WO2022088549A1

WO2022088549A1 - Self-adaptive ventilator system

Info

Publication number: WO2022088549A1
Application number: PCT/CN2021/075200
Authority: WO
Inventors: 涂建光
Original assignee: 联赢医疗科技有限公司
Priority date: 2020-10-26
Filing date: 2021-02-04
Publication date: 2022-05-05
Also published as: CN112220999B; CN112220999A

Abstract

A ventilator system, comprising a ventilator (1), a controller (2) and a face mask (3). The ventilator comprises a humidifier (101), the face mask is connected to the humidifier through a pipeline, the face mask is internally provided with a humidity sensor, and the controller is used to control, after the face mask is worn, the shift position of the humidifier according to a humidity value measured by means of the humidity sensor. The ventilator system can adjust the humidity in the face mask in real time, such that the breathing environment in the face mask is a favorable environment suitable for breathing.

Description

Adaptive Ventilator System

technical field

The invention relates to a ventilator system, in particular to a ventilator system capable of automatically controlling the gear position of a humidifier according to the humidity value in a mask.

Background technique

At present, for people who have difficulty breathing spontaneously, a ventilator is a vital medical device to maintain normal vital signs. When the user uses the ventilator, the ventilator and the mask are connected through the connecting pipe, and the gas in the ventilator will enter the mask through the connecting pipe for the user to breathe. Existing ventilators are generally equipped with a humidifier, which is used to humidify the air to make the use of the ventilator more comfortable in a dry environment. For example, if the user feels dry mouth, the heating and humidifying function can be turned on; if the user feels that there is water vapor in the mask, the heating and humidifying level can be lowered. The heating and humidifying level is generally set to 0 to 4 levels. 0 is to turn off the heating and humidification function, 1 is the lowest heating and humidification level, and 4 is the highest heating and humidification level.

However, ventilators are generally used when the user is sleeping, so simple gear settings can be difficult to switch. There is no way for users to switch when they are sleeping. For example, it is set to gear 1 before going to bed, and when they feel dry, they will not switch to gear 2. It is set to 4th gear before going to bed, which is relatively humid, and will not automatically switch to 3rd gear when sleeping. The ventilator gear is not switched unless it feels particularly dry or wet during sleep and wakes up in the middle of the night.

It can be seen that in this case, the breathing environment in the mask will be unfavorable for the user.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an adaptive ventilator system, which can automatically control the gear position of the humidifier of the ventilator according to the humidity value in the mask, so that the mask is kept in a breathing environment suitable for the user's breathing, which is beneficial to the user's health. .

The technical scheme adopted in the present invention is:

An embodiment of the present invention provides an adaptive ventilator system, including: a ventilator, a controller and a mask, the ventilator includes a humidifier, the mask is connected to the humidifier through a pipeline, and a humidity is set in the mask Sensor, the controller stores the preset reference temperature [Wmin, Wmax] and humidity queue Q=(Q1, Q2, ......, Qn), n is the preset queue length, Qi is each time The ith humidity value detected by the humidity sensor during use, Q is initialized to Null; the controller is configured to, after the mask is worn, according to the humidity value detected by the humidity sensor, the reference temperature and the humidity A queue is used to control the gears of the humidifier, and the gears include an off gear indicating that the humidifier is in an off state and a plurality of humidifying gears indicating that the humidifier is in a humidifying state.

Optionally, the gears of the humidifier include m gears, m=2 ^x , x is an integer greater than or equal to 2, wherein 0 represents the off gear, 1, . . . , m-1 represents the humidifying gear that increases gradually .

Optionally, the controlling the gear position of the humidifier according to the humidity value detected by the humidity sensor, the reference temperature and the humidity queue includes:

S100, sampling the humidity value W0 detected by the humidity sensor every predetermined time;

S110, if Q=Null, and W0<Wmin, then determine the gear G of the humidifier according to Wmin and W0, and do not add W0 to the humidity queue Q;

S120, if Q=Null and W0≥Wmin, then add W0 to the humidity queue Q.

Optionally, in S110, the gear

Optionally, in S110, the gear position G is determined in the following manner:

If W0<D1, then G=m-1; otherwise,

D1 is the preset humidity threshold.

Optionally, D1=Win/4.

S130, if W0>Wmax, and the current gear G _is >0, then switch the current gear of _the humidifier to gear G=G=-1;

S140, if Q≠Null, if the length of Q is less than n, then add W0 to Q;

S150, if the length of Q is equal to n, then remove Q1 from Q, move Qi+1 to Qi in the humidity queue, and add W0 to Q as Qn;

S160, obtain the humidity quantity z in the humidity queue Q, z≤n;

S170, according to the humidity value in Q, determine whether to switch the gear of the humidifier.

Optionally, S170 specifically includes:

S172, obtain k and b such that

S174, if k<k1, and the current gear G _is <m-1, then switch the current gear to G=G _when +1; end;

S176, if K>k2, and the current gear G _is >0, then switch the current gear to G=G _when -1; end;

S178, if k1≤k≤k2, do not switch the current gear; end;

k1 and k2 are preset thresholds.

Optionally, k1<0, k2>0.

Optionally, k1+k2=0.

In the adaptive ventilator system provided by the embodiment of the present invention, a humidity sensor is provided in the mask worn by the user, and the controller samples the humidity value in the mask detected by the humidity sensor at predetermined intervals, and according to the sampled humidity value and the preset humidity value The set reference temperature and humidity queue are used to control the gear of the humidifier, so as to control the humidity in the mask to a comfortable breathing environment suitable for breathing, which can improve the user experience.

Description of drawings

FIG. 1 is a schematic structural diagram of an adaptive breathing system provided by an embodiment of the present invention.

2 to 4 are schematic diagrams of the structure of an existing ventilator, wherein, FIG. 2 and FIG. 3 are schematic appearance diagrams of the existing ventilator, and FIG. 4 is a schematic diagram of the pneumatic structure of the existing ventilator.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

In some of the processes described in the description and claims of the present invention and the above-mentioned drawings, various operations are included in a specific order, but it should be clearly understood that these operations may not be in accordance with the order in which they appear herein. For execution or parallel execution, the sequence numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the sequence numbers themselves do not represent any execution order. Additionally, these flows may include more or fewer operations, and these operations may be performed sequentially or in parallel.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1, an embodiment of the present invention provides an adaptive ventilator system, including: a ventilator 1, a controller 2, and a mask 3, the ventilator includes a humidifier 101, the mask 3 and the humidifier Connected by pipes (not shown), the mask 3 is provided with a humidity sensor (not shown), and the controller 2 stores a preset reference temperature [Wmin, Wmax] and a humidity queue Q=(Q1, Q2,...,Qn), n is the preset queue length, Qi is the ith humidity value detected by the humidity sensor during each use period, and Q is initialized to Null; After being worn, the gear position of the humidifier is controlled according to the humidity value detected by the humidity sensor, the reference temperature and the humidity queue. Indicates that the humidifier is in a humidifying state with multiple humidification gears.

Further, in this embodiment of the present invention, the ventilator 1 may be an existing ventilator structure. For example, as shown in FIG. 2 to FIG. A control panel 103, a display screen 104, an air inlet 105, a power port 106, etc. are provided. A fan 109 may be provided inside the host 102. The control panel 103 is provided with operation keys, including an up direction key, a start/stop key, a down direction key key, the left direction key and the right direction key, the humidifier 101 may include a water tank 107 and a heating sheet 108 arranged on the main unit 102, and the water tank is provided with a gas outlet connected to a pipeline. One end of the fan 107 is connected to the air inlet 105, and the other end is connected to the water tank through a connecting pipe. A pressure sensor 110 and a flow sensor 111 are arranged on the connecting pipe between the fan and the water tank, and an inlet filter 112 is arranged at the air inlet 105. to filter impurities in the air. When using the ventilator, the heating plate starts to heat the water tank, and the fan 109 is activated at the same time, and the external air is sucked into the main body, and then sent to the water tank. The water vapor generated by the airflow delivered by the fan and the heating on the heating plate will be input to the mask through the pipeline. , to fill the mask 3 with gas.

Further, in the embodiment of the present invention, the situation that the mask is worn by the user may be detected by using the prior art. The humidity sensor is arranged in a position in the mask that is not easily affected by the humidity in the duct, for example, at a position relatively far from the duct and the mask, not at the outlet of the duct and not in the direction of the airflow of the duct.

In the embodiment of the present invention, the gears of the humidifier 101 may include m gears, m=2 ^x , x is an integer greater than or equal to 2, wherein 0 represents the off gear, 1, . . . , m-1 represents the gradually increasing Humidification gear. Preferably, x is equal to 2 or 3. In a preferred example, x may be equal to 2, so that the humidifier 101 may have 4 gears, wherein 0 is an off gear and 1-3 are gradually increasing humidification gears. The gear control of the humidifier can be controlled by a valve. Specifically, a valve support frame may be provided at the end where the pipeline is connected to the water tank, and x fan-shaped valves may be set on the valve support frame with the axial center of the pipeline as the connection point, and the x fan-shaped valves are sequentially connected to form a circle, That is, the X sector valves are all closed, and the pipeline is in a closed state. The areas of the x valves are set as: the area of the first valve is S1, the area of the second valve is S2, the area of the xth valve is Sx, Si+1=2*Si, and the value of i is 1 to x .

In this way, in the case of gear 4, the area of the first valve is S1, and the area of the second valve is S2, S2=2*S1. 0 corresponds to both S1 and S2 closed; 1 corresponds to S1 open; 2 Corresponds to S2 on; 3 corresponds to both S1 and S2 on. The controller only needs to control the switches of the first valve and the second valve according to the humidity value, so as to control the gear position of the humidifier. The concrete realization of the valve adopts the prior art.

In the embodiment of the present invention, the controller 2 may be a separate control device, or may be a control chip integrated on the control chip of the ventilator 1 . The preset reference temperature [Wmin, Wmax] stored in the controller 2 may be, for example, Wmin=40, Wmax=70 according to Deli. Of course, it can also be reset according to the suggestion of the user's doctor, which is not particularly limited in the present invention. In addition, during each use by the user, the humidity queue in the controller 2 will be initialized, that is, the previously used humidity queue value will be cleared.

Further, in the embodiment of the present invention, the controller 2 can set the initial gear position of the humidifier according to the humidity value detected by the humidity sensor and the reference temperature and humidity queue, and switch the gear position of the humidifier during use. .

Wherein, when the controller sets the initial gear position based on the humidity value detected by the humidity sensor, the gear position of the humidifier is controlled according to the humidity value detected by the humidity sensor, the reference temperature and the humidity queue, Can include:

S100, sampling the humidity value W0 detected by the humidity sensor every predetermined time; in the embodiment of the present invention, the predetermined time may be 1-10 minutes, preferably 3-5 minutes, so as to timely control the humidity in the mask.

S120, if Q=Null and W0≥Wmin, then add W0 to the humidity queue Q.

Q=Null, indicating that there is an undetected humidity value in the humidity queue, that is, the user has just used the ventilator. Steps S110 and S120 can set the initial gear of the humidifier to a humidification gear such that W0 is greater than Wmin.

The gear position G of the humidifier in step S110 can be determined in the following two ways:

Mode 1: In S110, the gear

Mode 2: In S110, the gear position G is determined in the following manner:

If W0<D1, then G=m-1; otherwise,

D1 is a preset humidity threshold, for example, D1=Wmin/4.

Mode 1 is linearly determined, and the gear G can be obtained simply and quickly. Mode 2, it is easier to quickly reach Wmin when W0 is small, and the efficiency is higher. The introduction of D1 is to avoid switching between multiple valves when m is large.

In the embodiment of the present invention, when the controller switches the gear position of the humidifier based on the humidity value detected by the humidity sensor during use, the humidity value detected by the humidity sensor, the reference temperature and the humidity queue To control the gear position of the humidifier, it may include: S130, if W0>Wmax, and the current gear G _when > 0, then switch the current gear of the humidifier to the gear G = G _when -1, that is, down First gear; execute S240;

S140, if Q≠Null, if the length of the humidity queue Q is less than n, then add W0 in S130 to the humidity queue Q;

S150, if the length of the humidity queue Q is equal to n, then remove Q1 from the humidity queue Q, move Qi+1 to Qi in the humidity queue, and add W0 in S130 to the humidity queue Q as Qn;

S160, obtain the humidity quantity z in the humidity queue Q, z≤n;

S170, according to the humidity value in the humidity queue Q, determine whether to switch the gear of the humidifier.

After the previous steps, the humidity value W0 detected by the humidity sensor is the humidity value within the reference humidity [Wmin, Wmax]. At this time, it is necessary to judge whether to switch gears according to the humidity queue Q. For example, if the humidity in the humidity queue Q keeps rising, the gear needs to be lowered. If the humidity in the humidity queue Q keeps falling, the gear needs to be raised. Specifically, S170 may include:

S172, obtain k and b such that

S174, if k<k1, and the current gear position G _is <m-1, then switch the current gear position to G=G _when +1, that is, up a gear; end;

S176, if K>k2, and the current gear G _is >0, then switch the current gear to G=G _when -1, that is, reduce one gear; end;

S178, if k1≤k≤k2, do not switch the current gear, that is, the current gear does not change; end.

Among them, k1 and k2 are preset thresholds. Preferably, k1<0, k2>0. More preferably, k1+k2=0. More preferably, |k1|=|k2|<(Wmax-Wmin)/n. This can ensure that the humidity value in the mask will not rapidly increase from Wmin to Wmax within the preset n sampling times.

It should be noted that, steps S110 and S130 may be executed sequentially or in parallel, which is not particularly limited in the present invention.

To sum up, the adaptive ventilator system provided by the embodiment of the present invention is provided with a humidity sensor in the mask worn by the user, and the controller samples the humidity value in the mask detected by the humidity sensor at predetermined intervals, and according to the humidity value sampled value to control the gear of the humidifier, including the setting of the initial gear and the gear switching during use, so as to control the humidity in the mask to a comfortable breathing environment suitable for breathing, which can improve the user experience.

The above-mentioned embodiments are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit them. Detailed description, those of ordinary skill in the art should understand: any person skilled in the art is within the technical scope disclosed by the present invention, and it can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, Or equivalently replace some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

An adaptive ventilator system, comprising: a ventilator, a controller and a mask, the ventilator includes a humidifier, the mask is connected to the humidifier through a pipeline, and a humidity sensor is arranged in the mask , the controller stores the preset reference temperature [Wmin, Wmax] and humidity queue Q=(Q1, Q2, ......, Qn), n is the preset queue length, Qi is each use The ith humidity value detected by the humidity sensor during the period, Q is initialized to Null; the controller is configured to, after the mask is worn, according to the humidity value detected by the humidity sensor, the reference temperature and the humidity queue to control the gears of the humidifier, the gears include an off gear indicating that the humidifier is in a closed state and a plurality of humidifying gears indicating that the humidifier is in a humidifying state.
The adaptive ventilator system according to claim 1, wherein the gears of the humidifier include m gears, m=2 x , x is an integer greater than or equal to 2, wherein 0 represents the off gear, 1 , ..., m-1 represents the gradually increasing humidification gear.
The adaptive ventilator system according to claim 1, wherein the controlling the gear position of the humidifier according to the humidity value detected by the humidity sensor, the reference temperature and the humidity queue comprises:

S100, sampling the humidity value W0 detected by the humidity sensor every predetermined time;

S110, if Q=Null, and W0<Wmin, then determine the gear G of the humidifier according to Wmin and W0, and do not add W0 to the humidity queue Q;

S120, if Q=Null and W0≥Wmin, then add W0 to the humidity queue Q.
The adaptive ventilator system according to claim 3, wherein in S110, the gear
The adaptive ventilator system according to claim 3, characterized in that, in S110, the gear position G is determined in the following manner:

If W0<D1, then G=m-1; otherwise,
D1 is the preset humidity threshold.
The adaptive ventilator system according to claim 5, wherein D1=Win/4.
The adaptive ventilator system according to claim 1, characterized in that, controlling the gear position of the humidifier according to the humidity value detected by the humidity sensor and the reference temperature and the humidity queue comprises:

S130, if W0>Wmax, and the current gear G is >0, then switch the current gear of the humidifier to gear G=G=-1;

S140, if Q≠Null, if the length of Q is less than n, then add W0 to Q;

S150, if the length of Q is equal to n, then remove Q1 from Q, move Qi+1 to Qi in the humidity queue, and add W0 to Q as Qn;

S160, obtain the humidity quantity z in the humidity queue Q, z≤n;

S170, according to the humidity value in Q, determine whether to switch the gear of the humidifier.
The ventilator system according to claim 7, wherein S170 specifically comprises:

S172, obtain k and b such that

S174, if k<k1, and the current gear G is <m-1, then switch the current gear to G=G when +1; end;

S176, if K>k2, and the current gear G is >0, then switch the current gear to G=G when -1; end;

S178, if k1≤k≤k2, do not switch the current gear; end;

k1 and k2 are preset thresholds.
The adaptive ventilator system according to claim 8, wherein k1<0, k2>0.
The adaptive ventilator system according to claim 9, wherein k1+k2=0.