CN115245454A - A high-pressure gas storage external counterpulsation air circuit system and its control method - Google Patents

Abstract

A high-pressure gas storage external counterpulsation gas circuit system and a control method thereof, the gas circuit system comprises: an air compressor, a gas storage tank, a pressure-stabilizing valve, a sequential charging and exhausting module and an air bag part; the air bag part includes at least An air bag; the air storage tank, the pressure regulator valve, the sequential charging and exhausting module and the air bag are connected in sequence to form an air circuit, and the air compressor is connected to the air storage tank for inflation; the sequential charging and exhausting module includes an exhaust solenoid valve , Inflatable solenoid valve, safety valve and multi-way valve block. The high-pressure gas storage external counterpulsation gas circuit system proposed by the present invention provides high-pressure gas through the cooperation of an air compressor and a gas storage tank, which solves the problem of large volume of the external counterpulsation gas circuit. In the present invention, the air path is adjusted by the sequential charging and exhausting module, so that the air bag can be inflated, exhausted and pressure maintained, and the air path is flexible and easy to control. Combined with the cooperation of the sequential inflation and exhaust module and high-pressure gas, the airbag can be quickly inflated and the duration of the effective treatment pressure stage can be improved.

Description

A high-pressure stored gas external counterpulsation air circuit system and its control method

technical field

The invention relates to the field of medical devices, in particular to a high-pressure stored gas external counterpulsation air circuit system and a control method thereof.

Background technique

External counterpulsation is a method of reducing and eliminating the symptoms of angina pectoris and improving the hypoxic-ischemic state of important organs through external non-invasive compression of the lower body. It is also a medical device for preventing and treating cardiovascular and cerebrovascular diseases. It inflates and pressurizes the air bag during the diastolic period through the air bag wrapped in the limbs and buttocks, so that the blood in the arteries of the limbs is driven back to the aorta, which significantly increases the diastolic pressure, increases the blood flow to the heart, and reduces the afterload of the heart; During the systole period, the air bag is quickly exhausted, the pressure is relieved, the systolic pressure in the aorta is reduced, the resistance of the heart during the ejection period is minimized, and the blood is accelerated to the distal end, thereby achieving the counterpulsation effect.

In the traditional pneumatic external counterpulsation device, the pressure in the air storage tank does not exceed 60Kpa, resulting in the large volume of the air storage tank, which is difficult to transport and use. At the same time, due to the low pressure in the air storage tank, it takes a long time to reach the pressure of the airbag treatment. In a pressure-holding period, the time in the stage of effective therapeutic pressure is relatively short.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned defects of large volume and short effective treatment pressure stage of the pneumatic external counterpulsation device in the prior art, the present invention proposes a high-pressure stored gas external counterpulsation air circuit system and its control method.

A high-pressure stored gas external counterpulsation air circuit system proposed by the present invention includes: an air compressor, a gas storage tank, a pressure stabilizing valve, a sequential inflation and exhaust module, and an airbag part; the airbag part includes at least one airbag;

The air storage tank, the pressure stabilizing valve, the sequential inflation and exhaust module and the air bag are partly connected in sequence to form an air path, and the air compressor is connected to the air storage tank for inflation;

The sequential inflation and exhaust module includes an exhaust solenoid valve, an inflation solenoid valve, a safety valve and a multi-way valve block; the multi-way valve block is provided with interconnected exhaust channels, inflation channels and air bag channels; the exhaust solenoid valve The air intake end is connected with the exhaust passage, and the air outlet end of the exhaust solenoid valve is open-connected; the air intake end of the inflation solenoid valve is connected with the output end of the pressure stabilizing valve, the air outlet end of the inflation solenoid valve is connected with the inflation passage, and the airbag passage is connected with the airbag The numbers are equal and in one-to-one correspondence, and each airbag channel is connected to the corresponding airbag;

The safety valve is connected with the charging solenoid valve and communicated with the gas outlet of the charging solenoid valve.

Preferably, the sequential inflation and exhaust module also includes an exhaust connection pipe and an inflation connection pipe, the exhaust connection pipe is used to connect the exhaust solenoid valve and the multi-way valve block, and the inflation connection pipe is used to connect the inflation solenoid valve and the multi-way valve block ;The safety valve is fixedly connected to the inflation solenoid valve, and the inflation connection pipe is detachably connected to the inflation solenoid valve/multi-way valve block; the exhaust connection pipe is detachably connected to the exhaust solenoid valve/multi-way valve block.

Preferably, both the inflation connecting pipe and the exhaust connecting pipe are flexible pipes.

Preferably, both the inflatable connecting pipe and the exhaust connecting pipe are detachably connected to the multi-way valve block; one end of the inflatable connecting pipe connected to the multi-way valve block is provided with a first ring pipe surrounding the periphery of the inflatable connecting pipe, and the first ring pipe is connected to the multi-way valve block. The inner circumference of the inflation connecting pipe is connected; the inner wall of the inflation channel is provided with a first groove for accommodating the first annular pipe; one end of the exhaust connecting pipe connected to the multi-way valve block is provided with a second annular pipe surrounding the outer periphery of the exhaust connecting pipe , the second ring pipe communicates with the inner circumference of the exhaust connecting pipe; the inner wall of the exhaust channel is provided with a second groove for accommodating the second ring pipe; the first ring pipe and the inflation connecting pipe are integrally formed, the second ring pipe and the exhaust The gas connection pipe is integrally formed.

Preferably, the number of the sequential inflation and exhaust modules and the airbag parts are equal and in one-to-one correspondence, and the airbag channels of each sequential inflation and exhaust module are connected to the airbags in the corresponding airbag part.

Preferably, it also includes a control module and an airbag detection part corresponding to the airbag part; the control module is respectively connected to the airbag detection part and the inflation solenoid valve and exhaust solenoid valve of each sequential inflation and exhaust module;

The sequential inflation and exhaust module has three working states; in the first working state, both the inflation solenoid valve and the exhaust solenoid valve are closed, and the air bag part is in a closed state; in the second working state, the inflation solenoid valve is turned on, and the exhaust The solenoid valve is closed, and the airbag part is in the inflated state; in the third working state, the inflation solenoid valve is closed, the exhaust solenoid valve is opened, and the airbag part is connected to the outside and deflated;

The airbag detection part is used to detect the pressure of each airbag in the airbag part; the control module is used to control the corresponding sequential inflation and exhaust module to switch between the first working state and the second working state according to the detection value of the airbag detection part; the control module also It is used to switch the sequential inflation and exhaust module to the third working state to partially deflate the airbag.

Preferably, the outlet end of the inflatable solenoid valve is provided with a second pressure sensor, the control module is respectively connected to the second pressure sensor and the safety valve, and the control module is used to control the safety valve when the detection value of the second pressure sensor is greater than the set safety threshold open.

Preferably, the air storage tank is provided with a first pressure sensor for detecting its pressure, and the control module is also used to control the operation of the air compressor according to the pressure signal of the first pressure sensor, so that the pressure of the air storage tank is maintained at a set value within the pressure range.

The invention also proposes a control method for the high-pressure stored gas external counterpulsation gas circuit system, which prevents excessive pressure from being inflated too quickly and ensures the safety of high-pressure inflation.

The present invention proposes a control method for a high-pressure stored gas external counterpulsation gas circuit system. The control method is applicable to the high-pressure stored gas external counterpulsation gas circuit system to control the air bag part of the gas circuit system in the working state. The pressure of the air bag; the control method comprises the following steps:

S1. Monitor the pressure of the air storage tank in real time. When the pressure of the air storage tank is lower than the lower limit of the set pressure range, control the air compressor to inflate the air storage tank until the pressure of the air storage tank reaches the upper limit of the set pressure range. value, so that the air pressure of the air storage tank is within the set pressure range in real time;

S2. Obtain the corresponding relationship between different pressure thresholds and inflation time;

S3. Obtain the inflation duration corresponding to the pressure threshold as the inflation target as the target value;

S4. When the airbag is inflated, switch the sequential inflation and exhaust module corresponding to the airbag to the second working state to inflate;

S5. When the continuous inflation time reaches the target value, switch the sequential inflation and exhaust module to the first working state; judge whether the airbag pressure is equal to the inflation target; if yes, return to step S4 at the next inflation; when the airbag pressure is greater than the inflation target , then update the target value to target value - float value, and then return to step S4 at the next inflation; when the airbag pressure is less than the inflation target, update the target value to target value + float value, and then return to step S4 at the next inflation S4: The float value is greater than or equal to 1 millisecond and less than or equal to 10 milliseconds.

The advantages of the present invention are:

(1) A high-pressure stored gas external counterpulsation gas circuit system proposed by the present invention provides high-pressure gas through the cooperation of an air compressor and a gas storage tank, which solves the problem of large volume of the external counterpulsation gas circuit. In the present invention, the gas path is adjusted through the sequential inflation and exhaust module to realize the inflation, exhaust and pressure maintenance of the air bag, and the gas path is flexible and easy to control. Combined with the cooperation of sequential inflation and exhaust modules and high-pressure gas, the airbag can be quickly inflated and the duration of the effective treatment pressure stage can be improved.

(2) In the present invention, the inflation solenoid valve and the exhaust solenoid valve are detachably connected to the multi-way valve block through the inflation connection pipe and the exhaust connection pipe respectively, and the inflation solenoid valve, the exhaust solenoid valve and the multi-way valve block, the three It can be disassembled flexibly for easy storage and transportation. Both the inflation connecting pipe and the exhaust connecting pipe are made of hoses, which reduces the need for the placement environment when the sequential inflation and exhaust modules work, and facilitates the application of the high-pressure gas storage external counterpulsation gas circuit system in various environments.

(3) The inflatable connecting pipe is connected to the multi-way valve block through the engagement of the first ring pipe and the first groove. The inflatable connecting pipe is a flexible pipe, and the first ring pipe can be inserted into the first groove or disengaged from the first groove through deformation of the inflatable connecting pipe. When the first ring tube is inserted into the first groove, when the inflatable solenoid valve is opened, high-pressure gas flows through the inflatable connecting tube, and the first ring tube communicates with the inflatable connecting tube to be propped up and expanded by the high-pressure gas, so that the first ring The tube fits closely with the first groove, so as to realize the airtight connection between the inflatable connecting tube and the multi-way valve block. Similarly, the exhaust connection pipe is connected to the multi-way valve block through the engagement of the second ring pipe and the second groove, which is convenient for disassembly and ensures airtightness during connection.

(4) The sequential inflation and exhaust modules are in one-to-one correspondence with the airbag parts, and the pressure regulator valve is connected to the corresponding airbag in the airbag part through the sequential inflation and exhaust modules. When the airbag part contains multiple airbags, the pressure required for the work of the multiple airbags is the same, and the unified control of the airbags with the same treatment pressure is realized. Compared with the independent control of each airbag, the present invention simplifies the air circuit structure and saves components. Quantity reduces cost.

(5) The setting of the safety valve can avoid the excessive pressure of the air bag and cause safety risks. The safety valve is connected with the inflation solenoid valve, so that the safety protection of multiple airbags connected with the same sequential inflation and exhaust module is realized.

(6) The control method of a high-pressure stored gas external counterpulsation air circuit system proposed by the present invention, combined with an air compressor, the gas storage tank inflates the air bag with high-pressure gas, and the inflation speed is extremely fast, thereby shortening the inflation time and prolonging the maintenance period. pressure time. Adjust the duration of the next inflation according to the pressure of the inflated airbag. The inflation duration of each inflation is a preset value, which is beneficial to avoid the risk of high-pressure over-inflation, ensure high-pressure rapid inflation and over-inflation, and the airbag pressure is always within a safe range. .

(7) In the present invention, through the combination of high-pressure fast charging and pre-set target value, the risk of excessive pressure caused by the over-inflation of the air bag rebutted by high-pressure fast charging is overcome, which is beneficial to the high-pressure fast charging in vitro counterpulsation technology security applications in .

Description of drawings

Figure 1 is a schematic diagram of the connection of a high-pressure stored gas external counterpulsation gas circuit system;

Fig. 2 is a perspective view of a sequential inflation and exhaust module;

Fig. 3 is a schematic cross-sectional view of a sequential inflation and exhaust module;

Figure 4 is a schematic diagram of the connection of another high-pressure stored gas external counterpulsation gas circuit system;

Fig. 5 is a flow chart of a control method for a high-pressure stored gas external counterpulsation gas circuit system;

Illustration: 1-air compressor; 2-air storage tank; 3-stabilizing valve; 4-first pressure sensor; 5-sequential charging and exhausting module; 51-exhaust solenoid valve; 52-charging solenoid valve ;53-safety valve; 54-multi-way valve block; 541-airbag channel; 542-inflatable channel; 543-exhaust channel; 55, exhaust connecting pipe; -Airbag part; 7-Control module; 8-Relay; 9-Airbag detection unit.

Detailed ways

A high-pressure stored gas external counterpulsation gas circuit system

A high-pressure stored gas external counterpulsation air circuit system proposed in this embodiment includes: an air compressor 1, a gas storage tank 2, a pressure stabilizing valve 3, a sequential inflation and exhaust module 5, an airbag part 6, and a control module 7 And the airbag detection part 9. The air compressor 1 is connected to the air storage tank 2 for inflation and pressurization. The air storage tank 2, the pressure stabilizing valve 3, the sequential charging and exhausting module 5 and the airbag part 6 are sequentially connected to form an air circuit. The valve 3 outputs stable air pressure. When the sequential inflation and exhaust module 5 is turned on, the stable air pressure output by the pressure stabilizing valve 3 inflates each air bag in the air bag part 6 . The airbag portion 6 includes at least one airbag.

The sequential inflation and exhaust module 5 includes an exhaust solenoid valve 51 , an inflation solenoid valve 52 , a safety valve 53 and a multi-way valve block 54 . The multi-way valve block 54 is provided with an exhaust passage 543 , an inflation passage 542 and an air bag passage 541 which communicate with each other. The intake end of the exhaust solenoid valve 51 communicates with the exhaust passage 543, the intake end of the inflation solenoid valve 52 communicates with the output end of the pressure stabilizing valve 3, the outlet end of the inflation solenoid valve 52 communicates with the inflation passage 542, and the air bag passage 541 The number of airbags in the airbag part 6 is equal and corresponding to each other, and each airbag channel 541 communicates with the corresponding airbag.

The sequential inflation and exhaust modules 5 are in one-to-one correspondence with the airbag parts 6 , and the pressure regulator valve 3 is connected to the corresponding airbags in the airbag part 6 through the sequential inflation and exhaust modules 5 . When the airbag portion 6 includes a plurality of airbags, the pressure required for the operation of the plurality of airbags is the same. For example, a certain high-pressure storage external counterpulsation air system includes a hip airbag and two thigh airbags. The two thigh airbags require the same pressure, but the thigh airbag and the hip airbag require different pressures, and the two thigh airbags belong to the same airbag. The airbag part 6; the hip airbag and the thigh airbag belong to different airbag parts.

The sequential inflation and exhaust module 5 has three working states. In the first working state, both the inflation solenoid valve 52 and the exhaust solenoid valve 51 are closed, the pressure stabilizing valve 3 is cut off from the airbag part 6, and the airbag part 6 is in a closed state, neither inflating nor exhausting.

In the second working state, the inflation solenoid valve 52 is turned on, the exhaust solenoid valve 51 is turned off, the pressure regulator valve 3 is connected to the airbag part 6, the airbag part 6 is in the inflated state, and the gas storage tank 2 outputs a stable pressure through the pressure regulator valve 3. The air pressure inflates each airbag.

In the third working state, the inflation solenoid valve 52 is closed, the exhaust solenoid valve 51 is opened, the pressure stabilizing valve 3 is cut off from the airbag part 6, and the airbag part 6 communicates with the outside through the exhaust solenoid valve 51 and deflates.

In the second working state, the high-pressure gas of the gas storage tank 2 flows fast, which can realize rapid inflation of the airbag; in the first working state, the airbag can be maintained in pressure.

In this embodiment, the corresponding airbag can be inflated or exhausted by switching the working state of the sequential inflation and exhaust module 5 . In this embodiment, the cooperation of the air compressor 1 and the gas storage tank 2 can ensure that the gas in the gas storage tank 2 is always in a high-pressure state, thereby ensuring that when the sequential charging and exhausting module 5 is in the second working state, the gas storage The high-pressure gas output from the tank 2 rushes into the airbag quickly, improving the inflation efficiency of the airbag and shortening the inflation time.

The safety valve 53 communicates with the air outlet of the inflation solenoid valve 52 , that is, the safety valve 53 communicates with each air bag connected to the sequential inflation and exhaust module 5 . The safety valve 53 is opened to release the pressure when the pressure at the inlet end of the inflation solenoid valve 52 is higher than the set safety threshold, so as to avoid the excessive pressure of the air bag and cause a safety risk. The safety valve 53 is connected to the inflation solenoid valve 52 , so that the safety protection of multiple airbags connected to the same sequential inflation and exhaust module 5 is realized.

During specific implementation, the safety valve 53 can be a valve that opens automatically when a certain pressure is reached, or can be set as an electromagnetic valve controlled by the control module. In this embodiment, a second pressure sensor 57 is provided at the outlet end of the inflation solenoid valve 52, and the control module is connected to the second pressure sensor 57 and the safety valve 53 respectively. When the safety threshold is set, the safety valve 53 is controlled to open, so as to ensure that the pressure of the air bag is within the safety range in real time.

In this embodiment, the exhaust solenoid valve 51 is connected to the multi-way valve block 54 through the exhaust connection pipe 55 , and the inflation solenoid valve 52 is connected to the multi-way valve block 54 through the inflation connection pipe 56 . That is, the exhaust connecting pipe 55 is used to connect the air intake end of the exhaust solenoid valve 51 and the exhaust pipe of the multi-way valve block 54, and the charging connecting pipe 56 is used to connect the gas outlet end of the charging solenoid valve 52 and the outlet of the multi-way valve block 54. Inflatable pipe. The safety valve 53 is fixedly connected with the inflation solenoid valve 52, the inflation connection pipe 56 is detachably connected with the inflation solenoid valve 52/multi-way valve block 54; the exhaust connection pipe 55 is detachably connected with the exhaust solenoid valve 51/multi-way valve block 54 , so as to ensure that both the inflation solenoid valve 52 and the exhaust solenoid valve 51 are detachably connected to the multi-way valve block 54, which facilitates the storage and transportation of the sequential inflation and exhaust module 5.

In this embodiment, both the inflation connecting pipe 56 and the exhaust connecting pipe 55 are hoses, so as to reduce the demand for the placement environment when the sequential inflation and exhaust module 5 works, and facilitate the high-pressure gas storage external counterpulsation gas circuit system applications in various environments.

Specifically, in this embodiment, both the inflation connecting pipe 56 and the exhaust connecting pipe 55 are detachably connected to the multi-way valve block 54 . One end of the inflatable connecting pipe 56 connected to the multi-way valve block 54 is provided with a first ring pipe surrounding the outer periphery of the inflatable connecting pipe 56, and the first ring pipe communicates with the inner periphery of the inflatable connecting pipe 56; The first groove of the first collar. The first ring pipe is integrally formed with the inflation connecting pipe 56 . In this way, the inflatable connecting pipe 56 is connected to the multi-way valve block 54 by engaging the first annular pipe with the first groove. The inflatable connecting pipe 56 is a hose, and the inflatable connecting pipe 56 can be deformed so that the first annular pipe can be inserted into the first groove or come out of the first groove. When the first ring pipe is inserted into the first groove, when the inflation solenoid valve 52 is opened, high-pressure gas flows through the inflation connection pipe 56, and the first ring pipe communicates with the inflation connection pipe 56 to be propped up and expanded by the high-pressure gas. The first ring pipe is closely fitted to the first groove, so as to realize the airtight connection between the inflatable connecting pipe 56 and the multi-way valve block 54 .

Similarly, one end of the exhaust connecting pipe 55 connected to the multi-way valve block 54 is provided with a second ring pipe surrounding the outer periphery of the exhaust connecting pipe 55, and the second ring pipe communicates with the inner periphery of the exhaust connecting pipe 55; the exhaust passage 543 A second groove for accommodating the second annular pipe is provided on the inner wall of the second annular pipe, and the second annular pipe is integrally formed with the exhaust connecting pipe 55 .

The exhaust connection pipe 55 is connected to the multi-way valve block 54 through the engagement of the second ring pipe and the second groove. The exhaust connecting pipe 55 is a hose, and the second annular pipe can be inserted into the second groove or escaped from the second groove through the deformation of the exhaust connecting pipe 55 . When the second ring pipe is inserted into the second groove, when the inflation solenoid valve 52 is opened, high-pressure gas flows through the exhaust connection pipe 55, and the second ring pipe communicates with the exhaust connection pipe 55 to be supported by the high-pressure gas Inflated so that the second ring pipe fits closely with the second groove, thereby realizing the airtight connection between the exhaust connecting pipe 55 and the multi-way valve block 54 .

In this embodiment, each airbag part 6 is provided with an airbag detection part 9 for detecting the pressure of the airbag in the airbag part 6 . During specific implementation, the airbag detection unit 9 is a pressure sensor provided on any airbag. During specific implementation, the airbag detection unit 9 can be combined with the second pressure sensor 57 into one.

The high-pressure stored gas external counterpulsation air circuit system also includes a control module, the control module 7 is used to control the sequential inflation and exhaust module 5 to switch between the first working state and the second working state according to the detection value of the airbag detection part 9, so as to Ensure that the required pressure value can be reached and maintained for the required time when the air bag is inflated. Specifically, in this embodiment, the control module controls the duration of the sequential inflation and exhaust module 5 in the second working state to control the airbag pressure, and the control module controls the sequential inflation and exhaust module 5 in the first working state after inflation. to control the airbag dwell time. The control module 7 is also used to switch the sequential inflation and exhaust module 5 to the third working state to deflate the airbag part 6 .

The air storage tank 2 is provided with a first pressure sensor 4 for detecting its pressure, and the control module 7 is also used to control the work of the air compressor 1 according to the pressure signal of the first pressure sensor 4, so that the pressure of the air storage tank 2 is maintained at the set value. within a given pressure range. That is, when the first pressure sensor 4 detects that the pressure of the air storage tank 2 is lower than the lower limit of the set pressure range, the control module controls the air compressor 1 to inflate the air storage tank 2; when the first pressure sensor 4 detects When the pressure of the air storage tank 2 reaches the upper limit of the set pressure range, the control module controls the air compressor 1 to stop working. During specific implementation, the air compressor 1 can be connected to the power supply through the relay 8, and the control module 7 is connected to the relay 8 and controls the relay 8 to be turned on and off, so as to control the power on and off of the air compressor 1, thereby realizing the control module 7 to control the air compressor 1 working status.

In this embodiment, in order to ensure that the air bag of the air bag part 6 can realize the set pressure when inflating when the high-pressure stored gas external counterpulsation air circuit system is working, and ensure the safety and efficiency of external counterpulsation, the air bag in the air bag , use the following steps to control.

S3. Firstly, the inflation target and the target value are acquired. The inflation target is the pressure value that needs to be achieved when the airbag is inflated, and the target value is the inflation time required when the airbag pressure reaches the inflation target obtained based on experience. During specific implementation, the relationship between different pressure thresholds corresponding to different airbags and the inflation duration can be preset, so that the inflation duration corresponding to the pressure threshold as the inflation target can be directly obtained as the target value according to the correlation relationship.

S4. When the airbag needs to be inflated, switch the sequential inflation and exhaust module 5 corresponding to the airbag to the second working state to inflate.

S5. When the continuous inflation time, that is, the duration of the second working state reaches the target value, switch the sequential inflation and exhaust module 5 to the first working state, and judge whether the airbag pressure is equal to the inflation target;

Yes, return to step S4 during the next inflation; when the airbag pressure is higher than the inflation target, update the target value to the target value - float value, and then return to step S4 during the next inflation; when the airbag pressure is lower than the inflation target, then set the target The value is updated to the target value + float value, and then return to step S4 at the next inflation; the float value is greater than or equal to 1 millisecond and less than or equal to 10 milliseconds.

During external counterpulsation, the airbag is in the cycle of inflating—holding—deflation. In order to ensure the counterpulsation effect, the closer the pressure during holding is to the set value, the better, and the shorter the inflation time, the better. In this embodiment, in a single inflation, the inflation time is specified in advance. Compared with the existing real-time inflation until the pressure of the air bag reaches the set value, the inflation time is greatly shortened in this embodiment. And in this embodiment, the initial value of the target value is an empirical value, and the airbag pressure achieved by inflating according to the empirical value will not be too different from the set value; The pressure is adjusted in real time to the next inflation time, which is the target value, so that with the execution of the inflation and deflation cycle, the pressure holding value gradually approaches the set value to ensure the counterpulsation effect.

In this embodiment, the next inflation duration is adjusted according to the inflated airbag pressure, and the inflation duration of each inflation is a preset value, which greatly improves the inflation efficiency. And in this embodiment, combined with the air compressor 1, the air storage tank 2 inflates the air bag with high-pressure gas, and the inflation speed is extremely fast, thereby shortening the inflation time and prolonging the pressure holding time. In this embodiment, the method of pre-setting the inflation time is beneficial to avoid the risk of high-pressure over-inflation, and ensure that the high-pressure rapid inflation is over-inflated, and the pressure of the airbag is always within a safe range. In this embodiment, through the combination of high-pressure fast charging and preset target value, the risk of excessive pressure caused by the over-inflation of the air bag rebutted by high-pressure fast charging is overcome, which is conducive to the application of high-pressure fast charging in external counterpulsation technology. security application.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (9)

1. A high-pressure stored gas external counterpulsation gas circuit system, characterized in that it includes: an air compressor (1), a gas storage tank (2), a pressure stabilizing valve (3), a sequential inflation and exhaust module (5 ) and an airbag portion (6); the airbag portion (6) includes at least one airbag; The air storage tank (2), the pressure stabilizing valve (3), the sequential inflation and exhaust module (5) and the air bag part (6) are sequentially connected to form an air path, and the air compressor (1) is connected to the air storage tank (2) inflated; The sequential inflation and exhaust module (5) includes an exhaust solenoid valve (51), an inflation solenoid valve (52), a safety valve (53) and a multi-way valve block (54); the multi-way valve block (54) is equipped with Exhaust passage (543), inflation passage (542) and air bag passage (541) that communicate with each other; The air outlet end is empty; the air intake end of the inflation solenoid valve (52) is communicated with the output end of the pressure stabilizing valve (3); The number of airbags is equal and corresponding to each other, and each airbag channel (541) communicates with the corresponding airbag; The safety valve (53) is connected with the inflation solenoid valve (52) and communicated with the gas outlet of the inflation solenoid valve (52). 2. The high-pressure stored gas external counterpulsation air circuit system according to claim 1, characterized in that the sequential inflation and exhaust module (5) also includes an exhaust connection pipe (55) and an inflation connection pipe (56), The exhaust connecting pipe (55) is used to connect the exhaust solenoid valve (51) and the multi-way valve block (54), and the inflation connecting pipe (56) is used to connect the charging solenoid valve (52) and the multi-way valve block (54); The safety valve (53) is fixedly connected to the inflation solenoid valve (52), and the inflation connection pipe (56) is detachably connected to the inflation solenoid valve (52)/multi-way valve block (54); the exhaust connection pipe (55) is connected to the exhaust The solenoid valve (51)/multi-way valve block (54) is detachably connected. 3. The high-pressure stored gas external counterpulsation air circuit system according to claim 2, characterized in that both the inflation connecting pipe (56) and the exhaust connecting pipe (55) are hoses. 4. The high-pressure stored gas external counterpulsation air circuit system according to claim 3, characterized in that both the inflation connecting pipe (56) and the exhaust connecting pipe (55) are detachably connected to the multi-way valve block (54); One end of the inflatable connecting pipe (56) connected to the multi-way valve block (54) is provided with a first ring pipe surrounding the outer periphery of the inflatable connecting pipe (56), and the first ring pipe communicates with the inner periphery of the inflatable connecting pipe (56); The inner wall of (542) is provided with the first groove that is used for accommodating the first ring pipe; One end of the exhaust connecting pipe (55) connected to the multi-way valve block (54) is provided with a ring around the outer circumference of the exhaust connecting pipe (55). The second ring pipe, the second ring pipe communicates with the inner circumference of the exhaust connecting pipe (55); the inner wall of the exhaust passage (543) is provided with a second groove for accommodating the second ring pipe; The connecting pipe (56) is integrally formed, and the second ring pipe and the exhaust connecting pipe (55) are integrally formed. 5. The high-pressure stored gas external counterpulsation air circuit system according to claim 1, characterized in that, the sequential inflation and exhaust modules (5) and the air bag parts (6) are equal in number and correspond one-to-one, and each sequence The airbag channel (541) of the through-type inflation and exhaust module (5) is connected to the airbag in the corresponding airbag part (6). 6. The high-pressure stored gas external counterpulsation gas circuit system according to claim 1, further comprising a control module (7) and an airbag detection unit (9) corresponding to the airbag part (6); the control module Respectively connect the airbag detection part (9) and the inflation solenoid valve (52) and exhaust solenoid valve (51) of each sequential inflation and exhaust module (5); The sequential inflation and exhaust module (5) has three working states; in the first working state, both the inflation solenoid valve (52) and the exhaust solenoid valve (51) are closed, and the air bag part (6) is in a closed state; the second Under the working state, the inflation solenoid valve (52) is turned on, the exhaust solenoid valve (51) is cut off, and the air bag part (6) is in the inflated state; under the third working state, the inflation solenoid valve (52) is turned off, and the exhaust solenoid valve ( 51) Open, the air bag part (6) communicates with the outside and deflates; The airbag detection part (9) is used to detect the pressure of each airbag in the airbag part (6); the control module (7) is used to control the corresponding sequential inflation and exhaust module (5) according to the detection value of the airbag detection part (9). Switching between the first working state and the second working state; the control module (7) is also used to switch the sequential inflation and exhaust module (5) to the third working state to deflate the air bag part (6). 7. The high-pressure stored gas external counterpulsation air circuit system according to claim 6, characterized in that, the outlet end of the inflatable solenoid valve (52) is provided with a second pressure sensor (57), and the control modules are respectively connected to the second pressure sensor (57) and the safety valve (53), the control module (7) is used to control the opening of the safety valve (53) when the detection value of the second pressure sensor (57) is greater than the set safety threshold. 8. The high-pressure stored gas external counterpulsation gas circuit system according to claim 6, characterized in that, the gas storage tank (2) is provided with a first pressure sensor (4) for detecting its pressure, and the control module ( 7) It is also used to control the operation of the air compressor (1) according to the pressure signal of the first pressure sensor (4), so that the pressure of the air storage tank (2) is maintained within the set pressure range. 9. A control method for a high-pressure stored gas external counterpulsation gas circuit system, characterized in that the control method is suitable for the high-pressure stored gas external counterpulsation gas circuit system according to any one of claims 6-8, to control The pressure of each air bag of the air bag part (6) in the working state of the air circuit system; the control method comprises the following steps: S1. Monitor the pressure of the gas storage tank (2) in real time. When the pressure of the gas storage tank (2) is lower than the lower limit of the set pressure range, control the air compressor (1) to inflate the gas storage tank (2) until the The pressure of the gas tank (2) reaches the upper limit of the set pressure range, so that the air pressure of the gas storage tank (2) is within the set pressure range in real time; S2. Obtain the corresponding relationship between different pressure thresholds and inflation time; S3. Obtain the inflation duration corresponding to the pressure threshold as the inflation target as the target value; S4. When the airbag is inflated, the sequential inflation and exhaust module (5) corresponding to the airbag is switched to the second working state to inflate; S5. When the continuous inflation time reaches the target value, switch the sequential inflation and exhaust module (5) to the first working state; judge whether the airbag pressure is equal to the inflation target; if yes, return to step S4 during the next inflation; when the airbag pressure If it is greater than the inflation target, update the target value to the target value - float value, and then return to step S4 during the next inflation; return to step S4; the float value is greater than or equal to 1 millisecond and less than or equal to 10 milliseconds.

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