44results about How to "Reduce inspiratory volume" patented technology

A ventilation system and method with a ventilating tube, a stylet removably disposed within the ventilating tube, and a proximal housing. A proximal housing includes a proximal end that connects to the ventilating tube, a distal end that connects to a ventilating machine, a lumen between the proximal end and distal end, an external wall between the proximal end and distal end, a filter contained within the external wall, surrounding the lumen, and connecting the proximal end and distal end, and a cavity between the filter and the external wall. A proximal housing contains at least one detection element and can be sensitive to carbon dioxide. The same proximal housing contains at least one treatment element to heat, cool, humidify, dehumidify, or provide medication to the lumen of the proximal housing.

The invention discloses an air conditioner control method, an air conditioner and a storage medium. The method includes: obtaining the exhaust pressure value and the air outlet temperature of a compressor; determining the second electronic device according to the exhaust pressure value and the air outlet temperature The target opening number of expansion valves; controlling several second electronic expansion valves to operate according to the target opening number. The present invention controls the opening number of the second electronic expansion valve according to the discharge pressure value of the compressor and the air outlet temperature, and then controls the number of the first heat exchangers participating in the heat exchange of the air conditioner, so that when the air conditioner is in a low-temperature refrigeration state, it can stabilize Compressor exhaust pressure to avoid frequent start and stop of the compressor; when the air conditioner is in a high-temperature heating state, it can reduce the refrigerant evaporation and compressor suction volume, and prevent the exhaust and condensation pressure from exceeding the compressor pressure operating range, thereby improving the air conditioner. The service life of the compressor.

The invention discloses a coating for a metal mold casting of magnesium alloy thin-wall parts, wherein the coating consists of following components, by weight percent, 1.5 to 2.5% of diatomaceous earth, 2 to 3% of magnesia powder, 1.2 to 1.8% of titanium dioxide powder, 1 to 2% of zircon powder, 1.5 to 2.5% of bentonite, 2 to 4% of asbestos powder, 1.2 to 1.4% of silica sol and the balance of alcohol.

The invention discloses a filtering device based on a built-in passage board. The filtering device based on the built-in passage board comprises a shell, an exhaust pipe and a washing pipe; a separation board parallel to the horizontal plane is arranged on the sealed end of the shell; the separation board extends from the sealed end of the shell to the opening end of the shell and divides the inner space of the shell into an air filtering chamber and a sand collecting chamber; a matched sand collecting chamber cover is arranged at the end, located at the opening end of the shell, of the sand collecting chamber; the passage board vertical to the separation board is arranged on the separation board; the passage board is provided with a plurality of passages; and a sand discharging hole is formed in the separation board. The sand concentration in the air filtered by the passage board is greatly reduced, a small quantity of sand particles can not damage an air cleaner of an air compressor, and the air cleaner does not need to be frequently disassembled and washed by an operator. The sand collecting chamber has enough space to store the sand particles; after the sand particles in the sand collecting chamber are piled to a certain degree, the exhaust pipe and an air inlet of the air compressor are disconnected, the sand collecting chamber cover is opened, and the sand particles are discharged.

This invention is a ceramic grain reinforcing Al-base compound material and its preparation method, and relates to a Al-base alloy. Its components are: 2.5-15% TiN, 2.4-10%AIN, 4-6.5%Si, 0.5-1.5%Cu, 0.3-0.5%Mg, 0-0.8%Ni, 0-0.5%Ti, and the rest is Al, and the percentages are weight percentages; the preparation method adopts melt blending founding method, and the technique flow is: material matching-melting base body-adding reinforcing grains-melting-modifying treatment-pouring-heat treatment, and the size reinforcing grains is in the range of 5-10 mum, and the vacuum degree of the vacuum furnace is 1.3-1.6X10 to the power -3 Pa, the temperature is 670-800deg.C, the modifying agent is 1-18g / Kg compound material containing 1-6% Na nanometer Al alloy powder; the Al-base compound material of this invention has light weight, high modulus number, high intension, good heat-fast and wearable performances, and the preparation cost is low, the technique is simple and it can be industrially produced.

The invention discloses a sewage discharge drop shaft structure in an internal circulation air pipe, which comprises a vertical shaft and an internal circulation air pipe arranged in the shaft; the internal circulation air pipe divides the vertical shaft into a water-passing part and a water-passing air pipe part , the water passing part is connected with the water inlet pipe, the top of the inner circulation airflow pipe is lower than the bottom of the water inlet pipe, and the bottom of the inner circulation airflow pipe is higher than the top of the outlet pipe, which is used to guide the gas to form an inner airflow pipe in the airflow pipe. Circulating air flow; the internal circulating air flow pipe is vertically suspended in the vertical shaft by a fixing device, and the internal circulating air flow pipe is in contact with the inner wall of the shaft. The invention also discloses a method for using the sewage discharge drop shaft structure based on the internal circulation air flow pipe. The vertical shaft structure of the present invention improves the problem of odor emission and environmental pollution in the sewage system, and can be set according to different water flows to achieve the best gas reduction effect without affecting the requirements for pipeline maintenance and access.

The invention discloses a three-section type screw rotor and a twin-screw vacuum pump comprising the same and belongs to the field of dry twin-screw vacuum pumps. The screw rotor comprises a gas suction section, a compression section and a gas exhaust section, wherein section profile lines of the gas suction section, the compression section and the gas exhaust section change continuously with a spiral expansion angle; the gas suction section and the gas exhaust section have profile lines with the equal pitch and equal sections, the pitch of the gas suction section is larger than that of the gas exhaust section, but the tooth top surface width of the gas suction section is smaller than that of the gas exhaust section; transition from the gas suction section to the gas exhaust section is realized by the aid of the compression section; the compression section has the profile line with the varying pitch and varying section; and tooth surfaces and spiral lines between the gas suction section and the compression section and between the compression section and the gas exhaust section are in smooth transition. The screw rotor can form the relatively large gas suction volume and the relatively small gas exhaust volume within a relatively small axial size, and the inner volume ratio and the sealing performance of the screw rotor are increased; thus, the screw rotor has the advantages of large inner volume ratio, good sealing performance, compact structure, small axial size and low machining difficulty, and the final vacuum and the pumping speed of the twin-screw vacuum pump are increased.

The invention relates to a vehicle hub using high impact toughness Al-Si-Mg alloy new material and the manufacture method. It uses Al, industrial pure Si, Al-Mg alloy, Al- Cu alloy, Al-Sr alloy, Al-rare earth intermediate alloy, and Ti power as raw material and taking smelting, ultrasonic, electromagnetic wave to whisking equally, degassing by nitrogen, filtering by double stage multi hole ceramic, and casting by water cooling crystallizer. The invention could improve impact toughness, and improve the casting capability.

Provided is a vehicle power transmission system which quickly performs shift operations in the transmission and is capable of alleviating the operator's discomfort due to so-called torque loss during said shift operations. This vehicle power transmission system (100) is provided with an engine (110) the operation of which is controlled by an ECU (300), a clutch (210) and a transmission (240). The engine (110) is provided with a bypass pathway (121) in a state in which a throttle valve (117) is bypassed by an intake pipe (116) which introduces a fuel-air mixture into a cylinder (111). An idle regulating valve (122) is provided in the bypass pathway (121). The idle regulating valve (122) regulates the amount of air that bypasses the throttle valve (117) and is supplied to the cylinder (111). The ECU (300) reduces the deceleration torque in the transmission (240) by opening the idle regulating valve (122) prior to shift change operations of the transmission (240).

The invention discloses a cylinder assembly, comprising a cylinder body, the cylinder body has an air suction channel, the inner wall of the air suction channel has a valve chamber, and a valve is reciprocally arranged in the valve chamber, so The movement direction of the valve is perpendicular to the axial direction of the suction channel, and a driving device that can drive the valve to extend into the suction channel is arranged in the valve chamber. The cylinder assembly can effectively reduce the operating load of the compressor when the discharge pressure is high and the suction and discharge pressure difference is large. The invention also discloses a compressor using the cylinder assembly.