30results about How to "Easy to change liquid" patented technology

A microfluidic chip, a device and method for microfluidic manipulation of precise quantitative biological samples. The present invention proposes a brand-new digitally operable device and method for the microfluidic operation of biological samples. The digital droplet flowmeter integrated in the microfluidic chip realizes the precise quantification of liquid inhalation and removal for the first time, and can be repeatedly loaded with the external With the use of advanced pressure mechanism and valve, the liquid concentration gradient around the biological sample can be continuously adjusted by means of digital droplet generation, thereby realizing continuous digital liquid dilution, and quantitatively controlling the liquid in contact with the biological sample during freezing and thawing. The amount can greatly improve the activity of cells and samples during the freezing and thawing of biological samples.

A super-hydrophobic micro-pit array chip, a preparation method therefor, and applications thereof. The micro-pit array chip comprises a micro-pit array layer, and the surface on which micro-pits are formed, of the micro-pit array layer is a super-hydrophobic surface except micro-pits or the bottoms of the micro-pits. The micro-pit array chip may be: 1) the surface except the micro-pits is the super-hydrophobic surface, and the micro-pit array chip comprises the micro-pit array layer and a super-hydrophobic layer attached to the surface of the micro-pit array layer; and 2) the surface except the bottoms of the micro-pits is a super-hydrophobic surface, the micro-pit array layer comprises a substrate layer and a micropore array layer attached to the surface of a substrate, and micropore array layer is made of a super-hydrophobic material. By means of the micro-pit array chip, complete isolation among cell microarrays can be implemented at a very low cost in the cell microarray construction process, cross contamination among cell arrays is avoided, good biocompatibility is ensured, and the micro-pit array chip has no obvious impact on normal growth of various cells and is suitable for high-throughput cell detection and analysis.

The invention provides a multi-cavity infusion bag capable of being zoned and automatically changing medicines conveniently. The infusion bag comprises an infusion bag main body (1), a bag cavity bottom cover (2), a rotary outlet transformation device (3) and a liquid pipe (4), wherein the infusion bag main body (1) is a plastic bag which is used for storing medicine liquid; a separation film is arranged in the plastic bag, so that a cavity body is uniformly divided into at least two parts; at least two liquid filling ports (5) are formed in the top of the cavity body; the bag cavity bottom cover (2) is in threaded connection to an opening in the bottom of the infusion bag main body (1); at least two fan-shaped openings, which correspondingly communicate a plurality of cavity zones, are formed in the bottom of the bag cavity bottom cover (3); the rotary outlet transformation device (3) is a cake-shaped structural body; a fan-shaped opening is formed in the cake; and the fan-shaped opening is not greater than the fan-shaped openings in the bag cavity bottom cover (2) in radius and radian. The infusion bag is quite simple and convenient to conduct a liquid changing operation, which can be automatically operated by a patient and family members thereof, without the participation of professional nursing personnel; and the infusion bag is low in cost and broad in application scope.

The invention discloses an air purifier, comprising a purifier main body, the lower end surface of the purifier main body is fixedly connected with a bearing plate, the lower end surface of the bearing plate is fixedly connected with a support base plate, and the support base plate and the purifier main body A cleaning device is slidably connected between them, the lower part of the side end surface of the purifier main body is provided with an air inlet, the edge of the upper end surface of the purifier main body is provided with an air outlet, and the middle part of the upper end surface of the purifier main body is embedded with a control device , the lower end surface of the control device is fixedly equipped with a drainage fan, the lower end surface of the drainage fan is fixedly connected with a transmission main shaft, the transmission main shaft rotates coaxially with the drainage fan, and the side end surface of the transmission main shaft is fixedly connected with a driving gear, The side end surface of the drive shaft is slidably connected with a rotating filter device, which can realize high-efficiency filtration of the purifier and self-cleaning of the filter screen, and the device is convenient to use and has a high energy utilization rate.

The invention discloses a novel oral cold compress bag. The novel oral cold compress bag comprises a connecting chamber, wherein one side of an inner cavity of the connecting chamber is fixedly connected with a spring, the end, away from the inner cavity of the connecting chamber, of the spring is fixedly connected with a movable plate, one side of the movable plate is fixedly connected with a movable rod, the end, away from the movable plate, of the movable rod penetrates through the connecting chamber and extends to the outer portion of the connecting chamber, the end, extending to the outerportion of the connecting chamber, of the movable rod is fixedly connected with a push plate, and the side, located on the bottom of the movable rod, of the inner cavity of the connecting chamber isinner cavity of the connecting chamber is fixedly connected with a positioning plate. The invention relates to the technical field of medical auxiliary instruments. The novel oral cold compress bag has the advantages that when the temperature of liquid in the cold compress bag is not up to standard, auxiliary tools are not needed, the liquid in the cold compress bag can be replaced very conveniently through manual operation, thereby providing convenience for a user to use the cold compress bag and ensuring the cold compress effect well, the length of the cold compress bag can be adjusted appropriately, and the cold compress bag can be applied to oral cavities with different sizes, thereby increasing the application range of the cold compress bag.

The invention provides a bipolar battery stack. A tubular liquid injection channel is formed by a monopolar sheet and a liquid port located at the same position on the bipolar sheet, and a liquid injection channel is arranged in the liquid injection channel of the bipolar cell stack. and sealing device. The liquid injection and sealing device includes a cylinder with a liquid injection port. The cylinder is a movable cylinder that can rotate or move up and down. The rotation or movement of the movable cylinder realizes the connection between the liquid injection port and the bipolar electrode sheet The communication or staggering of the electrolyte flow channel; or, the cylinder is a fixed cylinder fixed in the liquid injection channel, and the liquid injection port of the fixed cylinder is communicated with the electrolyte flow channel of the bipolar electrode sheet, and in the fixed cylinder A movable member is provided, and the liquid injection port can be opened or closed through the rotation or up and down movement of the movable member in the fixed cylinder. The use of the liquid injection and sealing device can not only effectively complete the injection of the electrolyte, but also effectively solve the problem of the internal short circuit of the battery stack caused by the liquid contact of the electrolyte through the liquid injection channel.

The invention discloses an emergency transfusion device, which comprises a placement frame, on which a switching piece is installed, the switching piece includes a fixed part and a rotating part rotatably arranged on the fixing part, a butt joint flow channel is arranged in the rotating part, and a connecting flow channel is formed on the rotating part There is a lower puncture part, and a plurality of connecting flow channels arranged at intervals along the rotation path are arranged on the fixed part corresponding to the rotation path of the docking flow channel, and the rotation of the rotating part realizes the separate communication between the docking flow channel and each connecting flow channel Each connecting flow channel is connected with an upper bottle stopper piercer, and a plurality of placement cavities for placing infusion bottles are formed on the placement frame above the switching piece. The placement frame is provided with a driving member for driving the rotation of the rotating part. The transmission between the component and the rotating part is detachable. The present invention has the following advantages and effects: the present invention enables the patient to perform the fluid change operation without troublesome medical personnel, and the fluid replacement operation is simple, thereby greatly reducing the workload of the medical personnel.

The invention discloses a method for washing insulin crystals or insulin analog crystals. The method uses a hollow fiber membrane to treat insulin crystal suspension or insulin analog crystal suspension, and effectively combines crystal washing, liquid exchange and crystal suspension concentration, which enhances the washing effect, and the product has low solvent residue and ignition residue; it can realize continuous Automatic operation, simple process, convenient operation, improved process stability and production efficiency, especially suitable for large-scale industrial production.

The invention relates to the technical field of cell culture, and more particularly relates to a full-automatic intelligent culture box and a control method thereof. The full-automatic intelligent culture box comprises a controller, a box body (3), a first adjusting device, a second adjusting device, a first fixed seat, a second fixed seat (4), a gun-head fixed seat, a waste-gun-head recovering device and a liquid removing device (5), wherein the box body (3) is at least provided with a culture-medium storage cavity (1) and a cell culture cavity (2); the first adjusting device is arranged in the culture-medium storage cavity (1) and is used for controlling the environmental state; the second adjusting device is arranged in the cell culture cavity (2) and is used for controlling the environmental state; the first fixed seat is arranged in the culture-medium storage cavity (1) and is used for fixing a culture-medium bottle; the second fixed seat (4) is arranged in the cell culture cavity and is used for fixing a cell culture bottle; the gun-head fixed seat is arranged in the box body (1); the waste-gun-head recovering device is arranged in the box body (1); and the liquid removing device (5) is arranged in the box body (1) and is used for automatically taking and replacing a gun head and further automatically replacing a culture medium in the cell culture bottle. The full-automatic intelligent culture box is convenient, fast and accurate and has no influence on cell growth.

The invention relates to a pipette head for rapid liquid replacing of suspension cells. The pipette head comprises a pipette head body (1), a sucker (2) and a pipette connector (3). The sucker (2) is arranged at one end of the pipette head body (1), and the pipette connector (3) is arranged at the other end of the pipette head body (1). The end face of the sucker (2) is in an arc shape. A filter element (21) is arranged in the sucker (2). The structure with the filter element is adopted, the filter element can prevent the cells from being sucked away in the nutrient solution absorbing process, and the cells are left in a culture vessel. In addition, the hole diameter of the filter element is smaller than the hole diameter of common suspension cells, and the cells are prevented from being filtered out; furthermore, to avoid the cells from blocking filter holes or adhering onto the filter holes, concave-convex small holes are designed in filtering holes. The problem that liquid replacing of the suspension cells is different and slow is solved. According to the pipette head, the liquid replacing time of the suspension cells is shortened, the damage and loss of the cells are reduced, and convenient and fast liquid replacing can be carried out on the suspension cells.