32results about How to "Sufficient vacuum" patented technology

A device for separating plasma from whole blood is provided having an evacuated primary collection chamber capable of fluid communication through a porous filter to an evacuated secondary collection chamber. An agglutinating agent is provided within the primary collection chamber so as to aggregate blood cells within a whole blood sample. The porous filter has a pore size which is small enough to capture the aggregated blood cells therein, yet large enough to permit plasma to transfer therethrough under pressures associated with conventional evacuated blood collection tubes. The primary and secondary collection chambers may be provided in separate containers or tubes, with transfer occurring therebetween through a transfer device including the porous filter therein.

Methods and systems for providing vacuum to a vehicle are described. In one example, a method adjusts an engine air-fuel ratio in response to provide additional vacuum to the vehicle.

A cleaning robot comprising a robot machine body (100). Drive wheels (110) are arranged on the machine body (100). A dust intake opening (120) is provided at the bottom part of the machine body (100). With the direction in which the cleaning robot travels serving as the front (A), a static seal (130) is arranged at the rear and two sides of the dust intake opening (120). The lower edge of the static seal (130) extends towards a to-be-cleaned work surface (B). A dynamic sealing element (140) is arranged at the front of the dust intake opening (120). The dynamic sealing element (140) comprises an actuating element (141) and a dynamic seal (142). A gap between the dynamic seal (142) and either the edge of the dust intake opening (120) and / or the to-be-cleaned work surface (B) forms an air intake opening. The dynamic seal (142) is driven by the actuating element (141) into motion, thus allowing the area of the air intake opening to change dynamically. By arranging the dynamic sealing element (140) at the dust intake opening (120), not only the dust intake opening (120) is provided with a sufficient degree of vacuum, but also the dynamic sealing element (140) does not obstruct dust particles from reaching the dust intake opening (120), thus allowing for a simplified structure and increased cleaning efficiency.

The present invention provides a mattress care device which is provided so as to be capable of moving a mattress downward to a position lower than the top surface of a bed frame, and is provided with a cleaning module which performs sterilization cleaning while moving along the upper portion of the mattress when the mattress is moved downward. Therefore, under the condition that sterilization and cleaning are not carried out, the cleaning module is kept in a hidden state, and therefore the situation that a user possibly feels uncomfortable visually is avoided.

The invention relates to the field of wood floor processing, in particular to a wood floor carbonization processing method. The wood floor carbonization processing method comprises the following steps (1), preliminary treatment: cutting the wood into the shape of the floor to obtain the floor embryo; (2), hot pressing carbonization: putting the floor embryo into a hot press machine for high-temperature carbonization , to obtain the carbonized wood embryo; (3), cooling: place the carbonized wood embryo in the hot press and cool it to below 160°C through the cooling oil device of the hot press; (4), finished product: the cooled carbonized wood embryo from Take it out from the hot press and process it later to get the finished carbonized floor. The method directly completes the steps of hot-pressing carbonization and cooling in the hot-pressing machine, which makes the operation simple and convenient for workers, makes the whole carbonization process safe and controllable, improves the rate of finished products, and further improves the quality of the finished floor.

The invention discloses an air pumping mechanism, which includes a suction cup, a vacuum tube, a needle and a needle driving mechanism; the vacuum tube is a hollow structure and includes a cavity extending along its length, and the suction cup is used for being adsorbed on a soft-packed lithium battery The airbag bag, the rear end of the suction cup is hermetically sleeved on the front end of the vacuum tube and communicated with the through cavity of the vacuum tube, the needle driving mechanism is sealed and arranged at the rear end of the vacuum tube and It has an output shaft that protrudes into the through cavity and can slide back and forth. The needle is accommodated in the through cavity and its rear end is fixedly connected with the output shaft. A vacuum hole communicating with the through cavity is provided between them. The air extraction mechanism of the invention has simple structure and high air extraction efficiency. The invention also provides an air extraction device with the air extraction mechanism.

The invention provides a method for controlling an electric vacuum pump control method based on ECU (Electronic Control Unit) control. The method comprises the following steps of: detecting the vacuum degree of a vacuum booster in real time, and comparing with the upper and lower limits of a safety threshold value; and adjusting the vacuum degree of the vacuum booster according to a comparison result. Measures for adjusting the vacuum degree of the vacuum booster include starting the electric vacuum pump to assist the vacuum booster in generating a vacuum degree, and lowering an engine load to increase the vacuum degree. The control method can be implemented on the basis of an engine ECU by fully depending on the structure of the conventional vehicle model, so that the defects of excessive dependence on a mechanical structure and large modification on a vehicle existing in the conventional method are overcome, the cost is saved, and a better control effect can be achieved.

The invention provides a production method of rolled laminated metal composite roll, in which laminated metal composite blank is in vacuum state before assembling and rolling and in non-vacuum state in the hot rolling process. The method is characterized in that the inner end of an aluminum hollow pipe segment enters a reserved rolling extension space in the composite blank, the other end is connected with a vacuum pump; and the composite blank is evacuated through the vacuum pump and the pipe segment. The method can ensure the high vacuum degree in the composite blank before rolling, and can keep the internal junction surface of the composite blank clean and prevent oxidation. The method can ensure that air is discharged in time, thereby radically solving the problems of the prior art caused by the difficulty in discharging air in the composite blank, such as surface damages of the composite rolls or even damages to rolling equipment. The laminated metal composite material roll prepared by the method has the advantages of high strength, good mechanical processing performance, high corrosion resistance, high surface decorativeness, high quality and low production cost.

Methods and systems for providing vacuum to a vehicle are described. In one example, a method adjusts an engine air-fuel ratio in response to provide additional vacuum to the vehicle.