WO2022217675A1

WO2022217675A1 - Novel ventilator having sputum removing function

Info

Publication number: WO2022217675A1
Application number: PCT/CN2021/092272
Authority: WO
Inventors: 高贵锋; 王瑞强; 王双卫; 崔丹; 于力伟; 饶青超; 何杨; 陈文福
Original assignee: 深圳市安保科技有限公司
Priority date: 2021-04-15
Filing date: 2021-05-08
Publication date: 2022-10-20
Also published as: CN215504938U

Abstract

A novel ventilator having a sputum removing function, comprising a ventilator working assembly and an air path switching device (10), the ventilator working assembly comprising a breathing tube, a positive pressure air intake branch (60) and a negative pressure air outlet branch (70). The positive pressure air intake branch (60) is used for communicating with an air source, the breathing tube is used for outputting a first airflow, and the negative pressure air outlet branch (70) is used for suctioning a gas. The air path switching device (10) is provided with a first input end, a second input end and an output end. The output end communicates with the breathing tube, the first input end communicates with the positive pressure air intake branch (60), and the second input end communicates with the negative pressure air outlet branch (70). The air path switching device (10) has an air supply state and an air extraction state. When the air path switching device is in the air supply state, the output end communicates with the first input end, and the first airflow generated by the air source flows into the output end from the first input end; and when the ventilator is in the air extraction state, the output end communicates with the second input end, and a second airflow flows into the second input end from the output end.

Description

A new type of ventilator with expectoration function

This application claims priority to the Chinese patent application filed on April 15, 2021 with application number 202120780116.7, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of medical devices, and in particular, to a novel ventilator with sputum expectoration function.

Background technique

In modern clinical medicine, ventilator, as an effective means to artificially replace the function of spontaneous ventilation, has been widely used in respiratory failure caused by various reasons, anesthesia and respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine.

However, the existing ventilator only has the function of breathing and cannot assist the user to expectorate phlegm.

technical problem

The present application proposes a novel ventilator with expectoration function, which aims to solve the problem that the ventilator in the prior art cannot assist the user to expectorate sputum.

technical solutions

In order to solve the above problems, the present application proposes a novel ventilator with sputum expectoration function. Specifically, the novel ventilator with sputum expectoration function includes a ventilator working assembly and an air path switching device, and the ventilator working assembly includes a breathing tube. The positive pressure air intake branch is used to communicate with the air source, the breathing circuit is used to output the first air flow delivered by the air source, and the The negative pressure outlet branch is used to generate negative pressure suction gas;

The air circuit switching device has a first input end, a second input end and an output end, the output end communicates with the breathing pipeline, the first input end communicates with the positive pressure air intake branch, and the The second input end communicates with the negative pressure air outlet branch; the air circuit switching device has an air supply state and an air extraction state. When the air circuit switching device is in the air extraction state, the output end and the first input so that the first air flow generated by the air source flows from the first input end into the output end; when the new ventilator with sputum expectoration function is in the air supply state, the output end and the The second input end is communicated, and the second air flow flows into the second input end from the output end.

In one embodiment, the novel ventilator with expectoration function further includes a control component, the control component is connected to the air circuit switching device, and the novel ventilator with expectoration function has a breathing working mode and a coughing mode. Sputum working mode, when the new ventilator with sputum expectoration function is in the breathing working mode, the control component controls the air circuit switching device to work in the air supply state; when the new ventilator with sputum expectoration function is in the coughing state In the phlegm working mode, the control component controls the air circuit switching device to alternately switch between the air supply state and the air extraction state.

In one embodiment, the positive pressure intake branch includes an oxygen branch, an air branch, and an air-oxygen mixing chamber, and the oxygen branch and the air branch are all communicated with the air-oxygen mixing chamber, so The air branch and the oxygen branch are respectively used to communicate with the air source and the oxygen source, and the air-oxygen mixing chamber communicates with the first input end.

In one embodiment, the control assembly further includes a sensor assembly, the sensor assembly is disposed between the first output end and the breathing circuit, and the sensor assembly is connected to the control member.

In one embodiment, the sensor assembly includes a pressure sensor, a sound sensor, and a flow sensor.

In one embodiment, the negative pressure gas outlet branch includes a vacuum pump, the vacuum pump communicates with the second input end, and the vacuum pump is used to flow the second gas flow from the output end into the second input end.

In one embodiment, the negative pressure outlet branch further includes a pressure proportional valve, and the pressure proportional valve is arranged between the vacuum pump and the second input end.

In an embodiment, the negative pressure air outlet branch further includes an air tank, and the air tank is arranged between the pressure proportional valve and the vacuum pump.

In one embodiment, the novel ventilator with expectoration function further includes a PEEP control device, the PEEP control device is connected to the breathing circuit, and the PEEP control device is used for the end of the user's exhalation. , output the third airflow to the breathing circuit.

In an embodiment, the novel ventilator with sputum expectoration function further includes a sputum collecting device, and the sputum collecting device is connected to the breathing pipeline.

beneficial effect

The present application proposes a novel ventilator with a sputum expectoration function. Specifically, the novel ventilator with a sputum expectoration function includes an air circuit switching device, and the air circuit switching device has an air supply state and an air extraction state, so that the The new ventilator with sputum expectoration function has a breathing working mode and an expecting sputum working mode, and can control the air circuit switching device to alternately switch between the air supply state and the air extraction state to simulate the effect of human cough, so that the sputum in the small airways of the human body can flow to the air. The main airway moves, and is finally brought out of the human body through the second airflow to realize the expectoration work mode. The ventilator control component of the present application can control the work of the ventilator, the respiratory work mode and the expectoration work mode, and at the same time satisfy the user's breathing and expectoration. need.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort.

1 is a circuit diagram of an embodiment of a ventilator control assembly of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of a ventilator according to the present application.

Description of reference numbers:

标号 label	名称 name	标号 label	名称 name
10 10	气路切换装置 Air switching device	22 twenty two	驱动电路 Drive circuit
20 20	气路切换控制电路 Air circuit switching control circuit	41 41	第一压力传感器 first pressure sensor
30 30	痰液淤积传感器 Sputum accumulation sensor	42 42	流量传感器 Flow Sensors
40 40	信号采集传感器模组 Signal acquisition sensor module	61 61	空气支路 air bypass
50 50	通讯模块 Communication module	62 62	氧气支路 oxygen bypass
60 60	正压进气支路 Positive pressure intake branch	63 63	空氧混合室 Air Oxygen Mixing Chamber
70 70	负压出气支路 Negative pressure outlet branch	71 71	真空泵 vacuum pump
80 80	输入单元 input unit	72 72	气罐 gas tank
90 90	PEEP控制装置 PEEP control device	73 73	压力比例阀 Pressure proportional valve
100 100	集痰装置 Phlegm collection device	74 74	第二压力传感器 second pressure sensor
21 twenty one	处理器 processor

The realization, functional characteristics and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present application, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, if the meaning of "and/or" appears in the whole text, it includes three parallel schemes, taking "A and/or B" as an example, including scheme A, or scheme B, or the scheme that A and B satisfy at the same time . In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist. It is also not within the scope of protection claimed in this application.

The present application proposes a novel ventilator with sputum expectoration function. Specifically, the ventilator includes a ventilator working assembly and an air circuit switching device 10. The ventilator working assembly includes a breathing circuit, a positive pressure air intake branch 60, a negative pressure The pressure outlet branch 70, the positive pressure air inlet branch 60 are used to communicate with the air source, the breathing circuit is used to output the first airflow delivered by the air source, and the negative pressure air outlet branch 70 is used to generate negative pressure suction gas; The circuit switching device 10 has a first input end, a second input end and an output end, the output end is connected to the breathing circuit, the first input end is connected to the positive pressure air intake branch 60, and the second input end is connected to the negative pressure air outlet branch 70 ; The air circuit switching device 10 has a supply state and an air extraction state. When the air circuit switching device 10 is in an air extraction state, the output end is communicated with the first input end, so that the first air flow generated by the air source flows into the first input end. The output end; when the ventilator is in the air supply state, the output end communicates with the second input end, and the second air flow flows into the second input end from the output end.

In this embodiment, the first airflow may be the airflow flowing from the breathing circuit of the ventilator to the human body, and the second airflow may be the airflow flowing from the human body to the ventilator, that is, when the air circuit switching device 10 When in the air supply state, relative to the human body, the air pressure of the first air flow is greater than the human body air pressure, which is positive air pressure; when the air circuit switching device 10 is in the air pumping state, the air pressure of the second air flow is lower than the human body air pressure, which is negative air pressure. .

Wherein, the gas path switching device 10 can be realized by using an electromagnetic reversing valve or other reversing valve, which is not limited here, as long as the requirements for switching the output of the first air flow and the second air flow are satisfied.

In one embodiment, the ventilator further includes a control component, the control component is connected to the air circuit switching device 10, the ventilator has a breathing working mode and a expectoration working mode, and when the ventilator is in the breathing working mode, the control component controls the air circuit switching device. 10 works in the air supply state; when the ventilator is in the expectoration working mode, the control component controls the air circuit switching device 10 to alternately switch between the air supply state and the air extraction state.

In addition, the novel ventilator with expectoration function may further include an exhaust valve. When the novel ventilator with expectoration function works in the breathing mode, when the user inhales, the exhaust valve is closed, so that the exhaust valve is closed. The user inhales the first airflow alone, and when the user exhales, the exhaust valve opens to exhaust the gas in the human body. When the novel ventilator with expectoration function works in the expectoration working mode, the exhaust valve is in a closed state. The novel ventilator with expectoration function may further include a breathing valve, which can cooperate with the control assembly of the novel ventilator with expectoration function to assist human respiration.

Further, the control assembly includes an air circuit switching control circuit 20 , and the air circuit switching control circuit 20 is electrically connected to the controlled end of the air circuit switching device 10 . The air circuit switching control circuit 20 controls the first input end and the second input end of the air circuit switching device 10 to alternately communicate with the output end; when the novel ventilator with sputum expectoration function works in the breathing mode , the air circuit switching control circuit 20 controls the first input end of the air circuit switching device 10 to communicate with the output end.

In this embodiment, the air circuit switching control circuit 20 is realized by a combination of the processor 21 and the driving circuit 22 of the air circuit switching device 10. In this embodiment, the air circuit switching device 10 is an electromagnetic reversing valve as an example for description. The drive circuit 22 may control the electromagnetic reversing valve to connect to the first input and output when receiving a high level, and the drive circuit 22 may control the electromagnetic reversing valve to connect to the second input when receiving a low level. terminal and output terminal. In this way, when controlling the ventilator to work in the expectoration mode, the processor 21 can output the PWM signal to the drive circuit 22, so that the drive circuit 22 can control the first input end and the second input end of the electromagnetic reversing valve alternately It is connected with the output end, so that the first air flow and the second air flow are alternately output to the breathing circuit, so as to realize the positive and negative ventilation of the human body, and achieve the effect of simulating the human body's cough, so that the sputum in the small airway of the human body moves to the main airway. , and finally brought out of the human body through the second airflow.

In addition, by adjusting the duty ratio of the PWM signal output by the processor 21, the ratio between the turn-on time of the first input end and the output end of the electromagnetic directional valve and the turn-on time of the second input end and the output end can be adjusted. That is, the ratio of the first airflow and the second airflow output by the breathing circuit of the ventilator is adjusted, so that the user can choose the expectoration time and the expectoration intensity according to the actual application requirements. The duty cycle of the PWM signal output by the processor 21 may be a fixed value, or the current vital signs of the user, such as phlegm sound, etc., may be acquired through sensors, etc., to determine the current needs of the user, and adjust the duty cycle of the PWM signal to achieve Automatic expectoration. Alternatively, a key or the input unit 80 of the touch screen can also be used to trigger and output the breathing ratio control signal to the processor 21, and the processor 21 then adjusts the duty cycle of the PWM signal according to the breathing ratio control signal.

When the ventilator works in the breathing mode, the processor 21 can adjust the duty ratio of the output PWM signal to 100%, so that the first input end of the electromagnetic reversing valve is connected with the output end, and the first air flow is output to the breathing The first air flow is output to the human body through the breathing pipeline, so as to increase the lung ventilation and assist the human body to breathe.

The technical solution of the present application is to set the first input end of the air circuit switching device 10 to be connected to the first airflow, the second input end of the air circuit switching device 10 to be connected to the second air flow, and the output end of the air circuit switching device 10 to be connected to the ventilator. The breathing circuit is connected, and then the first input end of the air circuit switching device 10 is controlled to communicate with the output end through the air circuit switching control circuit 20, and the first air flow is output to the human body through the breathing circuit, so as to assist the user to breathe and realize the ventilation of the ventilator. In the breathing working mode, the present application also controls the first input end and the second input end of the air circuit switching device 10 to communicate alternately with the output end through the air circuit switching control circuit 20, so that the first air flow and the second air flow are alternately output to the breathing tube. The sputum in the small airway of the human body moves to the main airway, and finally is brought out of the human body through the second air flow to realize the sputum working mode. In other words, in the traditional ventilator, when the user needs to expectorate sputum, the ventilator needs to be turned off first, and then the user can expectorate sputum by himself; while the ventilator of the present application assists the user in breathing, when the user needs to expectorate sputum, it can be directly Switch to expectoration work mode to assist the user to expectorate and realize intelligent control of the ventilator. This not only helps the user to expectorate sputum better, but also does not need to turn off the ventilator when expecting sputum, and only needs to control the switching of the air path. The device 10 can realize switching from the breathing work mode to the expectoration work mode, so as to assist the user to expectorate the phlegm, and the user can discharge the phlegm through the trachea. It reduces the operation time of inserting and pulling out the trachea, avoids the problem that the user cannot be assisted to breathe during the insertion and extraction of the trachea, and solves the waste of resources caused by equipment switching.

In practical applications, the novel ventilator control component with expectoration function can control the ventilator to work in the breathing mode all the time to assist the user to breathe; and when triggered by a button or the ventilator control component detects that the user needs to expectorate Switch to the expectoration work mode to assist the user to expectorate sputum, and switch back to the breathing work mode when the sputum accumulation in the user's body is triggered by a button or when it is detected that the amount of sputum accumulation in the user's body is less than the preset value or the expectoration work mode lasts for a preset time. , continue to assist the user to breathe.

2, in one embodiment, the novel ventilator control assembly with sputum expectoration function further includes a communication module 50; the air circuit switching control circuit 20 communicates with an external terminal through the communication module 50; the The air circuit switching control circuit 20 is further configured to receive the breathing ratio control signal output by the external terminal through the communication module 50, and adjust the first input end and the first input end of the air circuit switching device 10 according to the breathing ratio control signal. The two input terminals communicate with the output terminal alternately for periods of time.

In this embodiment, the communication module 50 may be a WIFI communication module, a Bluetooth communication module or a mobile communication module, such as a 2G, 3G, 4G or 5G mobile communication module, which is not limited here.

The air path switching control circuit 20 is also used to output the data collected by the signal collection sensor module 40 and the phlegm accumulation sensor 30 to an external server or an external terminal in real time. Therefore, the external server or the external terminal can store and analyze the received data, thereby improving the utilization rate of the data; it is also possible to adjust the output breathing ratio control signal to the communication module 50 according to the analysis result, which is received by the communication module 50 in this embodiment. The breathing ratio control signal output by the mobile terminal can adjust the ratio of the expiratory time and the inhalation time, realize the wireless control of the ventilator, and improve the controllability of the ventilator.

2 , in one embodiment, the novel ventilator with expectoration function further includes: a user input circuit electrically connected to the control assembly of the novel ventilator with expectoration function, and the user input circuit is used for When triggered by the user, a breathing ratio control signal is output to the novel ventilator control component with expectoration function.

In this embodiment, the input unit 80 may be a touch display screen, or may be a mouse, a keyboard or a key, etc., which is not limited here. This embodiment is described by taking the touch screen as an example. The novel ventilator control component with sputum expectoration function can receive the respiration ratio control signal triggered and output by the touch screen, so as to adjust the ratio of the output duration of the first airflow and the output of the second airflow. , that is, the breathing ratio, to adapt to different user needs. The touch display screen can also display pneumatic parameters such as airway pressure and airway flow when the ventilator is working, for reference by doctors or users.

In one embodiment, the positive pressure intake branch 60 includes an oxygen branch 62, an air branch 61 and an air-oxygen mixing chamber 63. The oxygen branch 62 and the air branch 61 are all communicated with the air-oxygen mixing chamber 63, and the air branch The circuit 61 and the oxygen branch circuit 62 are respectively used to communicate with the air source and the oxygen source, and the air-oxygen mixing chamber 63 communicates with the first input end.

The air branch 61 can discharge air into the air-oxygen mixing chamber 63 through a blower motor, and the oxygen branch 62 can be an oxygen tank 72 (which can be equipped with a pressure proportional valve 73 ) or an oxygen supply system of a hospital. , the oxygen is discharged into the air-oxygen mixing chamber 63, and the air-oxygen mixing chamber 63 mixes oxygen and air and outputs it to the first input end of the ventilator control assembly; in this embodiment, the air and oxygen are mixed to form a first airflow , output to the breathing control component, so that when the breathing control component outputs the first airflow to the human body, the mixed gas of air and oxygen in this embodiment can better assist the human body to breathe compared to the single air.

In one embodiment, the control assembly of the ventilator further includes a sensor assembly, the sensor assembly is disposed between the first output end and the breathing circuit, and the sensor assembly is connected to the control member. In one embodiment, the sensor assembly includes a pressure sensor, a sound sensor, and a flow sensor 42 .

Further, according to the function of the sensor, the sensor assembly includes a phlegm accumulation sensor 30 and a signal collection sensor module 40 . The sputum accumulation sensor 30 is used to detect the amount of sputum accumulation and output a corresponding sputum accumulation detection signal; the air path switching control circuit 20 is used to determine that the user has sputum accumulation according to the sputum accumulation detection signal. , trigger the novel ventilator with expectoration function to work in the expectoration mode, and control the first input end and the second input end of the air circuit switching device 10 to alternately communicate with the output end. Wherein, the sputum accumulation sensor 30 may be a sound sensor or other sensors capable of detecting the amount of sputum accumulation.

Specifically, the sound sensor collects the phlegm sound emitted by the human body, and the air path switching control circuit 20 performs preprocessing according to the high and low frequency acoustic characteristics of the phlegm sound, and performs time domain, frequency domain and time-frequency domain analysis. process to obtain a low-dimensional statistic with low computational complexity and strong classification characteristics, so as to determine the sputum accumulation amount according to the statistic, and when the sputum accumulation amount is greater than a preset value, control the new type of sputum-expelling function The ventilator works in the expectoration work mode, and this embodiment realizes the automatic detection of the sputum accumulation and turns on the expectoration work mode, which improves the intelligence of the ventilator.

In one embodiment, the step of detecting the sputum accumulation amount and outputting the corresponding sputum accumulation detection signal specifically includes:

Obtain the user's respiratory mechanics parameters and increments;

Fuzzy the acquired respiratory mechanics parameters and their increments;

Fuzzy respiratory mechanics parameters and their increments will be used to calculate fuzzy sputum accumulation;

The fuzzy sputum accumulation amount was de-fuzzed into the detection signal of sputum accumulation.

In this embodiment, the respiratory mechanics parameters include: airway pressure and air flow.

In this embodiment, the flow sensor 42 and the first pressure sensor 41 arranged on the output airway between the output end of the air circuit switching device 10 and the breathing circuit of the ventilator are used to collect the output of the output airway of the ventilator. The respiratory mechanics parameters of the airflow, that is, the airway pressure and airflow when the human body is breathing. And according to the collected respiratory mechanics parameters, statistics are made to obtain the increments of the respiratory mechanics parameters; the respiratory mechanics parameters and their increments are fuzzified.

Then design the membership function, and carry out the fuzzy rules according to the clinical experience of doctors. The fuzzy rules are used to perform fuzzy inference on the respiratory mechanics parameters and their increments, so as to obtain the accumulation of fuzzy sputum. Finally, the fuzzy sputum is calculated by the centroid method. The sputum deposition amount is de-fuzzed, converted into a sputum deposition detection signal and output.

Among them, the clinical experience of doctors can be based on respiratory mechanics parameters, that is, airway resistance, thoracic compliance, thoracic compliance and lung recruitability are determined by airway pressure and air flow, and then based on airway resistance, thoracic compliance, thoracic Compliance and lung recruitability determine the user's sputum accumulation.

Of course, the sputum accumulation detection signal may also adopt other detection methods, which are not limited here.

This embodiment realizes the automatic detection of sputum accumulation and enables the sputum expectoration working mode, which improves the intelligence of the ventilator.

The signal acquisition sensor module 40 is electrically connected with the air circuit switching control circuit 20, and the signal acquisition sensor module 40 is used to collect the parameter information of the user's breathing/inhalation gas; the air circuit switching control circuit 20 also It is used to control the operation of the air circuit switching device 10 according to the parameter information of the user's breathing/breathing gas.

In this embodiment, the collection sensor module may include: a first pressure sensor 41 and a flow sensor 42; of course, it may also include other sensors, which are not limited here. The first pressure sensor 41 and the flow sensor 42 can be arranged in the airway between the output end of the air circuit switching device 10 and the breathing circuit of the ventilator to detect the air pressure of the air flow at the output end of the air circuit switching device 10 and Air flow, further, the air circuit switching control circuit 20 can perform preprocessing such as filtering and noise reduction on the data such as the air pressure and air flow, and draw the air flow-lung volume curve and the air pressure-lung volume curve, and collect the air pressure and air flow in real time. , and then measure the airway resistance, thoracic compliance, thoracic compliance and lung recruitability in real time according to the air pressure and airflow, and then the ventilator control component can measure the airway resistance, thoracic compliance, thoracic compliance and lung recruitability. When one or more of the parameters exceed the preset value, it is determined that the user needs to expectorate, and then the ventilator is controlled to switch to the expectoration mode. Spend.

In one embodiment, the negative pressure air outlet branch 70 includes a vacuum pump 71, which is communicated with the second input end, and the vacuum pump 71 is used to flow the second air flow from the output end into the second input end. Specifically, the vacuum pump 71 is used to create negative pressure, so that the second airflow is subjected to the negative pressure, flows from the output end to the second input end, and finally passes through the pressure proportional valve 73 and the air tank 72 in sequence.

The negative pressure air outlet branch also includes a second pressure sensor 74, the collection end is connected to the gas tank, and the output end is connected to the air circuit switching control circuit, for collecting and outputting the pressure of the air tank.

In one embodiment, the negative pressure outlet branch 70 further includes a pressure proportional valve 73, and the pressure proportional valve 73 is disposed between the vacuum pump 71 and the second input end. The pressure proportional valve 73 is provided to regulate the pressure of the second gas flow output to the second input of the ventilator control assembly.

In one embodiment, the negative pressure air outlet branch 70 further includes an air tank 72 , and the air tank 72 is disposed between the pressure proportional valve 73 and the vacuum pump 71 . In practical applications, the vacuum pump 71 draws out the air in the air tank 72, so that the air and oxygen in the air tank 72 outputs negative pressure to the pressure proportional valve 73, and the pressure proportional valve 73 adjusts the output to the second input end of the ventilator control assembly. The pressure of the second air flow. In this embodiment, through the arrangement of the air tank 72, the pressure of the second airflow can be made larger, which is beneficial to improve the pressure adjustment range of the second airflow of the ventilator. In one embodiment, the novel ventilator with expectoration function further includes a pressure sensor connected to the air tank 72 .

In one embodiment, the ventilator further includes a PEEP control device 90, the PEEP control device 90 is connected to the breathing circuit, and the PEEP control device 90 is used to output the third airflow to the breathing circuit at the end of the user's exhalation.

In this embodiment, the input end of the PEEP control device 90 can be connected to the atmosphere, or to the air branch 61 of the positive pressure intake branch 60 , and the output end of the PEEP control device 90 can be connected to the air through the exhaust valve. The breathing circuit can also be directly connected to the breathing circuit. Here, the connection between the PEEP device and the breathing circuit through the exhaust valve is used as an example.

The PEEP control device 90 detects whether the user is at the end of breathing. Specifically, the PEEP control device 90 can be connected through the signal acquisition sensor module 40 of the ventilator control assembly, and the aerodynamic data collected by the signal acquisition sensor module 40 can be connected. The parameters (air pressure and airflow) determine whether the user is at the end of expiration, and when it is determined that the user is at the end of expiration, the gas in the air branch 61 is exhausted to the exhaust valve to increase the pressure of the exhaust valve, thereby hindering the The user outputs the gas to the input end of the exhaust valve, so as to provide positive pressure for the user's end-expiration, preventing the user from completely expelling the gas, preventing the early closure of the alveoli, and causing some of them to lose ventilation due to exudation, atelectasis, etc. The functional alveoli expand, so that the ventilator of this embodiment can increase the reduced functional residual capacity and achieve the purpose of improving blood oxygen.

In one embodiment, the ventilator further includes a sputum collecting device 100, which is connected to a breathing circuit. Optionally, the sputum collecting device 100 is arranged in parallel with the breathing circuit of the novel ventilator with sputum expectoration function. The sputum collecting device 100 can be connected to the breathing circuit, so that when the ventilator works in the expectoration mode, the sputum collecting device 100 can store the sputum coughed up by the user. Of course, the sputum collecting device 100 can also It can be a separately set sputum collecting pot, so that when the user expects sputum, the sputum can be coughed into the sputum collecting device 100 to ensure hygiene.

The above descriptions are only optional embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Under the concept of the present application, any equivalent structural transformation made by using the contents of the description and drawings of the present application, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of this application.

Claims

A new type of ventilator with expectoration function, which includes:

The working assembly of the ventilator includes a breathing circuit, a positive pressure inlet branch, and a negative pressure outlet branch, the positive pressure inlet branch is used to communicate with an air source, and the breathing circuit is used to transport the air source The first air flow output, the negative pressure air outlet branch is used to generate negative pressure suction gas;

An air circuit switching device, the air circuit switching device has a first input end, a second input end and an output end, the output end communicates with the breathing pipeline, and the first input end communicates with the positive pressure intake air a branch, the second input end is connected to the negative pressure outlet branch;

The air path switching device has an air supply state and an air extraction state. When the air path switching device is in the air extraction state, the output end is communicated with the first input end, so that the first air source generated by the air source is connected. The air flow flows into the output end from the first input end; when the new ventilator with sputum expectoration function is in the air supply state, the output end is communicated with the second input end, and the second air flow flows from the output end terminal flows into the second input terminal.
The ventilator according to claim 1, wherein the new ventilator with sputum expectoration function further comprises a control component, the control component is connected with the air circuit switching device, and the new ventilator with sputum expectoration function It has a breathing working mode and a sputum expecting working mode. When the new ventilator with sputum expectoration function is in the breathing working mode, the control component controls the air circuit switching device to work in an air supply state; When the novel ventilator is in the expectoration working mode, the control component controls the air circuit switching device to alternately switch between the air supply state and the air extraction state.
The ventilator according to claim 2, wherein the positive pressure air intake branch comprises an oxygen branch, an air branch and an air-oxygen mixing chamber, and the oxygen branch and the air branch are all connected with the air branch. The oxygen mixing chamber is communicated, the air branch and the oxygen branch are respectively used for communicating with the air source and the oxygen source, and the air-oxygen mixing chamber communicates with the first input end.
The ventilator of claim 3, wherein the control assembly further comprises a sensor assembly disposed between the first output end and the breathing circuit, the sensor assembly and the control assembly piece connection.
5. The ventilator of claim 4, wherein the sensor assembly includes a pressure sensor, a sound sensor, and a flow sensor.
The ventilator according to claim 3, wherein the negative pressure outlet branch comprises a vacuum pump, the vacuum pump communicates with the second input end, and the vacuum pump is used to flow the second airflow from the output end into the the second input.
The ventilator according to claim 6, wherein the negative pressure outlet branch further comprises a pressure proportional valve, and the pressure proportional valve is arranged between the vacuum pump and the second input end.
The ventilator according to claim 7, wherein the negative pressure air outlet branch further comprises an air tank, and the air tank is arranged between the pressure proportional valve and the vacuum pump.
The ventilator according to claim 1, wherein the new ventilator with sputum expectoration function further comprises a PEEP control device, the PEEP control device is connected with the breathing circuit, and the PEEP control device is used for At the end of expiration, a third airflow is output to the breathing circuit.
The ventilator according to claim 1, wherein the novel ventilator with sputum expectoration function further comprises a sputum collecting device, and the sputum collecting device is connected with the breathing pipeline.