CN109821099B - Inflatable extrusion type infusion device - Google Patents
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Abstract
The invention relates to an inflatable extrusion type infusion device, and belongs to the field of medical instruments. The main body is provided with an upper inlet hole, a boss with an upper outlet cavity and at least two circular truncated cone groups of which the number of the circular truncated cones is reduced from left to right; an air bag and a medicine bag are arranged in the bag cavity of the main body, and a needle head and a flow valve are arranged on a medicine bag infusion tube; the base is provided with a lower inlet hole, a hole cavity with a lower outlet cavity, an air storage chamber communicated with the lower outlet cavity and a body cavity group consisting of body cavities; the upper inlet and lower outlet cavities and the valve plate form an upper inlet and lower outlet valve; the main body is arranged on the base, the partition board is pressed in the hole cavity by the boss, the piezoelectric driver is pressed in the body cavity by the circular truncated cone through the sealing ring and forms an upper compression cavity and a lower compression cavity with the main body and the base respectively, the upper compression cavity and the lower compression cavity in the same body cavity group are connected in parallel to form an upper compression cavity group and a lower compression cavity group respectively, and the upper compression cavity group and the lower compression cavity group are connected in series to form an upper compression unit and a lower compression; the upper inlet and outlet holes are respectively communicated with the air storage chamber through parallel and serial valves, the upper inlet hole is provided with an air inlet valve, and the upper outlet hole is communicated with an air bag with an air release valve through an output valve.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to an inflatable extrusion type infusion device.
Background
The injection administration mainly comprises intravenous injection, intramuscular injection, subcutaneous injection and the like. Intravenous injection is also called infusion administration, and most of the existing infusion devices are composed of an infusion bottle, an infusion tube and an infusion support, wherein the infusion bottle is hung on the infusion support, flows by the self weight of liquid medicine and is injected into a blood vessel of a person through the infusion tube. This infusion mode brings about many problems in practical use: the flow is adjusted by a manual method, and the flow control precision is insufficient; the patient needs to lift the infusion bottle by others when walking or going to the toilet, and the like, so that the movement is inconvenient and the blood can flow back when the height of the infusion bottle is not enough; the patient or the nursing staff is required to watch for a long time, and if the completion of the infusion is not found in time, accidents can be caused; the liquid medicine contacts with air, and the pollution possibility exists when the ambient air is unclean. In addition to the above direct problems, the infusion time is sometimes shortened by reducing the amount of solution, increasing the infusion speed, and the like, which not only burdens the heart, but also affects the therapeutic effect: the most important disadvantage of intramuscular injection and subcutaneous injection, which inject drugs into muscle or subcutaneous tissue in a relatively short time, is that the difference of blood drug concentration is large in one injection period, which is not favorable for effective absorption and utilization of drugs because: most drugs have a better concentration range in human body, and have toxic and side effects when the concentration of the drugs is too high, and have no treatment effect when the concentration of the drugs is too low. Therefore, a miniature portable controlled drug delivery device or system that can prolong the drug injection time and maintain reasonable drug concentration is urgently needed in the medical field.
Disclosure of Invention
The invention provides an inflatable extrusion type infusion device, which has the following implementation scheme: the bottom of the main body is provided with an upper inlet hole, a boss with an upper outlet cavity and an upper outlet hole and at least two circular table groups of which the number of the circular tables is reduced from left to right, one circular table of each circular table group is provided with an upper inlet cavity and an upper outlet hole, and other circular tables are only provided with upper vent holes; the upper inlet cavity in the leftmost circular table group is communicated with the upper inlet hole, and the upper outlet hole in the rightmost circular table group is communicated with the upper outlet hole through the upper outlet cavity; the upper air outlet hole and the upper vent hole in the same round table group are communicated through the upper communicating hole, and the upper oral cavity and the upper air outlet hole in two left and right adjacent round table groups are communicated; the air bag and the medicine bag are arranged in the bag cavity at the top of the main body, the end part of the bag cavity is provided with a baffle plate, the baffle plate is arranged in a chute on the side wall of the bag cavity, and a needle head and a flow valve are arranged on a liquid conveying pipe of the medicine bag; the base is provided with a lower inlet hole, a hole cavity with a lower outlet cavity, an air storage chamber communicated with the lower outlet cavity through the lower outlet hole, and a body cavity group and a body cavity which are respectively equal to the circular truncated cone group and the circular truncated cones contained in the circular truncated cone group in number, and the air storage chamber is provided with a left through hole and a right through hole; one body cavity in each body cavity group is provided with a lower inlet cavity and a lower air outlet, and other body cavities are only provided with lower vent holes; a lower inlet cavity in the leftmost body cavity group is communicated with a lower inlet hole, and a lower air outlet hole in the rightmost body cavity group is communicated with a lower outlet cavity; the lower air outlet hole and the lower vent hole in the same body cavity group are communicated through the lower communicating hole, and the lower inlet cavities and the lower air outlet holes in the other two left and right adjacent body cavity groups are communicated; the upper inlet and lower outlet cavities and the valve plates arranged in the upper inlet and lower inlet cavities respectively form an upper inlet and lower outlet valve, and the valve plates are cantilever beam valves or disc-shaped structures; the main body is arranged on the base through screws, and the boss presses the partition plate in the hole cavity through the O-shaped ring and separates the upper outlet cavity from the lower outlet cavity; the driver is pressed and connected in the body cavity through a sealing ring by the circular table, the sealing ring is positioned at the upper side and the lower side of the driver, the driver is composed of two piezoelectric vibrators and a gasket pressed and connected between the two piezoelectric vibrators, the piezoelectric vibrators are formed by bonding a substrate and piezoelectric sheets, and the piezoelectric sheets are arranged close to the gasket; the bending deformation directions of the two piezoelectric vibrators in the driver under the action of voltage are the same and represent the deformation direction of the driver; the driver, the sealing ring, the main body and the base respectively form an upper compression cavity and a lower compression cavity, the upper compression cavity and the lower compression cavity in the same body cavity group are respectively connected in parallel to form an upper compression cavity group and a lower compression cavity group, the upper compression cavity group and the lower compression cavity group are respectively connected in series to form an upper compression unit and a lower compression unit, and the upper compression unit and the lower compression unit are connected in; the upper inlet hole is communicated with the air storage chamber through a pipeline, a series valve and a left through hole, and the upper inlet hole is provided with an air inlet valve through a pipeline; the upper outlet hole is communicated with the air storage chamber through a pipeline, a parallel valve and a right through hole, the upper outlet hole is communicated with the air bag through a pipeline and an output valve, the air bag is also provided with an air release valve through a pipeline, and the series valve, the air inlet valve, the parallel valve, the output valve and the air release valve are all switch valves; in operation, the deformation directions of the drivers in the same body cavity group are the same, and the deformation directions of the drivers in two adjacent body cavity groups are opposite; the upper and lower compression units respectively perform progressive accumulation compression on the gas and then alternately discharge the gas from the upper and lower outlets.
Take infusion set who has three upper and lower compression chamber group as an example, from right side to left, round platform group defines in proper order for round platform group one, two and three, and body cavity group defines in proper order for body cavity group one, two and three, and upper inlet valve defines in proper order for upper inlet valve one, two and three, and lower inlet valve defines in proper order for lower inlet valve one, two and three, and upper compression chamber group defines in proper order for upper compression chamber group one, two and three, and lower compression chamber group defines in proper order for lower compression chamber group one, two and three, then specific working process is: in the upper half cycle, the drivers in the first and third body cavity groups bend downwards, the driver in the second body cavity group bends upwards, the first and third upper inlet valves, the second and lower outlet valves are opened, the second and upper outlet valves and the first and third lower inlet valves are closed, the first and third upper compression cavities suck gas, and the first and third lower compression cavities discharge gas, which is an upper suction and lower discharge process; in the lower half cycle, the drivers in the first and third body cavity groups bend upwards, the drivers in the second body cavity group bend downwards, the first and third upper inlet valves, the second and lower inlet valves and the lower outlet valves are closed, the second and upper outlet valves and the first and third lower inlet valves are opened, the first and third upper compression cavity groups and the second and lower compression cavity groups discharge gas, and the second and lower compression cavity groups and the first and third lower compression cavity groups suck gas, which is an upper-discharge and lower-suction process; in the working process, gas is subjected to the progressive accumulated compression of the upper compression cavity group III, the upper compression cavity group II and the lower compression cavity group I and then is alternately discharged from the upper or lower outlet holes; when the series valve and the air release valve are closed and the air inlet valve, the parallel valve and the output valve are opened, the upper compression unit and the lower compression unit are connected in parallel to output high flow, and the device is suitable for occasions of high-speed transfusion of low-viscosity liquid medicine; when the air inlet valve, the parallel valve and the air release valve are closed, and the serial valve and the output valve are opened, the upper compression unit and the lower compression unit are connected in series for output, the pressure is high, and the device is suitable for occasions of high-pressure transfusion of high-viscosity liquid medicine; when the upper compression unit and the lower compression unit are connected in series for output, the series valve and the output valve are closed, the air inlet valve and the parallel valve are opened, the upper compression unit and the lower compression unit are firstly connected in parallel for output, and the state of the relevant switch valve is changed after the pressure in the air storage chamber rises to a set value, so that the upper compression unit and the lower compression unit are connected in series for output; after the gas compressed step by step enters the air bag, the volume of the air bag is increased and the medicine bag is extruded, the internal pressure of the medicine bag is increased to force the liquid medicine to be output through a liquid conveying pipe, and the output flow is regulated through the driving voltage or flow valve of the piezoelectric vibrator; after the transfusion is finished, the air release valve is opened to release the air in the air bag and the medicine bag is replaced.
In the invention, the number of compression cavity groups contained in the upper and lower compression units is equal, the number of upper and lower compression cavities contained in the same body cavity group is equal, and the heights and the radiuses of the upper and lower compression cavities are respectively equal; the pressure output by the upper compression unit and the lower compression unit in series is 2 times of the pressure output by the upper compression unit and the lower compression unit in parallel, the pressure output by the upper compression unit and the lower compression unit in parallel is equal to the output pressure when the upper compression unit works alone, and the maximum value of the pressure output by the upper compression unit and the pressure output by the lower compression unitmax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0Is standard atmospheric pressure, etapAlpha > 0 is a compression ratio, i.e., a ratio of a volume change amount of the upper compression chamber to a volume of the upper compression chamber due to deformation of the piezoelectric vibrator, and beta > 1 is an efficiency coefficientThe minimum value of the number ratio of the upper compression cavities contained in each adjacent upper compression cavity group, wherein n is more than or equal to 2 and is the number of the upper compression cavity groups contained in the upper compression unit; in operation, when two adjacent upper compression cavity groups are communicated with each other, namely when a valve plate between the two adjacent upper compression cavity groups is opened, the volume variation of the upper compression cavity group with a large number of upper compression cavities is not less than the volume variation of the upper compression cavity group with a small number of upper compression cavities; in order to obtain the maximum compression ratio, the height of the upper compression cavity is equal to the deformation of the central point of the piezoelectric vibrator, and the height of the upper compression cavity is equal to that of the piezoelectric vibrator when the piezoelectric vibrator is formed by bonding a PZT4 wafer with equal thickness and a brass substrate
ηh、U0Respectively dynamic correction factor and drive voltage, d31Is the piezoelectric constant, hpAnd r is the radius of the upper compression cavity, wherein the thickness of the piezoelectric sheet is shown as r.
Advantages and features: the gas pressure can be greatly improved by utilizing an accumulative compression method; the gas is used for driving the liquid medicine, so that the transfusion speed is easy to be accurately controlled through the driving voltage, a hanging device is not needed, and the liquid medicine is convenient to move and carry; the liquid medicine does not contact with the air, the phenomena of liquid medicine pollution, gas entering blood vessels, blood backflow and the like can not occur, real-time watching is not needed, and the device is safe and reliable.
Drawings
FIG. 1 is a schematic cross-sectional view of the components of an infusion set in accordance with a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a main body according to a preferred embodiment of the present invention;
FIG. 4 is a bottom view of FIG. 3;
FIG. 5 is a schematic structural diagram of a base in accordance with a preferred embodiment of the present invention;
FIG. 6 is a top view of FIG. 6;
FIG. 7 is a schematic diagram of the structure of the driver in a preferred embodiment of the present invention;
fig. 8 is a schematic view of the infusion set in operation in accordance with a preferred embodiment of the present invention.
Detailed Description
The bottom of the main body a is provided with an upper inlet hole a1, a boss a3 with an upper outlet cavity a6 and an upper outlet hole a0 and at least two circular truncated cone groups Ai formed by circular truncated cones a2, and the number of the circular truncated cones a2 contained in each circular truncated cone group Ai is reduced in sequence from left to right; one round platform a2 of each round platform group Ai is provided with an upper inlet cavity a4 and an upper air outlet hole a5, and other round platforms a2 are only provided with upper vent holes a 8; the upper inlet cavity a4 in the leftmost circular truncated cone group Ai is communicated with an upper inlet hole a1, and the upper outlet hole a5 in the rightmost circular truncated cone group Ai is communicated with an upper outlet hole a0 through an upper outlet cavity a 6; the upper air outlet holes a5 and the upper air vent holes a8 in the same round table group Ai are communicated through the upper communication holes a7, and the upper inlet holes a4 and the upper air outlet holes a5 in two left and right adjacent round table groups Ai are communicated; the upper inlet cavity a4, the upper outlet cavity a6 and a valve plate e arranged in the upper inlet cavity a6 form an upper inlet valve vi and an upper outlet valve v respectively, and the valve plate e is a cantilever beam valve or a disc-shaped structure; a balloon cavity a9 at the top of the main body a is internally provided with a balloon x1 and a medicine bag x2, the end part of the balloon cavity a9 is provided with a baffle j, the baffle j is arranged in a chute a10 on the side wall of the balloon cavity a9, and a transfusion tube q of the medicine bag x2 is provided with a needle and a flow valve m; the base b is provided with a lower inlet hole b1, a hole cavity b3 with a lower outlet cavity b6, an air storage chamber b9 communicated with the lower outlet cavity b6 through a lower outlet hole b0, a body cavity group Bi and a body cavity b2 which are respectively equal to the number of the round table group Ai and the round tables a2 contained in the round table group Ai, and the air storage chamber b9 is provided with a left through hole b10 and a right through hole b 11; one body cavity b2 in each body cavity group Bi is provided with a lower inlet cavity b4 and a lower air outlet hole b5, and the other body cavity b2 is only provided with a lower vent hole b 8; the lower inlet cavity b4 in the leftmost body cavity group Bi is communicated with the lower inlet hole b1, and the lower outlet hole b5 in the rightmost body cavity group Bi is communicated with the lower outlet cavity b 6; the lower air outlet b5 and the lower vent hole b8 in the same body cavity group Bi are communicated through a lower communication hole b7, and the lower inlet cavities b4 and the lower air outlet b5 in the other two left and right adjacent body cavity groups Bi are communicated; the lower inlet chamber b4, the lower outlet chamber b6 and a valve plate e arranged in the lower inlet chamber b4 and the lower outlet chamber b6 form a lower inlet valve Vi and a lower outlet valve V respectively; the main body a is arranged on the base b through screws, and the boss a3 presses the partition plate p in the hole cavity b3 through an O-shaped ring and separates the upper outlet cavity a6 from the lower outlet cavity b 6; the round table a2 crimps the driver D in the body cavity b2 through a sealing ring, the sealing ring is positioned at the upper side and the lower side of the driver D, the driver D is composed of two piezoelectric vibrators D and a gasket D 'crimped between the two piezoelectric vibrators D, the piezoelectric vibrator D is formed by bonding a substrate D1 and a piezoelectric sheet D2, the piezoelectric sheet D2 is installed close to the gasket D', and the surface of the piezoelectric vibrator D is coated with insulating paint or bonded with an insulating film; the bending deformation directions of the two piezoelectric vibrators D in the driver D under the action of the voltage are the same and represent the deformation direction of the driver D; the driver D, the sealing ring, the main body a and the base b respectively form an upper compression cavity C and a lower compression cavity C, the upper compression cavities C in the same body cavity group Bi are connected in parallel to form an upper compression cavity group Ci, the lower compression cavities C are connected in parallel to form a lower compression cavity group Ci, the upper compression cavity group Ci is connected in series to form an upper compression unit, the lower compression cavity group Ci is connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in parallel; the upper access hole a1 is communicated with an air storage chamber b9 through a pipeline, a series valve z1 and a left through hole b10, and an air inlet valve z2 is installed at the upper access hole a1 through a pipeline; the upper outlet hole a0 is communicated with an air storage chamber b9 through a pipeline, a parallel valve y1 and a right through hole b11, the upper outlet hole a0 is communicated with an air bag x1 through a pipeline and an output valve y2, the air bag x1 is also provided with a deflation valve y3 through a pipeline, and the series valve z1, the air inlet valve z2, the parallel valve y1, the output valve y2 and the deflation valve y3 are all switch valves; in operation, the deformation directions of the drivers D in the same body cavity group Bi are the same, and the deformation directions of the drivers D in two adjacent body cavity groups Bi are opposite; the upper and lower compression units respectively perform progressive cumulative compression on the gas and alternately discharge the gas from the upper outlet a0 or the lower outlet b 0.
In the invention, i in a circular truncated cone group Ai, a body cavity group Bi, an upper inlet valve Vi, a lower inlet valve Vi, an upper compression cavity group Ci and a lower compression cavity group Ci represents a serial number from right to left, and i is 1, 2 and 3; n of the gas pipe in represents a serial number, and n is 1 and 2; taking an infusion device with three upper compression cavity groups Ci and three lower compression cavity groups Ci as an example, from right to left, the circular truncated cone groups Ai are sequentially defined as circular truncated cone groups a1, two a2 and three A3, the body cavity groups Bi are sequentially defined as body cavity groups B1, two B2 and three B3, the upper inlet valves Vi are sequentially defined as upper inlet valves one V1, two V2 and three V3, the lower inlet valves Vi are sequentially defined as lower inlet valves one V1, two V2 and three V3, the upper compression cavity groups Ci are sequentially defined as upper compression cavity groups one C1, two C2 and three C3, and the lower compression cavity groups Ci are sequentially defined as lower compression cavity groups one C1, two C2 and three C3, so that the specific working process is as follows: in the upper half cycle, the drivers D in the body cavity group I B1 and the body cavity group III B3 bend downwards, the drivers D in the body cavity group II B2 bend upwards, the upper inlet valves I V1 and III V3, the lower inlet valve II V2 and the lower outlet valve V are opened, the upper inlet valve II V2, the upper outlet valve V and the lower inlet valve I V1 and III V3 are closed, the upper compression cavity group I C1 and III C3 and the lower compression cavity II C2 suck gas, and the upper compression cavity group II C2, the lower compression cavity I C1 and III C3 discharge gas, wherein the upper suction process and the lower discharge process are carried out; in the lower half cycle, the driver D in the first body cavity group B1 and the third body cavity group B3 bends upwards, the driver D in the second body cavity group B2 bends downwards, the first upper inlet valve V1 and the third upper inlet valve V3, the second lower inlet valve V2 and the lower outlet valve V are closed, the second upper inlet valve V2, the first upper outlet valve V and the first lower inlet valve V1 and the third upper inlet valve V3 are opened, the first upper compression cavity group C1 and the third compression cavity C3 and the second lower compression cavity C2 exhaust gas, and the second upper compression cavity group C2, the first lower compression cavity C1 and the third compression cavity C3 suck gas, which is an upward-sucking and downward sucking process; during the operation, the gas is alternately discharged from the upper outlet hole a0 or the lower outlet hole b0 after undergoing the progressive accumulated compression of the upper compression chamber group three C3, two C2 and one C1 or the lower compression chamber group three C3, two C2 and one C1; when the series valve z1 and the air release valve y3 are closed and the air inlet valve z2, the parallel valve y1 and the output valve y2 are opened, the upper and lower compression units output in parallel and have large flow, so that the infusion set is suitable for occasions of high-speed infusion of low-viscosity liquid medicine; when the air inlet valve z2, the parallel valve y1 and the air release valve y3 are closed and the series valve z1 and the output valve y2 are opened, the upper compression unit and the lower compression unit are connected in series for output and have high pressure, so that the device is suitable for occasions of high-pressure transfusion of high-viscosity liquid medicine; when the upper compression unit and the lower compression unit are output in series, the series valve z1 and the output valve y2 are closed, the air inlet valve z2 and the parallel valve y1 are opened, the upper compression unit and the lower compression unit are output in parallel, and after the pressure in the air storage chamber b9 rises to a set value, the state of the relevant switch valve is changed, so that the upper compression unit and the lower compression unit are output in series; after the gradually compressed gas enters the air bag x1, the volume of the air bag x1 is increased and the medicine bag x2 is extruded, the internal pressure of the medicine bag x2 is increased to force the liquid medicine to be output through the infusion tube q, and the output flow is regulated through the driving voltage or flow valve m of the piezoelectric vibrator d; after the transfusion is finished, the air release valve y3 is opened to release the air in the air bag x1 and the medicine bag x2 is replaced.
In the invention, the number of the upper compression cavity groups Ci contained in the upper compression unit is equal to that of the lower compression cavity groups Ci contained in the lower compression unit, the number of the upper compression cavities C contained in the same body cavity group Bi is equal to that of the lower compression cavities C, and the heights and the radiuses of the upper compression cavities C and the lower compression cavities C are respectively equal; the upper and lower compression units are connected in seriesThe output pressure is 2 times of the pressure output in parallel, the pressure output in parallel is equal to the output pressure when the upper compression unit works alone, and the maximum value is Pmax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0Is standard atmospheric pressure, etapFor the efficiency coefficient, alpha is more than 0 and is the compression ratio, namely the ratio of the volume change quantity of the upper compression cavity c caused by the deformation of the piezoelectric vibrator d to the volume of the upper compression cavity c, beta is more than 1 and is the minimum value of the ratio of the number of the upper compression cavities c contained in each adjacent upper compression cavity group ci, and n is more than or equal to 2 and is the number of the upper compression cavity groups ci contained in the upper compression unit; in operation, when two adjacent upper compression cavity groups ci are communicated with each other, that is, when a valve plate e between the two upper compression cavity groups is opened, the volume variation of the upper compression cavity group ci with a large number of upper compression cavities c is not less than the volume variation of the upper compression cavity group ci with a small number of upper compression cavities c; in order to obtain the maximum compression ratio, the height of the upper compression cavity c is equal to the deformation of the central point of the piezoelectric vibrator d, and the height of the upper compression cavity c is equal to that of the piezoelectric vibrator d when the piezoelectric vibrator d is formed by bonding a PZT4 wafer with equal thickness and a brass substrate
ηh、U0Respectively dynamic correction factor and drive voltage, d31Is the piezoelectric constant, hpR is the radius of the upper compression chamber c, which is the thickness of the piezoelectric sheet d 2.
Claims (1)
1. The utility model provides an aerify extrusion formula infusion set which characterized in that: the main body is provided with an upper inlet hole, a boss with an upper outlet cavity and an upper outlet hole and at least two circular table groups of which the number of the circular tables is reduced from left to right, one circular table of each circular table group is provided with an upper inlet cavity and an upper outlet hole, and other circular tables are only provided with upper vent holes; the upper inlet cavity in the leftmost circular table group is communicated with the upper inlet hole, and the upper outlet hole in the rightmost circular table group is communicated with the upper outlet hole through the upper outlet cavity; the upper air outlet hole and the upper vent hole in the same round table group are communicated through the upper communicating hole, and the upper oral cavity and the upper air outlet hole in two left and right adjacent round table groups are communicated; the air bag and the medicine bag are arranged in the bag cavity of the main body, the baffle is arranged at the end part of the bag cavity, and the transfusion tube of the medicine bag is provided with a needle head and a flowA valve; the base is provided with a lower inlet hole, a hole cavity with a lower outlet cavity, an air storage chamber communicated with the lower outlet cavity through the lower outlet hole, and a body cavity group and a body cavity with the same number as the circular truncated cones in the circular truncated cone group and the circular truncated cones contained in the circular truncated cone group; one body cavity in each body cavity group is provided with a lower inlet cavity and a lower air outlet, and other body cavities are only provided with lower vent holes; a lower inlet cavity in the leftmost body cavity group is communicated with a lower inlet hole, and a lower air outlet hole in the rightmost body cavity group is communicated with a lower outlet cavity; the lower air outlet hole and the lower vent hole in the same body cavity group are communicated through the lower communicating hole, and the lower inlet cavities and the lower air outlet holes in the other two left and right adjacent body cavity groups are communicated; the upper inlet and lower outlet cavities and the valve plates arranged in the upper inlet and lower outlet cavities respectively form an upper inlet and lower outlet valve; the main body is arranged on the base, the partition board is pressed and connected in the hole cavity through the boss, the driver is pressed and connected in the body cavity through the circular truncated cone through the sealing ring, and the driver consists of two piezoelectric vibrators and a gasket pressed and connected between the two piezoelectric vibrators; the driver, the sealing ring, the main body and the base respectively form an upper compression cavity and a lower compression cavity, the upper compression cavity and the lower compression cavity in the same body cavity group are respectively connected in parallel to form an upper compression cavity group and a lower compression cavity group, the upper compression cavity group and the lower compression cavity group are respectively connected in series to form an upper compression unit and a lower compression unit, and the upper compression unit and the lower compression unit are connected in; the maximum value of the output pressure of the upper compression unit is P when the upper compression unit works alonemax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0Is standard atmospheric pressure, etapThe efficiency coefficient is alpha, the compression ratio is beta, the minimum value of the ratio of the number of the upper compression cavities contained in each adjacent upper compression cavity group is beta, and n is the number of the upper compression cavity groups contained in the upper compression unit; the upper inlet hole is communicated with the air storage chamber through a pipeline and a series valve, and the upper inlet hole is provided with an air inlet valve through a pipeline; the upper outlet hole is communicated with the air storage chamber through a pipeline and a parallel valve, the upper outlet hole is communicated with the air bag through a pipeline and an output valve, and the air bag is provided with an air release valve through a pipeline.
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| CN201910191213.XA CN109821099B (en) | 2019-03-01 | 2019-03-01 | Inflatable extrusion type infusion device |
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| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
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| IL138766A0 (en) * | 2000-09-28 | 2001-10-31 | Cyclo Science Ltd | Constant pressure apparatus for the administration of fluids intravenously |
| US9333293B2 (en) * | 2007-05-09 | 2016-05-10 | Acist Medical Systems, Inc. | Injector device, method, and computer program product for detecting a vacuum within a syringe |
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|---|---|---|---|---|
| CN1225023A (en) * | 1996-07-05 | 1999-08-04 | 诺沃挪第克公司 | Dose setting device |
| CN2673410Y (en) * | 2004-02-14 | 2005-01-26 | 王新明 | External wound serious patient fast pressurized transfusion device |
| CN101528285A (en) * | 2006-10-26 | 2009-09-09 | 马林克罗特公司 | Medical fluid injector having a thermo-mechanical drive |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
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