US-12616638-B2 - Gas circuit control system of pneumatic cardiopulmonary resuscitation pressing device

US12616638B2US 12616638 B2US12616638 B2US 12616638B2US-12616638-B2

Abstract

A gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device, including a gas control valve communicating with a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device, wherein a spool of the gas control valve controls gas charging and discharging of the piston cylinder when reciprocating; and at least one end of the spool of the gas control valve is provided with a gas cavity, the gas cavity communicates with a gas source through a miniature electronic control valve, and the miniature electronic control valve controls gas charging and discharging of the gas cavity to drive the spool of the gas control valve to reciprocate.

Inventors

Weifang Kong
Eric Zhang
Zhiqing Fang
Yueming Yan
Zhiping FANG

Assignees

SUNLIFE SCIENCE (SUZHOU) INC.

Dates

Publication Date: 20260505
Application Date: 20201016
Priority Date: 20191017

Claims (6)

1 . A gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device, comprising: a gas control valve communicating with a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device, wherein a spool of the gas control valve controls gas charging and discharging of the piston cylinder when reciprocating, at least one end of the spool of the gas control valve is provided with a gas cavity, the gas cavity communicates with a gas source through a miniature electronic control valve, and the miniature electronic control valve controls gas charging and discharging of the gas cavity to drive the spool of the gas control valve to reciprocate, wherein the gas control valve is a single-way double-port gas control valve, two ends of the spool of the gas control valve are respectively provided with a first gas cavity and a second gas cavity, and a body of the gas control valve is provided with a gas control valve gas inlet, a gas control valve gas outlet and a gas control valve gas supply port: the gas control valve gas inlet communicates with the gas source, the gas control valve gas outlet communicates with an atmosphere, and the gas control valve gas supply port communicates with a gas circuit interface of the piston cylinder: the gas control valve gas supply port communicates with the gas control valve gas inlet or the gas control valve gas outlet when the spool of the gas control valve reciprocates; and the miniature electronic control valve is provided with two electronic control valve gas supply ports which respectively communicate with the first gas cavity and the second gas cavity, and the first gas cavity and the second gas cavity are subjected to gas charging and discharging alternately when a spool of the miniature electronic control valve reciprocates, so as to push the spool of the gas control valve to reciprocate.
2 . The gas circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 1 , wherein the two electronic control valve gas supply ports are a first gas supply port and a second gas supply port, the first gas supply port communicates with the first gas cavity, and the second gas supply port communicates with the second gas cavity; a valve body of the miniature electronic control valve is provided with a first gas inlet, a first gas outlet, a second gas inlet and a second gas outlet, the first gas inlet and the second gas inlet communicate with the gas source respectively, and the first gas outlet and the second gas outlet communicate with the atmosphere respectively; and when the spool of the miniature electronic control valve reciprocates, the first gas inlet communicates with the first gas supply port, the second gas outlet communicates with the second gas supply port, or the first gas outlet communicates with the first gas supply port, and the second gas inlet communicates with the second gas supply port.
3 . The gas circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 1 , wherein one end of the miniature electronic control valve is connected to a controller, and the controller drives the spool of the miniature electronic control valve to move to an end away from the controller; and the other end of the miniature electronic control valve is provided with a returning spring, and the returning spring abuts against the spool of the miniature electronic control valve returning to an end where the controller is located.
4 . The gas circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 1 , wherein one end of the spool of the gas control valve is provided with the gas cavity, and the other end of the spool of the gas control valve is provided with a gas control spool returning spring which abuts against the spool of the gas control valve returning to a side where the gas cavity is located.
5 . The gas circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 4 , wherein the miniature electronic control valve is provided with an electronic control valve gas supply port, an electronic control valve gas inlet and an electronic control valve gas outlet, the electronic control valve gas supply port communicates with the gas cavity, the electronic control valve gas inlet communicates with the gas source, and the electronic control valve gas outlet communicates with the atmosphere; when a spool of the miniature electronic control valve reciprocates, the electronic control valve gas supply port communicates with the electronic control valve gas inlet or the electronic control valve gas outlet; one end of the miniature electronic control valve is connected to a controller, and the other end of the miniature electronic control valve is provided with a returning spring; and the controller drives the spool of the miniature electronic control valve to move to a side away from the controller, and the returning spring drives the spool of the miniature electronic control valve to move to a side where the controller is located.
6 . The gas circuit control system of the pneumatic cardiopulmonary resuscitation pressing device according to claim 2 , wherein one end of the miniature electronic control valve is connected to a controller, and the controller drives the spool of the miniature electronic control valve to move to an end away from the controller; and the other end of the miniature electronic control valve is provided with a returning spring, and the returning spring abuts against the spool of the miniature electronic control valve returning to an end where the controller is located.

Description

FIELD OF THE PRESENT DISCLOSURE The invention relates to the technical field of cardiopulmonary resuscitation devices, in particular to a gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device. BACKGROUND OF THE PRESENT DISCLOSURE Cardiopulmonary resuscitation pressing devices are one of the most commonly used and most important devices for emergency medical aid. Cardiopulmonary resuscitation pressing devices are divided into a pneumatic type and an electric type according to power sources. The pneumatic pressing devices are well-developed, have a generally recognized clinical effect, and are preferred in the case of first aid in the hospital. The pneumatic pressing devices can be subdivided into gas control pneumatic pressing devices and electronic control pneumatic pressing devices according to control modes. The gas control pneumatic pressing devices have the advantages that they can be used as long as a gas source is available, and operation is easy. The disadvantages of gas control pneumatic pressing devices are that the compression rate and duty cycle are not stable enough, which may be affected by both temperature and the cleaning of the gas source, and it is hard to realize multiple pressing modes, so further development is basically difficult. The electronic control pneumatic pressing devices have been developed in recent years, which can ensure the stability and adjustability of the compression rate and duty cycle, and can realize various pressing modes. The electronic control pneumatic pressing device needs a power supply. Considering the characteristics of clinical use, the cardiopulmonary resuscitation pressing device must use a battery as the power supply. Because gas charging and discharging need to be performed on a cylinder quickly in the pressing process, a large-flow electronic control valve is required, which usually requires a power of more than 3 W. In a pressing device, besides the electronic control valve, only a control circuit consumes power, and the control circuit is now capable of very low power consumption. Therefore, the power consumption in the electronic control pneumatic presser is mainly caused by the large-flow electronic control valve. The voltage of the large-flow electronic control valve is usually above 12 V, which also increases the complexity of a circuit. At present, large-flow electronic control valves are directly adopted by control actuators of the electronic control pneumatic pressing devices, which require great power that ordinary dry batteries cannot provide and only large-capacity lithium batteries can provide. However, the large capacity of lithium batteries will lead to greater volume and weight, which further limits clinical application. In addition, the lithium batteries have a self-discharge problem, which is unacceptable for the pressing device in a clinical standby state. Therefore, the practical application of the electronic control pneumatic pressing devices is greatly limited due to large power consumption. SUMMARY OF THE PRESENT DISCLOSURE Therefore, the technical problem to be solved by the invention is to overcome the above shortcomings of existing electronic control pneumatic cardiopulmonary resuscitation pressing devices by providing a gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device which can greatly save electricity. In order to achieve the above purpose, the invention adopts the following technical scheme. A gas circuit control system of a pneumatic cardiopulmonary resuscitation pressing device comprises a gas control valve communicating with a piston cylinder of the pneumatic cardiopulmonary resuscitation pressing device, wherein a spool of the gas control valve controls gas charging and discharging of the piston cylinder when reciprocating, at least one end of the spool of the gas control valve is provided with a gas cavity, the gas cavity communicates with a gas source through a miniature electronic control valve, and the miniature electronic control valve controls gas charging and discharging of the gas cavity to drive the spool of the gas control valve to reciprocate. Preferably, the gas control valve is a single-way double-port gas control valve, two ends of the spool of the gas control valve are respectively provided with a first gas cavity and a second gas cavity, and a body of the gas control valve is provided with a gas control valve gas inlet, a gas control valve gas outlet and a gas control valve gas supply port; the gas control valve gas inlet communicates with a gas source, the gas control valve gas outlet communicates with the atmosphere, and the gas control valve gas supply port communicates with a gas circuit interface of the piston cylinder; the gas control valve gas supply port communicates with the gas control valve gas inlet or the gas control valve gas outlet when the spool of the gas control valve reciprocates; and the miniature electronic contro