiln, sending the high-temperature exhaust gas into a second combustion chamber for combustion treatment, and sequentially performing heat recovery, neutralization treatment, dioxin absorption treatment, dust removal treatment and lye spray treatment on the combusted high-temperature exhaust gas to facilitate theharmless treatment of the high temperature exhaust gas. The method is a set of scheme mainly designed for regenerative production of the corrosive granular waste carbon, and the method comprises the regenerative processing of the corrosive granular waste carbon and the harmless tail gas treatment, the process flow is configured reasonably, and energy in the process flow is efficiently used, production efficiency is high, and the method helps an enterprise to improve the capacity of regeneration of the corrosive granular waste carbon.

The invention discloses a ventilation adjustable animal husbandry veterinary epidemic prevention isolation device, and relates to the technical field of epidemic prevention isolation devices, the device comprises an isolation box, the two side surfaces of the isolation box are provided with inspection box doors, and the top surface of the isolation box is provided with two ventilation fans; under the action of the ventilation mechanism, the opening and closing degree of the ventilation holes in the side face of the ventilation window can be adjusted by controlling the telescopic degree of the electric telescopic rod, and it is guaranteed that the ventilation strength in the isolation box can be adjusted; the ventilation effect in the isolation box is more efficient under the action of two ventilation fans on the top surface of the isolation box, two guardrail plates can be adjusted under the action of an adjusting mechanism, animals in the isolation box can be clamped and fixed, the animals in the isolation box are treated through an inspection box door, and the treatment efficiency is improved. It is guaranteed that the animals do not move in the treatment process, and the stability of the animals during treatment is guaranteed.

The invention belongs to the field of livestock breeding and in particular relates to a high-altitude mountainous area yak feeding system which comprises a cow house, wherein at least two layers of roofs which are arched upwards are arranged at the top of the cow house; ventilation skylights are arranged in the middles of the roofs in a through manner; ventilation cabins are arranged on the skylights; cross sections of the ventilation cabins are arched upwards on the skylights; both ends of arches are in communicated ventilation. By adopting the feeding system and a method for feeding yaks, the death rate of the yaks in winter can be effectively reduced, the yak delivery time can be shortened, and the meat quality of the yaks can be improved.

A ventilation section bar is provided with a ventilation channel provided with an indoor air port and an outdoor air port, an electric fan is installed in the ventilation channel, and when the electric fan is started, air indoors and outdoors can be enabled to ventilate. The ventilation section bar has the advantages of being capable of achieving initiative strengthening of indoor and outdoor air convection.

The invention provides an energy-saving and ventilating type green building house, and belongs to the technical field of energy-saving and environment-friendly buildings, which solves the problems ofpoor ventilation effect and inconvenient adjustment in existing building houses. The energy-saving and ventilating type green building house comprises a house body, the house body is provided with a plurality of main windows that can slide open, auxiliary windows are arranged in the main windows, the right ends of the auxiliary windows are hinged and fixed with the main windows, each auxiliary window is of a structure that swings with a hinged shaft with the corresponding main window as the axis, the auxiliary windows are provided with circular through holes, blocking devices of the through holes are arranged at the front ends of the auxiliary windows, and the blocking devices are of structures that open or close as the auxiliary windows swing.

The invention relates to a convenient-adjustment air-suction pedestal pan with a storage function. The convenient-adjustment air-suction pedestal pan comprises a toilet body, wherein the toilet body is provided with a water tank and a toilet lid; the toilet body is arranged on a base; an inner cavity of the toilet body is provided with an air absorption ring in which air absorption holes are uniformly formed; the air absorption ring is connected with an air absorption cavity by virtue of a connecting pipe; a support base of the air absorption cavity is connected with the base; the air absorption cavity is arranged at the rear part of the toilet body; the front side of the toilet body is provided with a storage box; the storage box is provided with a swing-type box cover and internally provided with a fragrance bag; the rear side part of the toilet body is provided with a gear controller used for controlling the ventilatory capacity of the air absorption cavity; the gear controller is provided with an indication lamp; the front end of the bottom of the toilet body is articulated with a massage plate; the upper surface of the massage plate is provided with massage bulges and buckle bulges; the front side of the toilet body is provided with a buckle groove; after the massage plate is rotated, the buckle bulges are matched and buckled with the buckle groove.

The invention relates to the technical field of green plant maintenance equipment, and particularly discloses an ecological green plant maintenance device based on mine environment restoration treatment. The ecological green plant maintenance device comprises supporting rods, flexible blocking cloth, fixed rods, top blocking cloth and limiting pieces, and each supporting rod comprises a vertical rod, a lead screw and a spring, wherein the vertical rod is provided with an accommodating cavity and a through groove, and the through groove is communicated with the accommodating cavity; one end ofeach lead screw is in threaded connection with the bottom wall of the corresponding accommodating cavity, the other end of each lead screw penetrates through the top wall of the corresponding verticalrod, and each spring is arranged on the corresponding lead screw in a sleeving manner; the flexible blocking cloth is arranged between the adjacent supporting rods, and the side edges of the flexibleblocking cloth penetrate through the springs. the fixed rods are arranged between the adjacent supporting rods, and hooks are arranged on the fixing rods; fixing nails are arranged at the bottom endsof the supporting rods; and the limiting pieces are used for limiting the springs to the specific positions on the lead screws. According to the ecological green plant maintenance device based on mine environment restoration and treatment, the size of a ventilation opening can be adjusted in a targeted manner at any time according to the requirements of vegetation, the ventilation amount is effectively controlled, meanwhile, the heat preservation and protection effects are achieved, and the normal growth requirements of the vegetation are met.

The invention relates to the technical field of rail traffic platform doors and discloses a rail traffic roller-shutter-type adjustable ventilating platform door. The rail traffic roller-shutter-typeadjustable ventilating platform door comprises a door frame and a shielding door fixed into the door frame, the interior of the door frame is fixedly connected with a transverse plate, the upper end of the transverse plate is fixedly connected with a mounting plate, a T-shaped sliding groove is formed in one side of the mounting plate, the interior of the T-shaped sliding groove is slidably connected with a T-shaped sliding block, one end of the T-shaped sliding block is fixedly connected with a transverse rod, the upper end of the transverse rod is fixedly connected with a roller shutter cloth, the upper end of the roller shutter cloth is fixedly connected with the inner wall of the upper end of the door frame, a strip-shaped through hole is formed in one side of the mounting plate, the interior of the strip-shaped through hole is slidably connected with a connecting block, and one end of the connecting block penetrates through the strip-shaped through hole and is fixedly connected with the T-shaped sliding block. According to the rail traffic roller-shutter-type adjustable ventilating platform door, the ventilating amount of a ventilating opening in the platform door can be adjusted, piston wind generated during train traveling is reduced, air intercommunication between a tunnel and a platform can be achieved, and the temperature in the tunnel is decreased advantageously.

The invention discloses an evaporative air supply humidity adjusting device for a textile workshop. The evaporative air supply humidity adjusting device comprises an air pipe, an inner air flue, air collection plates, a folding connecting frame and humidification plates. The fixed frame is arranged on the outer side of the air pipe, and an air inlet is arranged on one side of the air pipe. The inner air flue is arranged on the inner side of the air pipe, and connecting rotating shafts are arranged at the left end and the right end of the inner air flue. The air collection plates are arranged in the middle of the inner air flue and are rotationally connected with the air pipe through the connecting rotating shafts. The folding connecting frame is arranged on the inner side of the air collection plate, and an embedded connecting frame is arranged in the middle of the folding connecting frame. The humidification plates are arranged in the middle of the embedded connecting frame. The textile workshop and the outdoors are connected through the air pipe, air is input through outside natural air or naturally through workshop negative pressure, the air collection plates symmetrically arranged in the inner air flue can adjust the air input quantity, the air speed and the temperature by rotationally adjusting the angle and the distance, the multiple humidification plates are arranged between the air collection plates in parallel, the air collection plates can drive the humidification plates to achieve synchronous adjusting while adjusting the angle and distance, and therefore the airinput quantity, the temperature and the humidity are adjusted synchronously, and use is more convenient and saves more energy.

The invention aims at providing an outdoor horizontal louver sunshading board which has simple structure, can not only be used for overturning a louvered fin, but also be furled by integrally moving up and down. The outdoor horizontal louver sunshading board comprises a fixed frame, the louvered fin, a connector, motors, chains, a guide rail, a lifting speed changer and an overturning speed changer, wherein the connector is used for connecting the louvered fin with the fixed frame; the guide rail is positioned on the fixed frame; the lifting speed changer and the overturning speed changer are respectively connected with the motors and the connector; the louvered fin is horizontally placed and connected with the fixed frame through the connector; the connector is fixedly connected with both ends of the louvered fin and respectively connected with the lifting speed changer and the overturning speed changer through the chains so that the louvered fin and the connector can take two actions of up-and-down movement and self rotation; the two tubular motors are respectively connected with the lifting speed changer and the overturning speed changer through the chains. According to the outdoor horizontal louver sunshading board provided by the invention, the louvered fin can integrally move up and down due to the existence of the lifting motor, and therefore sunshade, ventilation and lighting can be regulated within a larger range; and in addition, the outdoor horizontal louver sunshading board has simple structure, can not only be used for overturning the louvered fin, but also be furled by integrally moving up and down.

The invention relates to the technical field of wound adhesive bandages, and discloses an anti-infection human skin imitating painless patch for wound shielding, which comprises an adhesive bandage, an exposed groove is formed in the middle of the adhesive bandage, and the left end and the right end of the adhesive bandage are fixedly connected with a left side patch and a right side patch respectively through elastic cloth; a left soft paste and a right soft paste are arranged on the outer walls of the left side and the right side of the adhesive bandage respectively, gauze is arranged in the middles of the outer walls of the left soft paste and the right soft paste, and pasting strips are arranged on the edges of the outer walls of the left soft paste and the right soft paste. The adhesive bandage, the left side patch and the right side patch can be attached to the skin of a human body through the first patch and the second patch, after the adhesive bandage, the left side patch and the right side patch are attached, a wound is just exposed through the exposed groove, at the moment, the corresponding rectangular patch is torn down, the left soft patch or the right soft patch can cover and be attached to the adhesive bandage, and the gauze just corresponds to the exposed groove in position; and the gauze can shield, protect and treat the wound.

The invention relates to the technical field of air-conditioning plant room hosting, in particular to a remote hosting system. The remote hosting system comprises a switch; the input end of the switchis electrically connected with the output end of a mobile phone / tablet computer; the input end of the switch is electrically connected to the output end of a remote hosting monitoring center; the output end of the switch is electrically connected to the input of a host control module; the output end of the switch is electrically connected to the input end of a circulation pump control module; theoutput end of the switch is electrically connected to the input end of the energy efficiency monitor; the output end of the switch is electrically connected to the input end of a cooling tower control module. The remote hosting system can be widely applied to various places such as office buildings, hotels, shopping malls and public facilities where online monitoring of central air-conditioning systems is required, through the mobile phone / tablet computers and the remote hosting monitoring center, the central air-conditioning systems can be monitored online for 24 hours in real time, warninglines for key operating parameters are set, and the problem of system low-energy operation or damage caused by human errors is completely solved.

The invention aims to provide an outdoor vertical louver sunshade plate with simple structure and capabilities of turning over louver sheets, moving left and right and being folded. The outdoor vertical louver sunshade plate comprises a fixed frame, louver sheets, connectors for connecting the louver sheets and the fixed frame, a motor, belts, guide rails on the upper and lower sides of the fixedframe, and translation transmissions and a turnover transmission connected with the motor and the connectors. The fixed frame is a skeleton. The louver sheets are arranged vertically and connected with the fixed frame through the connectors, the connected positions are on the guide rails of the upper and lower sides of the fixed frame, the connectors are fixedly connected with the two ends of thelouver sheets, and the connectors are connected with the translation transmissions and the turnover transmission through the belts respectively. The main translation transmission drives the two secondary translation transmissions to rotate, so that vertical synchronization is achieved; and the secondary translation transmissions drive the louver sheet connectors to move left and right, so that the purpose of unfolding or folding the louver sheets is fulfilled. The turnover transmission controls the rotation of the louver sheet connectors so as to fulfill the purpose of turning over the louversheets.

The invention discloses an anti-backflow oxygen humidifying device for pneumology departments, and particularly relates to the field of oxygen humidification for pneumology departments. The device comprises a box body; a water treatment chamber and a gas treatment chamber are respectively and fixedly arranged on two sides of the inside of the box body; a mixing chamber, a storage chamber and an adjusting mechanism are arranged between the water treatment chamber and the gas treatment chamber; the storage chamber is positioned at the top of the mixing chamber; the adjusting mechanism is positioned between the mixing chamber and the storage chamber; a drainage mechanism and an exhaust mechanism are respectively and fixedly arranged on two sides of the inside of the mixing chamber, wherein the drainage mechanism and the exhaust mechanism are arranged correspondingly; a water storage box is fixedly arranged on the top of the inside of the water treatment chamber; and a first water storagemetering box, a second water storage metering box, a third water storage metering box and a first mounting box are fixedly arranged at the bottom end of the inside of the water treatment chamber. According to the invention, through arrangement of the water treatment chamber and the gas treatment chamber, new oxygen supply and water supply sources can be provided in each treatment stage, and oxygenand water are effectively prevented from being polluted due to backflow.

The invention discloses production equipment for multi-material-weight and multi-specification glass bottles, and belongs to the technical field of glass machinery. Which comprises a feeding machine and a bottle-making machine, and is characterized in that the feeding machine comprises a servo punching mechanism and a servo shearing mechanism which are sequentially arranged and are respectively driven by a servo motor; a prototype mold vertical cold air nozzle or a full one-way air nozzle is arranged at the prototype mold, inlets of the prototype mold vertical cold air nozzle and the full one-way air nozzle are connected with an outlet of a flux-adjustable air door switch valve, and a cooling air inlet switch mechanism is arranged at the outlet of the air door switch valve; a servo bottle shifting mechanism driven by a servo motor is arranged in a bottle conveying machine of the bottle making machine. According to the production equipment for the multi-material-weight and multi-specification glass bottles, the execution mechanisms driven by the servo motors are arranged, so that parameters can be conveniently set according to specific products, the glass bottles with different material weights and different specifications can be produced by one set of production equipment at the same time, the mold cost is saved, and the production efficiency is improved. And the efficient production of small-batch and multi-variety glass bottles is met.

The invention relates to an intelligent monitoring device and system and a control method. The device comprises a sensor module used for obtaining environmental parameters in a hatching vehicle; a control module used for controlling the sensor module to acquire environmental parameters; a gateway used for carrying out edge calculation; the control module is electrically connected with the sensor module and used for controlling the sensor module to collect environmental parameters; and the gateway is in communication connection with the control module and is used for obtaining the environmentalparameters obtained by the control module, obtaining the change rule of the environmental parameters and obtaining the estimated hatching time of the hatching eggs in the hatching vehicle according to the change rule of the environmental parameters. The environment parameters in the chick outlet vehicle can be monitored, then data analysis can be conducted on the environment parameters, the change rule of all environment indexes in the chick outlet peak period is analyzed, and the change rule serves as the decision basis for judging when chicks are pulled out of the chick outlet device. According to the invention, the environment data in the hatching vehicle can be accurately monitored, so that the environment in the hatching vehicle can be adjusted more reasonably.

The invention relates to the technical field of plastic packaging boxes, specifically a plastic packaging box, including a plastic box, a top cover, a collision mechanism, a first pull rod, a second pull rod, a stop rod, a rotating shaft, a telescopic spring, a slide rod, and a fixed shaft , card slot and adjustment mechanism. In the present invention, by pulling the two stop rods, the distance between the second pull rod and the second pull rod is stretched under the action of the slide rod and the telescopic spring, and when it is rotated to a certain position, the slots on one side of the two stop rods are aligned. The corners at both ends of the top of the push rod are removed, and the pulling force is removed, so that the first pull rod and the second pull rod shrink under the action of the telescopic spring, so that the inside of the card slot on one side of the two stop rods is in contact with the top corner of the top cover, so that Two blocking rods lock the top cover to prevent easy opening or falling off. Under the action of two sets of first and second rods, it is beneficial to close and support the plastic box, which plays the role of anti-drop and compression resistance. The function of the regulating mechanism is conducive to regulating the ventilation inside the plastic box.

The invention discloses a gas alternating system which comprises a valve body, a fixed core pressing ring and valve needles, wherein the valve body is arranged on an installing seat, a cavity is arranged in the valve body, the cavity penetrates through the valve body, one end of the cavity is provided with a valve seat, the side wall of the cavity is communicated with an air outlet, and the other end of the cavity is fixed with the fixed core pressing ring; the fixed core pressing ring is fixed with a pressing cap, the fixed core pressing ring and the pressing cap are hollow, and the hollow areas are communicated with an air inlet; and the valve needles are arranged in the hollow areas of the fixed core pressing ring and the pressing cap, one ends of the valve needles are provided with a pressure driving device, and the other ends of the valve needles are connected with the valve seat. According to the gas alternating system, through changing the pressures exerted on the valve needles, the valve needles drive a valve core to generate different displacements so as to control the flow rates of gas paths in the valve needles and the valve seat, thereby realizing the adjustment on ventilation volume according to actual conditions.

The invention relates to the technical field of valves, in particular to a power distribution check valve and a range hood. The power distribution check valve comprises a ventilating valve body, a hose and a linked component. The hose comprises a rotary segment and a fixed segment. The ventilating valve body is provided with a transparent cavity. The fixed segment is fixedly connected into the transparent cavity. The rotary segment is fixedly connected with the linked component. The linked component is used for driving the rotary segment to rotate relative to the fixed segment, so that the twisted deformation occurs between the rotary segment and the fixed segment, and therefore, the size of an opening of the hose in the twisted deformation area is adjusted. The range hood comprises the power distribution check valve. According to the power distribution check valve and the range hood provided by the invention, the amount of passing air can be adjusted, in addition, the sealing effect is good under a complete closed condition, and the power distribution check valve has a good lampblack odor tainting preventing effect after being mounted in an air pipe of the range hood.

The invention discloses an engine lower guard plate for a pickup truck, comprising a guard plate main body fixedly mounted on the bottom of the engine, the guard plate main body comprising a fixed part and a movable part, the movable part comprising a bottom backing plate, One end of the bottom backing plate is fixedly provided with an extended connection portion, the other end of the bottom backing plate is fixedly connected with a windward sloping plate, the fixing part includes a fitting connecting plate, and one side of the fitting connecting plate is connected to the windward One side of the inclined plate is in close contact with each other, and both sides of the top of the bottom backing plate are fixedly connected with flanging plates, and one side of the two flanging plates is fixedly installed with a fastening connection unit; the bottom backing plate A cooling mechanism is fixedly installed on the top of the extended connection part, and a snap-fit ​​connection unit is fixedly installed on the top of the extension connection part; the engine lower guard plate for a pickup truck provided by the present invention has good heat dissipation and ventilation, and is flexible and convenient to install and disassemble. The working life of the engine improves the safety.