54results about How to "Short flow path" patented technology

The invention discloses a disposable safe vacuum blood sampling needle which relates to the technical field of medical appliances, comprises a blood taking needle (8), a cork puncturing needle (6) and a needle holder (4), and is characterized in that: the disposable safe vacuum blood sampling needle further comprises a main body (1), a needle holder sleeve (2), an embolism (3), a compressed spring (7), a retracted button (10) and a button spring (11), and the retracted button (10) can be pressed so as to lead the blood taking needle (8) to be retracted and hidden after blood sampling is finished. The disposable safe vacuum blood sampling needle has reasonable structure design, convenient assembly and reliable action, the needle holder (4) takes transparent material and is convenient for observing blood backflow, and the blood taking flow path is ultra-short, thus having minimal blood oxidation influence due to tiny amount of air and improving the accuracy of blood examination and analysis results; the blood taking needle (8) is retracted and hidden, thus ensuring that the medical care personnel is prevented from accident damages caused by a polluted needle tip, avoiding the pathophoresis of blood-borne diseases, providing safer working environments and more healthful and safer use for the medical care personnel, and being favorable for realizing real disposable usage.

The invention discloses a cyclone separator, which comprises an inner cylinder body (300) and an outer cylinder body (301), wherein an annular gap (302) is preserved between the outer wall of the inner cylinder and the inner wall of the outer cylinder; the lower end of the inner cylinder is an open end; the lower end of the outer cylinder is a closed end; the wall of the outer cylinder is provided with an air inlet (303); the upper end of the outer cylinder is provided air outlets (304); a return part is arranged between the upper end of the inner cylinder and the air outlet; an air flow enters the cyclone separator from the air inlet on the lower end of the outer cylinder along a tangential direction; one part of an air flow obtained after separation is discharged from the air outlet and the other part of the air flow obtained after separation passes through the annular gap from the return part to be separated again; and the returning air flow obtained after separation enters the inner cylinder to be mixed with a fresh incoming air flow for another time of separation. The invention also relates to a cyclone separation device consisting of the cyclone separator and a vacuum cleaner having the cyclone separation device. The vacuum cleaner of the invention is simple in structure and short in flow path of a single-separation air flow, realizes backflow and circulation and greatly improves separation efficiency while saving energy and protecting environment.

The invention relates to an electric motor (5) that has efficient self-cooling. The electric motor (5) comprises a rotor (8) that is rotatably mounted with respect to a stator (6). On a first sub-segment (23a) of an end face (19) of the rotor (8), a first air-guiding contour (20a) is formed that, during rotation of the rotor (8) in a reference rotation direction (R), generates an outwardly directed air flow (S). On a second sub-segment (23b) of the same end face (19), a second air-guide contour (20b) is formed that, during rotation of the rotor (8) in a reference rotation direction (R), generates an inwardly directed air flow (S).

The invention discloses a miniature injection molding machine with injection molding and plasticizing in coaxial line design. The miniature injection molding machine comprises an injection molding drive device, a grinding disc plasticizing device, a mold, a mold combination drive device and a clamping plate which are sequentially arranged on pull rods in a penetrating manner. The four pull rods penetrate four holes in each of the injection molding drive device, a base body, a fixed mold plate and the clamping plate in the whole machine, and the injection molding drive device, the base body, the fixed mold plate and the clamping plate are fixedly mounted on the specific positions of the pull rods, the four pull rods penetrate four holes in a movable mold plate, but the movable mold plate can move left and right on the four pull rods for achieving mold opening and mold closing. The miniature injection molding machine is simple and compact in structure, small in occupied space and more smooth in forming action; and melting charge plasticized by the miniature injection molding machine with injection and plasticizing in coaxial line design is directly gathered in a sleeve and is injected through a piston, the melting charge flowing path is short, thermal insulation of the melting charge is facilitated, and the quality of injection molding products can be guaranteed.

In a turbine (1) with several working blades assembled on the turbine shaft (8) assembled into a working blade group and several guide blades (14) connected to the turbine casing assembled into a guide blade group, in order to Particularly high efficiency is achieved in the case of a simple and reliable cooling of the turbine blades (12), (14). According to the invention, at least some of the guide vanes (14) have a coolant inlet (48) at their free end facing the turbine shaft (8).

The invention relates to the technical field of fuel cell manufacturing, in particular to a bipolar plate fluid inlet and outlet area, a bipolar plate and a fuel cell. The bipolar plate fluid inlet and outlet area comprises a first monopolar plate and a second monopolar plate which are arranged in an attached mode. A first cavity, a middle cavity, a flow channel cavity and a second cavity are formed between the first monopole plate and the second monopole plate. The first cavity, the middle cavity, the flow channel cavity and the second cavity are sequentially communicated. According to the bipolar plate fluid inlet and outlet area, fluid can directly flow into a distribution area of a polar plate flow field in the inlet area and directly flow out of the distribution area of the polar plate flow field in the outlet area, overturning is not needed, the flowing path of the fluid is shorter, the pressure loss is smaller, and the proportion of the effective area of the bipolar plate is increased.

The invention relates to a double-sided flow field for a polar plate for improving the material distribution uniformity of a fuel cell, the polar plate is formed by stamping a stainless steel flat plate, grooves sunken towards the inside of the plate surface are formed in the front surface and the back surface of the stainless steel plate, and ridges protruding towards the outside of the plate surface are arranged on the back surface corresponding to the grooves; and the reverse flow field is formed by sequentially arranging a column of flow fields or more than two columns of flow fields whichare sequentially arranged at intervals by long-strip-shaped bulges from top to bottom. The flow field is suitable for a thin plate stamping process, multi-stage disturbing fluid is arranged on the front face and the back face, and material distribution uniformity is good; the parallel arrangement structure improves the mass transfer efficiency; and mass transfer strengthening effect under the ridges of the parallelogram groove group is good.

The invention relates to the technical field of casting equipment, and discloses a vertical squeeze casting machine. The machine comprises a mold opening and closing device and an injection device, the mold opening and closing device comprises a rear mold plate, a fixed mold plate, a movable mold plate, an opening and closing assembly and a liquid filling assembly, in the casting process, the opening and closing assembly drives the movable mold plate to conduct mold closing or mold opening, and rapid mold locking is achieved; and in the mold closing state, the liquid filling assembly can conduct pressurization mold locking on the movable mold plate, the opening and closing assembly and the liquid filling assembly are separately controlled, the mold opening and closing time is greatly shortened, and the production efficiency is improved. The injection device comprises a base, an injection assembly and a feeding assembly, the fixed mold plate is provided with a liquid inlet in butt jointwith the injection assembly, and the injection assembly reciprocates between the feeding assembly and the liquid inlet. The feeding assembly independently provides molten metal for the injection assembly, then the injection assembly injects the molten metal into a metal impression to complete casting, the flowing path is short, gas is located on the molten metal, the gas entrapment phenomenon isreduced through injection from bottom to top, and the product quality is improved.

The invention discloses a plate type heat exchanger and a plate type laminated sheet of the plate type heat exchanger. The laminated sheet is provided with a p1 and a p2 are an inlet and an outlet holes, a p3 and a p4 are two isolation angle holes, adjacent laminations are oppositely arranged, and every pair of adjacent laminations is subjected to staggered heat exchange. If the n plate S1 and then +1 plate S2 flow refrigerant in a flowing region, the n-1 plateS1 and the n plate S2 region and the n+1 plate S1 region and the n+2 plate S2 region flow refrigerating fluid, and vice versa. Wherein, n is greater than or equal to 2, and n is an integer. Optimization lamination structure parameters are designed through design, so that the heat exchange performance is improved from the inlet pipeP1 to the outlet pipe P2, meanwhile, the flow path is shorter, therefore the flow resistance is reduced, so that the flow rate is increased, the heat exchange efficiency is further improved, and the power consumption of the water pump in the cooling sub-system can be reduced.

The invention discloses a grease injection device which comprises a device shell, two gears arranged in an inner cavity of the shell to form a gear pump structure and a grease bag fixed to the device shell and communicated with an oil suction cavity in the device shell. The grease bag comprises an upper connecting plate, a lower connecting plate and a tapered bag body fixed between the upper connecting plate and the lower connecting plate. The lower connecting plate is provided with an oil outlet for making an inner cavity of the tapered bag body communicated with the oil suction cavity of the device shell. According to the grease injection device, the grease bag and a pump body are combined into a whole, the grease flow path is short, the grease injection resistance is small, use is convenient, labor is saved, the grease in the tapered grease bag of the structure is fully sucked out conveniently, and the grease utilization rate can be increased.

The invention relates to a power cell casing and a power cell. The power cell casing is used for receiving a cell or a cell unit. The power cell casing is provided with a chamber structure for flowingof heat exchange liquid, wherein the chamber structure includes at least one water inlet channel and at least two water outlet channels extending in a longitudinal direction and multiple cooling water channels extending in a lateral direction, in the lateral direction, one water inlet channel is arranged between two adjacent water outlet channels, a set of heat exchange water channels is arrangedbetween the water inlet channel and the adjacent water outlet channel, each set of heat exchange water channels includes multiple heat exchange water channels, the multiple heat exchange water channels in the same set are in fluid communication in parallel between the water inlet channels and the adjacent water outlet channels, the casing includes a bottom plate used for fixing the cell or the cell unit, at least the water inlet channel and the heat exchange water channels are disposed on the bottom plate, and multiple turbulent structures spaced apart in the longitudinal direction are constructed in the water inlet channels. The power cell casing is advantaged in that the power cell casing can be both lightweight and with the heat exchange function for the single cell or the cell unit.

The invention discloses a miniature diaphragm pump with a precise flow adjusting device. The miniature diaphragm pump comprises a motor, a transmission assembly and a pump body. The pump body comprises a middle shell, a left shell, a right shell, a left diaphragm piece, a right diaphragm piece, a left air bin, a right air bin and a mixing bin, the left diaphragm piece is arranged between the middle shell and the left shell, the right diaphragm piece is arranged between the middle shell and the right shell, the middle shell is provided with a working bin, the left shell is provided with the left air bin, and the right shell is provided with the right air bin; the transmission assembly, the left diaphragm piece and the right diaphragm piece are arranged in the working bin, the motor sequentially drives the left diaphragm piece and the right diaphragm piece to reciprocate through the transmission assembly, external gas is sequentially squeezed into the left gas bin and the right gas bin, and gas in the left gas bin and the right gas bin flows into the mixing bin and then is output to the flow adjusting device through the mixing bin. The flow adjusting device comprises an adjusting motor, a speed adjusting assembly and an adjusting device, and the adjusting device is used for adjusting the flow. The miniature diaphragm pump is stable in flow, wide in measuring range and high in measuring precision.

The invention discloses a device for detecting an analyte in a liquid sample. The device comprises a cup body, a first receiving zone for receiving a liquid sample; a flow guide channel through whicha sample can be added or collected. The flow guide channel is communicated with the first receiving area, and the bottom surface of the flow guide channel is an inclined surface. The first receiving area and the flow guide channel are arranged in the cup body. The device further comprises a secondary sampling port. The flow guide channel is a groove. A second receiving area is arranged in the groove. The second receiving area comprises a corner area used for collecting secondary samples. The invention also discloses a use method of the device for detecting the analyte in the liquid sample. Thedevice can be used for detecting the existence or quantity of analytes in a liquid sample, and can still detect the liquid sample under the condition that the liquidity of the liquid sample is extremely poor and/or the sample amount is extremely small, and an operator can conveniently suck the liquid sample to carry out secondary confirmation detection.

The invention provides an air-cooled hydrogen fuel cell based on a single metal polar plate. The fuel cell comprises a metal polar plate and a reaction flow channel, the metal polar plate is the single metal polar plate, one side of the metal polar plate is provided with a cathode gas reaction flow channel and a cooling medium flow channel, the cathode gas reaction flow channel and the cooling medium flow channel are the same flow channel, and the other side of the metal polar plate is provided with an anode gas reaction flow channel. The structure and the system of the fuel cell are more compact, power density of the cell is improved, the cathode reaction gas flow channel provides excessive reaction gases, oxygen needed by reaction is provided, heat generated by reaction of the fuel cellis cooled, the structure of the fuel cell is simplified, welding of bipolar plates is avoided, and complexity of the fuel cell is simplified. An electric pile comprises a single cell, and the single cell is the air-cooled hydrogen fuel cell based on the single metal polar plate.

A liquid flow basification method and basification device are disclosed which belong to the technique field of chemical analysis. The volatile gas of strong base solution of the diisopropylamine dichloroacetate which penetrates the microporous polytetrafluoroethylene film is mixed with the flowing liquid to realize the auto basification of the liquid, and changes the flow speed to control the PH value. Said device contains: basification bottle and basification pool, the microporous polytetrafluoroethylene is mounted flatwise between the base plate and upper cover, the bore diameter is 20-100 mum, the imports and exports of liquid, flow cavity, basification bottle and the base plate are connected hermetically with the upper cover. The invention is used for the basification of liquid in the chemical analysis, flow circuit short, save time, save agent, avoid the cross contamination and improve the precision of analysis; and the device is simple in structure, easy to disassemble, convenient to maintain and clean, and good utilization effect.

The invention provides an electric heating wire seat. The electric heating wire seat comprises a seat body and an electric heating wire module embedded in the seat body, the electric heating wire module comprises a plate body, an electric heating wire module body fixedly arranged on the plate body and a heat insulation layer, the heat insulation layer is fixedly arranged on the lower surface of the plate body, a cavity with an upper opening is formed in the seat body, the electric heating wire module body is fixedly arranged in the cavity, the heat insulation layer makes contact with the cavity bottom of the cavity, and a decorative surface layer is installed at the upper opening of the cavity. The electric heating wire module is used for heating the seat body and the decorative surface layer after being electrified, a pressure sensor is arranged on the decorative surface layer, the pressure sensor is electrically connected with a processor, the processor is electrically connected witha controller, the controller is electrically connected with the electric heating wire module, and the controller controls the working condition of the electric heating wire module. The decorative surface layer is heated through the electric heating wires, and the comfort of a user is improved.