3956results about How to "Achieve sealing" patented technology

The invention provides a method for preparing a polymer microporous foaming material by supercritical mould foaming. The method comprises the following steps of: heating a foaming mould on a mould press to the foaming temperature; placing a polymer into the mould; closing the mould by using the mould press; sealing the mould; introducing supercritical fluid, which swells and diffuses to the polymer, into the mould; and opening the mould by using the mould press to release pressure and foam to obtain the polymer microporous foaming material. Compared with the prior art, the method has the advantages that: the high-temperature and high-pressure supercritical fluid is used for swelling the polymer, so the moulding cycle is greatly shortened; the limit that only microporous foaming sheet material with lesser thickness can be manufactured in the prior art is broken through, so a polymer microporous foaming plate with greater thickness can be manufactured; when the mould is opened, the pressure-releasing speed is high and the foaming pore core-forming speed is high, so the formed microporous foaming material has smaller foaming pores, higher pore density and more excellent performance; and multiple layers of moulds can be placed on one mould press, so the method is suitable for industrialized scale production.

The invention discloses a composite drive mandrel anchoring casing head and relates to the technical field of wellhead devices, the composite drive mandrel anchoring casing head comprises a casing head shell and an anchoring mandrel unit, a pressurizing hole is further formed in the side wall of the casing head shell, the first end of the pressurizing hole is connected with an anchoring hole part,and the second end of the pressurizing hole extends to the outer side of the casing head shell. The anchoring mandrel unit comprises an anchoring mandrel body, a slip exciting piece, an anchoring slip and an annular piston body, wherein the slip exciting piece, the anchoring slip and the annular piston body are sequentially arranged on the outer side of the anchoring mandrel body from top to bottom in a sleeving mode. The casing head can meet the hanging requirement of a mandrel hanger, after the anchoring mandrel body and the casing head shell are anchored, pipe column shifting can be avoided, and the stability and the reliability of the casing head are improved.

The present invention provides a flashing system for roof mounting equipment which reliably prevents water from reaching the substructure of the roof. The flashing system comprises a flashing plate having upper and lower surfaces, and at least one hole extending therethrough for receiving a fastener. A first seal is arranged at the lower surface of the flashing plate, and a second seal is arranged at the lower surface of the flashing plate surrounding the first seal, wherein the thickness of the first seal is greater than the thickness of the second seal. The thickness relation is provided when the flashing system is installed and both seals are compressed. A third seal, which receives the fastener therethrough, can be provided at the upper surface of the flashing plate.

The invention discloses a micro-strip-to-waveguide vertical transition structure achieved through multi-layer step type substrate integration waveguide. One section of multi-layer step substrate integration waveguide is adopted through the structure to achieve the vertical transition of a micro-strip and a caliber of the waveguide between the micro-strip and the caliber of the waveguide. Coupling calibers are etched among all layers of step substrate integration waveguide and between the substrate integration waveguide at the lowest layer and the caliber of the waveguide, the multi-layer substrate integration waveguide in the two plane directions is in matched connection with the single-layer micro-strip through the step structure, and the broadband performance is achieved. The novel multi-layer step substrate integration waveguide structure is adopted, the short circuit plane is omitted, the plane integration is facilitated, and especially connection between a plane circuit and a waveguide structure system is facilitated. The broadband performance is achieved by optimizing the design calculation.

The invention discloses a nonideal explosive work capacity measuring device. The device comprises a priming electrode, an explosion cavity, a bullet sliding cylinder, bullets and a velometer, wherein the inner top of the explosion cavity is provided with an explosive suspension loop; the priming electrode is internally communicated with the explosion cavity; the explosion cavity is connected with the bullet sliding cylinder and the explosion cavity and the bullet sliding cylinder are communicated; the bullets are arranged in the bullet sliding cylinder; and the velometer is arranged in the bullet sliding cylinder. According to the measuring device, the bullets and the bullet sliding cylinder are designed, and the bullet sliding cylinder is communicated with the explosion cavity, so that explosion impact shock wave energy, product expansion energy and energy released by sustained reaction are converted into kinetic energy for accelerated motion of the bullets in the bullet sliding cylinder, the velocity of the bullets flying out of an opening of the bullet sliding cylinder is measured by utilizing the velometer arranged at the tail end of the bullet sliding cylinder, and the flight kinetic energy of the ruler bullets can be calculated; according to the principle of energy transformation and conservation, the kinetic energy of the bullets is the work load of an explosive, namely the explosive work capacity.

The invention provides a disinfection and drying device for medical instruments used in medical care, which belongs to the field of medical care. It includes a spray device, a gas filter device, an electric heating rod, an ultraviolet lamp, a medical device carrying device, a partition and a motor; the spray device is fixed on the upper end of the disinfection drying box with bolts and nuts; the gas filter device is fixed On the upper right side of the disinfection drying box; the partition plate is welded on the inner wall of the disinfection drying box; the motor is fixedly arranged on the bottom end surface of the inner wall of the disinfection drying box and in the motor cover; the medical device carrying device is welded on the upper end of the rotating shaft; The electric heating rod is fixedly arranged on the right side wall inside the disinfection drying box, in the heating cover; there are several ultraviolet lamps, which are fixedly arranged on the left side inside the disinfection drying box, and are arranged in the glass cover. The device of the invention can realize the rotation, spray cleaning, disinfection and drying treatment of medical instruments, has high treatment efficiency, and simultaneously collects waste liquid and treats waste gas.

The invention relates to a technology and equipment for dedusting mixed oil gas, in particular to the technology and the equipment for dedusting mixed oil gas formed by splitting waste rubber and waste plastic. The technology is characterized in that the oil gas is sprayed and dedusted by same type of oil after being filtered and dudusted; and when dust falls, and oil adhered on the dust is converted into gaseous state from liquid state. The equipment comprises a tower body of which the lower end is provided with an oil gas inlet, wherein the tower body is internally provided with a filteringand dedusting mechanism and a spraying device for same type of oil, and the spraying device is arranged above the filtering and dedusting mechanism; the filtering and dedusting mechanism comprises dedusting rotary cage controlled by a lateral shaft; and the total volume of the filler filled into the dedusting rotary cage under the natural state is smaller than the volume of the dedusting rotary cage. In the invention, the reasonable technology and the reasonable equipment are adopted for dedusting and purifying oil obtained by splitting waste rubber and waste plastic, oil discharging quality and carbon black quality are improved, environmental pollution is lightened, thus providing a new path for solving the increasingly serious energy crisis, so that the technology and the equipment can be widely popularized and used.

The invention discloses a novel screw rotor tooth shape of a twin screw compressor. The novel screw rotor tooth shape comprises a male rotor tooth shape and a female tooth shape, and is characterized in that each tooth shape on the end surface of the male rotor and the female rotor consists of six segments of curves in smooth connection, and the curves comprise an ellipse arc, a circular arc and an enveloping line thereof, wherein the six segments of curves of each tooth of the female rotor comprise: a tooth curve ellipse arc a2b2, a tooth curve circular arc b2c2, a tooth curve arc c2d 2, a tooth curve circular arc enveloping line d2e2, a tooth curve circular arc e2f2 and a tooth curve circular arc f2g2, wherein the curves of each tooth are connected in sequence. The six segments of curves of each tooth of the male rotor comprise a tooth curve ellipse arc enveloping line a1b1, a tooth curve circular arc enveloping line b1c1, a tooth curve pin tooth circular arc c1d1, a tooth curve circular arc d1e1, a tooth curve circular arc enveloping line e1f1and a tooth curve circular arc f1g1; and the curves of each tooth are connected in sequence. Therefore, when the tooth surfaces are in conjugate meshing, the tooth surfaces of two rotors are improved to 'belt' sealing from 'line' sealing, so as to improve the sealing effect obviously, contribute to forming a lubricating oil film and reducing tooth surface abrasion, and prolong the rotor life greatly.

The invention discloses a pipeline leakage detection device and detection method. The device comprises a wrapping body (1) which coats a detected pipeline segment (100) and forms annular sealing; the wrapping body (1) extends along the axis of the detected pipeline segment (100), and a space (2) for containing gas is reserved between the inner wall face of the wrapping body (1) and the outer wall of the detected pipeline segment (100); the two ends of the wrapping body (1) are provided with through holes (3) for containing the detected pipeline segment (100); a gas leakage induction device (4) for monitoring whether leakage is generated to the detected pipeline segment (100) or not is arranged on the wrapping body (1); and the gas leakage induction device (4) is electrically connected with an external controller. After the structure is adopted, the pipeline leakage detection device which can carry out gas leakage detection and alarming and discharge leaked gas to a designated place and meanwhile achieves whole-process monitoring of a pipeline connector, a weld joint and a whole pipeline is provided.

The invention discloses a hollow shaft rotary sealing concrete mixing truck which comprises a mixing drum that is arranged on a truck body and can rotate relative to the truck body. A feeding cylinder is arranged in the middle of an outlet of the mixing drum. The hollow shaft rotary sealing concrete mixing truck further comprises a moving component which is arranged on the truck body and can move relative to the truck body; a sealing cover is arranged on the moving component through a rotary support; the external edge of the sealing cover is in contact with the external edge of the outlet of the mixing drum, and a first sealing device is arranged at the contact part; and the sealing cover, under the driving of the mixing drum, rotates relative to the moving component along with the mixing drum. The sealing cover for plugging the mixing drum is in a rotary structure and synchronously rotates along with the mixing drum, and a dynamic sealing part is changed to be positioned between the feeding cylinder and a feeding hopper accordingly, thus the rotating radius of the dynamic sealing part is reduced substantially, the relative linear velocity of the dynamic sealing part is reduced, the abrasion to a sealing component is reduced when the sealing effect is ensured, the reliability of the hollow shaft rotary sealing concrete mixing truck is improved, and the maintenance difficulty is lowered.

The invention relates to a thermal management device for a power battery pack with a function of automatically controlling a non-steady-state temperature field, which comprises a battery pack, a temperature collection unit, a semiconductor cooler / heater, an external circulating fan, an internal circulating fan and a controller. A power battery monomer is arranged in the battery pack; the temperature collection unit is arranged on the pole of the power battery monomer; the semiconductor cooler / heater comprises a cold end plate and a hot end plate, automatic switching can be achieved between the two end plates, the two end plates are arranged on the shell of the battery pack, the cold end plate is arranged inside, the hot end plate is arranged outside, the cold end plate is a cooling plate and the hot end plate is a heat dissipating plate in forward powering-up, and the cold end plate is a heating plate and the hot end plate is a heat absorbing plate in reverse powering-up; the external circulating fan is arranged on the hot end plate of the semiconductor cooler / heater and is used for heat exchange between the hot end plate and external air; the internal circulating fan is arranged on the cold end plate of the semiconductor cooler / heater and is used for air circulation in the battery pack and heat exchange between the cold end plate and air in the batter pack; and the controller is used for controlling the thermal management device. Meanwhile, the invention discloses a method for implementing thermal management of the thermal management device.

The invention discloses a torsional impact drilling device which comprises a drill bit and a high-frequency torsional impact mechanism. The high-frequency torsional impact mechanism is connected with the drill bit and used for providing impact torque for the drill bit to break a rock stratum. The high-frequency torsional impact mechanism internally comprises a jet flow reversing element and a rotary impact part. The hydraulic energy of fluid entering the high-frequency torsional impact mechanism can be converted into reciprocating circumferential high-frequency low-amplitude rotating impact of the rotary impact part after passing through the jet flow reversing element to act on the drill bit. The device is smaller in structure and is provided with a smaller number of quick-wear parts, so that the mechanical drilling speed is better improved, and the service life of the drill bit is better prolonged.

The invention discloses a shielded, sealed and anti-rotation circular connector which comprises a plug and a socket. The plug comprises a plug shell assembly and a tail assembly, and the socket comprises a socket shell assembly and a tail assembly; the plug shell assembly comprises components including a shell, a connecting ring, jacks, a shielding ring, a locking backstop mechanism, toothed sleeves, insulator assemblies and the like; the socket shell assembly comprises components including a socket shell, pins, a U-shaped sealing ring, a boundary sealing pad, insulator assemblies, toothed sleeves and the like; each tail assembly comprises a connecting nut, a sleeve, a cone-point set screw, elastic parts, a shielding bushing and the like. The shielded, sealed and anti-rotation circular connector has the advantages that after the plug is connected with the socket, a cable shielding layer without skin is directly clamped by the shielding bushings of the tail assemblies of the plug and the socket, so that the connector and a cable can be circularly shielded and can be prevented from being pulled by external force; the connecting nuts are fixedly connected with the sleeves by the elastic parts, and the sleeves are driven to axially move when internal threads on the connecting nuts are matched with external threads on the plug shell / the socket shell, so that the sleeves and the shells can be sealed.

The disclosure relates to a peripheral sealing gland to form a seal, between an elongate member and a substantially flat surface. The gland has an at least in part tapered skirt or frustoconical shaped skirt through which the elongate member is to pass and defining at the upper periphery of the skirt and deformable upper seal to deform about and seal to a periphery of said elongate member. A flange depends from the lower periphery of the skirt including on its outward from the skirt presented surface, at least one endless lip to seal when brought into contact, against said substantially flat surface. A compression ring is able to bear on said flange, to be fastened to said substantially flat surface to capture the flange therebetween. In an alternative embodiment a planar flange with at least one endless lip seal is disclosed, and a further alternative embodiment combines this with the frusto-conical shaped skirt.

The invention relates to a steam box and microwave oven all-in-one machine. The steam box and microwave oven all-in-one machine comprises a box body. A cooking chamber oven cavity is formed in the box body. An oven door assembly used for opening or closing the cooking chamber oven cavity is arranged on the front side of the box body. A steam generating device, a microwave generating device, a control device and a microwave guide device are further arranged in the box body. An outlet of the microwave guide device is communicated with a microwave inlet port, a microwave stirrer is arranged on the microwave inlet port, and a flat plate located in the cooking chamber oven cavity is arranged above the microwave stirrer. The oven door assembly is sequentially provided with a door handle, door glass, a door body support, a metal door body, a door body sealing ring support, a door body sealing ring and a door seal from exterior to interior. The steam box and microwave oven all-in-one machine can achieve the heating function of a microwave oven and the functions of a steam box. Meanwhile, the oven door assembly can effectively prevent microwaves and steam from leaking, condensate water generated on the inner wall of the oven door body can further be guided into the cooking chamber oven cavity, and thus hidden sanitation danger caused by the phenomenon that the condensate water flows out of the cooking chamber oven cavity is avoided.

The invention discloses a timed passive air sampler, which comprises an air sampler main body, wherein the air sampler main body comprises a packaging barrel with an opening at the top, an adsorbent cage which is sheathed in the packaging barrel, a blocking pillar, an electromagnet and a timing driving circuit; a timing beginning sensor and a mounting bracket are arranged on the side wall of the packaging barrel; a rubber plug matched with the top of the packaging barrel is arranged at the top end of the adsorbent cage; a return spring is arranged between the bottom of the adsorbent cage and the bottom of the packaging barrel; a bayonet which can be pulled out to expose the packaging barrel and a sensing body corresponding to the timing beginning sensor are arranged on the adsorbent barrel; the blocking pillar is arranged on the mounting bracket and can move in the radial direction of the packaging barrel and be matched with the bayonet; the electromagnet is arranged on the outer wall of the bracket of the packaging barrel and can control the blocking pillar to be departed from the bayonet; and the timing driving circuit is connected with the timing beginning sensor and the electromagnet. The timed passive air sampler can implement the accurate automatic control of the sampling time, automatic packaging, and effectively improve the sampling accuracy of the passive air sampler.

The invention relates to a puncture device which is good in sealing performance. The puncture device comprises a sealing assembly, wherein the sealing assembly comprises a plurality of elastic sealing pieces arranged between a pair of rings. Each elastic sealing piece comprises a conical surface thin wall part in the shape of a circular cone and an annular part connected to the bottom of the conical surface thin wall part, wherein a fan-shaped notch is formed in the conical surface thin wall part, and the top end of the fan-shaped notch is the top end of the conical surface thin wall part. The annular parts of the elastic sealing pieces are stacked to enable the conical surface thin wall parts of the elastic sealing pieces to form a conical sealing piece, and then a surgical instrument penetrating through the sealing assembly is made to be in clearance fit with the sealing assembly in a sealing mode. A 300-340 degree circumference is arranged on the bottom of the conical surface thin wall part of each elastic sealing piece. After the surgical instrument penetrates through the sealing assembly, the lateral wall of the surgical instrument can be wrapped with the radial edges of the fan-shaped notches of the elastic sealing pieces more tightly, so that sealing performance is improved, and even when the air pressure in the enterocoelia reaches 8KPa, air leakage can not happen.

The invention discloses a natural gas hydrate sediment triaxial test device, and belongs to the field of testing the mechanical properties of natural gas hydrate sediment. The device comprises a triaxial test device main machine, a temperature control system, a pore pressure control system, a confining pressure control system and a computer data acquisition and control system. The triaxial test device main machine, which is in a dual-pressure-chamber structure, can be used for accurately measuring volume change in the sediment in a natural gas hydrate decomposing process; a load sensor is arranged inside the pressure chamber and is capable of improving the precision of intensity data; a pre-cooling hollow cavity is formed inside a base to pre-cool pore gas and pore water which enter a sample, so as to relieve the decomposition of the natural gas hydrate in a saturated water process and to improve the precision of temperature control; in a sample installation process, a quick coupling is adopted for connection, so that the operation is convenient and rapid. The device can simulate the natural gas hydrate decomposing process under mining conditions, so as to achieve the high-precision temperature control, and accurate measurement of intensity and volume change; and the device has great significances for understanding the mechanical properties of the natural gas hydrate sediment and assessing the stability of a reservoir.

The invention discloses a method for classifying silicon carbide micro powder and classifying equipment of the method, which belong to the technical field of classification of micro powder. The method mainly includes steps that the silicon carbide micro powder sequentially enters at least two classifying machines which are serially connected, each classifying machine is provided with a self-suction sealing device, the classifying precision of each downstream classifying machine is higher than that of the adjacent upstream classifying machine, a cyclone collector is connected with the tail-end classifying machine and collects sorted silicon carbide micro powder; a bag dust collector collects waste discharged from the cyclone collector, and a system is powered by an induced draft fan disposed on a downstream of the bag dust collector. By the aid of the method and the classifying equipment, technical problems that in the prior art, the classifying precision of silicon carbide micro powder is low, extraction rate of fine powder is low, distribution of granularities of finished products is wide are solved. In addition, the method and the classifying equipment are widely applied to finely classifying silicon carbide grains.

The invention discloses a packing type intelligent cleaning nursing bed. The packing type intelligent cleaning nursing bed comprises a bed frame, the bed frame is successively provided with a back-portion bed plate, a fixation bed plate and a leg-portion bed plate, a back-portion bed plate elevating apparatus is installed between the back-portion bed plate and the bed frame, a leg-portion bed plate ascending and descending apparatus is installed between the leg-portion bed plate and the bed frame, the fixation bed plate is provided with a nursing hole, the nursing hole is internally provided with a toilet seat apparatus, an excrement bag support apparatus is installed below the toilet seat apparatus on the fixation bed plate, a bag walking sealing apparatus is connected with the lower portion of the excrement bag support apparatus, an excrement bag collection apparatus is connected with the lower portion of the bag walking sealing apparatus, one side of the toilet seat apparatus is provided with a warm-water warm-air apparatus, and the warm-water warm-air apparatus is connected with a control unit. According to the invention, the packing type intelligent cleaning nursing bed can carry out packaging sealing and collection processing on urine and excrement of a patient in bed, can also carry out warm water flushing and warm air drying nursing after defecation of the patient, can perform ozonolysis on gases discharged through the uterine and the excrement, avoids pollution caused to environment and is reliable to use.

The invention discloses a wafer level packing method for packing LED array. In such a method, the LED chip array is first arranged on a crystal wafer that is provided with a socket in advance and can be used as a retention device of epoxide resin fluid in next packing process; then, the epoxide resin encapsulant is dripped on an underlay and then is solidified to finish the packing process. The usable LED can be obtained directly by cutting the wafer. Compared with the traditional technology, the wafer level packing method for packing LED array does not need moulds, thereby reducing cost and realizing high-density packing.

The invention discloses a multi-functional spindle mechanism used for the small deep holes electrical discharge machining, belonging to the technical field of micro non-traditional machining. The multi-functional spindle mechanism comprises a rotating spindle mechanism, a transmission mechanism, a normally closed clamp mechanism, a sealing mechanism, an electric brush mechanism, a wire replacing mechanism, a normally opened clamp mechanism, a guide mechanism and a connecting mechanism, wherein the rotating spindle mechanism, the transmission mechanism, the normally closed clamp mechanism, the sealing mechanism, the electric brush mechanism and the wire replacing mechanism are fixedly mounted on an upper mounting plate, and the normally opened clamp mechanism is mounted on a lower mounting plate; the upper mounting plate is connected to the lower mounting plate through the guide mechanism and a degree of freedom of relative movement in the z direction is kept; the upper mounting plate is connected to a z-axis top plate through the connecting mechanism, and the lower mounting plate is connected to a z-axis bottom plate through the connecting mechanism. The mechanism processes the film cooling group holes in the hot components of the aero-engines and the gas turbines, which can realize multiple functions of the forward pushing creep feed, the high precision rotation and the hollow high pressure flushing of the tool electrodes, and the on-line replacement of the electrodes.

The invention discloses an LNG ultra-low temperature top-mounting type ball valve seat capable of achieving pre-tightening force fine tuning and on-line disassembling. The LNG ultra-low temperature top-mounting type ball valve seat is characterized in that valve seat bearings are symmetrically arranged at the position, located on the upstream side and the downstream side of a valve element ball, in a valve body, and a locating pin is arranged between the end faces of the tails of the valve seat bearings and the front end face of a valve seat fixing ring; a valve seat sealing ring is embedded in twisting edges of the front ends of the valve seat bearings; valve seat pressing rings matched with the valve seat bearings in a threaded mode are arranged on the peripheries of the valve seat bearings, pre-tightening compressed springs are arranged between the tails of the valve seat pressing rings and the valve body, and the valve seat bearings can move in the axis direction by rotating the valve seat pressing rings. The LNG ultra-low temperature top-mounting type ball valve seat can be suitable for meeting requirements of LNG actual using conditions, the requirements for on-line maintenance, automatic decompression of a middle cavity in time and safe and reliable sealing performance are met, and quality and safety of LNG projects are guaranteed.

The invention discloses a multipurpose cap-shape valve respiratory valve, comprising a valve seat, a valve core and a fixed sleeve; the valve core is of cap shape and made of elastic rubber; the cap rim of the valve core is fixed between the valve seat and the fixed sleeve; the cap body is sheathed in the central hole of the valve seat or the fixed sleeve; furthermore, the top of the cap of the valve core is provided with at least two lancings so that at least one valve clack is formed at the top of the cap. the lancings are distributed all around in a radial pattern from the axle center projected at the top of the cap to form a taper angle shape valve clack, or a C shape, V shape, U shape or opening polygon shape valve clack to cause the end part projected at the top of the cap to form a flip-shell valve clack or cause the lateral side projected at the top of the cap to form at least two valve clacks. The invention has the advantages of simple structure, few faults, long service life, low manufacturing cost, multiple functions and extensive usage, is favorable for environment protection, and has good social and economical benefits.

The invention discloses a test system for the water tightness test of a tunnel deformation joint waterstop, which comprises two steel tanks mounted, in a sealed manner, at two sides of a waterstop to be tested, a steel structured test bench, an atmospheric pressure test bench, a hydraulic pressure test bench, an air compressor, a remote-distance full-automatic observing and reading apparatus and a safety protection device. The test device of the invention can be used for the water tightness test of a plurality of waterstops, realize random opening displacement and shear displacement accurately, and simulate the stress condition of deformation joint waterstop structure under different working conditions by applying atmospheric pressure in balloon to a tested object through the atmospheric pressure test bench and applying hydraulic pressure to the steel tanks through the hydraulic pressure test bench to simulate seawater pressure. The system and the method are suitable for the test of OMEGA and GINA waterstops as well as expandable waterstop.

The invention relates to the technical field of cooking appliances and in particular relates to a cooking appliance with an automatic exhaust function. The cooking appliance with the automatic exhaust function comprises a cover, an exhaust pipe arranged on the cover, a pressure-limiting valve which sleeves the exhaust port of the exhaust pipe and is used for sealing or unsealing the exhaust port, and a pressure-limiting valve driving device and a control device; the pressure-limiting valve driving device is capable of driving the pressure-limiting valve to move upwards and unseal the export port under the control of the control device. The cooking appliance with the automatic exhaust function is capable of stopping the pressure-limiting valve from sealing the exhaust port by match of the control device and the pressure-limiting valve driving device and thus realizing exhaust of the electric pressure cooker. Potential safety hazards caused by directly operating the pressure-limiting valve by the hands are avoided; meanwhile, the device for realizing automatic exhaust of the electric pressure cooker is simple in structure and convenient to operate.

The invention provides a branch air supply device and a refrigerator. The branch air supply device comprises a shell, a plurality of baffles, a plurality of transmission components, a driving device and a gear position sensing device. The shell comprises a plurality of air supply outlets; each baffle is installed at one air supply outlet; each transmission component is provided with a second transmission member and a second transmission mechanism; a first drive mechanism is configured to transfer the rotary motion of the corresponding second transmission member to the baffles; the driving device comprises a drive source and the first drive mechanism, the first drive mechanism is configured to transfer a motion output from the drive source to the second transmission member, and the first drive mechanism is provided with a first transmission member; and the gear position sensing device is configured to detect the position of the first transmission member when the rotation stops so as todetermine the air outlet status of each air supply outlet according to the position of the first transmission member when the rotation stops. Cool air can be reasonably distributed to enhance the fresh-keeping performance and operating efficiency of the refrigerator; and the control is simple, the adjustment is convenient, the adjustment speed is high, and the adjustment accuracy is high.