Air path system of an air bag type external counterpulsation device

Abstract

The utility model discloses a gas path system of gasbag type body external counterpulsation device which can quickly exhaust and has low cost, comprising an air compressor and a gas storage tank, the gas storage tank is connected with the gasbag through an air inlet pipeline, and a first exhaust port and a second exhaust port are arranged on an exhaust valve connected with the gasbag, wherein the first exhaust port is communicated with an air inlet of the air compressor through a negative pressure pipeline, and the second exhaust port is communicated with the atmosphere. By using the negative pressure loop formed by the air inlet of the air compressor and the design of the double exhaust ports of the electromagnetic valve, a strong suction effect can be generated, the exhaust speed of the gasbag is greatly accelerated, and the pressure in the gasbag is rapidly reduced. Meanwhile, the overall structure and complexity of the gas path system are greatly simplified, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an airway system for an airbag-type external counterpulsation device. Background Technology

[0002] External counterpulsation (ECP) is a non-invasive method of applying pressure to the lower body externally to alleviate and eliminate angina symptoms, improve the hypoxia and ischemia state of vital organs, and is also a medical device used to prevent and treat cardiovascular and cerebrovascular diseases. Traditional ECP devices use airbags wrapped around the limbs and buttocks. During diastole, the airbags are sequentially pressurized to promote blood flow back to the aorta and increase coronary perfusion pressure; during systole, the airbags are rapidly deflated to reduce cardiac afterload. Its core mechanism is as follows: during inflation, a positive pressure is generated by an air compressor or pump, and the inflation of the airbags is controlled by a solenoid valve, effectively compressing the blood vessels in the lower limbs; during deflation, the airbags are directly opened to the atmosphere by the solenoid valve, utilizing the pressure difference between the inside and outside of the airbags to achieve rapid deflation. Some devices may also incorporate an external negative pressure generator to assist in the rapid deflation of the airbags. Utility Model Content

[0003] The purpose of this invention is to provide an airway system for a bag-type external counterpulsation device that can quickly expel air and is low in cost.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an air circuit system for an airbag-type external counterpulsation device, including an air compressor and an air tank. The air tank is connected to the airbag through an air inlet pipe. The exhaust valve connected to the airbag is provided with a first exhaust port and a second exhaust port. The first exhaust port is connected to the air inlet of the air compressor through a negative pressure pipe, and the second exhaust port is connected to the atmosphere.

[0005] The air compressor is equipped with a three-way valve at the air inlet. The air inlet of the air compressor is connected to the first port of the three-way valve, the negative pressure pipeline is connected to the second port of the three-way valve, and the third port of the three-way valve is connected to the atmosphere.

[0006] An intake valve is provided in the air intake path. The intake valve and the exhaust valve are integrated into a single structure and constitute a solenoid valve. The inflation port of the solenoid valve is connected to the airbag.

[0007] The solenoid valve is installed on the gas storage tank.

[0008] In the above solution, the negative pressure circuit formed by the air compressor's own air inlet, combined with the dual exhaust port design of the solenoid valve, can generate a strong suction effect, significantly accelerating the exhaust speed of the airbag and rapidly reducing the pressure inside the airbag. At the same time, it eliminates the need for a negative pressure tank and corresponding control valves, greatly simplifying the overall structure and complexity of the air circuit system and significantly reducing costs. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the airway system of an airbag-type external counterpulsation device. Detailed Implementation

[0010] like Figure 1 As shown, a pneumatic system for a pneumatic external counterpulsation device includes an air compressor 10 and an air tank 20. The air tank 20 is connected to an airbag 30 via an intake pipe. An exhaust valve connected to the airbag 30 has a first exhaust port 41 and a second exhaust port 42. The first exhaust port 41 is connected to the air compressor 10's intake port via a negative pressure pipe, while the second exhaust port 42 is open to the atmosphere. The system operates as follows: When the pneumatic external counterpulsation device is running, the air compressor 10 starts working, drawing in air through the intake port, creating a negative pressure at the air compressor 10's intake port. After compression, compressed gas is output from the exhaust port and delivered to the air tank.

[0011] When the airbag 30 needs to be inflated, the compressed gas in the air tank 20 enters the airbag 30 under pressure through the inflation port of the solenoid valve, causing the airbag 30 to expand to meet the pressure requirements for inflation of the airbag 30 in external counterpulsation therapy.

[0012] During the exhaust phase, the negative pressure created by the continuous intake of air from the air compressor 10 plays a role. Combined with the solenoid valve, the air inside the airbag 30 can be quickly extracted through the first exhaust port 41. The air not drawn in by the air compressor 10 is directly discharged to the outside air through the second exhaust port 42, thus efficiently completing the exhaust process of the airbag 30 and realizing the cycle of inflation and deflation of the airbag 30 during external counterpulsation therapy.

[0013] To prevent insufficient air intake of the air compressor 10, a three-way valve 11 is installed at the air intake of the air compressor 10. The air intake of the air compressor 10 is connected to the first interface of the three-way valve 11, the negative pressure pipeline is connected to the second interface of the three-way valve 11, and the third interface of the three-way valve 11 is connected to the atmosphere.

[0014] Similarly, an intake valve is provided in the air intake path. The intake valve and exhaust valve are integrated into a single structure and form a solenoid valve 40. The inflation port 43 of the solenoid valve 40 is connected to the airbag 30. The inflation and deflation of the airbag 30 are controlled by the same solenoid valve 40, reducing costs.

[0015] The solenoid valve 40 is installed on the air tank 20, which can eliminate redundant pipelines and allow compressed gas to enter the air bladder from the air tank 20 through the solenoid valve 40, reducing frictional resistance and improving inflation efficiency. In addition, the close-range layout shortens the signal transmission delay, making the inflation and deflation of the air bladder 30 more precise in sync with the new R-wave trigger signal, ensuring timely pressurization during diastole and rapid deflation during systole, thus optimizing hemodynamic effects.

[0016] The pneumatic system of this invention has at least the following beneficial effects: 1. Exhaust Efficiency and Treatment Precision: Utilizing the negative pressure circuit formed by the air compressor 10's own air inlet, combined with the dual exhaust port design of the solenoid valve 40, a strong suction effect can be generated, significantly accelerating the exhaust speed of the airbag and rapidly reducing the pressure inside the airbag 30. This rapid and precise exhaust process allows the pressure changes in the airbag 30 to better match the heart's systolic and diastolic cycles, significantly improving the timing precision of external counterpulsation therapy, thereby enhancing the treatment effect and more effectively improving myocardial blood supply and other conditions.

[0017] 2. System Simplification and Cost Control: This design eliminates the need for additional dedicated negative pressure generation devices, such as negative pressure pumps. It directly utilizes the existing structure of the air compressor 10 to construct the negative pressure circuit, eliminating the need for a negative pressure tank and corresponding control valves. This not only reduces the number of components and the complexity of the device but also saves on the procurement, installation, and maintenance costs associated with additional negative pressure devices. Furthermore, it reduces the size of the device, facilitating the miniaturization of external counterpulsation devices.

[0018] 3. Integration and Operational Reliability: Through optimized design of the air circuit, functions such as negative pressure generation, gas transmission, and exhaust control are integrated into the existing system consisting of air compressor 10, air tank 20, and solenoid valve 40, improving the integration of the air circuit system. This reduces system failure points, and the coordinated operation between components is more stable, lowering the probability of failures caused by complex structures or additional devices. This ensures the reliability of the external counterpulsation device during long-term operation, reducing maintenance frequency and costs.

Claims

1. An airway system for a pneumatic external counterpulsation device, comprising an air compressor (10) and an air tank (20), wherein the air tank (20) is connected to an airbag (30) via an air inlet pipe, characterized in that: The exhaust valve connected to the airbag (30) is provided with a first exhaust port (41) and a second exhaust port (42), wherein the first exhaust port (41) is connected to the air inlet of the air compressor (10) through a negative pressure pipeline, and the second exhaust port (42) is connected to the atmosphere.

2. The airway system of the pneumatic external counterpulsation device according to claim 1, characterized in that: A three-way valve (11) is installed at the air inlet of the air compressor (10). The air inlet of the air compressor (10) is connected to the first interface of the three-way valve (11), the negative pressure pipeline is connected to the second interface of the three-way valve (11), and the third interface of the three-way valve (11) is connected to the atmosphere.

3. The airway system of the pneumatic external counterpulsation device according to claim 2, characterized in that: An intake valve is provided on the intake path. The intake valve and the exhaust valve are integrated into a single structure and constitute a solenoid valve (40). The inflation port (43) of the solenoid valve (40) is connected to the airbag (30).

4. The airway system of the pneumatic external counterpulsation device according to claim 3, characterized in that: The solenoid valve (40) is installed on the gas storage tank (20).

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