Fluid conveying device for controlling multiple valves based on pulses

Abstract

The invention discloses a fluid conveying device for controlling multiple valves based on pulses, which comprises a liquid storage device, a flow feeder, a first fluid channel, a second fluid channel, a first valve, a second valve and a power supply circuit, the power circuit comprises a first control branch configured to control the first valve to drive the first fluid channel to be closed when the first valve is in a first pulse current, and a second control branch configured to control the second valve to drive the second fluid channel to be closed when the second valve is in a second pulse current opposite to the first pulse current in polarity. The flow supplier receives a predetermined volume of fluid from the reservoir via the first fluid passage when the second fluid passage is closed, and provides the predetermined volume of fluid to a target via the second fluid passage when the first fluid passage is closed. In this case, not only can the safety constraint be realized when the single valve is controlled, but also the interference among a plurality of fluid channels when the single valve is controlled can be reduced, thereby improving the accuracy of dosing.

Description

Technical Field

[0001] The present disclosure generally relates to the field of medical devices, and more particularly to a fluid delivery device based on pulse control of multiple valves. Background Art

[0002] Many chronic diseases often cause corresponding complications. For example, chronic diabetes can cause complications related to blood sugar. In order to delay and reduce the rapid or persistent impact of chronic diseases on patients, automatic injection of drugs can be used on patients. Among the existing drug delivery technologies, portable drug delivery systems are widely used. They usually require a subcutaneous tube to be implanted. When the abnormality of the patient's physiological characteristics reaches a warning level, the patient can input the dose of the injected drug through the controller and connect the drug pump filled with the drug solution to the previously reserved tube for drug delivery.

[0003] In the prior art, the patent with the announcement number CN107405446B discloses a medical device including an infusion device, which drives the fluid through a driving wheel, a screw and a plunger, and distributes the fluid through a clutch mechanism in cooperation with the driving wheel to administer the drug. Although the prior art can achieve the purpose of quantitative administration, it lacks safety constraints in directly driving the fluid to be infused into the human body, and does not meet the safety requirements in special circumstances, such as when a control instruction goes wrong, resulting in an incorrect infusion amount of drugs such as insulin, which affects the health of the patient and even endangers his life.

[0004] The patent with the announcement number CN101808681B discloses a wearable infusion device, which establishes a first fluid path between a reservoir and a pump when in a first position through a first controller, and establishes a second fluid path between a pump and an outlet when in a second position, and actuates the pump only when the first controller has established the second fluid path through the second controller, thereby enabling quantitative administration while forming a safety constraint. However, the prior art uses a single slide valve to control multiple fluid paths or channels, and interference is easily sent at the critical point of fluid path or channel switching due to insufficient sealing, which is not conducive to accurate quantitative administration. Summary of the invention

[0005] The present disclosure is proposed in view of the above-mentioned situation, and its purpose is to provide a fluid delivery device based on pulse control of multiple valves, which can not only achieve the safety constraints of single-body valve control, but also reduce the interference between multiple fluid channels during single-body valve control, thereby improving the accuracy of quantitative drug delivery.

[0006] To this end, the present disclosure provides a fluid delivery device based on pulse control of multiple valves, including a reservoir for storing fluid, a flow supplier for receiving or providing a predetermined volume of fluid by changing its volume, a first fluid channel connecting the reservoir and the flow supplier, a second fluid channel connecting the flow supplier and guiding the fluid from the flow supplier to a target, a first valve arranged in the first fluid channel, a second valve arranged in the second fluid channel, and a power supply circuit for providing a pulse current to the first valve and the second valve, the power supply circuit including a first control branch configured to control the first valve to drive the first fluid channel to close when the power supply circuit outputs a first pulse current and a second control branch configured to control the second valve to drive the second fluid channel to close when the power supply circuit outputs a second pulse current with a polarity opposite to that of the first pulse current, the flow supplier receives the predetermined volume of fluid from the reservoir via the first fluid channel when the second fluid channel is closed, and the flow supplier provides the predetermined volume of fluid to the target via the second fluid channel when the first fluid channel is closed.

[0007] In the fluid delivery device involved in the present disclosure, when the volume of the flow feeder changes, a predetermined volume of fluid can be received from the reservoir through the first fluid channel or a predetermined volume of fluid can be provided to the target through the second fluid channel. In this case, the fluid can be quantified through the flow feeder, thereby completing quantitative administration. In addition, the first valve is controlled by the first control branch to close the first fluid channel when the power circuit outputs a first pulse current, or the second valve is controlled by the second control branch to close the second fluid channel when the power circuit outputs a second pulse current with a polarity opposite to the first pulse current. In this case, the first valve can be started only when the second valve is not enabled or the second valve can be started only when the first valve is not enabled, thereby forming a safety constraint between the first fluid channel and the second fluid channel. In addition, since the first valve and the second valve independently control the closure of the first fluid channel and the second fluid channel, in this case, the interference between multiple fluid channels during the control of the monomer valve can be reduced, thereby improving the accuracy of quantitative administration.

[0008] In addition, in the fluid delivery device involved in the present disclosure, optionally, the first control branch has a first conduction unit that blocks the second pulse current and conducts the first pulse current, and the second control branch has a second conduction unit that blocks the first pulse current and conducts the second pulse current. In this case, the first valve can be controlled by the first conduction unit to be enabled only when the first pulse current is on, or the second valve can be controlled by the second conduction unit to be enabled only when the second pulse current is on. Since the polarities of the first pulse current and the second pulse current are opposite, the control can have safety constraints, and the opening and closing of the first fluid channel and the second fluid channel can be independently controlled, thereby reducing the interference caused by insufficient sealing when the first fluid channel and the second fluid channel are controlled simultaneously using a single valve.

[0009] In addition, in the fluid delivery device involved in the present disclosure, optionally, the first fluid channel includes a first elastic region with elasticity, the second fluid channel includes a second elastic region with elasticity, the first elastic region is configured to be opened or closed under the action of the first valve, and the second elastic region is configured to be opened or closed under the action of the second valve. In this case, the first valve is used to perform, for example, a squeezing action on the first elastic region of the first fluid channel to control the opening and closing of the first fluid channel, or the second valve is used to perform, for example, a squeezing action on the second elastic region of the second fluid channel to control the opening and closing of the second fluid channel, thereby facilitating the control of the opening and closing of the first fluid channel or the second fluid channel, while improving the sealing of the first fluid channel and the second fluid channel, and reducing the interference between the first fluid channel and the second fluid channel due to independent control.

[0010] In addition, in the fluid delivery device involved in the present disclosure, optionally, the first valve includes a first main body portion arranged in the first elastic area, a first push portion arranged in the first main body portion and capable of being close to and squeezing the first elastic area, a first actuator driving the first push portion to move toward or away from the first elastic area, and a first resetter arranged in the first push portion and abutting the first main body portion to restore the first push portion to an initial position. In this case, the first elastic area of ​​the first fluid channel can be repeatedly squeezed by the first valve, thereby controlling the opening and closing of the first fluid channel. In addition, by controlling the opening and closing of the first fluid channel by squeezing, the sealing of the first fluid channel can also be improved, and interference with other channels can be reduced.

[0011] In addition, in the fluid delivery device involved in the present disclosure, optionally, the second valve includes a second main body portion arranged in the second elastic area, a second push portion arranged in the second main body portion and capable of being close to and squeezing the second elastic area, a second actuator driving the second push portion to move toward or away from the second elastic area, and a second resetter arranged in the second push portion and abutting the second elastic area to restore the second push portion to an initial position. In this case, the second elastic area of ​​the second fluid channel can be repeatedly squeezed by the second valve, thereby controlling the opening and closing of the second fluid channel. In addition, by controlling the opening and closing of the second fluid channel by squeezing, the sealing of the second fluid channel can also be improved, and interference with other channels can be reduced.

[0012] In addition, in the fluid delivery device involved in the present disclosure, optionally, the first actuator drives the first push part to approach or move away from the first elastic region when the power circuit outputs the first pulse current, and the second actuator drives the second push part to approach or move away from the second elastic region when the power circuit outputs the second pulse current. In this case, the power circuit controls whether the first actuator is enabled, and thus the first push part can be controlled to approach or move away from the first elastic region to repeatedly squeeze the first elastic region, thereby controlling the opening and closing of the first fluid channel, or the power circuit controls whether the second actuator is enabled, and thus the second push part can be controlled to approach or move away from the second elastic region to repeatedly squeeze the second elastic region, thereby controlling the opening and closing of the second fluid channel. In addition, since the polarities of the first pulse current and the second pulse current are opposite, the first actuator and the second actuator can be independently and oppositely controlled, thereby providing safety constraints.

[0013] In addition, in the fluid delivery device involved in the present disclosure, optionally, the first actuator and the second actuator are actuators driven by memory metal materials. In this case, the easy-to-control property of the memory metal material is used to control the first pusher to approach or move away from the first elastic region, and then the first resetting device can be used to repeatedly squeeze the first elastic region, thereby controlling the opening and closing of the first fluid channel, or the easy-to-control property of the memory metal material is used to control the second pusher to approach or move away from the second elastic region, and then the second resetting device can be used to repeatedly squeeze the second elastic region, thereby controlling the opening and closing of the second fluid channel.

[0014] In addition, in the fluid delivery device involved in the present disclosure, optionally, when the flow feeder maintains a first volume, the predetermined volume of fluid is received via the first fluid channel, and when the flow feeder maintains a second volume, the predetermined volume of fluid is provided via the second fluid channel, the second volume is smaller than the first volume, and the predetermined volume is determined by the volume difference between the first volume and the second volume. In this case, the second volume is smaller than the first volume, and the flow feeder switches from the first volume to the second volume to facilitate the formation of positive pressure to provide fluid to the target via the second fluid channel, and the flow feeder switches from the second volume to the first volume to facilitate the formation of negative pressure to receive fluid from the reservoir via the first fluid channel, and the predetermined volume of the fluid can be determined when receiving or providing the fluid through the volume difference between the first volume and the second volume, thereby completing quantitative fluid delivery, that is, quantitative control of fluid delivery can be performed.

[0015] In addition, in the fluid delivery device involved in the present disclosure, optionally, the flow supplier includes a flow supplier body, a piston and a third actuator, one side of the flow supplier body is open and sealed by the piston, the third actuator drives the piston to switch the volume of the flow supplier between the first volume and the second volume, the other side of the flow supplier body is connected to the second fluid channel, and the flow supplier body and the piston are sealed by an elastic sealing diaphragm. In this case, the flow supplier can change the volume under the action of the third actuator and the piston, thereby receiving a predetermined volume of fluid from the first fluid channel or providing a predetermined volume of fluid from the second fluid channel. In addition, by sealing the flow supplier body and the piston with an elastic sealing diaphragm, it is possible to reduce the entry of air bubbles into the flow supplier body, thereby improving the accuracy and safety of fluid delivery.

[0016] In addition, in the fluid delivery device involved in the present disclosure, optionally, the third actuator is one of a shape memory alloy, a piezoelectric motor or a micro servo motor. In this case, the third actuator is a shape memory alloy, which can facilitate the use of conductive heating shape memory alloy to obtain a reciprocating and accurate and stable power source to improve the convenience of controlling the flow feeder, the third actuator is a piezoelectric motor, which can use the nanometer-level control accuracy of the piezoelectric motor to improve the accuracy of the flow feeder to obtain a predetermined volume of fluid, and the third actuator is a micro servo motor, which can use the stable torque and high-precision performance of the servo motor to improve the stability and accuracy of the flow feeder to obtain a predetermined volume of fluid.

[0017] According to the present disclosure, a fluid delivery device based on pulse control of multiple valves is provided, which can not only realize the safety constraints of single-body valve control, but also reduce the interference between multiple fluid channels during single-body valve control, thereby improving the accuracy of quantitative drug delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present disclosure will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram showing an application scenario of a fluid delivery device based on pulse control of multiple valves involved in the example of the present disclosure.

[0020] Figure 2 is a schematic diagram showing the structure of a fluid delivery device based on pulse control of multiple valves involved in the example of the present disclosure.

[0021] Figure 3 It is a schematic diagram showing the flow direction and control relationship of the fluid in each device in the fluid delivery device involved in the example of the present disclosure.

[0022] Figure 4 It is a schematic diagram showing a flow state of controlling a fluid through a fluid delivery device involved in an example of the present disclosure.

[0023] Figure 5 Schematic diagram showing another flow state of controlling a fluid through a fluid delivery device according to an example of the present disclosure.

[0024] Figure 6 1 is a schematic structural diagram showing a first example of a flow supplier in a fluid delivery device according to an example of the present disclosure.

[0025] Figure 7 1 is a schematic structural diagram showing a second example of a flow supplier in a fluid delivery device according to an example of the present disclosure.

[0026] Figure 8 1 is a schematic structural diagram showing a third example of a flow supplier in a fluid delivery device according to an example of the present disclosure.

[0027] Fig. 9 It is a schematic diagram showing the structure of the first fluid channel or the second fluid channel in the fluid delivery device involved in the example of the present disclosure.

[0028] Fig.10 It is a schematic diagram showing the structure of the first valve in the fluid delivery device involved in the example of the present disclosure and its cooperation with the first fluid channel when the initial position of the first pushing part is close to the extrusion of the first elastic area.

[0029] Fig.11 This is to show the Fig.10A schematic diagram of the structure of the first valve in the fluid delivery device involved in the example and the first pushing portion being away from the first elastic area and the first resetter being energized in a compression manner when the valve cooperates with the first fluid channel.

[0030] Fig.12 It is a schematic diagram showing the structure of the first valve in the fluid delivery device involved in another example of the present disclosure and its cooperation with the first fluid channel when the initial position of the first pushing part is close to the extruded first elastic area.

[0031] Fig.13 This is to show the Fig.12 A schematic diagram of the structure of the first valve in the fluid delivery device involved in the example and the first pushing portion being away from the first elastic area and the first resetter being energized in a stretching manner when the valve cooperates with the first fluid channel.

[0032] Fig.14 It is a schematic diagram showing the structure of the second valve in the fluid delivery device involved in the example of the present disclosure and its cooperation with the second fluid channel when the initial position of the second pushing part is far away from the second elastic area.

[0033] Fig.15 This is to show the Fig.14 A schematic diagram of the structure of the second valve in the fluid delivery device involved in the example and the second pushing portion approaching and squeezing the second elastic area and the second resetter being energized in a compression manner when the second valve cooperates with the second fluid channel.

[0034] Fig.16 It is a schematic diagram showing the structure of the second valve in the fluid delivery device involved in another example of the present disclosure and its cooperation with the second fluid channel when the initial position of the second pushing part is away from the second elastic area.

[0035] Fig.17 This is to show the Fig.16 The structure of the second valve in the fluid delivery device involved in the example and the schematic diagram of the second pushing portion approaching and squeezing the second elastic area and the second restorer being energized in a stretching manner when the second valve cooperates with the second fluid channel.

[0036] Fig.18 Schematic diagram showing the circuit structure of the power supply circuit in the fluid delivery device involved in the example of the present disclosure and its connection relationship with the first valve, the second valve, and the third actuator.

[0037] Fig.19 It is a simplified diagram showing the working principle of the connection between the power supply circuit and the first valve and the second valve in the fluid delivery device involved in the example of the present disclosure.

[0038] Fig. 20It is a schematic diagram showing another application scenario of the fluid delivery device involved in the example of the present disclosure.

[0039] Fig.21 is a schematic diagram showing data transmission in a medical system according to an example of the present disclosure.

[0040] Fig. 22 is a schematic diagram showing another example of data transmission in the medical system involved in the examples of the present disclosure.

[0041] Description of reference numerals:

[0042] 1… fluid delivery device, 10… housing, 11… liquid reservoir, 12… filter, 13… first fluid channel, 14… first valve, 15… flow supplier, 16… second valve, 17… second fluid channel, 18… needle assist device, 19… power supply circuit, 151… flow supplier body, 152… piston, 153… third actuator, 1511… limiting protrusion, 1512… sealing diaphragm, 1513… limiting mechanism, 141… first main body, 142 ...a first push portion, 143 ...a first actuator, 144 ...a first reset device, 161 ...a second main body portion, 162 ...a second push portion, 163 ...a second actuator, 164 ...a second reset device, 131 ...a first elastic region, 171 ...a second elastic region, 191 ...a first control branch, 192 ...a second control branch, 193 ...a third control branch, 194 ...a controller, 195 ...a power supply, 1911 ...a first conduction unit, 1921 ...a second conduction unit,

[0043] 100…medical system, 2…target, 3…external controller, 4…sensor monitor. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments filled in by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] It should be noted that the terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratios of the sizes of the components to each other or the shapes of the components may be different from the actual ones.

[0046] The present disclosure provides a fluid delivery device based on pulse control of multiple valves, which can not only achieve the safety constraints of single-body valve control, but also reduce the interference between multiple fluid channels during single-body valve control, thereby improving the accuracy of quantitative drug delivery. In some examples, the fluid delivery device based on pulse control of multiple valves can also be called "pulse-controlled fluid delivery device", "medical device based on pulse control of multiple valves", "fluid delivery device with independently controlled valves", "medical device with independently controlled valves", etc., and for the sake of convenience of description, it can be referred to as "fluid delivery device" or "medical device" for short.

[0047] Figure 1 Schematic diagram showing an application scenario of a fluid delivery device 1 based on pulse control of multiple valves involved in the example of the present disclosure.

[0048] like Figure 1 As shown, in the present disclosure, the fluid delivery device 1 can be used for fluid delivery, specifically, for delivering fluid into the body of the target 2. Fluid delivery can be understood as the act of infusing a fluid such as a liquid medicine into the target 2, and the target 2 can refer to the infusion object of the fluid delivery device 1 involved in the present disclosure, including but not limited to at least one of subcutaneous animal, animal viscera, plant, or liquid preparation container.

[0049] Furthermore, in the present disclosure, target 2 may specifically refer to a patient who needs fluid delivery to complete disease treatment.

[0050] In addition, in the present disclosure, "fluid delivery", "infusion", "injection fluid" and the like are not limiting and, unless otherwise specified, can be understood to have the same or similar meanings. In some examples, the fluid delivery device 1 can be a patch-type device or an in vitro non-patch-type device. For example, the patch-type device can be Figure 1The insulin pump shown is applied to the surface of the human body, and the insulin pump infuses insulin into the human body through an injection needle. The non-applied device can be a hanging insulin pump, etc. In other examples, the fluid delivery device 1 can be configured as a device that can be implanted subcutaneously or in the body, and the shell can be made into a specific shape using materials with good biocompatibility, such as an implantable analgesic pump, a fully implantable hepatic vascular drug pump, and other devices that adapt to different parts of the human body.

[0051] In addition, in the present disclosure, the fluid is not particularly limited, for example, it can be a liquid medicine infused through the fluid delivery device 1 involved in the present disclosure. In some examples, such liquid medicine can be dopamine, dobutamine, epinephrine, norepinephrine bitartrate, sodium nitroprusside, stamisuride, propofol, insulin, glucagon-like peptide-1, etc. In addition, the fluid delivery device 1 involved in the present disclosure can also be used to regularly, continuously and accurately administer drugs to the target 2 in combination with the actual situation of any disease.

[0052] Figure 2 is a schematic diagram showing the structure of a fluid delivery device 1 based on pulse control of multiple valves involved in the example of the present disclosure.

[0053] like Figure 2 As shown, the fluid delivery device 1 involved in the present disclosure may include a liquid reservoir 11 , a flow supplier 15 , a first fluid channel 13 , a second fluid channel 17 , a first valve 14 , a second valve 16 , and a power circuit 19 . Figure 3 It is a schematic diagram showing the flow direction and control relationship of the fluid in each device in the fluid delivery device 1 involved in the example of the present disclosure.

[0054] In some examples, the reservoir 11 can be used to store fluids. For example, the reservoir 11 can store a large amount of liquid medicine such as insulin, so as to deliver insulin to the diabetic patient in a timely manner when the diabetic patient sends a glucose warning event.

[0055] In some examples, the volume of the reservoir 11 can be designed according to the type of fluid, the amount of fluid delivered at a single time, the duration of fluid delivery, etc. In some examples, the reservoir 11 can also have a supplementary inlet for replenishing the fluid. In this case, the storage capacity of the reservoir 11 can be increased to facilitate the delivery of a large amount of fluid required for the target 2.

[0056] In some examples, the liquid reservoir 11 may have a predetermined pressure, and the method of providing the predetermined pressure may include using an elastic material as the inner cavity of the liquid reservoir 11 or using an actuator to actuate, etc. In this case, the liquid reservoir 11 with a predetermined pressure can better deliver the fluid therein to a container such as the flow supplier 15, and the accuracy of the flow supplier 15 receiving the predetermined volume of fluid will not be affected by the presence of negative pressure or bubbles caused by emptying the fluid.

[0057] In the present disclosure, a large amount of fluid can be stored in the reservoir 11, such as Figure 3 As shown, a predetermined volume of fluid can enter the flow supplier 15 from the liquid reservoir 11 via the first fluid channel 13, and can be guided from the flow supplier 15 into the target 2 via the second fluid channel 17. In this case, the flow supplier 15 receives or provides a predetermined volume of fluid with constraints by controlling the opening and closing of the first fluid channel 13 and the second fluid channel 17, for example, the first fluid channel 13 is controlled by the first valve 14, and the second fluid channel 17 is controlled by the second valve 16, thereby having higher safety than the method of directly using an actuator to drive the fluid in the liquid reservoir 11 to enter the target 2, that is, higher safety constraints.

[0058] Figure 4 It is a schematic diagram showing a flow state of controlling a fluid by a fluid delivery device 1 according to an example of the present disclosure. Figure 5 Schematic diagram showing another flow state of controlling a fluid by a fluid delivery device 1 according to an example of the present disclosure.

[0059] As described above, the fluid delivery device 1 involved in the present disclosure may include a flow supplier 15. In some examples, the flow supplier 15 can receive or provide a predetermined volume of fluid by changing the volume. Among them, "receiving a predetermined volume of fluid" may refer to receiving, accepting, obtaining or acquiring a predetermined volume of fluid, and the method may include but is not limited to flowing in, squeezing in, sucking in or pumping in, etc.; "providing a predetermined volume of fluid" may refer to providing or discharging a predetermined volume of fluid from the flow supplier 15, and the method may include but is not limited to flowing out, squeezing, sucking out or pumping out, etc.

[0060] In some examples, such as Figure 4 As shown, the flow supplier 15 can be connected to the liquid reservoir 11 through the first fluid channel 13 , that is, the first fluid channel 13 can connect the liquid reservoir 11 and the flow supplier 15 .

[0061] In some examples, such as Figure 5As shown, the flow supplier 15 can guide the fluid from the flow supplier 15 into the target 2 through the guidance of the second fluid channel 17 , that is, the second fluid channel 17 can be connected to the flow supplier 15 and guide the fluid from the flow supplier 15 into the target 2 .

[0062] In some examples, when the volume of the flow supplier 15 changes, a predetermined volume of fluid may be received from the reservoir 11 through the first fluid channel 13 or a predetermined volume of fluid may be provided to the target 2 through the second fluid channel 17. Figure 4 and Figure 5 As shown, the flow supplier 15 can maintain a first volume when the second fluid channel 17 is closed and can receive a predetermined volume of fluid from the reservoir 11 via the first fluid channel 13, and the flow supplier 15 can maintain a second volume when the first fluid channel 13 is closed and can provide a predetermined volume of fluid to the target 2 via the second fluid channel 17. In this case, the fluid can be quantitatively measured by the flow supplier 15, thereby achieving quantitative administration.

[0063] In some examples, the predetermined volume of fluid may also be called a unit volume, a basic volume, or a digital volume of fluid. The predetermined volume of fluid may be determined by changing the first volume or the second volume of the flow supplier 15 according to different fluid types and treatment effects. For example, according to the needs of diabetics to obtain a specific treatment effect, the amount of insulin obtained each time may be set to 0.01 mg (or ml), 0.05 mg (or ml), 0.1 mg (or ml), 0.5 mg (or ml), 1 mg (or ml), etc. In some examples, the lower limit of the predetermined volume of fluid may not be limited. For example, in some very precise delivery scenarios, the predetermined volume of fluid is a tiny volume such as 0.5 μL.

[0064] In some examples, the second volume may be smaller than the first volume, and the predetermined volume may be determined by the volume difference between the first volume and the second volume. In this case, the second volume is smaller than the first volume, and the flow supplier 15 switches from the first volume to the second volume to facilitate the formation of positive pressure to provide fluid to the target 2 via the second fluid channel 17, and the flow supplier 15 switches from the second volume to the first volume to facilitate the formation of negative pressure to receive fluid from the reservoir 11 via the first fluid channel 13, and the predetermined volume of the fluid can be determined when receiving or providing the fluid by the volume difference between the first volume and the second volume, thereby completing quantitative fluid delivery, that is, quantitative control of fluid delivery.

[0065] Figure 6 1 is a schematic structural diagram showing a first example of the flow supplier 15 in the fluid delivery device 1 involved in the example of the present disclosure. Figure 71 is a schematic structural diagram showing a second example of the flow supplier 15 in the fluid delivery device 1 involved in the example of the present disclosure. Figure 8 1 is a schematic structural diagram showing a third example of the flow supplier 15 in the fluid delivery device 1 involved in the example of the present disclosure.

[0066] In some examples, such as Figure 6 As shown, the flow supplier 15 may include a flow supplier body 151 , a piston 152 , and an actuator for driving the piston 152 to move. For ease of description and distinction, the actuator for driving the piston 152 to move is referred to as a third actuator 153 .

[0067] In some examples, one side of the flow supplier body 151 may be open and sealed by the piston 152 .

[0068] In some examples, the third actuator 153 can drive the piston 152 to switch the volume of the flow supplier 15 between the first volume and the second volume. In this case, the flow supplier 15 can change the volume under the action of the third actuator 153 and the piston 152, thereby being able to receive a predetermined volume of fluid from the first fluid channel 13.

[0069] In some examples, the other side of the flow supplier body 151 can be in communication with the first fluid channel 13 or the second fluid channel 17. In this case, the flow supplier 15 can receive a predetermined volume of fluid from the first fluid channel 13 or provide the second fluid channel 17. The other side of the flow supplier body 151 can refer to one of the remaining sides of the flow supplier body 151 that is not open and not sealed by the piston 152, such as the opposite side (see Figure 6 or Figure 7 ) or both sides (see Figure 8 ).

[0070] In some examples, such as Figure 6 As shown, the flow feeder body 151 and the piston 152 are sealed by an elastic sealing diaphragm 1512. In this case, the flow feeder body 151 and the piston 152 are sealed by the elastic sealing diaphragm 1512, which can reduce the entry of air bubbles into the flow feeder body 151 and improve the accuracy and safety of fluid delivery.

[0071] In some examples, the third actuator 153 is one of a shape memory alloy, a piezoelectric motor, or a micro servo motor. In this case, the third actuator 153 is a shape memory alloy, which can facilitate the use of conductive heating shape memory alloy to obtain a reciprocating and precise and stable power source to improve the convenience of controlling the flow supplier 15, the third actuator 153 is a piezoelectric motor, which can use the nanometer-level control accuracy of the piezoelectric motor to improve the accuracy of the flow supplier 15 to obtain a predetermined volume of fluid, and the third actuator 153 is a micro servo motor, which can use the stable torque and high-precision performance of the servo motor to improve the stability and accuracy of the flow supplier 15 to obtain a predetermined volume of fluid.

[0072] In some examples, the third actuator 153 can be connected to the power circuit 19. In this case, it can be powered and controlled by the power circuit 19, thereby driving the flow supplier 15 to receive or provide a predetermined volume of fluid.

[0073] In addition, in some examples, such as Figure 6 As shown, in order to ensure the accuracy of the volume change of the flow supplier 15, a plurality of limiting protrusions 1511 can also be provided in the flow supplier body 151. In this case, when the piston 152 reciprocates in the flow supplier 15 to change the volume of the flow supplier 15, the limiting protrusions 1511 can limit the piston 152, thereby improving the accuracy of the volume change of the flow supplier 15. In other examples, the limiting protrusions 1511 may not be provided, that is, the limiting protrusions 1511 are not necessary, and the flow supplier 15 can limit the volume change through the inner wall and the piston 152. For example, the inner wall of the flow supplier body 151 connecting the first channel and the second channel can make the first volume zero by abutting against the piston 152, and then the second volume can be formed by changing the position of the piston 152.

[0074] In other examples, such as Figure 7 As shown, the flow feeder body 151 can also be partially a retractable container formed of elastic material, which can be extended to a predetermined degree and form negative pressure when it is necessary to fill the fluid, and can be retracted to the original state to discharge the fluid when it is necessary to discharge the fluid. In this case, the flow feeder 15 can also change the volume and ensure the sealing performance without setting the piston 152 and the sealing diaphragm 1512.

[0075] In other examples, such as Figure 8As shown, the limiting protrusion 1511 can be provided on the piston 152, and the limiting protrusion 1511 on the piston 152 can cooperate with the limiting mechanism 1513 of the flow supplier 15 to limit the movement of the piston 152. In this case, the inconvenience of providing the limiting protrusion 1511 inside the flow supplier 15 can be reduced, and when the piston 152 reciprocates in the flow supplier 15 to change the volume of the flow supplier 15, the limiting protrusion 1511 can limit the piston 152, thereby improving the accuracy of the volume change of the flow supplier 15.

[0076] In some examples, such as Figure 8 As shown, the piston 152 may not match the inner cavity of the flow supplier body 151, for example, the piston 152 only acts as a pusher to push the elastic material portion of the flow supplier body 151 or the sealing diaphragm 1512 disposed between the piston 152 and the flow supplier 15. In this case, the design of the piston 152 can be simplified, and the fluid can be received or provided by pushing the elastic material or the sealing diaphragm 1512, saving the power required to drive the larger piston 152.

[0077] Fig. 9 Schematic diagram showing the structure of the first fluid channel 13 or the second fluid channel 17 in the fluid delivery device 1 involved in the example of the present disclosure.

[0078] As described above, the fluid delivery device 1 involved in the present disclosure may also include a first valve 14 and a second valve 16. In some examples, the first valve 14 may be disposed in the first fluid channel 13, and the second valve 16 may be disposed in the second fluid channel 17. Specifically, the first valve 14 may be disposed outside the first fluid channel 13, and the second valve 16 may be disposed outside the second fluid channel 17. In this case, the opening and closing of the first fluid channel 13 can be controlled by the first valve, and the opening and closing of the second fluid channel 17 can be controlled by the second valve, thereby facilitating the control of the fluid entering or discharging the flow supplier 15 in a predetermined manner, that is, facilitating the formation of a quantitative fluid delivery process with safety constraints.

[0079] In some examples, the first fluid channel 13 includes a first elastic region 131 having elasticity, and the second fluid channel 17 includes a second elastic region 171 having elasticity.

[0080] In some examples, such as Fig. 9As shown, the first elastic region 131 can be configured to be opened or closed under the action of the first valve 14. In this case, the first valve 14 can perform, for example, a squeezing action on the first elastic region 131 of the first fluid channel 13 to control the opening and closing of the first fluid channel 13, thereby facilitating the control of the opening and closing of the first fluid channel 13, and at the same time, the sealing performance of the first fluid channel 13 can be improved by external squeezing.

[0081] In some examples, such as Fig. 9 As shown, the second elastic region 171 is configured to be opened or closed under the action of the second valve 16. In this case, the second valve 16 can perform, for example, a squeezing action on the second elastic region 171 of the second fluid channel 17 to control the opening and closing of the second fluid channel 17, thereby facilitating the control of the opening and closing of the second fluid channel 17, and at the same time, the sealing performance of the second fluid channel 17 can be improved by external squeezing.

[0082] In the present disclosure, the first fluid channel 13 and the second fluid channel 17 can be independently controlled. In this case, since the first fluid channel 13 and the second fluid channel 17 are independently controlled and both are opened and closed by external squeezing, interference between the first fluid channel 13 and the second fluid channel 17 can be reduced.

[0083] Fig.10 It is a schematic diagram showing the structure of the first valve 14 in the fluid delivery device 1 involved in the example of the present disclosure and its cooperation with the first fluid channel 13 when the initial position of the first pushing portion 142 is close to the first elastic area 131 for squeezing. Fig.11 This is to show the Fig.10 The structure of the first valve 14 in the fluid delivery device 1 of the example and the schematic diagram showing that when the first valve 14 cooperates with the first fluid channel 13 , the first pusher 142 is away from the first elastic region 131 and the first restorer 144 is charged in a compression manner. Fig.12 It is a schematic diagram showing the structure of the first valve 14 in the fluid delivery device 1 involved in another example of the present disclosure and its cooperation with the first fluid channel 13 when the initial position of the first pushing portion 142 is close to the extruded first elastic area 131. Fig.13 This is to show the Fig.12 The structure of the first valve 14 in the fluid delivery device 1 of the example and the schematic diagram showing that when the first pusher 142 is separated from the first elastic region 131 and the first restorer 144 is charged in a stretching manner when the valve 14 is in cooperation with the first fluid channel 13 .

[0084] In some examples, such as Figures 10 to 13As shown, the first valve 14 may include a first main body 141, a first pusher 142, a first actuator 143, and a first resetter 144. In some examples, the first main body 141 may be disposed in the first elastic region 131. In some examples, the first pusher 142 may be disposed in the first main body 141 and may be close to and squeeze the first elastic region 131. In some examples, the first pusher 142 may be disposed independently of the first main body 141, and may be movably connected with the first main body 141 to be close to and squeeze the first elastic region 131.

[0085] In some examples, the first actuator 143 can drive the first pusher 142 to move toward or away from the first elastic region 131. Fig.10 or Fig.12 As shown, the first actuator 143 can drive the first push portion 142 to move in the Z2 direction toward the first elastic region 131, so that the first push portion 142 squeezes the first elastic region 131, thereby closing the first fluid channel 13; Fig.11 or Fig.13 As shown, the first actuator 143 can drive the first push part 142 to move away from the first elastic region 131 in the Z1 direction, so that the first push part 142 will not squeeze the first elastic region 131, thereby enabling the first fluid channel 13 to be opened. In some examples, the first resetter 144 can be provided on the first push part 142 and abut the first main body 141 to restore the first push part 142 to the initial position. In this case, the first elastic region 131 of the first fluid channel 13 can be repeatedly squeezed by the first valve 14, thereby enabling the opening and closing of the first fluid channel 13 to be controlled. In addition, by controlling the opening and closing of the first fluid channel 13 by squeezing, the sealing of the first fluid channel 13 can also be improved, and interference with other channels such as the second fluid channel 17 can be reduced.

[0086] In some examples, restoring the first push portion 142 to the initial position may refer to the position where the first push portion 142 presses the first elastic region 131 to close the first fluid channel 13 (see Fig.10 and Fig.12 ), or may refer to the position where the first push portion 142 is away from the first elastic region 131 so that the first fluid channel 13 is in an open state (since the working principles of the first valve 14 and the second valve 16 are almost the same, the following can be used as a reference Fig.14 and Fig.16 shown).

[0087] In some examples, when the initial position is the position where the first pusher 142 squeezes the first elastic region 131 to make the first fluid channel 13 in a closed state, the first actuator 143 can be used to drive the first pusher 142 away from the first elastic region 131 to make the first fluid channel 13 in an open state, and the first resetter 144 can be charged in a compressed form, and then the charged first resetter 144 can be used to drive the first pusher 142 to return to the state of squeezing the first elastic region 131 to make the first fluid channel 13 closed, thereby controlling the conversion of the first fluid channel 13 from closed to open and then to closed. Figure 10 to Figure 11 Restore Fig.10 The status indicated.

[0088] In some examples, when the initial position is the position where the first pusher 142 squeezes the first elastic region 131 to make the first fluid channel 13 in a closed state, the first actuator 143 can be used to drive the first pusher 142 away from the first elastic region 131 to make the first fluid channel 13 in an open state, and the first resetter 144 can be charged in the form of stretching, and then the charged first resetter 144 can be used to drive the first pusher 142 to return to the state of squeezing the first elastic region 131 to make the first fluid channel 13 closed, thereby controlling the conversion of the first fluid channel 13 from closed to open and then to closed. Figure 12 to Figure 13 Restore Fig.12 The status indicated.

[0089] In some examples, when the initial position is the position where the first push portion 142 is away from the first elastic region 131 so that the first fluid channel 13 is in an open state, the first actuator 143 can be used to drive the first push portion 142 to approach and squeeze the first elastic region 131 so that the first fluid channel 13 is in a closed state, and the first resetter 144 can be charged in the form of compression, and then the charged first resetter 144 can be used to drive the first push portion 142 to return to a state away from the first elastic region 131 so that the first fluid channel 13 is in an open state, thereby controlling the conversion of the first fluid channel 13 from opening to closing and then opening (referring to the second valve 16 below, that is, by Figure 14 to Figure 15 Restore Fig.14 status indicated).

[0090] In some examples, when the initial position is the position where the first push portion 142 is away from the first elastic region 131 so that the first fluid channel 13 is in an open state, the first actuator 143 can be used to drive the first push portion 142 to approach and squeeze the first elastic region 131 so that the first fluid channel 13 is in a closed state, and the first resetter 144 can be charged in the form of stretching, and then the charged first resetter 144 can be used to drive the first push portion 142 to return to a state away from the first elastic region 131 so that the first fluid channel 13 is in an open state, thereby controlling the conversion of the first fluid channel 13 from opening to closing and then opening (referring to the second valve 16 below, that is, by Figure 16 to Figure 17 Restore Fig.16 status indicated).

[0091] Fig.14 It is a schematic diagram showing the structure of the second valve 16 in the fluid delivery device 1 involved in the example of the present disclosure and its cooperation with the second fluid channel 17 when the initial position of the second pushing portion 162 is far away from the second elastic area 171. Fig.15 This is to show the Fig.14 The structure of the second valve 16 in the fluid delivery device 1 of the example and the schematic diagram showing that when the second pusher 162 is close to and squeezes the second elastic region 171 and the second restorer 164 is energized in a compression manner when the second valve 16 cooperates with the second fluid channel 17 . Fig.16 It is a schematic diagram showing the structure of the second valve 16 in the fluid delivery device 1 involved in another example of the present disclosure and its cooperation with the second fluid channel 17 when the initial position of the second pushing portion 162 is away from the second elastic area 171. Fig.17 This is to show the Fig.16 The structure of the second valve 16 in the fluid delivery device 1 of the example and the schematic diagram showing that when the second pusher 162 is close to and squeezes the second elastic region 171 and the second restorer 164 is energized in a stretching manner when the second valve 16 is in cooperation with the second fluid channel 17 .

[0092] In some examples, such as Figures 14 to 17 As shown, the second valve 16 may include a second body 161, a second pusher 162, a second actuator 163, and a second resetter 164. In some examples, the second body 161 may be disposed in the second elastic region 171. In some examples, the second pusher 162 may be disposed in the second body 161 and may be close to and squeeze the second elastic region 171. In some examples, the second pusher 162 may be disposed independently of the second body 161 and may be movably connected with the second body 161 to be close to and squeeze the second elastic region 171.

[0093] In some examples, the second actuator 163 can drive the second pusher 162 to move toward or away from the second elastic region 171. Fig.14 or Fig.16 As shown, the second actuator 163 can drive the second push portion 162 to move away from the second elastic region 171 in the Z1 direction, so that the second push portion 162 does not squeeze the second elastic region 171, thereby enabling the second fluid channel 17 to be opened; Fig.15 or Fig.17 As shown, the second actuator 163 can drive the second push part 162 to move in the Z2 direction toward the second elastic region 171, so that the second push part 162 squeezes the second elastic region 171, thereby closing the second fluid channel 17. In some examples, the second resetter 164 can be provided on the second push part 162 and abuts the second main body 161 to restore the second push part 162 to the initial position. In this case, the second elastic region 171 of the second fluid channel 17 can be repeatedly squeezed by the second valve 16, thereby controlling the opening and closing of the second fluid channel 17. In addition, by controlling the opening and closing of the second fluid channel 17 by squeezing, the sealing of the second fluid channel 17 can be improved, and interference with other channels such as the second fluid channel 17 can be reduced.

[0094] In some examples, restoring the second push portion 162 to the initial position may refer to the position where the second push portion 162 squeezes the second elastic region 171 to close the second fluid channel 17 (since the working principles of the first valve 14 and the second valve 16 are almost the same, the above reference can be used for reference). Fig.10 and Fig.12 ), or may refer to the position where the second pushing portion 162 is away from the second elastic region 171 so that the second fluid channel 17 is in an open state (see Fig.14 and Fig.16 ).

[0095] In some examples, when the initial position is the position where the second push portion 162 squeezes the second elastic region 171 to make the second fluid channel 17 in a closed state, the second push portion 162 can be driven away from the second elastic region 171 by the second actuator 163 to make the second fluid channel 17 in an open state, and the second resetter 164 can be charged in a compressed form, and then the second push portion 162 can be driven by the charged second resetter 164 to restore to the state of squeezing the second elastic region 171 to make the second fluid channel 17 closed, thereby controlling the conversion of the second fluid channel 17 from closed to open and then to closed (referring to the first valve 14 above, that is, by Figure 10 to Figure 11 Restore Fig.10 status indicated).

[0096] In some examples, when the initial position is the position where the second push portion 162 squeezes the second elastic region 171 to make the second fluid channel 17 in a closed state, the second push portion 162 can be driven away from the second elastic region 171 by the second actuator 163 to make the second fluid channel 17 in an open state, and the second resetter 164 can be charged in the form of stretching, and then the second push portion 162 can be driven by the charged second resetter 164 to return to the state of squeezing the second elastic region 171 to make the second fluid channel 17 closed, thereby controlling the conversion of the second fluid channel 17 from closed to open and then to closed (referring to the first valve 14 above, that is, by Figure 12 to Figure 13 Restore Fig.12 status indicated).

[0097] In some examples, when the initial position is the position where the second push portion 162 is away from the second elastic region 171 so that the second fluid channel 17 is in an open state, the second actuator 163 can be used to drive the second push portion 162 to squeeze the second elastic region 171 so that the second fluid channel 17 is in a closed state, and the second resetter 164 can be charged in the form of compression, and then the charged second resetter 164 can be used to drive the second push portion 162 to return to a state away from the second elastic region 171 so that the second fluid channel 17 is in an open state, thereby controlling the conversion of the second fluid channel 17 from open to closed and then to open, that is, by Figure 14 to Figure 15 Restore Fig.14 The status indicated.

[0098] In some examples, when the initial position is the position where the second pusher 162 is away from the second elastic region 171 so that the second fluid channel 17 is in an open state, the second actuator 163 can be used to drive the second pusher 162 to approach and squeeze the second elastic region 171 so that the second fluid channel 17 is in a closed state, and the second resetter 164 can be charged in the form of stretching, and then the charged second resetter 164 can be used to drive the second pusher 162 to return to a state away from the second elastic region 171 so that the second fluid channel 17 is in an open state, thereby controlling the conversion of the second fluid channel 17 from open to closed and then to open, that is, by Figure 16 to Figure 17 Restore Fig.16 The status indicated.

[0099] In some examples, the first actuator 143 can drive the first pusher 142 to approach or move away from the first elastic region 131 when the power circuit 19 outputs the first pulse current, and the second actuator 163 can drive the second pusher 162 to approach or move away from the second elastic region 171 when the power circuit 19 outputs the second pulse current. In this case, the power circuit 19 controls whether the first actuator 143 is enabled, and thus the first pusher 142 can be controlled to approach or move away from the first elastic region 131 to repeatedly squeeze the first elastic region 131, thereby controlling the opening and closing of the first fluid channel 13, or the power circuit 19 controls whether the second actuator 163 is enabled, and thus the second pusher 162 can be controlled to approach or move away from the second elastic region 171 to repeatedly squeeze the second elastic region 171, thereby controlling the opening and closing of the second fluid channel 17. In addition, since the polarities of the first pulse current and the second pulse current are opposite, the first actuator 143 and the second actuator 163 can be independently and oppositely controlled, thereby having safety constraints.

[0100] In some examples, preferably, the first actuator 143 and the second actuator 163 can be actuators driven by memory metal materials. In this case, the easy-to-control property of the memory metal material is used to control the first pusher 142 to approach or move away from the first elastic region 131, and then the first resetting device 144 can be used to repeatedly squeeze the first elastic region 131, thereby controlling the opening and closing of the first fluid channel 13, or the easy-to-control property of the memory metal material is used to control the second pusher 162 to approach or move away from the second elastic region 171, and then the second resetting device 164 can be used to repeatedly squeeze the second elastic region 171, thereby controlling the opening and closing of the second fluid channel 17.

[0101] In some other examples, the first actuator 143 and the second actuator 163 may also be piezoelectric motors or micro servo motors.

[0102] Fig.18 1 is a schematic diagram showing the circuit structure of the power supply circuit 19 in the fluid delivery device 1 according to the example of the present disclosure and its connection relationship with the first valve 14 , the second valve 16 , and the third actuator 153 . Fig.19 It is a simplified diagram showing the principle of connection and operation of the power supply circuit 19 and the first valve 14 and the second valve 16 in the fluid delivery device 1 according to the example of the present disclosure.

[0103] As described above, the fluid delivery device 1 of the present disclosure may further include a power supply circuit 19 for providing a pulse current to the first valve 14 and the second valve 16. Fig.18 As shown, the power supply circuit 19 may include a first control branch 191, a second control branch 192, a controller 194, a power supply 195, and the like.

[0104] In some examples, the power supply 195 can provide corresponding current or voltage to the first control branch 191, the second control branch 192, the controller 194, and the respective actuators. In some examples, the power supply 195 can preferably be a pulse current source. In this case, a pulse current with opposite polarity can be obtained, thereby facilitating the control of the first valve 14 or the second valve 16 through the first control branch 191 or the second control branch 192, and only one of the first valve 14 and the second valve 16 can be started.

[0105] In some examples, the controller 194 can issue a control instruction based on the control signal to control the power supply circuit 19 to output a predetermined pulse current, and input the pulse current to the first valve 14 and the second valve 16 through the first control branch 191 and the second control branch 192. In this case, the first valve 14 and the second valve 16 can be controlled, thereby controlling the opening and closing of the first fluid channel 13 or the second fluid channel 17.

[0106] In some examples, the first control branch 191 can be configured to control the first valve 14 to drive the first fluid channel 13 to close when the power circuit 19 outputs the first pulse current. In some examples, the second control branch 192 can be configured to control the second valve 16 to drive the second fluid channel 17 to close when the power circuit 19 outputs the second pulse current.

[0107] In some examples, the first pulse current may be one of a positive pulse current or a negative pulse current. The second pulse current may be a pulse current of opposite polarity to the first pulse current. For example, when the first pulse current is a positive pulse current, the second pulse current may be a negative pulse current, or when the first pulse current is a negative pulse current, the second pulse current may be a positive pulse current. In this case, the first valve 14 is controlled by the first control branch 191 to close the first fluid channel 13 when the power supply circuit 19 outputs the first pulse current, or the second valve 16 is controlled by the second control branch 192 to close the second fluid channel 17 when the power supply circuit 19 outputs the second pulse current of opposite polarity to the first pulse current, so that the first valve 14 can be started only when the second valve 16 is not enabled or the second valve 16 can be started only when the first valve 14 is not enabled, thereby forming a safety constraint between the first fluid channel 13 and the second fluid channel 17.

[0108] For example, in the case where the fluid delivery device 1 is used as an insulin pump, due to the urgency of insulin in treating diabetic patients, a particularly safe administration time and method, i.e., safety constraints, are required, including rapid response administration and administration according to a predetermined amount. Under the drive of a common modulation signal (without distinguishing polarity, only modulating the pulse period, width or amplitude, etc.), although multiple valves can be independently controlled, it is easy to cause insufficient safety constraints and unexpected events such as medication errors due to delays in signal transmission or modulation results between different signals. Therefore, in the present disclosure, the independent control of multiple valves is achieved by the positive and negative polarities of the AC pulse current, so that the first valve 14 is activated only when the second valve 16 is not activated or the second valve 16 is activated only when the first valve 14 is not activated, which can improve the safety of the fluid delivery device 1.

[0109] In addition, since the first valve 14 and the second valve 16 independently control the closure of the first fluid channel 13 and the second fluid channel 17, in this case, the interference between multiple fluid channels during the control of the single valve can be reduced, thereby improving the accuracy of quantitative drug delivery.

[0110] In some examples, the period or width of the first pulse current and the second pulse current can be set according to the size of the fluid channel. For example, when the first fluid channel 13 and the second fluid channel 17 are the same size, the period and width of the first pulse current and the second pulse current are the same, thereby accurately providing a predetermined volume of fluid from the first fluid channel 13 to the flow supplier 15 or discharging the flow supplier 15 from the second fluid channel 17; for another example, when the first fluid channel 13 and the second fluid channel 17 are different in size, the period and width of the first pulse current can be adjusted according to the difference in size to match the second pulse current so that the predetermined volume of fluid can be accurately provided from the first fluid channel 13 to the flow supplier 15 or discharged from the second fluid channel 17 to the flow supplier 15, thereby accurately completing the fluid delivery.

[0111] In addition, in some examples, such as Fig.19As shown, the first control branch 191 may have a first conduction unit 1911 that blocks the second pulse current and conducts the first pulse current. In some examples, the second control branch 192 may have a second conduction unit 1921 that blocks the first pulse current and conducts the second pulse current. In this case, the first valve 14 is controlled to be enabled only when the first pulse current is applied, or the second valve 16 is controlled to be enabled only when the second pulse current is applied, by the first conduction unit 1911. Since the polarities of the first pulse current and the second pulse current are opposite, the control can have safety constraints, and the opening and closing of the first fluid channel 13 and the second fluid channel 17 can be independently controlled, thereby reducing the interference caused by insufficient sealing when the first fluid channel 13 and the second fluid channel 17 are controlled simultaneously using a single valve.

[0112] In some examples, the first conduction unit 1911 may include at least one unidirectional electronic component such as a diode or a triode. In some examples, the second conduction unit 1921 may also include at least one unidirectional electronic component such as a diode or a triode. In some examples, the first conduction unit 1911 may be set to have a conduction direction opposite to that of the second conduction unit 1921. In this case, the second pulse current can be blocked by the first conduction unit 1911 and the first pulse current can be conducted, and the first pulse current can be blocked by the second conduction unit 1921 and the second pulse current can be conducted, thereby enabling the first valve 14 to be enabled only when the first pulse current is on, or enabling the second valve 16 to be enabled only when the second pulse current is on, by controlling the second conduction unit 1921, to form a safety constraint to reduce interference.

[0113] In some examples, the power supply circuit 19 may further include a third control branch 193. In some examples, the third control branch 193 may be connected to the third actuator 153 circuit and control the third actuator 153 to actuate the piston 152. In this case, the flow supplier 15 may be driven to switch between the first volume and the second volume so as to change the volume to receive or provide the fluid.

[0114] In other examples, the power supply circuit 19 may also include more control branches. For example, when the liquid reservoir 11 requires a certain pressure in order to ensure that it can provide a stable predetermined volume of fluid to the flow supplier 15, a fourth actuator may be set in the liquid reservoir 11 to control its pressure, and the fourth actuator may be driven by the fourth control branch of the power supply circuit 19.

[0115] Fig. 20 It is a schematic diagram showing another application scenario of the fluid delivery device 1 involved in the example of the present disclosure. Fig.21is a schematic diagram showing data transmission of the medical system 100 involved in the example of the present disclosure. Fig. 22 is a schematic diagram showing another example of data transmission of the medical system 100 involved in the example of the present disclosure.

[0116] Also, see Figure 2 As shown, the fluid delivery device 1 of the present disclosure may further include a housing 10, a needle aid 18 and a filter. In some examples, the housing 10 may contain internal components such as a reservoir 11, a flow supplier 15, a first valve 14, and a second valve 16 and protect these internal components.

[0117] In some examples, the needle assisting device 18 can be used to insert the second fluid channel 17 into the subcutaneous part of the target 2 so as to facilitate the injection of fluid into the target 2 through the second fluid channel 17. In some examples, the second fluid channel 17 can be inserted into the subcutaneous part with the help of the needle assisting device 18. In this case, the fluid delivery device 1 can inject fluid into the body through the second fluid channel 17. In some examples, the subcutaneous part of the needle assisting device 18 can be a needle or a trocar, and the needle assisting device 18 can deliver the second fluid channel 17 into the subcutaneous part once and pull out the needle or trocar so that the second fluid channel 17 remains partially under the skin. In this case, the fluid delivery device 1 can inject fluid into the body through the second fluid channel 17 and can reduce the pain of multiple needle sticks for patients.

[0118] In some examples, the filter 12 may be disposed between the reservoir 11 and the first fluid channel 13 to filter the fluid to reduce the possibility of blockage caused by crystallization of the fluid (e.g., drugs such as insulin), thereby enabling the fluid to flow smoothly into the flow supplier 15, thereby improving the accuracy of the fluid being infused into the target 2 through the flow supplier 15. In other examples, the fluid delivery device 1 may not be provided with the filter 12, for example, when the fluid is a drug solution that is not easy to crystallize, the filter 12 may not be provided.

[0119] In addition, if Fig. 20 As shown, the fluid delivery device 1 involved in the present disclosure can also be combined with an external controller 3, a sensor monitor 4, etc. to form an automatic drug delivery medical system 100. The automatic drug delivery medical system 100 can be used to automatically infuse fluid into the target 2 based on preset instructions or infusion requirements.

[0120] In some examples, the external controller 3 can be a dedicated controller, a mobile phone, a personal computer, or other terminal device. In some examples, the external controller 3 can also be a cloud device or an Internet device, such as a server or a control terminal of an Internet hospital.

[0121] In some examples, the sensor monitor 4 can be a device for monitoring physiological parameters of the target 2, such as blood oxygen saturation, pulse rate, body temperature, height / weight, body composition, blood lipids, blood sugar, blood pressure, etc., and there is no limitation here.

[0122] In some examples, the sensor monitor 4 can be connected to the external controller 3 by wireless communication. In some examples, the wireless communication method can include but is not limited to at least one of Bluetooth, Wifi, 3G / 4G / 5G, NFC, UWB and Zig-Bee.

[0123] In some examples, the external controller 3 can be wirelessly connected to the fluid delivery device 1. In some examples, the wireless communication method can include but is not limited to at least one of Bluetooth, Wifi, 3G / 4G / 5G, NFC, UWB, and Zig-Bee.

[0124] In some examples, such as Fig.21 As shown, the sensor monitor 4 can obtain data of the physiological parameters of the target 2 and send the data to the external controller 3, and the external controller 3 can control the fluid delivery device 1 to deliver the fluid based on the data of the physiological parameters of the target 2. In other examples, such as Fig. 22 As shown, the external controller 3 may not be provided, and the fluid delivery device 1 may be linked with the sensor monitor 4 through the internal controller 194 to automatically administer the drug, and the controller 194 may be in communication connection with the sensor monitor 4. In this case, the fluid delivery device 1 can directly respond to the monitoring data of the sensor monitor 4 and automatically provide infusion therapy to the target 2 in a timely manner, thereby improving the convenience and rapidity of delivering the fluid.

[0125] In some examples, if the treatment of diabetes is taken as an example, the sensor monitor 4 may be a blood glucose monitor. The data of the physiological parameter of the target 2 may be blood glucose data. The workflow of the fluid delivery device 1 may include: obtaining real-time blood glucose data from the blood glucose monitor of the target 2 (i.e., the aforementioned sensor monitor 4) and sending it to the external controller 3; the external controller 3 sends a control signal to the fluid delivery device 1 based on the blood glucose data; the fluid delivery device 1 may infuse the fluid into the target 2 based on the control signal.

[0126] In summary, according to the present disclosure, a fluid delivery device 1 based on pulse control of multiple valves can be provided, which can not only achieve the safety constraints of single-body valve control, but also reduce the interference between multiple fluid channels during single-body valve control, thereby improving the accuracy of quantitative drug delivery.

[0127] Although the present disclosure is specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the present disclosure in any form. Those skilled in the art may modify and change the present disclosure as needed without departing from the essential spirit and scope of the present disclosure, and these modifications and changes all fall within the scope of the present disclosure.

Claims

1. A fluid delivery device based on pulse control of multiple valves, characterized in that: The invention comprises a fluid reservoir for storing fluid, a flow supplier for receiving or providing a predetermined volume of fluid by changing its volume, a first fluid channel connecting the fluid reservoir and the flow supplier, a second fluid channel connecting the flow supplier and guiding the fluid from the flow supplier to a target, a first valve disposed on the first fluid channel, a second valve disposed on the second fluid channel, and a power supply circuit for providing a pulse current to the first valve and the second valve. The power circuit includes a first control branch configured to control the first valve to drive the first fluid channel to close when the power circuit outputs a first pulse current, and a second control branch configured to control the second valve to drive the second fluid channel to close when the power circuit outputs a second pulse current having a polarity opposite to that of the first pulse current. The flow supplier receives the predetermined volume of fluid from the reservoir via the first fluid channel when the second fluid channel is closed, and the flow supplier provides the predetermined volume of fluid to a target via the second fluid channel when the first fluid channel is closed.

2. The fluid delivery device according to claim 1, characterized in that: The first control branch comprises a first conduction unit for blocking the second pulse current and conducting the first pulse current, and the second control branch comprises a second conduction unit for blocking the first pulse current and conducting the second pulse current.

3. The fluid delivery device according to claim 1, characterized in that: The first fluid channel includes a first elastic region with elasticity, and the second fluid channel includes a second elastic region with elasticity. The first elastic region is configured to be opened or closed under the action of the first valve, and the second elastic region is configured to be opened or closed under the action of the second valve.

4. The fluid delivery device according to claim 3, characterized in that: The first valve includes a first main body portion arranged in the first elastic area, a first pushing portion arranged in the first main body portion and capable of pressing the first elastic area, a first actuator driving the first pushing portion to move toward or away from the first elastic area, and a first restorer arranged in the first pushing portion and abutting against the first main body portion to restore the first pushing portion to an initial position.

5. The fluid delivery device according to claim 4, characterized in that: The second valve includes a second main body portion arranged in the second elastic area, a second pushing portion arranged in the second main body portion and capable of approaching and squeezing the second elastic area, a second actuator driving the second pushing portion to move toward or away from the second elastic area, and a second restorer arranged in the second pushing portion and abutting the second elastic area to restore the second pushing portion to an initial position.

6. The fluid delivery device according to claim 5, characterized in that: The first actuator drives the first pushing portion to move closer to or farther from the first elastic region when the power circuit outputs the first pulse current, and the second actuator drives the second pushing portion to move closer to or farther from the second elastic region when the power circuit outputs the second pulse current.

7. The fluid delivery device according to claim 5, characterized in that: The first actuator and the second actuator are actuators driven by memory metal materials.

8. The fluid delivery device according to claim 1, characterized in that: The flow supplier receives the predetermined volume of fluid via the first fluid channel when maintaining a first volume, and provides the predetermined volume of fluid via the second fluid channel when maintaining a second volume, wherein the second volume is smaller than the first volume, and the predetermined volume is determined by the volume difference between the first volume and the second volume.

9. The fluid delivery device according to claim 8, characterized in that: The flow supplier includes a flow supplier body, a piston and a third actuator. One side of the flow supplier body is open and sealed by the piston. The third actuator drives the piston to switch the volume of the flow supplier between the first volume and the second volume. The other side of the flow supplier body is connected to the second fluid channel. The flow supplier body and the piston are sealed by an elastic sealing diaphragm.

10. The fluid delivery device according to claim 8, characterized in that: The third actuator is one of a shape memory alloy, a piezoelectric motor or a servo motor.

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