An air circuit control system for a pneumatic cardiopulmonary resuscitation compression device

Abstract

The present invention discloses an air circuit control system for a pneumatic cardiopulmonary resuscitation pressing device, which includes an air-controlled valve connected to a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device, wherein the valve core of the air-controlled valve controls the inflation into the piston cylinder or the discharge of the gas in the piston cylinder when the valve core moves back and forth; at least one end of the valve core of the air-controlled valve is provided with an air cavity, and the air cavity is connected to an air source through a micro-electrically controlled valve, and the micro-electrically controlled valve controls the inflation into the air cavity or the discharge of the gas in the air cavity to drive the valve core of the air-controlled valve to move back and forth. The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention can greatly reduce the power consumption of the electro-pneumatic pressing device, solves the problem of insufficient power that plagues the electro-pneumatic pressing device in clinical use, and makes "precision pressing" truly popularized and promoted in clinical practice.

Description

Technical Field

[0001] The present invention relates to the technical field of cardiopulmonary resuscitation devices, and in particular to an air circuit control system of a pneumatic cardiopulmonary resuscitation pressing device. Background Art

[0002] The cardiopulmonary resuscitation compression device is one of the most commonly used and important equipment for medical emergency. Cardiopulmonary resuscitation compression devices can be divided into two categories: pneumatic and electric according to the different power sources. Pneumatic compression devices are relatively mature, and their clinical effects are generally recognized. They are the preferred type of in-hospital emergency treatment. Pneumatic compression devices can be further divided into air-controlled pneumatic compression devices and electro-controlled pneumatic compression devices according to the control method. The advantage of air-controlled pneumatic compression devices is that they can be used as long as there is an air source and are simple to operate; the disadvantage is that the compression frequency and duty cycle are not stable enough, which is affected by both temperature and air source cleanliness, and it is difficult to achieve multiple compression modes; basically, it is difficult to have greater development. Electro-pneumatic is a new method developed in recent years. It can ensure the stability and adjustable compression frequency and duty cycle, and can achieve multiple compression modes.

[0003] The electric-controlled pneumatic pressing device requires a power source. Considering the characteristics of clinical use, the cardiopulmonary resuscitation pressing device must use a battery as a power source. Since the cylinder is required to be inflated and deflated quickly during the pressing process, a large-flow electric-controlled valve must be selected, and a large-flow electric-controlled valve usually requires a power of more than 3W. In the entire pressing device, only the control circuit consumes power except the electric-controlled valve, and the control circuit can currently achieve very low power consumption. Therefore, the main power consumption in the electric-controlled pneumatic pressing device lies in the large-flow electric-controlled valve. And the voltage of the large-flow electric-controlled valve is usually above 12V, which also increases the complexity of the circuit. It is precisely because the control and execution devices of the current electric-controlled pneumatic pressing devices directly use large-flow electric-controlled valves, and the power consumption of these electric-controlled valves is relatively large. The power of ordinary dry batteries is difficult to meet the requirements, so large-capacity lithium batteries must be selected, but the large capacity of lithium batteries will increase the volume and weight, which further limits clinical applications. In addition, lithium batteries also have the problem of self-discharge, which is unacceptable for a compression device in a clinical standby state. Therefore, the electric-controlled pneumatic compression device is greatly restricted in practical application due to its relatively large power consumption. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the existing electric-controlled pneumatic cardiopulmonary resuscitation pressing device, and further provide an air circuit control system of a pneumatic cardiopulmonary resuscitation pressing device that can greatly save electricity.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A pneumatic control system for a pneumatic cardiopulmonary resuscitation pressing device, characterized in that it includes an air-controlled valve connected to a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device, wherein the valve core of the air-controlled valve controls the inflation into the piston cylinder or the discharge of gas in the piston cylinder when the valve core moves back and forth; at least one end of the valve core of the air-controlled valve is provided with an air cavity, and the air cavity is connected to an air source via a micro-electrically controlled valve, and the micro-electrically controlled valve controls the inflation into the air cavity or the discharge of gas in the air cavity to drive the valve core of the air-controlled valve to move back and forth.

[0007] Preferably, the air-controlled valve is a single-way two-way air-controlled valve, and the first air cavity and the second air cavity are respectively provided at both ends of the valve core of the air-controlled valve, and the air-controlled valve air inlet, the air-controlled valve exhaust port and the air-controlled valve air supply port are provided on the body of the air-controlled valve, the air-controlled valve air inlet is connected with the air source, the air-controlled valve exhaust port is connected with the atmosphere, and the air-controlled valve air supply port is connected with the air path interface of the piston cylinder, and when the valve core of the air-controlled valve moves back and forth, the air-controlled valve air supply port is connected with the air-controlled valve air inlet or the air-controlled valve exhaust port; two electric-controlled valve air supply ports are provided on the micro-electrically controlled valve, and the two electric-controlled valve air supply ports are respectively connected with the first air cavity and the second air cavity, and when the valve core of the micro-electrically controlled valve moves back and forth, the first air cavity and the second air cavity are alternately inflated and deflated to push the valve core of the air-controlled valve to move back and forth.

[0008] Preferably, the two air supply ports of the electric-controlled valves are respectively the first air supply port and the second air supply port, the first air supply port is connected to the first air cavity, and the second air supply port is connected to the second air cavity; the valve body of the micro-electrically controlled valve is also provided with a first air inlet, a first exhaust port, a second air inlet, and a second exhaust port, the first air inlet and the second air inlet are respectively connected to an air source, the first exhaust port and the second exhaust port are respectively connected to the atmosphere, when the valve core of the micro-electrically controlled valve moves reciprocatingly, the first air inlet is connected to the first air supply port, the second exhaust port is connected to the second air supply port, or the first exhaust port is connected to the first air supply port, the second air inlet is connected to the second air supply port.

[0009] Preferably, one end of the micro electric control valve is connected to a controller, and the controller drives the valve core of the micro electric control valve to move toward an end away from the controller; a return spring is provided at the other end of the micro electric control valve, and the return spring resists the valve core of the micro electric control valve to return to the end where the controller is located.

[0010] Preferably, the air cavity is provided at one end of the valve core of the air-controlled valve, and an air-controlled valve core reset spring is provided at the other end of the valve core of the air-controlled valve, and the air-controlled valve core reset spring resists the air-controlled valve core to reset toward the air cavity.

[0011] Preferably, the micro-electrically controlled valve is provided with an electric-controlled valve air supply port, an electric-controlled valve air inlet port, and an electric-controlled valve exhaust port, the electric-controlled valve air supply port is connected to the air cavity, the electric-controlled valve air inlet port is connected to the air source, and the electric-controlled valve exhaust port is connected to the atmosphere; when the valve core of the micro-electrically controlled valve moves back and forth, the electric-controlled valve air supply port is connected to the electric-controlled valve air inlet port or the electric-controlled valve exhaust port; one end of the micro-electrically controlled valve is connected to a controller, and the other end of the micro-electrically controlled valve is provided with a reset spring, the controller drives the valve core of the micro-electrically controlled valve to move to a side away from the controller, and the reset spring drives the valve core of the micro-electrically controlled valve to move to a side of the controller.

[0012] Beneficial effects of the present invention:

[0013] The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention greatly reduces the power consumption of the electric-controlled pneumatic pressing device, solves the problem of insufficient power that plagues the electric-controlled pneumatic pressing device in clinical use, and enables "precision pressing" to be truly popularized and promoted in clinical practice, thereby saving the lives of more critically ill patients, with enormous economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings, wherein:

[0015] Figure 1 It is a schematic diagram of the air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention;

[0016] Figure 2 1 is a schematic structural diagram of a first embodiment of an air circuit control system of a pneumatic cardiopulmonary resuscitation pressing device of the present invention;

[0017] Figure 3 1 is a schematic diagram of the structure of the second embodiment of the air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention.

[0018] The reference numerals in the figure are as follows:

[0019] 1-pressing head; 2-piston cylinder; 3-air-controlled valve; 31-first air cavity; 32-second air cavity; 33-air-controlled valve air inlet; 34-air-controlled valve exhaust; 35-air-controlled valve air supply; 36-air cavity; 37-air-controlled valve core return spring; 4-micro electric-controlled valve; 41-first air supply; 42-second air supply; 43-first air inlet; 44-first exhaust; 45-second air inlet; 46-second exhaust; 47-return spring; 401-electric-controlled valve air supply; 402-electric-controlled valve air inlet; 403-electromagnetic valve exhaust; 5-air source; 6-controller. DETAILED DESCRIPTION

[0020] The arrows in the figure indicate the direction of airflow. Figure 1 The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention includes an air-controlled valve 3 connected to the piston cylinder 2 of the pneumatic cardiopulmonary resuscitation pressing device, and the ejection end of the piston cylinder 2 is connected to a pressing head 1. When the valve core of the air-controlled valve 3 moves back and forth (it can be reciprocating movement in the left and right, up and down directions according to the setting direction of the air-controlled valve), it controls the inflation into the piston cylinder 2 or the discharge of the gas in the piston cylinder 2; at least one end of the valve core of the air-controlled valve 1 is provided with an air cavity, and the air cavity is connected to an air source 5 through a micro-electrically controlled valve 4. The micro-electrically controlled valve 4 controls the inflation into the air cavity or the discharge of the gas in the air cavity to drive the valve core of the air-controlled valve 3 to move back and forth, and then the piston cylinder is inflated or the gas in the piston cylinder is discharged to perform cardiopulmonary resuscitation pressing action.

[0021] The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention adopts a two-stage air valve connection control structure to replace the large-flow electric control valve, that is, the reciprocating movement of the valve core of the air control valve is controlled by a micro electric control valve, thereby realizing the filling of the piston cylinder or the discharge of the gas in the piston cylinder to perform cardiopulmonary resuscitation pressing action. As long as the power on / off of the micro electric control valve is controlled, the rapid filling / deflation of the piston cylinder can be controlled to achieve the pressing requirement. The piston cylinder is driven and controlled by the large-flow air control valve, and the movement of the valve core of the large-flow air control valve is controlled by the micro electric control valve. Since the power consumption of the micro-electrically controlled valve is very low and can be basically controlled below 0.3W, and the voltage can be within 6V, and the large-flow gas-controlled valve does not need to consume electricity, it can greatly save electricity. The electric-controlled pneumatic pressing device using the air circuit control system of the present invention has a driving power consumption of only less than 10% of that of the traditional electric-controlled pneumatic cardiopulmonary resuscitation device, and the total power consumption (including the control circuit) is about 15% of the original, which can save a lot of electricity and reduce the size and weight of the entire electric-controlled pneumatic cardiopulmonary resuscitation device.

[0022] The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention greatly reduces the power consumption of the electric-controlled pneumatic pressing device, solves the problem of battery power supply that plagues the clinical use of the electric-controlled pneumatic pressing device, and enables "precision pressing" to be truly popularized and promoted in clinical practice, thereby saving the lives of more critically ill patients, with great economic and social benefits. The specific forms of the micro-electrically controlled valves and air-controlled valves used in the air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device of the present invention are not limited, as long as the cardiopulmonary resuscitation pressing action of the two-stage linkage control piston cylinder can be realized. The present invention will further illustrate the principle of the two-stage linkage control of the piston cylinder action of the present invention in conjunction with the following two specific embodiments.

[0023] Embodiment 1

[0024] See also Figure 2 The air-controlled valve 3 is a single-way two-way air-controlled valve. The first air cavity 31 and the second air cavity 32 are respectively provided at both ends of the valve core of the air-controlled valve. The air-controlled valve body is provided with an air-controlled valve air inlet 33, an air-controlled valve exhaust port 34, and an air-controlled valve air supply port 35. The air-controlled valve air inlet 33 is connected to the air source 5, the air-controlled valve exhaust port 34 is connected to the atmosphere, and the air-controlled valve air supply port 35 is connected to the air path interface of the piston cylinder 2. The valve core of the air-controlled valve 3 moves back and forth ( Figure 2 When the micro-electrically controlled valve 4 moves left and right), the air-controlled valve air supply port 35 is connected with the air-controlled valve air inlet port 33 or the air-controlled valve exhaust port 34 to alternately inflate and deflate the piston cylinder; the micro-electrically controlled valve 4 is provided with two electric-controlled valve air supply ports, which are respectively connected with the first air cavity 31 and the second air cavity 32. When the valve core of the micro-electrically controlled valve 4 moves back and forth, the first air cavity 31 and the second air cavity 32 are alternately inflated and deflated to push the valve core of the micro-electrically controlled valve 4 to move back and forth so that the air-controlled valve air supply port 35 is connected with the air-controlled valve air inlet port 33 or the air-controlled valve exhaust port 34.

[0025] In this embodiment, the two air supply ports of the electric control valve are respectively a first air supply port 41 and a second air supply port 42, the first air supply port 41 is connected to the first air cavity 31, and the second air supply port 42 is connected to the second air cavity 32; the valve body of the micro electric control valve 4 is also provided with a first air inlet 43, a first exhaust port 44, a second air inlet 45, and a second exhaust port 46, the first air inlet 43 and the second air inlet 45 are respectively connected to the air source 5 (the micro electric control valve 4 can share the air source with the air control valve 3 or be connected to different air sources), the first exhaust port 44 and the second exhaust port 46 are respectively connected to the atmosphere, and when the valve core of the micro electric control valve 4 moves back and forth ( Figure 2 The first air inlet 43 is connected to the first air supply port 41, and the second air outlet 46 is connected to the second air supply port 42. At this time, the first air outlet 44 and the second air inlet 45 are both in a non-conducting state. When the first air supply port 41 inflates the first air cavity through the pipeline and pushes the valve core of the air control valve 3 to move to the right, at the same time, the gas in the second air cavity 32 is discharged into the air through the second air supply port 42 and the second air outlet 46 to provide the valve core of the air control valve 3 with a movement to the right. Provide travel space; when the first exhaust port 44 is connected with the first air supply port 41 and the second air inlet 45 is connected with the second air supply port 42, the gas entering from the air source 5 enters the second air cavity 32 through the second air inlet 45 and the second air supply port 42. After entering the second air cavity, the gas pushes the valve core of the air-controlled valve to move to the left. At this time, the gas in the first air cavity 31 is discharged into the atmosphere through the first air supply port 41 and the first exhaust port 44, so as to leave travel space for the valve core of the air-controlled valve 3 to move to the left.

[0026] See also Figure 2 In this embodiment, the right end of the micro-electrically controlled valve 4 is connected to the controller 6, and the controller 6 drives the valve core of the micro-electrically controlled valve 4 to move toward the end away from the controller 6 ( Figure 2 The other end of the micro-electrically controlled valve 4 ( Figure 2 The left end of the micro-electric control valve is provided with a return spring 47, and the return spring 47 resists the valve core of the micro-electric control valve to move toward the end where the controller 6 is located ( Figure 2 That is, after the controller receives the execution signal, it drives the valve core of the micro-electric control valve to Figure 2 The left end of the piston moves, and the return spring 47 is compressed to store energy, and the piston cylinder moves downward with the pressing head to complete the pressing action; when the controller releases the drive to the micro-electric control valve core, the micro-electric control valve core is bounced to the right under the action of the return spring 47, and the gas in the piston cylinder is released. Under the action of the elastic force of the chest cavity, the pressing head drives the piston cylinder to rebound upward. In this way, as long as the power on / off of the micro-electric control valve is controlled, the rapid filling / deflation of the cylinder can be controlled, thereby achieving the pressing requirement.

[0027] Embodiment 2

[0028] See also Figure 3 As another embodiment of the present invention, the right end of the valve core of the air-controlled valve 3 is provided with the air cavity 36, and the left end of the valve core of the air-controlled valve 3 is provided with an air-controlled valve core reset spring 37, and the air-controlled valve core reset spring 37 resists the valve core of the air-controlled valve 3 to reset to the side of the air cavity 36. The micro-electrically controlled valve 4 is provided with an electric-controlled valve air supply port 401, an electric-controlled valve air inlet 402, and an electric-controlled valve exhaust port 403. The electric-controlled valve air supply port 401 is connected to the air cavity 36, the electric-controlled valve air inlet 402 is connected to the air source 5, and the electric-controlled valve exhaust port 403 is connected to the atmosphere; when the valve core of the micro-electrically controlled valve 4 reciprocates, the electric-controlled valve air supply port 401 is connected to the electric-controlled valve air inlet 402 or the electric-controlled valve exhaust port 403; the right end of the micro-electrically controlled valve 4 is connected to the controller 6, and the left end of the micro-electrically controlled valve 4 is provided with a return spring 47, and the controller 6 drives the valve core of the micro-electrically controlled valve 4 to the side away from the controller ( Figure 3 The return spring 47 drives the valve core of the micro-electric control valve to move to one side (the left side) of the controller 6. Figure 3 right) move.

[0029] When the controller 6 brakes and drives the valve core of the micro solenoid valve to move to the left, the reset spring 47 is compressed and stores energy, and the gas enters the air cavity 36 through the electric control valve air inlet 402 and the electric control valve air supply port 401. The air cavity 36 is filled with gas and pushes the valve core of the air control valve 3 to move to the left. At this time, the gas in the air source 5 enters the piston cylinder through the air control valve air inlet 33 and the air control valve air supply port 35, and pushes the cylinder to move downward, thereby driving the pressing head to press down to complete the pressing action; when the controller releases the valve core of the micro electric control valve, the reset spring 47 drives the valve core of the micro electric control valve to move to the right, and the gas in the air cavity 36 is discharged through the electric control valve air supply port and the electric control valve exhaust port to provide travel space for the valve core of the air control valve to move to the right. The air control valve core reset spring releases energy and pushes the air control valve core to move to the right, and the gas in the piston cylinder is discharged through the air control valve air supply port and the air control valve exhaust port. The pressing head and the piston complete the rebound action under the action of the chest elastic force.

[0030] The micro-electrically controlled valve of this embodiment only needs to control one air chamber on the air-controlled valve, so the structure of the selected micro-electrically controlled valve is relatively simple, and its valve body only needs a single-way two-way (or equivalent structure). When the electromagnetic coil is not energized, the reset spring pushes the valve core in the valve body to move to the right, so that the air chamber of the large-flow air-controlled valve is emptied, and the cylinder is also emptied. When the electromagnetic coil is energized, it will push the valve core in the valve body to move to the left to overcome the spring force, so that the air chamber of the large-flow air-controlled valve is inflated, and the cylinder is also inflated. In this way, as long as the power on / off of the micro-electromagnetic valve is controlled, the rapid filling / deflation of the cylinder can be controlled, thereby achieving the pressing requirement.

[0031] The above specific implementation methods are only detailed explanations of the technical solutions of the present invention. The present invention is not limited to the above embodiments. Those skilled in the art should understand that any improvements and substitutions based on the above principles and spirits on the basis of the present invention should be within the protection scope of the present invention.

Claims

1. An air circuit control system for a pneumatic cardiopulmonary resuscitation pressing device, characterized in that: A pneumatic control valve is included which is connected to the piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device. When the valve core of the pneumatic control valve moves back and forth, the valve core controls the inflation into the piston cylinder or the discharge of the gas in the piston cylinder. The pneumatic control valve is a single-way two-way pneumatic control valve. The main body of the pneumatic control valve is provided with an air control valve air inlet, an air control valve exhaust port, and an air control valve air supply port. The air control valve air inlet is connected to an air source, the air control valve exhaust port is connected to the atmosphere, and the air control valve air supply port is connected to the air path interface of the piston cylinder. When the valve core of the pneumatic control valve moves back and forth, the air control valve air supply port is connected to the air control valve air inlet or the air control valve exhaust port. The first air cavity and the second air cavity are respectively provided at both ends of the valve core of the air-controlled valve, the first air cavity and the second air cavity are connected to the air source through a micro-electrically controlled valve, the micro-electrically controlled valve is provided with two electric-controlled valve air supply ports, the two electric-controlled valve air supply ports are respectively a first air supply port and a second air supply port, the first air supply port is connected to the first air cavity, the second air supply port is connected to the second air cavity, when the valve core of the micro-electrically controlled valve reciprocates, the first air cavity and the second air cavity are alternately inflated and deflated to push the valve core of the air-controlled valve to reciprocate; The valve body of the micro-electrically controlled valve is also provided with a first air inlet, a first exhaust port, a second air inlet and a second exhaust port. The first air inlet and the second air inlet are connected to an air source respectively, and the first exhaust port and the second exhaust port are connected to the atmosphere respectively. When the valve core of the micro-electrically controlled valve moves back and forth, the first air inlet is connected to the first air supply port, the second exhaust port is connected to the second air supply port, or the first exhaust port is connected to the first air supply port, and the second air inlet is connected to the second air supply port.

2. The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 1, characterized in that: One end of the micro-electrically controlled valve is connected to a controller, and the controller drives the valve core of the micro-electrically controlled valve to move toward an end away from the controller; the other end of the micro-electrically controlled valve is provided with a return spring, and the return spring resists the valve core of the micro-electrically controlled valve to return to the end where the controller is located.

3. The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 1, characterized in that: The air cavity is arranged at one end of the valve core of the air-controlled valve, and an air-controlled valve core return spring is arranged at the other end of the valve core of the air-controlled valve. The air-controlled valve core return spring contacts the air-controlled valve core to return to the air cavity.

4. The air circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 3, characterized in that: The micro-electrically controlled valve is provided with an electric-controlled valve air supply port, an electric-controlled valve air inlet port, and an electric-controlled valve exhaust port, the electric-controlled valve air supply port is connected with the air cavity, the electric-controlled valve air inlet port is connected with the air source, and the electric-controlled valve exhaust port is connected with the atmosphere; when the valve core of the micro-electrically controlled valve moves back and forth, the electric-controlled valve air supply port is connected with the electric-controlled valve air inlet port or the electric-controlled valve exhaust port; one end of the micro-electrically controlled valve is connected with a controller, and the other end of the micro-electrically controlled valve is provided with a reset spring, the controller drives the valve core of the micro-electrically controlled valve to move to a side away from the controller, and the reset spring drives the valve core of the micro-electrically controlled valve to move to a side of the controller.

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