A multi-cavity airbag with independent control of air pressure in each cavity

Abstract

The utility model relates to a kind of every cavity air pressure independent control's quick inflation and deflation system of multi-cavity air bag, including first three-way electromagnetic valve, second three-way electromagnetic valve and first three-way pipe, the air outlet of air pump is connected with the A port of first three-way electromagnetic valve, the B port of first three-way electromagnetic valve is connected with the B port of first three-way pipe, the A port of first three-way pipe is connected with multiple two-way valve groups, the C port of first three-way pipe is connected with the C port of second three-way electromagnetic valve, the air inlet of air pump is connected with the A port of second three-way electromagnetic valve;The C port of first three-way electromagnetic valve and the B port of second three-way electromagnetic valve are communicated with external air;Two-way valve group includes upper two-way valve and lower two-way valve, and second three-way pipe is connected between upper two-way valve and lower two-way valve, and the output end of second three-way pipe is connected with air bag by multi-cavity air bag joint.The utility model realizes quick inflation and deflation, and realizes the air pressure in single air bag is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a rapid inflation and deflation system for a multi-chamber airbag with independent pressure control for each chamber. Background Technology

[0002] The pressure therapy device creates circulatory pressure on the limbs and tissues through orderly and repeated inflation and deflation. It applies uniform and orderly compression from the distal to the proximal end of the limb, promoting blood circulation, reducing limb edema, and preventing venous thrombosis. However, existing equipment has some problems in its use:

[0003] (1) The multi-chamber airbag deflates too slowly, and the residual gas in the multi-chamber makes it inconvenient for patients to take off or put on the airbag. Doctors often need to manually unplug the multi-chamber airbag connector and squeeze the airbag to deflate it. This is inconvenient and may also squeeze the patient's limbs, causing discomfort or injury.

[0004] (2) Repeated plugging and unplugging increases wear on the connector, causing air leakage;

[0005] (3) Multi-chamber airbags have the same pressure, which cannot be used by patients with partial limb injuries (especially patients after limb surgery), and will aggravate the injury. These patients are more likely to develop venous thrombosis.

[0006] Therefore, there is an urgent need for an inflation and deflation system that can quickly deflate and allow each airbag to be independently controlled. Summary of the Invention

[0007] To address the problems of slow deflation and the inability to control airbags independently in existing inflation / deflation systems, this invention proposes a rapid inflation / deflation system for multi-chamber airbags, where the air pressure in each chamber is independently controlled. The system comprises a first three-way solenoid valve, a second three-way solenoid valve, and a first three-way pipe, forming an inflation channel and a deflation channel. The deflation channel utilizes an air pump to complete the deflation, thus increasing the deflation speed. A two-way valve group is also included to regulate the air pressure within each individual airbag.

[0008] To achieve the above objectives, this utility model proposes a rapid inflation and deflation system for a multi-chamber airbag with independent pressure control for each chamber. The system includes an air pump, an air delivery pipe connected to the air delivery pipe, and a multi-chamber airbag connector connected to multiple airbags. The air delivery pipe is characterized by having a first three-way solenoid valve, a second three-way solenoid valve, and a first three-way pipe, each including an A port, a B port, and a C port.

[0009] The air pump's outlet is connected to port A of the first three-way solenoid valve, port B of the first three-way solenoid valve is connected to port B of the first three-way pipe, port A of the first three-way pipe is connected to multiple two-way valve groups, port C of the first three-way pipe is connected to port C of the second three-way solenoid valve, and port A of the second three-way solenoid valve is connected to the air pump's inlet.

[0010] The C port of the first three-way solenoid valve and the B port of the second three-way solenoid valve are connected to the outside air.

[0011] The two-way valve group includes an upper two-way valve and a lower two-way valve. A second three-way pipe is connected between the upper two-way valve and the lower two-way valve. The output end of the second three-way pipe is connected to the airbag through a multi-chamber airbag connector.

[0012] The air pump, the first three-way solenoid valve, the second three-way solenoid valve, the multiple upper two-way valves, and the multiple lower two-way valves are all equipped with drive circuits, and the drive circuits are connected to a controller.

[0013] Furthermore, the two-way valve assembly also includes a first gas distribution pipe and a second gas distribution pipe. The first gas distribution pipe is a pipe structure with one end open and the other end closed. The open side of the first gas distribution pipe is connected to the C port of the first three-way solenoid valve.

[0014] The second gas distribution pipe is a pipe structure with open ends. Multiple gas pipes are equidistantly arranged on the first and second gas distribution pipes. The multiple gas pipes of the first gas distribution pipe are connected to the upper two-way valve, and the multiple gas pipes of the second gas distribution pipe are connected to the lower two-way valve. A pressure sensor is installed on the first gas distribution pipe.

[0015] The output of the pressure sensor is connected to an AD chip, and the output of the AD chip is connected to a controller.

[0016] Rapid deflation is achieved through a combination of the first gas distribution pipe and the upper two-way valve assembly. The combination of the first gas distribution pipe and the upper two-way valve allows for pressure control of a single airbag. Rapid deflation is only used when the equipment needs to be detached. During operation, airbag deflating is achieved through the combination of the lower two-way valve and the second gas distribution pipe.

[0017] An AD chip is used to perform analog-to-digital conversion on the detection signal from the barometric pressure sensor, enabling the acquisition and processing of the barometric pressure sensor signal.

[0018] Furthermore, the driving circuit includes an air pump driving circuit, which includes a push-pull circuit and a MOS circuit. The input terminal of the push-pull circuit is connected to a controller, and the output terminal of the push-pull circuit is connected to the MOS circuit. The air pump is connected to a power supply through the MOS circuit.

[0019] The controller outputs a PWM signal and sets the two power devices in the push-pull circuit to conduct alternately to enhance the driving capability, so that the power supply circuit of the air pump is controlled according to the PWM signal.

[0020] Furthermore, the driving circuit includes multiple MOS driving circuits, the gate (G) of the MOS transistors of the multiple MOS driving circuits is connected to the controller, and the first three-way solenoid valve, the second three-way solenoid valve, the multiple upper two-way valves and the multiple lower two-way valves are all connected to the power supply through the MOS driving circuits.

[0021] The MOS drive circuit is set up to control the first three-way solenoid valve and the second three-way solenoid valve respectively, thereby realizing the circuit switching of inflation and deflation. The MOS drive circuit controls the upper two-way valve and the lower two-way valve respectively to provide the hardware basis for the air pressure regulation in the airbag.

[0022] Furthermore, the air pump is equipped with an encoder, which is used to detect the rotational speed of the air pump, and the output of the encoder is connected to a controller.

[0023] To achieve intelligent control of the air pump, an encoder is set up to detect the air pump speed, providing a hardware basis for the controller to adjust the air pump speed through the air pump drive circuit.

[0024] Furthermore, the controller includes an MCU chip, which is communicatively connected to a display module, and the input terminal of the MCU chip is also connected to a button module.

[0025] The inclusion of a display module and button modules facilitates human-computer interaction.

[0026] The beneficial effects of this utility model through the above technical solution are as follows:

[0027] (1) This utility model achieves rapid degassing. A first three-way solenoid valve, a second three-way solenoid valve, and a first three-way pipe are set up to form a degassing channel. By controlling the opening and closing of the valve ports of the first three-way solenoid valve and the second three-way solenoid valve, the degassing is completed by the air pump. Compared with the original automatic and manual degassing, it solves the problem of slow degassing of multi-chamber airbags, avoids the situation where patients take off or find it inconvenient to wear due to residual gas in the multi-chamber, and also prevents the patient's limbs from being squeezed, causing discomfort or injury.

[0028] (2) This invention achieves rapid inflation. The air pump drive circuit includes a push-pull circuit and a MOS circuit. The input of the push-pull circuit is connected to a controller, which outputs a PWM signal. The two power devices in the push-pull circuit alternately conduct, enhancing the driving capability. The power supply circuit of the air pump is controlled according to the PWM signal, thereby achieving rapid inflation and ensuring the inflation efficiency of the system. Furthermore, this invention allows for the individual inflation of one airbag as needed, significantly increasing the inflation speed of a single airbag compared to the existing method of inflating multiple airbags simultaneously.

[0029] (3) This utility model realizes individual control of each airbag. A two-way valve group is set up, including an upper two-way valve and a lower two-way valve. Multiple upper two-way valves and multiple lower two-way valves are controlled by multiple MOS drive circuits respectively. The gate of the MOS transistor of the MOS drive circuit is connected to the controller, realizing independent control of the air pressure in a single airbag;

[0030] By incorporating a pressure sensor, a hardware foundation is provided to address the issue of multi-chamber airbags having the same pressure, making them unusable for patients with partial limb injuries (especially those who have undergone limb surgery). Attached Figure Description

[0031] Figure 1 This invention relates to the inflation principle of a rapid inflation and deflation system for a multi-chamber airbag with independent pressure control in each chamber.

[0032] Figure 2 This is a diagram illustrating the deflation principle of a rapid inflation and deflation system for a multi-chamber airbag with independent pressure control in each chamber, as described in this utility model.

[0033] Figure 3 This is a schematic diagram of the working principle of a two-way valve group for a rapid inflation and deflation system with independent pressure control for each chamber of a multi-chamber airbag according to this utility model.

[0034] Figure 4 This is one of the electrical schematic diagrams of a rapid inflation / deflation system for a multi-chamber airbag with independent pressure control for each chamber, according to this utility model.

[0035] Figure 5 This is the second electrical schematic diagram of a rapid inflation / deflation system for a multi-chamber airbag with independent pressure control for each chamber, as per this utility model.

[0036] Reference numerals: 1 is air pump, 2 is multi-chamber airbag connector, 3 is airbag, 4 is first three-way solenoid valve, 5 is second three-way solenoid valve, 6 is first three-way pipe, 7 is upper two-way valve, 8 is lower two-way valve, 9 is second three-way pipe, 10 is controller, 11 is air pressure sensor, 12 is air pump drive circuit, 13 is MOS drive circuit, 14 is encoder, 15 is display module, 16 is button module, 17 is first gas distribution pipe, and 18 is second gas distribution pipe. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0038] Example 1

[0039] like Figures 1-5As shown, a rapid inflation / deflation system for a multi-chamber airbag with independent pressure control for each chamber includes an air pump 1. The air pump 1 is equipped with an air supply pipe, which is connected to a multi-chamber airbag connector 2. The multi-chamber airbag connector 2 is connected to multiple airbags 3. The air supply pipe is equipped with a first three-way solenoid valve 4, a second three-way solenoid valve 5, and a first three-way pipe 6. The first three-way solenoid valve 4, the second three-way solenoid valve 5, and the first three-way pipe 6 all include port A, port B, and port C.

[0040] The air outlet of the air pump 1 is connected to port A of the first three-way solenoid valve 4, port B of the first three-way solenoid valve 4 is connected to port B of the first three-way pipe 6, port A of the first three-way pipe 6 is connected to multiple two-way valve groups, port C of the first three-way pipe 6 is connected to port C of the second three-way solenoid valve 5, and port A of the second three-way solenoid valve 5 is connected to the air inlet of the air pump 1.

[0041] The C port of the first three-way solenoid valve 4 and the B port of the second three-way solenoid valve 5 are connected to the outside air.

[0042] The two-way valve group includes an upper two-way valve 7 and a lower two-way valve 8. A second three-way pipe 9 is connected between the upper two-way valve 7 and the lower two-way valve 8. The output end of the second three-way pipe 9 is connected to the airbag 3 through a multi-chamber airbag connector 2.

[0043] The air pump 1, the first three-way solenoid valve 4, the second three-way solenoid valve 5, the multiple upper two-way valves 7 and the multiple lower two-way valves 8 are all equipped with drive circuits, and the drive circuits are connected to the controller 10.

[0044] The two-way valve group also includes a first gas distribution pipe 17 and a second gas distribution pipe 18. The first gas distribution pipe 17 is a pipe structure with one end open and the other end closed. The open side of the first gas distribution pipe 17 is connected to port C of the first three-way solenoid valve 4.

[0045] The second gas distribution pipe 18 is a pipe structure with open ends. Multiple gas pipes are equidistantly arranged on the first gas distribution pipe 17 and the second gas distribution pipe 18. The multiple gas pipes of the first gas distribution pipe 17 are connected to the upper two-way valve 7, and the multiple gas pipes of the second gas distribution pipe 18 are connected to the lower two-way valve 8. A pressure sensor 11 is provided on the first gas distribution pipe 17.

[0046] The output terminal of the air pressure sensor 11 is connected to an AD chip, and the output terminal of the AD chip is connected to the controller 10.

[0047] The driving circuit includes an air pump driving circuit 12, which includes a push-pull circuit and a MOS circuit. The input terminal of the push-pull circuit is connected to the controller 10, and the output terminal of the push-pull circuit is connected to the MOS circuit. The air pump 1 is connected to the power supply through the MOS circuit.

[0048] The driving circuit includes multiple MOS driving circuits 13, and the gate of the MOS transistors of the multiple MOS driving circuits 13 is connected to the controller 10. The first three-way solenoid valve 4, the second three-way solenoid valve 5, the multiple upper two-way valves 7 and the multiple lower two-way valves 8 are all connected to the power supply through the MOS driving circuits 13.

[0049] The air pump 1 is equipped with an encoder 14, which is used to detect the rotational speed of the air pump 1. The output end of the encoder 14 is connected to the controller 10.

[0050] The controller 10 includes an MCU chip, which is communicatively connected to a display module 15. The input terminal of the MCU chip is also connected to a button module 16.

[0051] In this embodiment, the air pump 1 is a DC air pump, model WP36-12, which is equipped with an encoder 14, specifically a Hall encoder; the first three-way solenoid valve 4 and the second three-way solenoid valve 5 are JSF2063-A three-way solenoid valves, the upper two-way valve 7 and the lower two-way valve 8 are ZY040-6B two-way valves, the controller 10 is an STM32F103RC microcontroller, the air pressure sensor 11 is an MPX5100DP pressure sensor, and the display module 15 uses a DMT80600T080_06WT resistive touch screen. Figure 3 (a) shows the inflated state, and (b) shows the deflated state.

[0052] During inflation, an inflation command is issued via the DMT80600T080_06WT resistive touchscreen, and the controller 10 outputs a control signal. At this time, ports A and B of the first three-way solenoid valve 4 and the second three-way solenoid valve 5 are connected. The controller 10, through the MOS drive circuit 13, opens any one of the upper two-way valves 7 and closes all the lower two-way valves 8. The DC air pump 1 (model WP36-12) starts under the action of the air pump drive circuit 12. Air is drawn into the air pump 1 through port B of the second three-way solenoid valve 5 and enters the DC air pump 1 through port A. The DC air pump 1 outputs gas, which flows in through port A of the first three-way solenoid valve 4, flows out through port B, and enters port B of the first three-way pipe 6. At the first three-way pipe 6, gas flows into the first gas distribution pipe 17 through its A port, and then through multiple air pipes equidistantly arranged on the first gas distribution pipe 17, through the opened upper two-way valve 7 and the second three-way pipe 9, and finally enters each airbag 3 through the multi-chamber airbag connector 2 to realize the inflation operation of the airbag 3.

[0053] Meanwhile, the air pressure sensor 11 (MPX5100DP pressure sensor) detects the air pressure in the first gas distribution pipe 17 in real time and transmits the analog signal to the AD chip, which converts it into a digital signal and feeds it back to the controller 10 so that the controller 10 can monitor and adjust the inflation pressure in real time.

[0054] Since only one airbag 3 is inflated at a time, the pressure change in the first gas distribution tube 17 is related to the pressure inside the inflating airbag 3. Therefore, the pressure change in the first gas distribution tube 17 reflects the pressure change inside the airbag 3. When the airbag 3 is fully inflated, the first upper two-way valve 7 closes, and the other upper two-way valve 7 opens, and the pressure change in the first gas distribution tube 17 is again related to the pressure inside the new airbag 3. This achieves pressure detection of the airbag 3. During treatment, all airbags 3 are inflated and deflated sequentially to achieve a cyclical pressure effect.

[0055] There are two types of deflation. The first type is the inflation-deflation cycle during the treatment process. When a single airbag needs to be deflated, the controller 10 opens the lower two-way valve 8 through the MOS drive circuit 13. At this time, the upper two-way valve 7 is closed. Under pressure, the gas is discharged through the first gas distribution pipe 18.

[0056] The second method involves rapid deflation upon completion of treatment. A deflation command is issued via the DMT80600T080_06WT resistive touchscreen, and the controller 10 outputs a control signal. The controller 10, through the MOS drive circuit 13, connects ports A and C of the first three-way solenoid valve 4 and ports A and C of the second three-way solenoid valve 5. All upper two-way valves 7 are open, and the lower two-way valves 8 are closed. Gas from the airbag 3 flows through the multi-chamber airbag connector 2 and the second three-way tube 9, through the open upper two-way valves 7 into the first gas distribution tube 17, then through the first gas distribution tube 17 into port A of the first three-way tube 6, flows out from port C of the first three-way tube 6, enters port C of the second three-way solenoid valve 5, and finally enters the suction port of the air pump 1 from port A of the second three-way solenoid valve 5. Gas output from the air pump 1 is then discharged through port B of the first three-way solenoid valve 4.

[0057] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber, comprising an air pump (1), wherein the air pump (1) is provided with an air supply pipe, the air supply pipe is connected to a multi-chamber airbag connector (2), and the multi-chamber airbag connector (2) is connected to multiple airbags (3), characterized in that, The gas pipeline is equipped with a first three-way solenoid valve (4), a second three-way solenoid valve (5), and a first three-way pipe (6). The first three-way solenoid valve (4), the second three-way solenoid valve (5), and the first three-way pipe (6) all include port A, port B, and port C. The air outlet of the air pump (1) is connected to the A port of the first three-way solenoid valve (4), the B port of the first three-way solenoid valve (4) is connected to the B port of the first three-way pipe (6), the A port of the first three-way pipe (6) is connected to multiple two-way valve groups, the C port of the first three-way pipe (6) is connected to the C port of the second three-way solenoid valve (5), and the A port of the second three-way solenoid valve (5) is connected to the air inlet of the air pump (1). The C port of the first three-way solenoid valve (4) and the B port of the second three-way solenoid valve (5) are connected to the outside air. The two-way valve group includes an upper two-way valve (7) and a lower two-way valve (8). A second three-way pipe (9) is connected between the upper two-way valve (7) and the lower two-way valve (8). The output end of the second three-way pipe (9) is connected to the airbag (3) through a multi-chamber airbag connector (2). The air pump (1), the first three-way solenoid valve (4), the second three-way solenoid valve (5), the multiple upper two-way valves (7) and the multiple lower two-way valves (8) are all equipped with drive circuits, and the drive circuits are connected to a controller (10).

2. The rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber according to claim 1, characterized in that, The two-way valve group also includes a first gas distribution pipe (17) and a second gas distribution pipe (18). The first gas distribution pipe (17) is a pipe structure with one end open and the other end closed. The open side of the first gas distribution pipe (17) is connected to the C port of the first three-way solenoid valve (4). The second gas distribution pipe (18) is a pipe structure with open ends. Multiple gas pipes are equidistantly arranged on the first gas distribution pipe (17) and the second gas distribution pipe (18). The multiple gas pipes of the first gas distribution pipe (17) are connected to the upper two-way valve (7), and the multiple gas pipes of the second gas distribution pipe (18) are connected to the lower two-way valve (8). A pressure sensor (11) is provided on the first gas distribution pipe (17). The output terminal of the air pressure sensor (11) is connected to an AD chip, and the output terminal of the AD chip is connected to a controller (10).

3. The rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber according to claim 1, characterized in that, The driving circuit includes an air pump driving circuit (12), which includes a push-pull circuit and a MOS circuit. The input of the push-pull circuit is connected to the controller (10), and the output of the push-pull circuit is connected to the MOS circuit. The air pump (1) is connected to the power supply through the MOS circuit.

4. The rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber according to claim 1, characterized in that, The driving circuit includes multiple MOS driving circuits (13), the gate of the MOS transistors of the multiple MOS driving circuits (13) is connected to the controller (10), and the first three-way solenoid valve (4), the second three-way solenoid valve (5), the multiple upper two-way valves (7) and the multiple lower two-way valves (8) are all connected to the power supply through the MOS driving circuit (13).

5. The rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber according to claim 1, characterized in that, The air pump (1) is equipped with an encoder (14), which is used to detect the rotation speed of the air pump (1). The output end of the encoder (14) is connected to the controller (10).

6. The rapid inflation / deflation system for a multi-chamber airbag with independently controlled air pressure in each chamber according to claim 1, characterized in that, The controller (10) includes an MCU chip, which is communicatively connected to a display module (15), and the input terminal of the MCU chip is also connected to a button module (16).

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