WO2016086445A1

WO2016086445A1 - Breathing equipment and oxygen concentration detection mechanism thereof

Info

Publication number: WO2016086445A1
Application number: PCT/CN2014/093662
Authority: WO
Inventors: 李增; 沈良钢; 谈恒
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2014-12-03
Filing date: 2014-12-12
Publication date: 2016-06-09
Also published as: CN105709318B; CN105709318A

Abstract

Disclosed are breathing equipment (10) and an oxygen concentration detection mechanism thereof. The above-mentioned oxygen concentration detection mechanism is used for detecting the oxygen concentration of gas output from a main device. The oxygen concentration detection mechanism comprises a gating switch (220), a volume cavity body (240), a switch valve (260) and a oxygen sensor (280). Two gas inlets (222) of the gating switch (220) are respectively in communication with an oxygen channel (140) and an air channel (160). The volume cavity body (240) is in communication with an air outlet (224), the external atmosphere, and a gas mixture channel (180). The switch valve (260) is located between the volume cavity body (240) and the gas mixture channel (180), and between the air outlet (224) and the volume cavity body (240). The oxygen sensor (280) is connected to the volume cavity body (240). The oxygen sensor (280) is used for detecting the oxygen concentration of a gas inside the volume cavity body (240). The oxygen concentration detection mechanism is parallel on the main device. Oxygen or air is introduced into the volume cavity body (240) by the gating switch (220), and then the oxygen sensor (280) is calibrated. The calibration process can be performed when the main device is normally working, and improves the accuracy of the oxygen sensor (280).

Description

Breathing device and oxygen concentration detecting mechanism thereof

[Technical Field]

The present invention relates to the technical field of medical devices, and in particular to a breathing apparatus and an oxygen concentration detecting mechanism thereof.

【Background technique】

In the application of medical breathing apparatus such as ventilators and anesthesia machines, the patient must be mechanically ventilated. For patients undergoing treatment, the control of oxygen concentration is very important, especially for infants and critically ill patients. Therefore, monitoring and calibration of oxygen concentration is necessary.

The general ventilator and anesthesia machine use the oxygen sensor to monitor the concentration of the mixed gas. The oxygen sensor needs to be calibrated frequently to ensure its accuracy. When calibrating the oxygen sensor, the machine needs to be in the standby state. First, oxygen is introduced, and then the air is introduced to perform oxygen sensor calibration, which affects the normal operation of the machine.

[Summary of the Invention]

Based on this, it is necessary to provide a breathing apparatus and an oxygen concentration detecting mechanism thereof for the problem that the oxygen sensor cannot be calibrated while the breathing apparatus is operating.

An oxygen concentration detecting mechanism for detecting an oxygen concentration of a main device output gas, the main device comprising an air oxygen mixer, and the main device is provided with an oxygen passage, an air passage and a mixed gas passage, the oxygen passage and The air passages are respectively communicated with two intake ends of the air oxygen mixer, and the mixed gas passage is in communication with an air outlet end of the air oxygen mixer;

The oxygen concentration detecting mechanism includes an air oxygen gate switch, a cavity body, an on-off valve and an oxygen sensor;

The air oxygen gate switch is provided with two air inlets, and the two air inlets are respectively connected with the oxygen passage and the air passage; the air oxygen gate switch is further provided with an air outlet, The air oxygen gate switch is capable of controlling the outlet port to selectively communicate with or close one of the air inlets;

The cavity is in communication with the air outlet, the cavity is in communication with an external atmosphere, and the cavity is in communication with the mixed gas passage;

The switching valve is located between the cavity and the mixed gas passage, and between the air outlet and the cavity;

The oxygen sensor is coupled to the cavity, and the oxygen sensor is configured to detect an oxygen concentration of a gas in the cavity.

In one embodiment, the switching valve is a pneumatic switching valve;

When the gas passes through the passage between the air outlet and the cavity, the gas drives the pneumatic on-off valve to isolate the cavity from the mixed gas passage;

The pneumatic switching valve opens when gas does not pass through the passage between the air outlet and the cavity, and the cavity is in communication with the mixed gas passage.

In one embodiment, the number of the on-off valves is two, and the two of the on-off valves are respectively located between the cavity and the mixed gas passage, and the air outlet and the cavity between.

In one embodiment, the method further includes a sequence valve, wherein the cavity body communicates with the air outlet through the sequence valve, and the cavity body communicates with the external atmosphere through the sequence valve;

The sequence valve is provided with a gas inlet, a gas outlet, an exchange inlet, and an exchange outlet; the outlet is in communication with the gas inlet, and when the gas enters the gas inlet, the gas outlet, the exchange inlet, and the exchange The exit is open;

The chamber is in communication with the exchange inlet, the chamber is in communication with the exchange outlet, and the gas outlet is in communication with the outside atmosphere.

In one embodiment, the sequence valve is a pneumatic composite sequence valve.

In one embodiment, the sequence valve includes a valve housing, a pneumatic member, and an elastic member;

The gas inlet, the gas outlet, the exchange inlet, and the exchange outlet are both open on the valve housing, the gas outlet is in communication with the exchange outlet, and the gas outlet and the exchange outlet Isolating from the gas inlet and the exchange inlet;

The pneumatic member and the elastic member are disposed in the valve housing, and the gas inlet and the exchange inlet are respectively located at two sides of the pneumatic member;

The elastic member is connected to the pneumatic member, and the pneumatic member is provided with a vent hole, and the pneumatic member abuts against the valve housing under the action of the elastic member, so that the vent hole is closed; The pneumatic member is adjacent to a side of the gas inlet, and when the air pressure reaches a preset value, the pneumatic member is deformed, and the vent hole is opened to communicate the gas inlet and the exchange inlet.

In one embodiment, the pneumatic member includes a pneumatic body and a venting member, the pneumatic body is a flexible material, the venting member is a hard material, and the vent hole is opened on the venting member;

The valve housing includes a sealing member, and the sealing member is a flexible material. Under the action of the elastic member, the venting member abuts against the sealing member to close the vent hole.

A breathing apparatus includes a main device and the oxygen concentration detecting mechanism;

The main device includes an air oxygen mixer, and the main device is provided with an oxygen passage, an air passage and a mixed gas passage, and the oxygen passage and the air passage are respectively connected to two intake ends of the air oxygen mixer Connected, the mixed gas passage is in communication with an outlet end of the air oxygen mixer;

The oxygen concentration detecting mechanism detects an oxygen concentration of a gas in the mixed gas passage.

In one of the embodiments, the oxygen concentration detecting mechanism dynamically detects the oxygen concentration of the gas in the mixed gas passage.

In one of the embodiments, the primary device is a ventilator or an anesthesia machine.

The breathing device and the oxygen concentration detecting mechanism thereof, the oxygen concentration detecting mechanism is connected in parallel on the main device, and the oxygen gas is calibrated through the empty oxygen strobing switch to calibrate the oxygen sensor, and the calibration process can be performed when the main device is working normally. Performed to improve the accuracy of the oxygen sensor.

[Description of the Drawings]

Figure 1 is a schematic view of an embodiment of a breathing apparatus;

2 is a schematic view of a sequence valve of the breathing apparatus of FIG. 1.

【detailed description】

In order to facilitate the understanding of the present invention, the breathing apparatus and its oxygen concentration detecting mechanism will be more fully described below with reference to the related drawings. A preferred embodiment of the breathing apparatus and its oxygen concentration detecting mechanism is given in the drawings. However, the breathing apparatus and its oxygen concentration detecting mechanism can be implemented in many different forms and are not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to make the disclosure of the breathing apparatus and its oxygen concentration detecting mechanism more thorough and comprehensive.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used herein in the specification of the respiratory device and its oxygen concentration detecting mechanism is for the purpose of describing the specific embodiments and is not intended to limit the invention.

As shown in Fig. 1, a breathing apparatus 10 according to an embodiment includes a main apparatus and an oxygen concentration detecting mechanism, and the main apparatus is a ventilator or an anesthesia machine or the like. The main apparatus includes an air oxygen mixer 120, and the main apparatus is provided with an oxygen passage 140, an air passage 160, and a mixed gas passage 180, and the oxygen passage 140 and the air passage 160 communicate with the two intake ends 122 of the air oxygen mixer 120, respectively. The mixed gas passage 180 is in communication with the outlet end 124 of the air-oxygen mixer 120. The oxygen concentration detecting mechanism detects the oxygen concentration of the gas in the mixed gas passage 180.

The oxygen concentration detecting mechanism includes an empty oxygen gate switch 220, a cavity body 240, an on-off valve 260, and an oxygen sensor 280. In an embodiment, a sequence valve 230 may also be included.

The air oxygen switch 220 is provided with two air inlets 222, and the two air inlets 222 are in communication with the oxygen passage 140 and the air passage 160, respectively. The air oxygen strobe switch 220 is also provided with an air outlet 224, and the air oxygen strobe switch 220 can control the air outlet 224 to selectively communicate with or close one of the air inlets 222.

The cavity 240 is in communication with the air outlet 224, and the cavity 240 is in communication with the outside atmosphere, and the cavity 240 is in communication with the mixed gas channel 180. In one embodiment, the cavity 240 is in communication with the air outlet 224 through the sequence valve 230, and the cavity 240 is in communication with the outside atmosphere through the sequence valve 230. The sequence valve 230 is provided with a gas inlet 232, a gas outlet 234, an exchange inlet 236, and an exchange outlet 238. The air outlet 224 is in communication with the gas inlet 232, and as the gas enters the gas inlet 232, the gas outlet 234, the exchange inlet 236 and the exchange outlet 238 open. The cavity 240 is in communication with the exchange inlet 236, the cavity 240 is in communication with the exchange outlet 238, and the gas outlet 234 is in communication with the outside atmosphere.

The switching valve 260 is located between the cavity 240 and the mixed gas passage 180, and between the air outlet 224 and the cavity 240. In an embodiment, the switching valve 260 can be a pneumatic switching valve 260. The gas drives the pneumatic on-off valve 260 to isolate the cavity 240 from the mixed gas passage 180 as it passes through the passage between the air outlet 224 and the cavity 240. When the gas does not pass through the passage between the air outlet 224 and the cavity 240, the pneumatic opening and closing valve 260 is opened, and the cavity 240 is in communication with the mixed gas passage 180. In another embodiment, the number of the on-off valves 260 may be two, and the two on-off valves 260 are respectively located between the cavity 240 and the mixed gas passage 180, and between the air outlet 224 and the cavity 240.

The oxygen sensor 280 is coupled to the cavity 240, and the oxygen sensor 280 is configured to detect the oxygen concentration of the gas within the cavity 240. The oxygen concentration detecting mechanism is connected in parallel to the main device, and the oxygen gas strobe switch 220 is used to pass oxygen or air into the cavity 240 to calibrate the oxygen sensor 280. The calibration process can be performed during the normal operation of the main device, and the oxygen sensor is improved. 280 accuracy.

Specifically, in one embodiment, when the main device is in operation, the oxygen sensor 280 is calibrated, firstly, the air oxygen switch 220 is turned on to the oxygen channel 140 through an air inlet 222, and the gas drive switch valve 260 is turned on. The cavity 240 is isolated from the mixed gas passage 180, that is, the oxygen sensor 280 is isolated from the mixed gas passage 180. At the same time, another gas enters the sequence valve 230 from the gas inlet 232, and then the sequence valve 230 operates. The gas enters the cavity 240 from the exchange inlet 236. At this time, the oxygen sensor 280 can sense the oxygen, and then the gas enters the sequence by the exchange outlet 238. Valve 230 is again vented to the atmosphere by gas outlet 234, at which point oxygen sampling is completed.

Next, the air oxygen switching switch 220 is caused to open the air passage 160 through the other air inlet 222. The gas driving switch valve 260 isolates the cavity 240 from the mixed gas passage 180, that is, the oxygen sensor 280 is isolated from the mixed gas passage 180. . At the same time, another gas enters the sequence valve 230 from the gas inlet 232, and then the sequence valve 230 operates. The gas enters the cavity 240 from the exchange inlet 236. At this time, the oxygen sensor 280 can sense the air, and then the gas enters the sequence by the exchange outlet 238. The valve 230 is again vented to the atmosphere by a gas outlet 234, at which point the sampling of the air is completed.

At this point, the oxygen sensor 280 completes the calibration, the empty oxygen gate switch 220 is closed, the switching valve 260 is opened, the cavity 240 is in communication with the mixed gas passage 180, and the gas in the mixed gas passage 180 is the gas in the air passage 160 and the oxygen passage 140. The mixed oxygen-mixed gas, the oxygen sensor 280 can detect the oxygen concentration of the air-oxygen mixed gas at this time. In the non-detection state, the empty oxygen strobe valve is in a closed state, and the oxygen sensor 280 dynamically detects the oxygen concentration of the air-oxygen mixed gas.

In one of the embodiments, the sequence valve 230 can be a pneumatic composite sequence valve 230. Referring also to FIG. 2, the sequence valve 230 includes a valve housing 231, a pneumatic member 233, and an elastic member 235. Gas inlet 232, gas outlet 234, exchange inlet 236, and exchange outlet 238 are all open on valve housing 231, gas outlet 234 and exchange outlet 238 are in communication, and gas outlet 234 and exchange outlet 238 are relative to gas inlet 232 and exchange inlet 236. isolation. The pneumatic member 233 and the elastic member 235 are disposed in the valve housing 231, and the gas inlet 232 and the exchange inlet 236 are respectively located on both sides of the pneumatic member 233.

The elastic member 235 is connected to the pneumatic member 233, and the pneumatic member 233 is provided with a vent hole. Under the action of the elastic member 235, the pneumatic member 233 abuts against the valve housing 231 to close the vent hole. When the pneumatic member 233 is close to the side of the gas inlet 232 and the air pressure reaches a predetermined value, the pneumatic member 233 is deformed, and the vent hole is opened to allow the gas inlet 232 and the exchange inlet 236 to communicate.

Further, in an embodiment, the pneumatic member 233 includes a pneumatic body 2332 and a venting member 2334. The pneumatic body 2332 is a flexible material, the venting member 2334 is a hard material, and the vent hole is opened on the venting member 2334. The valve housing 231 includes a sealing member which is a flexible material. Under the action of the elastic member 235, the venting member 2334 abuts against the sealing member to close the vent hole. The hard material and the flexible material can be in close contact, making the seal reliable.

The above embodiments are merely illustrative of several embodiments of the present invention, and are not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An oxygen concentration detecting mechanism for detecting an oxygen concentration of a main device output gas, the main device comprising an air oxygen mixer, and the main device is provided with an oxygen passage, an air passage and a mixed gas passage, the oxygen passage and The air passages are respectively communicated with two intake ends of the air oxygen mixer, and the mixed gas passage is in communication with an air outlet end of the air oxygen mixer;

The oxygen concentration detecting mechanism includes an air oxygen gate switch, a cavity body, an on-off valve and an oxygen sensor;

The air oxygen gate switch is provided with two air inlets, and the two air inlets are respectively connected with the oxygen passage and the air passage; the air oxygen gate switch is further provided with an air outlet, The air oxygen gate switch is capable of controlling the outlet port to selectively communicate with or close one of the air inlets;

The cavity is in communication with the air outlet, the cavity is in communication with an external atmosphere, and the cavity is in communication with the mixed gas passage;

The switching valve is located between the cavity and the mixed gas passage, and between the air outlet and the cavity;

The oxygen sensor is coupled to the cavity, and the oxygen sensor is configured to detect an oxygen concentration of a gas in the cavity.
The oxygen concentration detecting mechanism according to claim 1, wherein said switching valve is a pneumatic switching valve;

When the gas passes through the passage between the air outlet and the cavity, the gas drives the pneumatic on-off valve to isolate the cavity from the mixed gas passage;

The pneumatic switching valve opens when gas does not pass through the passage between the air outlet and the cavity, and the cavity is in communication with the mixed gas passage.
The oxygen concentration detecting mechanism according to claim 1, wherein the number of the switching valves is two, and the two switching valves are respectively located between the cavity body and the mixed gas passage, and Between the gas port and the cavity.
The oxygen concentration detecting mechanism according to claim 1, further comprising a sequence valve, wherein said cavity body communicates with said air outlet through said sequence valve, said cavity body passing through said sequence valve and said external valve Atmospheric connectivity

The sequence valve is provided with a gas inlet, a gas outlet, an exchange inlet, and an exchange outlet; the outlet is in communication with the gas inlet, and when the gas enters the gas inlet, the gas outlet, the exchange inlet, and the exchange The exit is open;

The chamber is in communication with the exchange inlet, the chamber is in communication with the exchange outlet, and the gas outlet is in communication with the outside atmosphere.
The oxygen concentration detecting mechanism according to claim 4, wherein said sequence valve is a pneumatic composite sequence valve.
The oxygen concentration detecting mechanism according to claim 4, wherein the sequence valve comprises a valve housing, a pneumatic member and an elastic member;

The gas inlet, the gas outlet, the exchange inlet, and the exchange outlet are both open on the valve housing, the gas outlet is in communication with the exchange outlet, and the gas outlet and the exchange outlet Isolating from the gas inlet and the exchange inlet;

The pneumatic member and the elastic member are disposed in the valve housing, and the gas inlet and the exchange inlet are respectively located at two sides of the pneumatic member;

The elastic member is connected to the pneumatic member, and the pneumatic member is provided with a vent hole, and the pneumatic member abuts against the valve housing under the action of the elastic member, so that the vent hole is closed; The pneumatic member is adjacent to a side of the gas inlet, and when the air pressure reaches a preset value, the pneumatic member is deformed, and the vent hole is opened to communicate the gas inlet and the exchange inlet.
The oxygen concentration detecting mechanism according to claim 6, wherein the pneumatic member comprises a pneumatic body and a venting member, the pneumatic body is a flexible material, the venting member is a hard material, and the vent hole is opened at On the venting member;

The valve housing includes a sealing member, and the sealing member is a flexible material. Under the action of the elastic member, the venting member abuts against the sealing member to close the vent hole.
A breathing apparatus comprising: a main apparatus and the oxygen concentration detecting mechanism according to any one of claims 1 to 7;

The main device includes an air oxygen mixer, and the main device is provided with an oxygen passage, an air passage and a mixed gas passage, and the oxygen passage and the air passage are respectively connected to two intake ends of the air oxygen mixer Connected, the mixed gas passage is in communication with an outlet end of the air oxygen mixer;

The oxygen concentration detecting mechanism detects an oxygen concentration of a gas in the mixed gas passage.
The breathing apparatus according to claim 8, wherein said oxygen concentration detecting means dynamically detects an oxygen concentration of a gas in said mixed gas passage.
A breathing apparatus according to claim 8 wherein said primary device is a ventilator or an anesthesia machine.