40results about How to "Reduce exhaust velocity" patented technology

The invention discloses a bubble water machine with multi-channel exhaust, comprising: a main base, on which an exhaust base and an air intake base are arranged; an exhaust control unit, which is movably installed on the main base The base is placed above the exhaust base; the thimble is movably installed on the exhaust base; the handle is used to drive the exhaust control unit to move, so that the exhaust control unit presses down The thimble is used to puncture the gas cylinder installed on the exhaust base for exhaust; the air intake base is provided with an air intake channel and a first pressure relief channel; the air intake channel is provided with a limiting flow valve; the first pressure relief channel is connected to an exhaust valve through a first conduit; when the handle is working, the exhaust control unit presses down the thimble to exhaust the gas cylinder, but does not press down the exhaust valve. At this time, the sealing plug reciprocates under the gas pressure to release the pressure.

The invention provides a system and method for ventilating a room having walls , a floor and a ceiling, and being capable of housing a patient's bed, comprising at least one air supply unit and one air exhaust unit, where said air inlet unit comprises a guiding slot diffuser for guiding an airstream in a certain direction, such that a patient, lying down in said bed on his back, receives said airstream frontally, and that said exhaust unit is arranged near the floor and near a head end of the bed such that air is arranged to enter the portable air conditioning unit after having ventilated the patient. The air supply unit is also provided with means such that fresh air can be forced through the diffuser forming a first airstream and that said first airstream leaves the diffuser bringing with it a larger mass of fresh air leaving the portable air supply unit via perforated sheets, forming the airstream devised to cool the patient.

The invention provides a temperature-controlled and pressure-controlled formation method of a lithium-ion battery, which includes injecting liquid and forming the assembled battery under controlled temperature and pressure. The temperature-controlled and pressure-controlled formation method includes low-pressure formation and normal temperature formation. As well as multi-stage formation processes such as high-temperature formation, the lithium-ion battery obtained through the method has good cycle life and high-temperature stability.

The invention discloses an exhaust device. The exhaust device comprises a shell, a pressure balance ball and a support, wherein a first cavity and a second cavity separated from each other are formed in the shell; a first air inlet and a first air outlet communicating with the first cavity, and a second air inlet and a second air outlet communicating with the second cavity are formed in the shell; a third cavity and a fourth cavity which are separated from each other are formed in the pressure balance ball, one part of the pressure balance ball is placed in the first cavity and provided with a third air inlet and a third air outlet which are in communication with the third cavity, the third air inlet communicates with the first air inlet, and the third air outlet communicates with the first air outlet; the other part of the pressure balance ball is placed in the second cavity and provided with a fourth air inlet and a fourth air outlet which are in communication with the fourth cavity, the fourth air inlet communicates with the second air inlet, and the fourth air outlet communicates with the second air outlet; and the support is used for supporting the pressure balance ball. According to the exhaust device, the pressure pulse and exhaust velocity of engine exhaust can be effectively reduced, and exhaust damping can be achieved.

The application provides a pump body assembly, a compressor and an air conditioner. The pump body assembly includes a main shaft, a flange, a cylinder, and a sliding vane. The main shaft includes a convex portion, and a plurality of sliding vanes are arranged on the convex portion at intervals along the circumferential direction. Corresponding to each compression cavity, there is at least one radial exhaust channel, and an axial exhaust channel is also opened on the main shaft, and the axial exhaust channel extends along the axial direction of the main shaft to the outside of the matching area between the flange and the main shaft. And it communicates with the space outside the pump body assembly. An exhaust valve assembly is arranged in the radial exhaust passage. The exhaust valve assembly communicates with the compression chamber and the axial exhaust passage when the pressure of the refrigerant in the compression chamber reaches a preset pressure. According to the pump body assembly of the present application, the area of ​​the exhaust passage can be unrestricted, and at the same time, leakage during the compression process of the compressor can be effectively avoided to ensure the performance of the compressor.

The invention relates to a method for preparing pure-phase gamma-AlON transparent ceramic powder by carbothermal reduction of gamma-Al2O3, and belongs to the field of preparation of transparent ceramic materials. According to the preparation method, nano-alpha-Al2O3 and activated carbon are taken as raw materials; powder is filled in a graphite crucible loosely, wherein an aluminum oxide plate is paved at the bottom of the graphite crucible; an air hole which penetrates through the powder is preformed at the aluminum oxide plate; a graphite cover provided with fine and dense air holes is used for covering the hole; the pure-phase gamma-AlON transparent ceramic powder is prepared by adopting a two-step heating process in a flowing nitrogen environment with a micro positive pressure. By the adoption of the preparation method, the vacuumizing difficulty can be effectively reduced, powder is prevented from scattering in a vacuumizing stage, the time required for discharging adsorbed gas can be greatly shortened, the vacuumizing speed is high, and the preparation efficiency of the gamma-AlON powder is greatly improved; the obtained gamma-AlON powder phase has stable and reliable compositions and can be used for pressure-less sintering preparation of AlON transparent ceramics with high transmittance; the process is simple and is easy to operate, and is suitable for industrial production.

The invention discloses a rotational compressor and an electrical product comprising the rotational compressor. The rotational compressor comprises an air cylinder, an upper cover, a lower cover, a rolling piston and a sliding plate, wherein the upper cover and the lower cover are arranged at the two ends of the air cylinder, and the rolling piston and the sliding plate are arranged in the air cylinder. An inner cavity of the air cylinder is divided by the rolling piston and the sliding plate into a suction cavity and a compressing cavity. A main exhaust passage communicating with the compressing cavity is arranged on the inner wall of the air cylinder. At least one of the upper cover and the lower cover is provided with an auxiliary exhaust passage and an auxiliary exhaust valve used for controlling opening and closing of the auxiliary exhaust passage. The projection position, on a horizontal plane, of an air inlet of the auxiliary exhaust passage is located in a preset area. When the rotational compressor is in an exhaust stage and the air inlet of the auxiliary exhaust passage communicates with the compressing cavity, the auxiliary exhaust valve is opened so that exhausting can be carried out. By means of the arrangement, the clearance volume of the rotational compressor can be reduced, and the energy efficiency of the compressor can be improved.

The invention relates to an automobile muffler for controlling airflow regenerated noise. A first clapboard and a second clapboard axially vertical to a shell divide the interior of the shell into a first expansion cavity, a second expansion cavity and a dissipative muffler chamber; and an air inlet pipe, a transition pipe and an air outlet pipe are axially parallel to the shell and are arranged at intervals mutually. The air inlet pipe penetrates through a front end cover, the first clapboard and the second clapboard so as to be stretched into the second expansion cavity; one end of the air outlet pipe is located in the first expansion cavity; the air outlet pipe penetrates through the first clapboard, the second clapboard and a rear end cover and gets out; and one end of the transition pipe is located in the first expansion cavity, and penetrates through the first clapboard and the second clapboard so as to be stretched into the second expansion cavity. Micropores are formed in pipe walls of the air outlet pipe and the transition pipe in the dissipative muffler chamber; and the air outlet pipe in the second expansion cavity. An outlet end of the air inlet pipe is of an expansion port structure. Acoustic absorption cotton covers the shell, inner walls of the front end cover and the rear end cover, and the last section of the air outlet pipe. Airflow entering into the muffler is compressed and expanded for multiple times through three pipes and three chambers, and is in smooth transition, and the speed is gradually reduced, so that the airflow regenerated noise is obviously reduced.