Flow-constant conveying device, control method and server

Abstract

The invention provides a constant-flow conveying device, a control method and a server, and relates to the technical field of medical instruments.The constant-flow conveying device comprises a first flow channel, a second flow channel, a constant-flow conveying module and a control module, the control module is connected with the constant-flow conveying module and a user side, and the constant-flow conveying module is connected with the first flow channel and the second flow channel; the constant-current conveying module comprises at least one constant-current conveying unit; wherein the control module is used for starting a target constant-current conveying unit in the constant-current conveying module according to user demand information when the user demand information of a user side is received; wherein the user demand information is used for reflecting the target fluid flow; the constant flow conveying unit is used for inputting fluid through the first flow channel at a constant flow rate or outputting fluid through the second flow channel at a constant flow rate. The corresponding constant-current conveying unit can be selected according to user requirements, and the stability of constant-current conveying is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a flow-constant delivery device, a control method and a server. Background Art

[0002] When performing ophthalmic or cardiovascular surgery, a stable suction or infusion flow rate is required to keep the patient's characteristic parameters stable during the operation. At present, relevant technologies have proposed that the input or output of the flow rate can be controlled by a peristaltic pump, a Venturi pump or a diaphragm pump, but the peristaltic pump will have flow pulsation during the suction process, the Venturi pump cannot achieve precise flow regulation, and the diaphragm pump cannot achieve flow changes. Therefore, the above solutions cannot provide stable constant flow delivery and flow control. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a constant flow delivery device, a control method and a server, which can select a corresponding constant flow delivery unit according to user needs and improve the stability of constant flow delivery.

[0004] In the first aspect, an embodiment of the present invention provides a constant flow delivery device, comprising: a first flow channel, a second flow channel, a constant flow delivery module and a control module, the control module is respectively connected to the constant flow delivery module and the user end, the constant flow delivery module is respectively connected to the first flow channel and the second flow channel, and the constant flow delivery module includes at least one constant flow delivery unit; wherein the control module is used to open the target constant flow delivery unit in the constant flow delivery module according to the user demand information when receiving the user demand information from the user end; wherein the user demand information is used to reflect the target fluid flow; the constant flow delivery unit is used to input the fluid through the first flow channel at a constant flow rate, or to output the fluid through the second flow channel at a constant flow rate.

[0005] In one embodiment, the constant current delivery unit includes: a parallel constant current delivery unit, the parallel constant current delivery unit includes: a first cavity and a second cavity, the first cavity includes: a first switch valve, a third switch valve and a first piston pump, the second cavity includes: a second switch valve, a fourth switch valve and a second piston pump; wherein the first piston pump is connected to the first switch valve and the third switch valve respectively, the first switch valve is connected to the first flow channel, the third switch valve is connected to the second flow channel, the first piston pump includes a first piston, which is used to fill the fluid through the first flow channel when the first piston moves downward and the first switch valve is opened, and to output the fluid through the second flow channel when the first piston moves upward and the third switch valve is opened; the second piston pump is connected to the second switch valve and the fourth switch valve respectively, the second switch valve is connected to the first flow channel, the fourth switch valve is connected to the second flow channel, the second piston pump includes a second piston, which is used to fill the fluid through the first flow channel when the second piston moves downward and the second switch valve is opened, and to output the fluid through the second flow channel when the second piston moves upward and the fourth switch valve is opened.

[0006] In one embodiment, the constant current delivery unit also includes: a series constant current output unit, the series constant current output unit includes: a third cavity and a fourth cavity, the third cavity includes: a fifth switch valve and a third piston pump, the fourth cavity includes: a sixth switch valve and a fourth piston pump; wherein the fifth switch valve is connected to the third piston pump and the first flow channel respectively, the third piston pump includes a third piston, the third piston pump is used to fill the fluid through the first flow channel when the third piston moves downward and the fifth switch valve is opened, and when the third piston moves upward, the fluid is output to the fourth cavity and, or the fluid is output through the second flow channel; the sixth switch valve is connected to the third piston pump and the fourth piston pump respectively, the fourth piston pump is connected to the second flow channel, the fourth piston pump includes a fourth piston, the fourth piston pump is used to fill the fluid through the first flow channel when the fourth piston moves downward and the sixth switch valve is opened, or the fluid is filled through the third cavity, and when the fourth piston moves upward, the fluid is output through the second flow channel.

[0007] In one embodiment, the constant current delivery unit also includes: a series constant current input unit, the series constant current input unit includes: a fifth cavity and a sixth cavity, the fifth cavity includes: a seventh switch valve and a fifth piston pump, the sixth cavity includes: an eighth switch valve and a sixth piston pump; wherein the fifth piston pump is respectively connected to the first flow channel and the seventh switch valve, the fifth piston pump includes a fifth piston, the fifth piston pump is used to fill the fluid through the first flow channel when the fifth piston moves downward, and when the fifth piston moves upward and the seventh switch valve is opened, the fluid is output to the sixth cavity, or the fluid is output through the second flow channel; the sixth piston pump is respectively connected to the seventh switch valve and the eighth switch valve, the eighth switch valve is connected to the second flow channel, the sixth piston pump includes a sixth piston, the sixth piston pump is used to fill the fluid through the first flow channel when the sixth piston moves downward, or the fluid is filled through the fifth cavity, and when the sixth piston moves upward and the eighth switch valve is opened, the fluid is output through the second flow channel.

[0008] In one embodiment, when the parallel constant current delivery unit enters a constant current output state, the sum of the fluid output by the first piston pump through the second channel and the fluid output by the second piston pump through the second channel is a constant value; when the parallel constant current delivery unit enters a constant current input state, the sum of the fluid input by the first piston pump through the first channel and the fluid input by the second piston pump through the first channel is a constant value; the sum of the fluid output by the third piston pump through the second channel of the series constant current output unit and the fluid output by the fourth piston pump through the second channel is a constant value; the sum of the fluid input by the fifth piston pump through the first channel of the series constant current input unit and the fluid input by the sixth piston pump through the first channel is a constant value.

[0009] In one embodiment, each switch valve in the constant flow delivery unit includes: a stop valve and / or a rotary cut valve; wherein the stop valve and / or the rotary cut valve are used to perform opening and / or closing operations without changing the flow in each flow channel.

[0010] In a second aspect, an embodiment of the present invention further provides a control method for a constant flow delivery device, the method being applied to a control module of any one of the constant flow delivery devices provided in the first aspect, the method comprising: obtaining user demand information from a user end, wherein the demand information comprises device demand information; determining a target constant flow delivery unit according to the device demand information; obtaining a cycle control instruction, wherein the cycle control instruction comprises a piston pump working instruction and a switch valve working instruction at each time point during the cycle control process, the switch valve working instruction comprises an opening instruction and a closing instruction, and the piston pump working instruction comprises an acceleration motion instruction, a deceleration motion instruction, a uniform speed motion instruction, a forward motion instruction and a reverse motion instruction; sending the power-on instruction and the cycle control instruction to the target constant flow delivery unit, so that the target constant flow delivery unit constantly outputs or inputs the target flow value determined in the flow demand information.

[0011] In one embodiment, the demand information further includes: flow demand information, and the step of obtaining the cycle control instruction includes: determining the cycle control instruction based on the flow demand information and the target constant current delivery unit through a preset instruction generation module.

[0012] In a third aspect, an embodiment of the present invention further provides a server, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the methods provided in the second aspect.

[0013] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement any one of the methods provided in the second aspect.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] A constant flow delivery device, control method and server provided by an embodiment of the present invention include: a first flow channel, a second flow channel, a constant flow delivery module and a control module, wherein the control module is connected to the constant flow delivery module and the user end respectively, the constant flow delivery module is connected to the first flow channel and the second flow channel respectively, and the constant flow delivery module includes at least one constant flow delivery unit; wherein the control module is used to open the target constant flow delivery unit in the constant flow delivery module according to the user demand information when receiving the user demand information of the user end; wherein the user demand information is used to reflect the target fluid flow; the constant flow delivery unit is used to input the fluid through the first flow channel at a constant flow rate, or output the fluid through the second flow channel at a constant flow rate. The embodiment of the present invention can select the corresponding constant flow delivery unit according to the user demand, so as to improve the stability of the constant flow delivery.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a parallel constant current transmission unit provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a series constant current output unit provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of a series constant current input unit provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of a stop valve provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of a rotary cutting valve provided in an embodiment of the present invention;

[0024] Figure 6 A schematic flow chart of a control method for a constant flow conveying device provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of logic control of constant current output of a parallel constant current transmission unit provided in an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of logic control of constant current input of a parallel constant current transmission unit provided in an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of logic control of constant current output of a series constant current output unit provided by an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of logic control of a constant current input of a series constant current input unit provided by an embodiment of the present invention;

[0029] Fig.11 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0030] Icon: 11-first switch valve; 12-first piston pump; 13-third switch valve; 14-second switch valve; 15-second piston pump; 16-fourth switch valve; 21-fifth switch valve; 22-third piston pump; 23-sixth switch valve; 24-fourth piston pump; 31-fifth piston pump; 32-seventh switch valve; 33-sixth piston pump; 34-eighth switch valve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] At present, in many ophthalmic or cardiovascular and cerebrovascular surgeries, there are scenarios where it is necessary to maintain a stable suction or infusion flow rate during the operation to maintain the stability of a certain characteristic parameter of the patient during the operation. Relevant technologies propose that the input or output of the flow rate can be controlled by a peristaltic pump, a Venturi pump or a diaphragm pump, but these three control methods have their own shortcomings: the peristaltic pump will have flow pulsation during the suction process, the Venturi pump cannot achieve precise flow regulation, and the diaphragm pump cannot achieve flow change. Based on this, the constant flow delivery device, control method and server provided by the present invention can select the corresponding constant flow delivery unit according to user needs. The constant flow delivery unit adopts a combination of multiple piston pumps and multiple valves. The piston pump and the valve work together to achieve continuous and stable input or output of the flow, eliminate the flow fluctuation generated when the pump switches between different operating states, and improve the stability of constant flow delivery.

[0033] To facilitate understanding of this embodiment, a flow constant delivery device disclosed in an embodiment of the present invention is first introduced in detail. The device includes: a first flow channel, a second flow channel, a constant flow delivery module and a control module. The control module is connected to the constant flow delivery module and the user end respectively. The constant flow delivery module is connected to the first flow channel and the second flow channel respectively. The constant flow delivery module includes at least one constant flow delivery unit. In one embodiment, the control module is used to open the target constant flow delivery unit in the constant flow delivery module according to the user demand information when receiving the user demand information of the user end, wherein the user demand information is used to reflect the target fluid flow rate. In practical applications, the control module may also include a sensor array for monitoring the fluid flow rate of the first flow channel and the second flow channel, and timely adjusting when the fluid flow rate deviates from the preset value. In one embodiment, the constant flow delivery unit is used to input the fluid through the first flow channel at a constant flow rate, or output the fluid through the second flow channel at a constant flow rate. When there are multiple piston pumps in the constant flow delivery unit, the input fluid and the output fluid are calculated by the sum of the fluid input by each piston pump in the first flow channel and the sum of the fluid output by the second flow channel.

[0034] In order to facilitate the understanding of the constant current transmission unit, an embodiment of the present invention provides a structural schematic diagram of the constant current transmission unit, and specifically refers to the following (A) to (C):

[0035] (A) The constant current delivery unit includes: a parallel constant current delivery unit, the parallel constant current delivery unit includes: a first cavity and a second cavity, the first cavity includes: a first switch valve, a third switch valve and a first piston pump, the second cavity includes: a second switch valve, a fourth switch valve and a second piston pump, see Figure 1 A structural schematic diagram of a parallel constant flow delivery unit is shown, wherein the first piston pump is respectively connected to the first switch valve and the third switch valve, the first switch valve is connected to the first flow channel, the third switch valve is connected to the second flow channel, the first piston pump includes a first piston, which is used to fill the fluid through the first flow channel when the first piston moves downward and the first switch valve is opened, and to output the fluid through the second flow channel when the first piston moves upward and the third switch valve is opened; the second piston pump is respectively connected to the second switch valve and the fourth switch valve, the second switch valve is connected to the first flow channel, the fourth switch valve is connected to the second flow channel, the second piston pump includes a second piston, which is used to fill the fluid through the first flow channel when the second piston moves downward and the second switch valve is opened, and to output the fluid through the second flow channel when the second piston moves upward and the fourth switch valve is opened. In one embodiment, when the parallel constant current delivery unit enters a constant current output state, the sum of the fluid output by the first piston pump through the second flow channel and the fluid output by the second piston pump through the second flow channel is a constant value; when the parallel constant current delivery unit enters a constant current input state, the sum of the fluid input by the first piston pump through the first flow channel and the fluid input by the second piston pump through the first flow channel is a constant value.

[0036] (B) The constant current delivery unit further includes: a series constant current output unit, the series constant current output unit includes: a third cavity and a fourth cavity, the third cavity includes: a fifth switch valve and a third piston pump, the fourth cavity includes: a sixth switch valve and a fourth piston pump, see Figure 2 A structural schematic diagram of a series constant current output unit is shown, the fifth switch valve is respectively connected to the third piston pump and the first flow channel, the third piston pump includes a third piston, the third piston pump is used to fill the fluid through the first flow channel when the third piston moves downward and the fifth switch valve is opened, and when the third piston moves upward, the fluid is output to the fourth cavity and, or the fluid is output through the second flow channel; the sixth switch valve is respectively connected to the third piston pump and the fourth piston pump, the fourth piston pump is connected to the second flow channel, the fourth piston pump includes a fourth piston, the fourth piston pump is used to fill the fluid through the first flow channel when the fourth piston moves downward and the sixth switch valve is opened, or the fluid is filled through the third cavity and, when the fourth piston moves upward, the fluid is output through the second flow channel. In one embodiment, the sum of the fluid output by the third piston pump of the series constant current output unit through the second flow channel and the fluid output by the fourth piston pump through the second flow channel is a constant value.

[0037] (C) The flow rate constant delivery device according to claim 1 is characterized in that the constant flow delivery unit further comprises: a series constant flow input unit, the series constant flow input unit comprises: a fifth cavity and a sixth cavity, the fifth cavity comprises: a seventh switch valve and a fifth piston pump, the sixth cavity comprises: an eighth switch valve and a sixth piston pump, see Figure 3 The structural schematic diagram of a series constant current input unit shown in the figure, the fifth piston pump is respectively connected to the first flow channel and the seventh switch valve, the fifth piston pump includes a fifth piston, the fifth piston pump is used to fill the fluid through the first flow channel when the fifth piston moves downward, and when the fifth piston moves upward and the seventh switch valve is opened, the fluid is output to the sixth cavity, or the fluid is output through the second flow channel; the sixth piston pump is respectively connected to the seventh switch valve and the eighth switch valve, the eighth switch valve is connected to the second flow channel, the sixth piston pump includes a sixth piston, the sixth piston pump is used to fill the fluid through the first flow channel when the sixth piston moves downward, or fill the fluid through the fifth cavity, and when the sixth piston moves upward and the eighth switch valve is opened, the fluid is output through the second flow channel. In one embodiment, the sum of the fluid input through the first flow channel of the fifth piston pump of the series constant current input unit and the fluid input through the first flow channel of the sixth piston pump is a constant value.

[0038] In addition, the present invention adopts a valve volume zero switching structure to eliminate the influence of the valve on the system flow when opening and closing. Figure 4 A schematic diagram of the structure of a stop valve shown in FIG. Figure 5The schematic diagram of the structure of a rotary cutting valve is shown, and each switch valve in the constant flow delivery unit includes: a stop valve and, or a rotary cutting valve, wherein the stop valve and, or a rotary cutting valve are used to perform opening and, or closing operations without changing the flow in each flow channel: the stop valve determines the on-off of the flow path through the movement of the stop plate above; the rotary valve realizes the on-off of the flow channel through the rotating core in the middle, and both switch valve structures can achieve no fluctuation in the flow flow when the flow path is on and off. In one embodiment, each piston pump in the constant flow delivery unit can adopt a volumetric metering pump, so that a specified flow of fluid can be accurately input or output when executing a cycle control instruction.

[0039] To facilitate understanding of the control module of the constant flow delivery device provided in the above embodiment, an embodiment of the present invention provides an application example of a control method of a constant flow delivery device, see Figure 6 The flowchart of a control method of a constant flow conveying device shown in FIG. 1 mainly includes the following steps S602 to S608:

[0040] Step S602, obtaining user demand information from the user end, wherein the demand information includes device demand information and flow demand information; in one embodiment, the device demand information may include the number and model of switch valves and piston pumps, and the flow demand information includes the fluid flow size and constant flow delivery direction (constant current input or constant current output).

[0041] Step S604, determining the target constant current transmission unit according to the device requirement information. In one embodiment, the target constant current transmission unit can be determined as a parallel constant current transmission unit, a series constant current output unit or a series constant current input unit according to the device requirement information. When the target constant current transmission unit is determined to be a parallel constant current transmission unit, the working state of the parallel constant current transmission unit can be further determined to be a constant current output state or a constant current input state.

[0042] Step S606, obtaining a cycle control instruction, wherein the cycle control instruction includes the piston pump working instruction and the switch valve working instruction at each time point in the cycle control process, the switch valve working instruction includes: an opening instruction and a closing instruction, and the piston pump working instruction includes: an acceleration movement instruction, a deceleration movement instruction, a uniform speed movement instruction, a forward movement instruction, and a reverse movement instruction. In one embodiment, different target constant current delivery units correspond to different cycle control instructions. If the target constant current delivery units are the same but the fluid flow rates required by the users are different, it is necessary to adjust the movement speed of the piston pump in the cycle control instruction, and adjust the time nodes of the opening instruction, the closing instruction of the switch valve, and the forward movement instruction and the reverse movement instruction of the piston pump as a whole (that is, the corresponding logical relationship between the cycle control instructions of the switch valve and the piston pump does not change, Figure 7-10In the process, the movements performed in each stage do not change, only the time nodes are stretched or compressed).

[0043] Step S608, sending the power-on instruction and the cycle control instruction to the target constant current transmission unit, so that the target constant current transmission unit constantly outputs or inputs the target flow value determined in the flow demand information.

[0044] In practical applications, when executing the above step S606, the embodiment of the present invention can determine the loop control instruction based on the flow demand information and the target constant current transmission unit through the preset instruction generation module, wherein the control logic of the loop control instruction is different for different constant current transmission units and different constant current input and output requirements. The control logic of the loop control instruction is specifically shown as follows (1) to (4):

[0045] (1) See Figure 7 The logic control schematic diagram of a constant current output of a parallel constant current delivery unit is shown, the first switch valve 11 and the fourth switch valve 16 are in the cut-off state, the third switch valve 13 and the second switch valve 14 are in the flow state, the first piston pump 12 moves upward at a uniform speed, and the flow rate flows out stably, and the second piston pump 15 starts to move downward and starts to fill the fluid, as shown in stage 1. The first piston pump 12 continues to move upward at a uniform speed, and the second piston pump 15 is filled with liquid, as shown in stage 2. The second switch valve 14 is closed, the fourth switch valve 16 is opened, the first piston pump 12 starts to decelerate, and the second piston pump 15 starts to accelerate. Both of them infuse liquid outward at the same time to ensure that the total output fluid flow rate remains unchanged, as shown in stage 3. The first piston pump 12 decelerates to 0, the liquid is emptied, the second piston pump 15 accelerates to the set speed, the first switch valve 11 is opened, and the third switch valve 13 is closed, as shown in stage 4. The first piston pump 12 moves in the opposite direction to fill the fluid, the first switch valve 11 is closed, and the second piston pump 15 continues to move at a uniform speed, as shown in stage 5. The third switch valve 13 is opened, the first piston pump 12 begins to accelerate upward, and the second piston pump 15 begins to decelerate. Both pump fluid outward at the same time to ensure that the total output fluid flow remains unchanged, as shown in stage 6. The second piston pump 15 decelerates to stop, and the first piston pump 12 accelerates to the set speed and begins to move at a uniform speed, as shown in stage 7. Close the fourth switch valve 16, open the second switch valve 14, return to stage 1, and a single cycle ends. In one embodiment, since the speed at which the piston pump refills the liquid is much faster than the output speed, in order to ensure that one piston pump can be filled before the flow output of the other piston pump ends, the two piston pumps always ensure that the flow at the output end remains constant. During the switching process of the two piston pumps, the two piston pumps ensure that the output flow complements each other through the coordination of acceleration and deceleration, thereby realizing the switching of the two piston pumps, and at the same time achieving one acceleration to the set speed and the other deceleration to 0.

[0046] (2) See Figure 8The logic control schematic diagram of a constant current input of a parallel constant current delivery unit is shown, the first switch valve 11 and the fourth switch valve 16 are in the cut-off state, the third switch valve 13 and the second switch valve 14 are in the flow state, the second piston pump 15 moves downward at a uniform speed, the flow is stably sucked, and the first piston pump 12 moves upward to discharge the fluid, as shown in stage 1. The second piston pump 15 continues to move downward at a uniform speed, and the first piston pump 12 has finished emptying the liquid, as shown in stage 2. The first switch valve 11 is opened, the third switch valve 13 is closed, the first piston pump 12 starts to accelerate downward, and the second piston pump 15 starts to decelerate downward. Both of them suck liquid at the same time to ensure that the total input flow remains unchanged, as shown in stage 3. The second piston pump 15 decelerates to stop, and the first piston pump 12 accelerates to the set flow speed. After that, the second switch valve 14 is closed, and the fourth switch valve 16 is opened. As shown in stage 4. The first piston pump 12 continues to move downward at a uniform speed, and the second piston pump 15 moves upward to empty the fluid. As shown in stage 5. The second switch valve 14 is opened, the fourth switch valve 16 is closed, the first piston pump 12 starts to decelerate and move downward, and the second piston pump 15 starts to accelerate and move downward, and both of them suck liquid at the same time to ensure that the total input flow rate remains unchanged, as shown in stage 6. The first piston pump 12 decelerates to stop, and the second piston pump 15 accelerates to the speed of the set flow rate, completing the switching of the two pumps, as shown in stage 7. The first switch valve 11 is closed, the third switch valve 13 is opened, and the process returns to stage 1, and a single cycle ends.

[0047] (3) See Fig. 9The logic control schematic diagram of a constant current output of a series constant current output unit is shown, the fifth switch valve 21 is in the flow state, the sixth switch valve 23 is in the cut-off state, the fourth piston pump 24 moves upward at a uniform speed, the flow rate is output stably, and the third piston pump 22 moves downward and starts to fill the fluid, as shown in stage 1. The third piston pump 22 is filled with fluid, and the fourth piston pump 24 maintains uniform motion, as shown in stage 2. The fifth switch valve 21 is closed, the sixth switch valve 23 is opened, the third piston pump 22 begins to accelerate upward, and the fourth piston pump 24 begins to decelerate until it stops. Both pump fluid outward at the same time to ensure that the total output fluid flow remains unchanged, as shown in stage 3. The third piston pump 22 still maintains accelerated motion, and the fourth piston pump 24 begins to accelerate downward, as shown in stage 4. The third piston pump 22 moves upward at a uniform speed, and the fourth piston pump 24 moves downward at a uniform speed to fill the fluid. The two movements reach a balance, and the output flow of the third piston pump 22 is the set flow + the absorption flow of the fourth piston pump 24, as shown in stage 5. The fourth piston pump 24 starts to decelerate and move downward to stop, and the third piston pump 22 decelerates and moves upward, as shown in stage 7. The fourth piston pump 24 starts to accelerate and move upward to a specified speed, and the third piston pump 22 still decelerates and moves upward to stop, as shown in stage 8. The fifth switch valve 21 is opened, and the sixth switch valve 23 is closed, returning to stage 1, and a single cycle ends. In one embodiment, the volumes of the two pumps in the series constant current output unit are different. Generally, it is preferred that the volume of the third piston pump 22 is twice or more than twice that of the fourth piston pump 24, so as to ensure a dual-pump structure and control logic with constant and adjustable outlet flow. In practical applications, there is a need for a constant and adjustable flow rate of the pumped fluid, which can also be achieved using the above structure. The difference is that the positions of the series pumps need to be interchanged, while the piston pumps in the parallel constant current delivery unit do not need to make structural changes.

[0048] (4) See Fig.10The logic control diagram of a constant current input of a series constant current input unit is shown, the seventh switch valve 32 is in the cut-off state, the eighth switch valve 34 is in the flow state, the fifth piston pump 31 moves downward at a uniform speed according to the set flow rate, and the sixth piston pump 33 starts to move upward to discharge fluid outward, as shown in stage 1. The fifth piston pump 31 continues to move downward at a uniform speed, the sixth piston pump 33 has emptied the fluid, and the eighth switch valve 34 is closed, as shown in stage 2. The seventh switch valve 32 is opened, the fifth piston pump 31 starts to decelerate and move downward to stop, and the sixth piston pump 33 starts to accelerate downward. Both pump fluid at the same time to ensure that the total flow rate of the absorbed fluid remains unchanged, as shown in stage 3. The fifth piston pump 31 starts to accelerate upward to discharge fluid, and the sixth piston pump 33 continues to accelerate downward, as shown in stage 4. The fifth piston pump 31 moves upward at a uniform speed to discharge fluid, and the sixth piston pump 33 continues to move downward at a uniform speed to absorb fluid. At this time, the flow rate of the sixth piston pump 33 = the output flow rate of the fifth piston pump 31 + the set absorption flow rate, as shown in stage 5. The fifth piston pump 31 begins to decelerate and move upward, and the sixth piston pump 33 begins to decelerate and move downward, as shown in stage 6. The fifth piston pump 31 decelerates to a stop, and the sixth piston pump 33 continues to decelerate and move downward, as shown in stage 7. The fifth piston pump 31 begins to accelerate and move downward to a specified flow rate, and the fifth piston pump 31 continues to decelerate to a stop. As shown in stage 8. Close the seventh switch valve 32, open the eighth switch valve 34, as in stage 1, and a single cycle ends. In one embodiment, the volumes of the two pumps in the series constant current output unit are different, and the volume of the sixth piston pump 33 can be set to be twice or more than twice that of the fifth piston pump 31.

[0049] In summary, the present invention can select a corresponding constant current transmission unit according to user needs, thereby improving the stability of constant current transmission.

[0050] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0051] An embodiment of the present invention provides an electronic device. Specifically, the electronic device includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned implementation methods.

[0052] Fig.11 A structural diagram of an electronic device provided in an embodiment of the present invention, the electronic device 100 includes: a processor 110, a memory 111, a bus 112 and a communication interface 113, the processor 110, the communication interface 113 and the memory 111 are connected via the bus 112; the processor 110 is used to execute an executable module stored in the memory 111, such as a computer program.

[0053] The memory 111 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 113 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0054] The bus 112 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.11 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0055] Among them, the memory 111 is used to store programs, and the processor 110 executes the program after receiving the execution instruction. The method executed by the device for flow process definition disclosed in any of the embodiments of the present invention can be applied to the processor 110 or implemented by the processor 110.

[0056] The processor 110 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 110. The above processor 110 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 111, and the processor 110 reads the information in the memory 111 and completes the steps of the above method in combination with its hardware.

[0057] The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be referred to the previous method embodiments, which will not be repeated here.

[0058] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0059] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A flow rate constant delivery device, characterized in that: include: A first flow channel, a second flow channel, a constant current delivery module and a control module, wherein the control module is connected to the constant current delivery module and the user end respectively, the constant current delivery module is connected to the first flow channel and the second flow channel respectively, and the constant current delivery module includes at least one constant current delivery unit; wherein The control module is used to start the target constant current delivery unit in the constant current delivery module according to the user demand information when receiving the user demand information from the user end; wherein the user demand information is used to reflect the target fluid flow rate; The constant flow delivery unit is used to input fluid through the first flow channel at a constant flow rate, or to output fluid through the second flow channel at a constant flow rate.

2. The constant flow delivery device according to claim 1, characterized in that: The constant current delivery unit comprises: a parallel constant current delivery unit, the parallel constant current delivery unit comprises: a first cavity and a second cavity, the first cavity comprises: a first switch valve, a third switch valve and a first piston pump, the second cavity comprises: a second switch valve, a fourth switch valve and a second piston pump; wherein, The first piston pump is connected to the first switch valve and the third switch valve respectively, the first switch valve is connected to the first flow channel, and the third switch valve is connected to the second flow channel. The first piston pump includes a first piston, which is used to fill the fluid through the first flow channel when the first piston moves downward and the first switch valve is opened, and output the fluid through the second flow channel when the first piston moves upward and the third switch valve is opened; The second piston pump is connected to the second switch valve and the fourth switch valve respectively, the second switch valve is connected to the first flow channel, and the fourth switch valve is connected to the second flow channel. The second piston pump includes a second piston, which is used to fill the fluid through the first flow channel when the second piston moves downward and the second switch valve is opened, and to output the fluid through the second flow channel when the second piston moves upward and the fourth switch valve is opened.

3. The constant flow delivery device according to claim 1, characterized in that: The constant current delivery unit further includes: a series constant current output unit, the series constant current output unit includes: a third cavity and a fourth cavity, the third cavity includes: a fifth switch valve and a third piston pump, the fourth cavity includes: a sixth switch valve and a fourth piston pump; wherein, The fifth switch valve is connected to the third piston pump and the first flow channel respectively, the third piston pump includes a third piston, and the third piston pump is used to fill the fluid through the first flow channel when the third piston moves downward and the fifth switch valve is opened, and to output the fluid to the fourth cavity and, or output the fluid through the second flow channel when the third piston moves upward; The sixth switch valve is connected to the third piston pump and the fourth piston pump respectively, the fourth piston pump is connected to the second flow channel, the fourth piston pump includes a fourth piston, and the fourth piston pump is used to fill the fluid through the first flow channel and, or fill the fluid through the third cavity when the fourth piston moves downward and the sixth switch valve is opened, and output the fluid through the two flow channels when the fourth piston moves upward.

4. The constant flow delivery device according to claim 1, characterized in that: The constant current delivery unit further includes: a series constant current input unit, the series constant current input unit includes: a fifth cavity and a sixth cavity, the fifth cavity includes: a seventh switch valve and a fifth piston pump, the sixth cavity includes: an eighth switch valve and a sixth piston pump; wherein, The fifth piston pump is connected to the first flow channel and the seventh switch valve respectively, and the fifth piston pump includes a fifth piston. The fifth piston pump is used to fill the fluid through the first flow channel when the fifth piston moves downward, and to output the fluid to the sixth cavity and, or output the fluid through the second flow channel when the fifth piston moves upward and the seventh switch valve is opened; The sixth piston pump is connected to the seventh switch valve and the eighth switch valve respectively, the eighth switch valve is connected to the second flow channel, the sixth piston pump includes a sixth piston, and the sixth piston pump is used to fill the fluid through the first flow channel and, or fill the fluid through the fifth cavity when the sixth piston moves downward, and to output the fluid through the second flow channel when the sixth piston moves upward and the eighth switch valve is opened.

5. The constant flow conveying device according to claims 2-4, characterized in that: When the parallel constant flow delivery unit enters a constant flow output state, the sum of the fluid output by the first piston pump through the second flow channel and the fluid output by the second piston pump through the second flow channel is a constant value; When the parallel constant flow delivery unit enters a constant flow input state, the sum of the fluid input by the first piston pump through the first flow channel and the fluid input by the second piston pump through the first flow channel is a constant value; The sum of the fluid outputted by the third piston pump of the series constant current output unit through the second flow channel and the fluid outputted by the fourth piston pump through the second flow channel is a constant value; The sum of the fluid input through the first flow channel by the fifth piston pump of the series constant current input unit and the fluid input through the first flow channel by the sixth piston pump is a constant value.

6. The constant flow delivery device according to claim 5, characterized in that: Each switch valve in the constant flow delivery unit includes: a stop valve and, or a rotary cut valve; wherein, The stop valve and / or the rotary cut valve are used to perform opening and / or closing operations without changing the flow in each flow channel.

7. A control method for a constant flow conveying device, characterized in that: The method is applied to the control module of the constant flow delivery device according to any one of claims 1 to 6, and the method comprises: Acquire user demand information of the user terminal, wherein the demand information includes device demand information; Determine a target constant current transmission unit according to the device requirement information; Acquire a cycle control instruction, wherein the cycle control instruction includes a piston pump working instruction and a switch valve working instruction at each time point during the cycle control process, the switch valve working instruction includes: an opening instruction and a closing instruction, and the piston pump working instruction includes: an acceleration movement instruction, a deceleration movement instruction, a uniform speed movement instruction, a forward movement instruction, and a reverse movement instruction; The power-on instruction and the cycle control instruction are sent to the target constant current transmission unit, so that the target constant current transmission unit constantly outputs or inputs the target flow value determined in the flow demand information.

8. The control method of the constant flow conveying device according to claim 7, characterized in that: The demand information also includes: flow demand information, and the step of obtaining the cycle control instruction includes: The cycle control instruction is determined by a preset instruction generation module based on the flow demand information and the target constant current delivery unit.

9. A server, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the method according to any one of claims 7 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the method according to any one of claims 7 to 8.

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